version 1.3, 2000/12/01 09:26:12 |
version 1.6, 2002/07/24 08:00:11 |
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int ox_usr1_sent, ox_int_received, critical_when_signal; |
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static int inside_critical_section; |
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/* |
/* |
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers |
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers |
* Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved. |
* Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved. |
Line 17 static int inside_critical_section; |
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Line 14 static int inside_critical_section; |
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* modified is included with the above copyright notice. |
* modified is included with the above copyright notice. |
*/ |
*/ |
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# include "gc_priv.h" |
# include "private/gc_priv.h" |
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# if defined(LINUX) && !defined(POWERPC) |
# if defined(LINUX) && !defined(POWERPC) |
# include <linux/version.h> |
# include <linux/version.h> |
Line 48 static int inside_critical_section; |
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Line 45 static int inside_critical_section; |
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# endif /* 2 <= __GLIBC__ */ |
# endif /* 2 <= __GLIBC__ */ |
# endif |
# endif |
# endif |
# endif |
# if !defined(OS2) && !defined(PCR) && !defined(AMIGA) && !defined(MACOS) |
# if !defined(OS2) && !defined(PCR) && !defined(AMIGA) && !defined(MACOS) \ |
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&& !defined(MSWINCE) |
# include <sys/types.h> |
# include <sys/types.h> |
# if !defined(MSWIN32) && !defined(SUNOS4) |
# if !defined(MSWIN32) && !defined(SUNOS4) |
# include <unistd.h> |
# include <unistd.h> |
Line 56 static int inside_critical_section; |
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Line 54 static int inside_critical_section; |
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# endif |
# endif |
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# include <stdio.h> |
# include <stdio.h> |
# include <signal.h> |
# if defined(MSWINCE) |
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# define SIGSEGV 0 /* value is irrelevant */ |
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# else |
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# include <signal.h> |
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# endif |
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/* Blatantly OS dependent routines, except for those that are related */ |
/* Blatantly OS dependent routines, except for those that are related */ |
/* to dynamic loading. */ |
/* to dynamic loading. */ |
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# if !defined(THREADS) && !defined(STACKBOTTOM) && defined(HEURISTIC2) |
# if defined(HEURISTIC2) || defined(SEARCH_FOR_DATA_START) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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# if defined(IRIX_THREADS) || defined(HPUX_THREADS) |
# if !defined(STACKBOTTOM) && defined(HEURISTIC2) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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Line 73 static int inside_critical_section; |
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Line 75 static int inside_critical_section; |
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# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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# if (defined(SVR4) || defined(AUX) || defined(DGUX)) && !defined(PCR) |
# if (defined(SVR4) || defined(AUX) || defined(DGUX) \ |
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|| (defined(LINUX) && defined(SPARC))) && !defined(PCR) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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# if defined(LINUX) && \ |
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(defined(POWERPC) || defined(SPARC) || defined(ALPHA) || defined(IA64) \ |
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|| defined(MIPS)) |
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# define NEED_FIND_LIMIT |
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# endif |
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#ifdef NEED_FIND_LIMIT |
#ifdef NEED_FIND_LIMIT |
# include <setjmp.h> |
# include <setjmp.h> |
#endif |
#endif |
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#ifdef FREEBSD |
#if defined(FREEBSD) && defined(I386) |
# include <machine/trap.h> |
# include <machine/trap.h> |
#endif |
#endif |
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#ifdef AMIGA |
#ifdef AMIGA |
# include <proto/exec.h> |
# define GC_AMIGA_DEF |
# include <proto/dos.h> |
# include "AmigaOS.c" |
# include <dos/dosextens.h> |
# undef GC_AMIGA_DEF |
# include <workbench/startup.h> |
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#endif |
#endif |
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#ifdef MSWIN32 |
#if defined(MSWIN32) || defined(MSWINCE) |
# define WIN32_LEAN_AND_MEAN |
# define WIN32_LEAN_AND_MEAN |
# define NOSERVICE |
# define NOSERVICE |
# include <windows.h> |
# include <windows.h> |
Line 116 static int inside_critical_section; |
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Line 112 static int inside_critical_section; |
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# include <sys/types.h> |
# include <sys/types.h> |
# include <sys/mman.h> |
# include <sys/mman.h> |
# include <sys/stat.h> |
# include <sys/stat.h> |
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#endif |
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#ifdef UNIX_LIKE |
# include <fcntl.h> |
# include <fcntl.h> |
#endif |
#endif |
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#ifdef SUNOS5SIGS |
#if defined(SUNOS5SIGS) || defined (HURD) || defined(LINUX) |
# include <sys/siginfo.h> |
# ifdef SUNOS5SIGS |
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# include <sys/siginfo.h> |
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# endif |
# undef setjmp |
# undef setjmp |
# undef longjmp |
# undef longjmp |
# define setjmp(env) sigsetjmp(env, 1) |
# define setjmp(env) sigsetjmp(env, 1) |
Line 129 static int inside_critical_section; |
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Line 130 static int inside_critical_section; |
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#endif |
#endif |
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#ifdef DJGPP |
#ifdef DJGPP |
/* Apparently necessary for djgpp 2.01. May casuse problems with */ |
/* Apparently necessary for djgpp 2.01. May cause problems with */ |
/* other versions. */ |
/* other versions. */ |
typedef long unsigned int caddr_t; |
typedef long unsigned int caddr_t; |
#endif |
#endif |
Line 147 static int inside_critical_section; |
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Line 148 static int inside_critical_section; |
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#endif |
#endif |
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#if defined(SEARCH_FOR_DATA_START) |
#if defined(SEARCH_FOR_DATA_START) |
/* The following doesn't work if the GC is in a dynamic library. */ |
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/* The I386 case can be handled without a search. The Alpha case */ |
/* The I386 case can be handled without a search. The Alpha case */ |
/* used to be handled differently as well, but the rules changed */ |
/* used to be handled differently as well, but the rules changed */ |
/* for recent Linux versions. This seems to be the easiest way to */ |
/* for recent Linux versions. This seems to be the easiest way to */ |
/* cover all versions. */ |
/* cover all versions. */ |
ptr_t GC_data_start; |
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extern char * GC_copyright[]; /* Any data symbol would do. */ |
# ifdef LINUX |
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# pragma weak __data_start |
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extern int __data_start[]; |
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# pragma weak data_start |
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extern int data_start[]; |
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# endif /* LINUX */ |
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extern int _end[]; |
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ptr_t GC_data_start; |
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void GC_init_linux_data_start() |
void GC_init_linux_data_start() |
{ |
{ |
extern ptr_t GC_find_limit(); |
extern ptr_t GC_find_limit(); |
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GC_data_start = GC_find_limit((ptr_t)GC_copyright, FALSE); |
# ifdef LINUX |
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/* Try the easy approaches first: */ |
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if ((ptr_t)__data_start != 0) { |
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GC_data_start = (ptr_t)(__data_start); |
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return; |
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} |
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if ((ptr_t)data_start != 0) { |
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GC_data_start = (ptr_t)(data_start); |
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return; |
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} |
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# endif /* LINUX */ |
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GC_data_start = GC_find_limit((ptr_t)(_end), FALSE); |
} |
} |
#endif |
#endif |
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# ifdef ECOS |
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# ifndef ECOS_GC_MEMORY_SIZE |
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# define ECOS_GC_MEMORY_SIZE (448 * 1024) |
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# endif /* ECOS_GC_MEMORY_SIZE */ |
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// setjmp() function, as described in ANSI para 7.6.1.1 |
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#define setjmp( __env__ ) hal_setjmp( __env__ ) |
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// FIXME: This is a simple way of allocating memory which is |
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// compatible with ECOS early releases. Later releases use a more |
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// sophisticated means of allocating memory than this simple static |
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// allocator, but this method is at least bound to work. |
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static char memory[ECOS_GC_MEMORY_SIZE]; |
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static char *brk = memory; |
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static void *tiny_sbrk(ptrdiff_t increment) |
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{ |
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void *p = brk; |
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brk += increment; |
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if (brk > memory + sizeof memory) |
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{ |
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brk -= increment; |
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return NULL; |
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} |
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return p; |
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} |
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#define sbrk tiny_sbrk |
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# endif /* ECOS */ |
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#if (defined(NETBSD) || defined(OPENBSD)) && defined(__ELF__) |
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ptr_t GC_data_start; |
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void GC_init_netbsd_elf() |
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{ |
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extern ptr_t GC_find_limit(); |
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extern char **environ; |
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/* This may need to be environ, without the underscore, for */ |
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/* some versions. */ |
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GC_data_start = GC_find_limit((ptr_t)&environ, FALSE); |
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} |
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#endif |
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# ifdef OS2 |
# ifdef OS2 |
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# include <stddef.h> |
# include <stddef.h> |
Line 268 void GC_enable_signals(void) |
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Line 332 void GC_enable_signals(void) |
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# else |
# else |
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# if !defined(PCR) && !defined(AMIGA) && !defined(MSWIN32) \ |
# if !defined(PCR) && !defined(AMIGA) && !defined(MSWIN32) \ |
&& !defined(MACOS) && !defined(DJGPP) && !defined(DOS4GW) |
&& !defined(MSWINCE) \ |
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&& !defined(MACOS) && !defined(DJGPP) && !defined(DOS4GW) \ |
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&& !defined(NOSYS) && !defined(ECOS) |
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# if defined(sigmask) && !defined(UTS4) |
# if defined(sigmask) && !defined(UTS4) && !defined(HURD) |
/* Use the traditional BSD interface */ |
/* Use the traditional BSD interface */ |
# define SIGSET_T int |
# define SIGSET_T int |
# define SIG_DEL(set, signal) (set) &= ~(sigmask(signal)) |
# define SIG_DEL(set, signal) (set) &= ~(sigmask(signal)) |
Line 327 void GC_disable_signals() |
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Line 393 void GC_disable_signals() |
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GC_sig_disabled++; |
GC_sig_disabled++; |
# endif |
# endif |
SIGSETMASK(old_mask,new_mask); |
SIGSETMASK(old_mask,new_mask); |
if ( critical_when_signal ) |
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inside_critical_section = 1; |
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else { |
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inside_critical_section = 0; |
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critical_when_signal = 1; |
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} |
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} |
} |
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void GC_enable_signals() |
void GC_enable_signals() |
Line 342 void GC_enable_signals() |
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Line 402 void GC_enable_signals() |
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GC_sig_disabled--; |
GC_sig_disabled--; |
# endif |
# endif |
SIGSETMASK(dummy,old_mask); |
SIGSETMASK(dummy,old_mask); |
if ( !inside_critical_section ) { |
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critical_when_signal = 0; |
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if ( ox_usr1_sent ) { |
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ox_usr1_sent = 0; ox_usr1_handler(); |
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} |
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if ( ox_int_received ) { |
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ox_int_received = 0; int_handler(); |
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} |
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} else |
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inside_critical_section = 0; |
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} |
} |
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# endif /* !PCR */ |
# endif /* !PCR */ |
Line 359 void GC_enable_signals() |
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Line 409 void GC_enable_signals() |
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# endif /*!OS/2 */ |
# endif /*!OS/2 */ |
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/* Ivan Demakov: simplest way (to me) */ |
/* Ivan Demakov: simplest way (to me) */ |
#ifdef DOS4GW |
#if defined (DOS4GW) |
void GC_disable_signals() { } |
void GC_disable_signals() { } |
void GC_enable_signals() { } |
void GC_enable_signals() { } |
#endif |
#endif |
Line 367 void GC_enable_signals() |
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Line 417 void GC_enable_signals() |
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/* Find the page size */ |
/* Find the page size */ |
word GC_page_size; |
word GC_page_size; |
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# ifdef MSWIN32 |
# if defined(MSWIN32) || defined(MSWINCE) |
void GC_setpagesize() |
void GC_setpagesize() |
{ |
{ |
SYSTEM_INFO sysinfo; |
GetSystemInfo(&GC_sysinfo); |
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GC_page_size = GC_sysinfo.dwPageSize; |
GetSystemInfo(&sysinfo); |
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GC_page_size = sysinfo.dwPageSize; |
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} |
} |
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# else |
# else |
Line 398 word GC_page_size; |
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Line 446 word GC_page_size; |
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* With threads, GC_mark_roots needs to know how to do this. |
* With threads, GC_mark_roots needs to know how to do this. |
* Called with allocator lock held. |
* Called with allocator lock held. |
*/ |
*/ |
# ifdef MSWIN32 |
# if defined(MSWIN32) || defined(MSWINCE) |
# define is_writable(prot) ((prot) == PAGE_READWRITE \ |
# define is_writable(prot) ((prot) == PAGE_READWRITE \ |
|| (prot) == PAGE_WRITECOPY \ |
|| (prot) == PAGE_WRITECOPY \ |
|| (prot) == PAGE_EXECUTE_READWRITE \ |
|| (prot) == PAGE_EXECUTE_READWRITE \ |
Line 435 ptr_t GC_get_stack_base() |
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Line 483 ptr_t GC_get_stack_base() |
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} |
} |
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# else |
# endif /* MS Windows */ |
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# ifdef BEOS |
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# include <kernel/OS.h> |
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ptr_t GC_get_stack_base(){ |
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thread_info th; |
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get_thread_info(find_thread(NULL),&th); |
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return th.stack_end; |
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} |
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# endif /* BEOS */ |
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# ifdef OS2 |
# ifdef OS2 |
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ptr_t GC_get_stack_base() |
ptr_t GC_get_stack_base() |
Line 451 ptr_t GC_get_stack_base() |
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Line 509 ptr_t GC_get_stack_base() |
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return((ptr_t)(ptib -> tib_pstacklimit)); |
return((ptr_t)(ptib -> tib_pstacklimit)); |
} |
} |
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# else |
# endif /* OS2 */ |
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# ifdef AMIGA |
# ifdef AMIGA |
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# define GC_AMIGA_SB |
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# include "AmigaOS.c" |
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# undef GC_AMIGA_SB |
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# endif /* AMIGA */ |
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ptr_t GC_get_stack_base() |
# if defined(NEED_FIND_LIMIT) || defined(UNIX_LIKE) |
{ |
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struct Process *proc = (struct Process*)SysBase->ThisTask; |
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/* Reference: Amiga Guru Book Pages: 42,567,574 */ |
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if (proc->pr_Task.tc_Node.ln_Type==NT_PROCESS |
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&& proc->pr_CLI != NULL) { |
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/* first ULONG is StackSize */ |
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/*longPtr = proc->pr_ReturnAddr; |
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size = longPtr[0];*/ |
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return (char *)proc->pr_ReturnAddr + sizeof(ULONG); |
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} else { |
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return (char *)proc->pr_Task.tc_SPUpper; |
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} |
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} |
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#if 0 /* old version */ |
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ptr_t GC_get_stack_base() |
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{ |
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extern struct WBStartup *_WBenchMsg; |
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extern long __base; |
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extern long __stack; |
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struct Task *task; |
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struct Process *proc; |
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struct CommandLineInterface *cli; |
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long size; |
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if ((task = FindTask(0)) == 0) { |
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GC_err_puts("Cannot find own task structure\n"); |
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ABORT("task missing"); |
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} |
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proc = (struct Process *)task; |
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cli = BADDR(proc->pr_CLI); |
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if (_WBenchMsg != 0 || cli == 0) { |
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size = (char *)task->tc_SPUpper - (char *)task->tc_SPLower; |
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} else { |
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size = cli->cli_DefaultStack * 4; |
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} |
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return (ptr_t)(__base + GC_max(size, __stack)); |
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} |
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#endif /* 0 */ |
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# else /* !AMIGA, !OS2, ... */ |
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# ifdef NEED_FIND_LIMIT |
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/* Some tools to implement HEURISTIC2 */ |
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# define MIN_PAGE_SIZE 256 /* Smallest conceivable page size, bytes */ |
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/* static */ jmp_buf GC_jmp_buf; |
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/*ARGSUSED*/ |
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void GC_fault_handler(sig) |
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int sig; |
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{ |
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longjmp(GC_jmp_buf, 1); |
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} |
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# ifdef __STDC__ |
# ifdef __STDC__ |
typedef void (*handler)(int); |
typedef void (*handler)(int); |
# else |
# else |
typedef void (*handler)(); |
typedef void (*handler)(); |
# endif |
# endif |
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# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) || defined(HURD) |
static struct sigaction old_segv_act; |
static struct sigaction old_segv_act; |
# if defined(_sigargs) || defined(HPUX) /* !Irix6.x */ |
# if defined(_sigargs) /* !Irix6.x */ || defined(HPUX) || defined(HURD) |
static struct sigaction old_bus_act; |
static struct sigaction old_bus_act; |
# endif |
# endif |
# else |
# else |
static handler old_segv_handler, old_bus_handler; |
static handler old_segv_handler, old_bus_handler; |
# endif |
# endif |
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void GC_setup_temporary_fault_handler() |
# ifdef __STDC__ |
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void GC_set_and_save_fault_handler(handler h) |
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# else |
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void GC_set_and_save_fault_handler(h) |
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handler h; |
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# endif |
{ |
{ |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
# if defined(SUNOS5SIGS) || defined(IRIX5) \ |
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|| defined(OSF1) || defined(HURD) |
struct sigaction act; |
struct sigaction act; |
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act.sa_handler = GC_fault_handler; |
act.sa_handler = h; |
act.sa_flags = SA_RESTART | SA_NODEFER; |
# ifdef SUNOS5SIGS |
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act.sa_flags = SA_RESTART | SA_NODEFER; |
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# else |
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act.sa_flags = SA_RESTART; |
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# endif |
/* The presence of SA_NODEFER represents yet another gross */ |
/* The presence of SA_NODEFER represents yet another gross */ |
/* hack. Under Solaris 2.3, siglongjmp doesn't appear to */ |
/* hack. Under Solaris 2.3, siglongjmp doesn't appear to */ |
/* interact correctly with -lthread. We hide the confusion */ |
/* interact correctly with -lthread. We hide the confusion */ |
Line 542 ptr_t GC_get_stack_base() |
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Line 558 ptr_t GC_get_stack_base() |
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/* signal mask. */ |
/* signal mask. */ |
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(void) sigemptyset(&act.sa_mask); |
(void) sigemptyset(&act.sa_mask); |
# ifdef IRIX_THREADS |
# ifdef GC_IRIX_THREADS |
/* Older versions have a bug related to retrieving and */ |
/* Older versions have a bug related to retrieving and */ |
/* and setting a handler at the same time. */ |
/* and setting a handler at the same time. */ |
(void) sigaction(SIGSEGV, 0, &old_segv_act); |
(void) sigaction(SIGSEGV, 0, &old_segv_act); |
Line 550 ptr_t GC_get_stack_base() |
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Line 566 ptr_t GC_get_stack_base() |
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# else |
# else |
(void) sigaction(SIGSEGV, &act, &old_segv_act); |
(void) sigaction(SIGSEGV, &act, &old_segv_act); |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
|| defined(HPUX) |
|| defined(HPUX) || defined(HURD) |
/* Under Irix 5.x or HP/UX, we may get SIGBUS. */ |
/* Under Irix 5.x or HP/UX, we may get SIGBUS. */ |
/* Pthreads doesn't exist under Irix 5.x, so we */ |
/* Pthreads doesn't exist under Irix 5.x, so we */ |
/* don't have to worry in the threads case. */ |
/* don't have to worry in the threads case. */ |
(void) sigaction(SIGBUS, &act, &old_bus_act); |
(void) sigaction(SIGBUS, &act, &old_bus_act); |
# endif |
# endif |
# endif /* IRIX_THREADS */ |
# endif /* GC_IRIX_THREADS */ |
# else |
# else |
old_segv_handler = signal(SIGSEGV, GC_fault_handler); |
old_segv_handler = signal(SIGSEGV, h); |
# ifdef SIGBUS |
# ifdef SIGBUS |
old_bus_handler = signal(SIGBUS, GC_fault_handler); |
old_bus_handler = signal(SIGBUS, h); |
# endif |
# endif |
# endif |
# endif |
} |
} |
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# endif /* NEED_FIND_LIMIT || UNIX_LIKE */ |
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# ifdef NEED_FIND_LIMIT |
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/* Some tools to implement HEURISTIC2 */ |
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# define MIN_PAGE_SIZE 256 /* Smallest conceivable page size, bytes */ |
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/* static */ jmp_buf GC_jmp_buf; |
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/*ARGSUSED*/ |
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void GC_fault_handler(sig) |
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int sig; |
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{ |
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longjmp(GC_jmp_buf, 1); |
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} |
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void GC_setup_temporary_fault_handler() |
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{ |
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GC_set_and_save_fault_handler(GC_fault_handler); |
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} |
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void GC_reset_fault_handler() |
void GC_reset_fault_handler() |
{ |
{ |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
# if defined(SUNOS5SIGS) || defined(IRIX5) \ |
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|| defined(OSF1) || defined(HURD) |
(void) sigaction(SIGSEGV, &old_segv_act, 0); |
(void) sigaction(SIGSEGV, &old_segv_act, 0); |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
|| defined(HPUX) |
|| defined(HPUX) || defined(HURD) |
(void) sigaction(SIGBUS, &old_bus_act, 0); |
(void) sigaction(SIGBUS, &old_bus_act, 0); |
# endif |
# endif |
# else |
# else |
Line 615 ptr_t GC_get_stack_base() |
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Line 650 ptr_t GC_get_stack_base() |
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} |
} |
# endif |
# endif |
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#if defined(ECOS) || defined(NOSYS) |
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ptr_t GC_get_stack_base() |
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{ |
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return STACKBOTTOM; |
|
} |
|
#endif |
|
|
#ifdef LINUX_STACKBOTTOM |
#ifdef LINUX_STACKBOTTOM |
|
|
#include <sys/types.h> |
#include <sys/types.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
#include <fcntl.h> |
|
|
|
# define STAT_SKIP 27 /* Number of fields preceding startstack */ |
# define STAT_SKIP 27 /* Number of fields preceding startstack */ |
/* field in /proc/self/stat */ |
/* field in /proc/self/stat */ |
|
|
|
# pragma weak __libc_stack_end |
|
extern ptr_t __libc_stack_end; |
|
|
|
# ifdef IA64 |
|
# pragma weak __libc_ia64_register_backing_store_base |
|
extern ptr_t __libc_ia64_register_backing_store_base; |
|
|
|
ptr_t GC_get_register_stack_base(void) |
|
{ |
|
if (0 != &__libc_ia64_register_backing_store_base |
|
&& 0 != __libc_ia64_register_backing_store_base) { |
|
/* Glibc 2.2.4 has a bug such that for dynamically linked */ |
|
/* executables __libc_ia64_register_backing_store_base is */ |
|
/* defined but ininitialized during constructor calls. */ |
|
/* Hence we check for both nonzero address and value. */ |
|
return __libc_ia64_register_backing_store_base; |
|
} else { |
|
word result = (word)GC_stackbottom - BACKING_STORE_DISPLACEMENT; |
|
result += BACKING_STORE_ALIGNMENT - 1; |
|
result &= ~(BACKING_STORE_ALIGNMENT - 1); |
|
return (ptr_t)result; |
|
} |
|
} |
|
# endif |
|
|
ptr_t GC_linux_stack_base(void) |
ptr_t GC_linux_stack_base(void) |
{ |
{ |
/* We read the stack base value from /proc/self/stat. We do this */ |
/* We read the stack base value from /proc/self/stat. We do this */ |
/* using direct I/O system calls in order to avoid calling malloc */ |
/* using direct I/O system calls in order to avoid calling malloc */ |
/* in case REDIRECT_MALLOC is defined. */ |
/* in case REDIRECT_MALLOC is defined. */ |
# define STAT_BUF_SIZE 4096 |
# define STAT_BUF_SIZE 4096 |
# ifdef USE_LD_WRAP |
# if defined(GC_USE_LD_WRAP) |
# define STAT_READ __real_read |
# define STAT_READ __real_read |
# else |
# else |
# define STAT_READ read |
# define STAT_READ read |
Line 641 ptr_t GC_get_stack_base() |
|
Line 707 ptr_t GC_get_stack_base() |
|
word result = 0; |
word result = 0; |
size_t i, buf_offset = 0; |
size_t i, buf_offset = 0; |
|
|
|
/* First try the easy way. This should work for glibc 2.2 */ |
|
if (0 != &__libc_stack_end) { |
|
# ifdef IA64 |
|
/* Some versions of glibc set the address 16 bytes too */ |
|
/* low while the initialization code is running. */ |
|
if (((word)__libc_stack_end & 0xfff) + 0x10 < 0x1000) { |
|
return __libc_stack_end + 0x10; |
|
} /* Otherwise it's not safe to add 16 bytes and we fall */ |
|
/* back to using /proc. */ |
|
# else |
|
return __libc_stack_end; |
|
# endif |
|
} |
f = open("/proc/self/stat", O_RDONLY); |
f = open("/proc/self/stat", O_RDONLY); |
if (f < 0 || STAT_READ(f, stat_buf, STAT_BUF_SIZE) < 2 * STAT_SKIP) { |
if (f < 0 || STAT_READ(f, stat_buf, STAT_BUF_SIZE) < 2 * STAT_SKIP) { |
ABORT("Couldn't read /proc/self/stat"); |
ABORT("Couldn't read /proc/self/stat"); |
Line 665 ptr_t GC_get_stack_base() |
|
Line 744 ptr_t GC_get_stack_base() |
|
|
|
#endif /* LINUX_STACKBOTTOM */ |
#endif /* LINUX_STACKBOTTOM */ |
|
|
|
#ifdef FREEBSD_STACKBOTTOM |
|
|
|
/* This uses an undocumented sysctl call, but at least one expert */ |
|
/* believes it will stay. */ |
|
|
|
#include <unistd.h> |
|
#include <sys/types.h> |
|
#include <sys/sysctl.h> |
|
|
|
ptr_t GC_freebsd_stack_base(void) |
|
{ |
|
int nm[2] = {CTL_KERN, KERN_USRSTACK}; |
|
ptr_t base; |
|
size_t len = sizeof(ptr_t); |
|
int r = sysctl(nm, 2, &base, &len, NULL, 0); |
|
|
|
if (r) ABORT("Error getting stack base"); |
|
|
|
return base; |
|
} |
|
|
|
#endif /* FREEBSD_STACKBOTTOM */ |
|
|
|
#if !defined(BEOS) && !defined(AMIGA) && !defined(MSWIN32) \ |
|
&& !defined(MSWINCE) && !defined(OS2) |
|
|
ptr_t GC_get_stack_base() |
ptr_t GC_get_stack_base() |
{ |
{ |
word dummy; |
word dummy; |
Line 688 ptr_t GC_get_stack_base() |
|
Line 793 ptr_t GC_get_stack_base() |
|
# ifdef LINUX_STACKBOTTOM |
# ifdef LINUX_STACKBOTTOM |
result = GC_linux_stack_base(); |
result = GC_linux_stack_base(); |
# endif |
# endif |
|
# ifdef FREEBSD_STACKBOTTOM |
|
result = GC_freebsd_stack_base(); |
|
# endif |
# ifdef HEURISTIC2 |
# ifdef HEURISTIC2 |
# ifdef STACK_GROWS_DOWN |
# ifdef STACK_GROWS_DOWN |
result = GC_find_limit((ptr_t)(&dummy), TRUE); |
result = GC_find_limit((ptr_t)(&dummy), TRUE); |
Line 715 ptr_t GC_get_stack_base() |
|
Line 823 ptr_t GC_get_stack_base() |
|
# endif /* STACKBOTTOM */ |
# endif /* STACKBOTTOM */ |
} |
} |
|
|
# endif /* ! AMIGA */ |
# endif /* ! AMIGA, !OS 2, ! MS Windows, !BEOS */ |
# endif /* ! OS2 */ |
|
# endif /* ! MSWIN32 */ |
|
|
|
/* |
/* |
* Register static data segment(s) as roots. |
* Register static data segment(s) as roots. |
Line 817 void GC_register_data_segments() |
|
Line 923 void GC_register_data_segments() |
|
} |
} |
} |
} |
|
|
# else |
# else /* !OS2 */ |
|
|
|
# if defined(MSWIN32) || defined(MSWINCE) |
|
|
# ifdef MSWIN32 |
# ifdef MSWIN32 |
/* Unfortunately, we have to handle win32s very differently from NT, */ |
/* Unfortunately, we have to handle win32s very differently from NT, */ |
/* Since VirtualQuery has very different semantics. In particular, */ |
/* Since VirtualQuery has very different semantics. In particular, */ |
/* under win32s a VirtualQuery call on an unmapped page returns an */ |
/* under win32s a VirtualQuery call on an unmapped page returns an */ |
/* invalid result. Under GC_register_data_segments is a noop and */ |
/* invalid result. Under NT, GC_register_data_segments is a noop and */ |
/* all real work is done by GC_register_dynamic_libraries. Under */ |
/* all real work is done by GC_register_dynamic_libraries. Under */ |
/* win32s, we cannot find the data segments associated with dll's. */ |
/* win32s, we cannot find the data segments associated with dll's. */ |
/* We rgister the main data segment here. */ |
/* We rgister the main data segment here. */ |
GC_bool GC_win32s = FALSE; /* We're running under win32s. */ |
# ifdef __GCC__ |
|
GC_bool GC_no_win32_dlls = TRUE; /* GCC can't do SEH, so we can't use VirtualQuery */ |
|
# else |
|
GC_bool GC_no_win32_dlls = FALSE; |
|
# endif |
|
|
GC_bool GC_is_win32s() |
|
{ |
|
DWORD v = GetVersion(); |
|
|
|
/* Check that this is not NT, and Windows major version <= 3 */ |
|
return ((v & 0x80000000) && (v & 0xff) <= 3); |
|
} |
|
|
|
void GC_init_win32() |
void GC_init_win32() |
{ |
{ |
GC_win32s = GC_is_win32s(); |
/* if we're running under win32s, assume that no DLLs will be loaded */ |
|
DWORD v = GetVersion(); |
|
GC_no_win32_dlls |= ((v & 0x80000000) && (v & 0xff) <= 3); |
} |
} |
|
|
/* Return the smallest address a such that VirtualQuery */ |
/* Return the smallest address a such that VirtualQuery */ |
/* returns correct results for all addresses between a and start. */ |
/* returns correct results for all addresses between a and start. */ |
/* Assumes VirtualQuery returns correct information for start. */ |
/* Assumes VirtualQuery returns correct information for start. */ |
ptr_t GC_least_described_address(ptr_t start) |
ptr_t GC_least_described_address(ptr_t start) |
{ |
{ |
MEMORY_BASIC_INFORMATION buf; |
MEMORY_BASIC_INFORMATION buf; |
SYSTEM_INFO sysinfo; |
|
DWORD result; |
DWORD result; |
LPVOID limit; |
LPVOID limit; |
ptr_t p; |
ptr_t p; |
LPVOID q; |
LPVOID q; |
|
|
GetSystemInfo(&sysinfo); |
limit = GC_sysinfo.lpMinimumApplicationAddress; |
limit = sysinfo.lpMinimumApplicationAddress; |
|
p = (ptr_t)((word)start & ~(GC_page_size - 1)); |
p = (ptr_t)((word)start & ~(GC_page_size - 1)); |
for (;;) { |
for (;;) { |
q = (LPVOID)(p - GC_page_size); |
q = (LPVOID)(p - GC_page_size); |
Line 866 void GC_register_data_segments() |
|
Line 970 void GC_register_data_segments() |
|
} |
} |
return(p); |
return(p); |
} |
} |
|
# endif |
|
|
/* Is p the start of either the malloc heap, or of one of our */ |
/* Is p the start of either the malloc heap, or of one of our */ |
/* heap sections? */ |
/* heap sections? */ |
Line 879 void GC_register_data_segments() |
|
Line 984 void GC_register_data_segments() |
|
|
|
if (0 == malloc_heap_pointer) { |
if (0 == malloc_heap_pointer) { |
MEMORY_BASIC_INFORMATION buf; |
MEMORY_BASIC_INFORMATION buf; |
register DWORD result = VirtualQuery(malloc(1), &buf, sizeof(buf)); |
void *pTemp = malloc( 1 ); |
|
register DWORD result = VirtualQuery(pTemp, &buf, sizeof(buf)); |
|
|
|
free( pTemp ); |
|
|
|
|
if (result != sizeof(buf)) { |
if (result != sizeof(buf)) { |
ABORT("Weird VirtualQuery result"); |
ABORT("Weird VirtualQuery result"); |
Line 893 void GC_register_data_segments() |
|
Line 1002 void GC_register_data_segments() |
|
} |
} |
return(FALSE); |
return(FALSE); |
} |
} |
|
|
|
# ifdef MSWIN32 |
void GC_register_root_section(ptr_t static_root) |
void GC_register_root_section(ptr_t static_root) |
{ |
{ |
MEMORY_BASIC_INFORMATION buf; |
MEMORY_BASIC_INFORMATION buf; |
SYSTEM_INFO sysinfo; |
|
DWORD result; |
DWORD result; |
DWORD protect; |
DWORD protect; |
LPVOID p; |
LPVOID p; |
char * base; |
char * base; |
char * limit, * new_limit; |
char * limit, * new_limit; |
|
|
if (!GC_win32s) return; |
if (!GC_no_win32_dlls) return; |
p = base = limit = GC_least_described_address(static_root); |
p = base = limit = GC_least_described_address(static_root); |
GetSystemInfo(&sysinfo); |
while (p < GC_sysinfo.lpMaximumApplicationAddress) { |
while (p < sysinfo.lpMaximumApplicationAddress) { |
|
result = VirtualQuery(p, &buf, sizeof(buf)); |
result = VirtualQuery(p, &buf, sizeof(buf)); |
if (result != sizeof(buf) || buf.AllocationBase == 0 |
if (result != sizeof(buf) || buf.AllocationBase == 0 |
|| GC_is_heap_base(buf.AllocationBase)) break; |
|| GC_is_heap_base(buf.AllocationBase)) break; |
Line 928 void GC_register_data_segments() |
|
Line 1036 void GC_register_data_segments() |
|
} |
} |
if (base != limit) GC_add_roots_inner(base, limit, FALSE); |
if (base != limit) GC_add_roots_inner(base, limit, FALSE); |
} |
} |
|
#endif |
|
|
void GC_register_data_segments() |
void GC_register_data_segments() |
{ |
{ |
|
# ifdef MSWIN32 |
static char dummy; |
static char dummy; |
|
|
GC_register_root_section((ptr_t)(&dummy)); |
GC_register_root_section((ptr_t)(&dummy)); |
} |
|
# else |
|
# ifdef AMIGA |
|
|
|
void GC_register_data_segments() |
|
{ |
|
struct Process *proc; |
|
struct CommandLineInterface *cli; |
|
BPTR myseglist; |
|
ULONG *data; |
|
|
|
int num; |
|
|
|
|
|
# ifdef __GNUC__ |
|
ULONG dataSegSize; |
|
GC_bool found_segment = FALSE; |
|
extern char __data_size[]; |
|
|
|
dataSegSize=__data_size+8; |
|
/* Can`t find the Location of __data_size, because |
|
it`s possible that is it, inside the segment. */ |
|
|
|
# endif |
# endif |
|
|
proc= (struct Process*)SysBase->ThisTask; |
|
|
|
/* Reference: Amiga Guru Book Pages: 538ff,565,573 |
|
and XOper.asm */ |
|
if (proc->pr_Task.tc_Node.ln_Type==NT_PROCESS) { |
|
if (proc->pr_CLI == NULL) { |
|
myseglist = proc->pr_SegList; |
|
} else { |
|
/* ProcLoaded 'Loaded as a command: '*/ |
|
cli = BADDR(proc->pr_CLI); |
|
myseglist = cli->cli_Module; |
|
} |
|
} else { |
|
ABORT("Not a Process."); |
|
} |
|
|
|
if (myseglist == NULL) { |
|
ABORT("Arrrgh.. can't find segments, aborting"); |
|
} |
|
|
|
/* xoper hunks Shell Process */ |
|
|
|
num=0; |
|
for (data = (ULONG *)BADDR(myseglist); data != NULL; |
|
data = (ULONG *)BADDR(data[0])) { |
|
if (((ULONG) GC_register_data_segments < (ULONG) &data[1]) || |
|
((ULONG) GC_register_data_segments > (ULONG) &data[1] + data[-1])) { |
|
# ifdef __GNUC__ |
|
if (dataSegSize == data[-1]) { |
|
found_segment = TRUE; |
|
} |
|
# endif |
|
GC_add_roots_inner((char *)&data[1], |
|
((char *)&data[1]) + data[-1], FALSE); |
|
} |
|
++num; |
|
} /* for */ |
|
# ifdef __GNUC__ |
|
if (!found_segment) { |
|
ABORT("Can`t find correct Segments.\nSolution: Use an newer version of ixemul.library"); |
|
} |
|
# endif |
|
} |
} |
|
|
#if 0 /* old version */ |
# else /* !OS2 && !Windows */ |
void GC_register_data_segments() |
|
{ |
|
extern struct WBStartup *_WBenchMsg; |
|
struct Process *proc; |
|
struct CommandLineInterface *cli; |
|
BPTR myseglist; |
|
ULONG *data; |
|
|
|
if ( _WBenchMsg != 0 ) { |
# if (defined(SVR4) || defined(AUX) || defined(DGUX) \ |
if ((myseglist = _WBenchMsg->sm_Segment) == 0) { |
|| (defined(LINUX) && defined(SPARC))) && !defined(PCR) |
GC_err_puts("No seglist from workbench\n"); |
|
return; |
|
} |
|
} else { |
|
if ((proc = (struct Process *)FindTask(0)) == 0) { |
|
GC_err_puts("Cannot find process structure\n"); |
|
return; |
|
} |
|
if ((cli = BADDR(proc->pr_CLI)) == 0) { |
|
GC_err_puts("No CLI\n"); |
|
return; |
|
} |
|
if ((myseglist = cli->cli_Module) == 0) { |
|
GC_err_puts("No seglist from CLI\n"); |
|
return; |
|
} |
|
} |
|
|
|
for (data = (ULONG *)BADDR(myseglist); data != 0; |
|
data = (ULONG *)BADDR(data[0])) { |
|
# ifdef AMIGA_SKIP_SEG |
|
if (((ULONG) GC_register_data_segments < (ULONG) &data[1]) || |
|
((ULONG) GC_register_data_segments > (ULONG) &data[1] + data[-1])) { |
|
# else |
|
{ |
|
# endif /* AMIGA_SKIP_SEG */ |
|
GC_add_roots_inner((char *)&data[1], |
|
((char *)&data[1]) + data[-1], FALSE); |
|
} |
|
} |
|
} |
|
#endif /* old version */ |
|
|
|
|
|
# else |
|
|
|
# if (defined(SVR4) || defined(AUX) || defined(DGUX)) && !defined(PCR) |
|
char * GC_SysVGetDataStart(max_page_size, etext_addr) |
char * GC_SysVGetDataStart(max_page_size, etext_addr) |
int max_page_size; |
int max_page_size; |
int * etext_addr; |
int * etext_addr; |
Line 1084 int * etext_addr; |
|
Line 1083 int * etext_addr; |
|
# endif |
# endif |
|
|
|
|
|
#ifdef AMIGA |
|
|
|
# define GC_AMIGA_DS |
|
# include "AmigaOS.c" |
|
# undef GC_AMIGA_DS |
|
|
|
#else /* !OS2 && !Windows && !AMIGA */ |
|
|
void GC_register_data_segments() |
void GC_register_data_segments() |
{ |
{ |
# if !defined(PCR) && !defined(SRC_M3) && !defined(NEXT) && !defined(MACOS) \ |
# if !defined(PCR) && !defined(SRC_M3) && !defined(NEXT) && !defined(MACOS) \ |
&& !defined(MACOSX) |
&& !defined(MACOSX) |
# if defined(REDIRECT_MALLOC) && defined(SOLARIS_THREADS) |
# if defined(REDIRECT_MALLOC) && defined(GC_SOLARIS_THREADS) |
/* As of Solaris 2.3, the Solaris threads implementation */ |
/* As of Solaris 2.3, the Solaris threads implementation */ |
/* allocates the data structure for the initial thread with */ |
/* allocates the data structure for the initial thread with */ |
/* sbrk at process startup. It needs to be scanned, so that */ |
/* sbrk at process startup. It needs to be scanned, so that */ |
Line 1099 void GC_register_data_segments() |
|
Line 1106 void GC_register_data_segments() |
|
GC_add_roots_inner(DATASTART, (char *)sbrk(0), FALSE); |
GC_add_roots_inner(DATASTART, (char *)sbrk(0), FALSE); |
# else |
# else |
GC_add_roots_inner(DATASTART, (char *)(DATAEND), FALSE); |
GC_add_roots_inner(DATASTART, (char *)(DATAEND), FALSE); |
|
# if defined(DATASTART2) |
|
GC_add_roots_inner(DATASTART2, (char *)(DATAEND2), FALSE); |
|
# endif |
# endif |
# endif |
# endif |
# endif |
# if !defined(PCR) && (defined(NEXT) || defined(MACOSX)) |
# if !defined(PCR) && (defined(NEXT) || defined(MACOSX)) |
Line 1143 void GC_register_data_segments() |
|
Line 1153 void GC_register_data_segments() |
|
} |
} |
|
|
# endif /* ! AMIGA */ |
# endif /* ! AMIGA */ |
# endif /* ! MSWIN32 */ |
# endif /* ! MSWIN32 && ! MSWINCE*/ |
# endif /* ! OS2 */ |
# endif /* ! OS2 */ |
|
|
/* |
/* |
* Auxiliary routines for obtaining memory from OS. |
* Auxiliary routines for obtaining memory from OS. |
*/ |
*/ |
|
|
# if !defined(OS2) && !defined(PCR) && !defined(AMIGA) \ |
# if !defined(OS2) && !defined(PCR) && !defined(AMIGA) \ |
&& !defined(MSWIN32) && !defined(MACOS) && !defined(DOS4GW) |
&& !defined(MSWIN32) && !defined(MSWINCE) \ |
|
&& !defined(MACOS) && !defined(DOS4GW) |
|
|
# ifdef SUNOS4 |
# ifdef SUNOS4 |
extern caddr_t sbrk(); |
extern caddr_t sbrk(); |
Line 1162 void GC_register_data_segments() |
|
Line 1173 void GC_register_data_segments() |
|
# define SBRK_ARG_T int |
# define SBRK_ARG_T int |
# endif |
# endif |
|
|
|
|
# ifdef RS6000 |
# ifdef RS6000 |
/* The compiler seems to generate speculative reads one past the end of */ |
/* The compiler seems to generate speculative reads one past the end of */ |
/* an allocated object. Hence we need to make sure that the page */ |
/* an allocated object. Hence we need to make sure that the page */ |
|
|
#else /* Not RS6000 */ |
#else /* Not RS6000 */ |
|
|
#if defined(USE_MMAP) |
#if defined(USE_MMAP) |
/* Tested only under IRIX5 and Solaris 2 */ |
/* Tested only under Linux, IRIX5 and Solaris 2 */ |
|
|
#ifdef USE_MMAP_FIXED |
#ifdef USE_MMAP_FIXED |
# define GC_MMAP_FLAGS MAP_FIXED | MAP_PRIVATE |
# define GC_MMAP_FLAGS MAP_FIXED | MAP_PRIVATE |
|
|
# define GC_MMAP_FLAGS MAP_PRIVATE |
# define GC_MMAP_FLAGS MAP_PRIVATE |
#endif |
#endif |
|
|
|
#ifndef HEAP_START |
|
# define HEAP_START 0 |
|
#endif |
|
|
ptr_t GC_unix_get_mem(bytes) |
ptr_t GC_unix_get_mem(bytes) |
word bytes; |
word bytes; |
{ |
{ |
|
|
if (result == MAP_FAILED) return(0); |
if (result == MAP_FAILED) return(0); |
last_addr = (ptr_t)result + bytes + GC_page_size - 1; |
last_addr = (ptr_t)result + bytes + GC_page_size - 1; |
last_addr = (ptr_t)((word)last_addr & ~(GC_page_size - 1)); |
last_addr = (ptr_t)((word)last_addr & ~(GC_page_size - 1)); |
|
# if !defined(LINUX) |
|
if (last_addr == 0) { |
|
/* Oops. We got the end of the address space. This isn't */ |
|
/* usable by arbitrary C code, since one-past-end pointers */ |
|
/* don't work, so we discard it and try again. */ |
|
munmap(result, (size_t)(-GC_page_size) - (size_t)result); |
|
/* Leave last page mapped, so we can't repeat. */ |
|
return GC_unix_get_mem(bytes); |
|
} |
|
# else |
|
GC_ASSERT(last_addr != 0); |
|
# endif |
return((ptr_t)result); |
return((ptr_t)result); |
} |
} |
|
|
Line 1275 void * os2_alloc(size_t bytes) |
|
Line 1303 void * os2_alloc(size_t bytes) |
|
# endif /* OS2 */ |
# endif /* OS2 */ |
|
|
|
|
|
# if defined(MSWIN32) || defined(MSWINCE) |
|
SYSTEM_INFO GC_sysinfo; |
|
# endif |
|
|
# ifdef MSWIN32 |
# ifdef MSWIN32 |
|
|
|
# ifdef USE_GLOBAL_ALLOC |
|
# define GLOBAL_ALLOC_TEST 1 |
|
# else |
|
# define GLOBAL_ALLOC_TEST GC_no_win32_dlls |
|
# endif |
|
|
word GC_n_heap_bases = 0; |
word GC_n_heap_bases = 0; |
|
|
ptr_t GC_win32_get_mem(bytes) |
ptr_t GC_win32_get_mem(bytes) |
word bytes; |
word bytes; |
{ |
{ |
ptr_t result; |
ptr_t result; |
|
|
if (GC_win32s) { |
if (GLOBAL_ALLOC_TEST) { |
/* VirtualAlloc doesn't like PAGE_EXECUTE_READWRITE. */ |
/* VirtualAlloc doesn't like PAGE_EXECUTE_READWRITE. */ |
/* There are also unconfirmed rumors of other */ |
/* There are also unconfirmed rumors of other */ |
/* problems, so we dodge the issue. */ |
/* problems, so we dodge the issue. */ |
result = (ptr_t) GlobalAlloc(0, bytes + HBLKSIZE); |
result = (ptr_t) GlobalAlloc(0, bytes + HBLKSIZE); |
result = (ptr_t)(((word)result + HBLKSIZE) & ~(HBLKSIZE-1)); |
result = (ptr_t)(((word)result + HBLKSIZE) & ~(HBLKSIZE-1)); |
} else { |
} else { |
result = (ptr_t) VirtualAlloc(NULL, bytes, |
/* VirtualProtect only works on regions returned by a */ |
|
/* single VirtualAlloc call. Thus we allocate one */ |
|
/* extra page, which will prevent merging of blocks */ |
|
/* in separate regions, and eliminate any temptation */ |
|
/* to call VirtualProtect on a range spanning regions. */ |
|
/* This wastes a small amount of memory, and risks */ |
|
/* increased fragmentation. But better alternatives */ |
|
/* would require effort. */ |
|
result = (ptr_t) VirtualAlloc(NULL, bytes + 1, |
MEM_COMMIT | MEM_RESERVE, |
MEM_COMMIT | MEM_RESERVE, |
PAGE_EXECUTE_READWRITE); |
PAGE_EXECUTE_READWRITE); |
} |
} |
|
|
|
|
void GC_win32_free_heap () |
void GC_win32_free_heap () |
{ |
{ |
if (GC_win32s) { |
if (GC_no_win32_dlls) { |
while (GC_n_heap_bases > 0) { |
while (GC_n_heap_bases > 0) { |
GlobalFree (GC_heap_bases[--GC_n_heap_bases]); |
GlobalFree (GC_heap_bases[--GC_n_heap_bases]); |
GC_heap_bases[GC_n_heap_bases] = 0; |
GC_heap_bases[GC_n_heap_bases] = 0; |
} |
} |
} |
} |
} |
} |
|
# endif |
|
|
|
#ifdef AMIGA |
|
# define GC_AMIGA_AM |
|
# include "AmigaOS.c" |
|
# undef GC_AMIGA_AM |
|
#endif |
|
|
|
|
|
# ifdef MSWINCE |
|
word GC_n_heap_bases = 0; |
|
|
|
ptr_t GC_wince_get_mem(bytes) |
|
word bytes; |
|
{ |
|
ptr_t result; |
|
word i; |
|
|
|
/* Round up allocation size to multiple of page size */ |
|
bytes = (bytes + GC_page_size-1) & ~(GC_page_size-1); |
|
|
|
/* Try to find reserved, uncommitted pages */ |
|
for (i = 0; i < GC_n_heap_bases; i++) { |
|
if (((word)(-(signed_word)GC_heap_lengths[i]) |
|
& (GC_sysinfo.dwAllocationGranularity-1)) |
|
>= bytes) { |
|
result = GC_heap_bases[i] + GC_heap_lengths[i]; |
|
break; |
|
} |
|
} |
|
|
|
if (i == GC_n_heap_bases) { |
|
/* Reserve more pages */ |
|
word res_bytes = (bytes + GC_sysinfo.dwAllocationGranularity-1) |
|
& ~(GC_sysinfo.dwAllocationGranularity-1); |
|
/* If we ever support MPROTECT_VDB here, we will probably need to */ |
|
/* ensure that res_bytes is strictly > bytes, so that VirtualProtect */ |
|
/* never spans regions. It seems to be OK for a VirtualFree argument */ |
|
/* to span regions, so we should be OK for now. */ |
|
result = (ptr_t) VirtualAlloc(NULL, res_bytes, |
|
MEM_RESERVE | MEM_TOP_DOWN, |
|
PAGE_EXECUTE_READWRITE); |
|
if (HBLKDISPL(result) != 0) ABORT("Bad VirtualAlloc result"); |
|
/* If I read the documentation correctly, this can */ |
|
/* only happen if HBLKSIZE > 64k or not a power of 2. */ |
|
if (GC_n_heap_bases >= MAX_HEAP_SECTS) ABORT("Too many heap sections"); |
|
GC_heap_bases[GC_n_heap_bases] = result; |
|
GC_heap_lengths[GC_n_heap_bases] = 0; |
|
GC_n_heap_bases++; |
|
} |
|
|
|
/* Commit pages */ |
|
result = (ptr_t) VirtualAlloc(result, bytes, |
|
MEM_COMMIT, |
|
PAGE_EXECUTE_READWRITE); |
|
if (result != NULL) { |
|
if (HBLKDISPL(result) != 0) ABORT("Bad VirtualAlloc result"); |
|
GC_heap_lengths[i] += bytes; |
|
} |
|
|
|
return(result); |
|
} |
# endif |
# endif |
|
|
#ifdef USE_MUNMAP |
#ifdef USE_MUNMAP |
|
|
/* For now, this only works on some Unix-like systems. If you */ |
/* For now, this only works on Win32/WinCE and some Unix-like */ |
/* have something else, don't define USE_MUNMAP. */ |
/* systems. If you have something else, don't define */ |
|
/* USE_MUNMAP. */ |
/* We assume ANSI C to support this feature. */ |
/* We assume ANSI C to support this feature. */ |
|
|
|
#if !defined(MSWIN32) && !defined(MSWINCE) |
|
|
#include <unistd.h> |
#include <unistd.h> |
#include <sys/mman.h> |
#include <sys/mman.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
#include <sys/types.h> |
#include <sys/types.h> |
#include <fcntl.h> |
|
|
|
|
#endif |
|
|
/* Compute a page aligned starting address for the unmap */ |
/* Compute a page aligned starting address for the unmap */ |
/* operation on a block of size bytes starting at start. */ |
/* operation on a block of size bytes starting at start. */ |
/* Return 0 if the block is too small to make this feasible. */ |
/* Return 0 if the block is too small to make this feasible. */ |
Line 1348 ptr_t GC_unmap_end(ptr_t start, word bytes) |
|
Line 1460 ptr_t GC_unmap_end(ptr_t start, word bytes) |
|
return end_addr; |
return end_addr; |
} |
} |
|
|
|
/* Under Win32/WinCE we commit (map) and decommit (unmap) */ |
|
/* memory using VirtualAlloc and VirtualFree. These functions */ |
|
/* work on individual allocations of virtual memory, made */ |
|
/* previously using VirtualAlloc with the MEM_RESERVE flag. */ |
|
/* The ranges we need to (de)commit may span several of these */ |
|
/* allocations; therefore we use VirtualQuery to check */ |
|
/* allocation lengths, and split up the range as necessary. */ |
|
|
/* We assume that GC_remap is called on exactly the same range */ |
/* We assume that GC_remap is called on exactly the same range */ |
/* as a previous call to GC_unmap. It is safe to consistently */ |
/* as a previous call to GC_unmap. It is safe to consistently */ |
/* round the endpoints in both places. */ |
/* round the endpoints in both places. */ |
Line 1357 void GC_unmap(ptr_t start, word bytes) |
|
Line 1477 void GC_unmap(ptr_t start, word bytes) |
|
ptr_t end_addr = GC_unmap_end(start, bytes); |
ptr_t end_addr = GC_unmap_end(start, bytes); |
word len = end_addr - start_addr; |
word len = end_addr - start_addr; |
if (0 == start_addr) return; |
if (0 == start_addr) return; |
if (munmap(start_addr, len) != 0) ABORT("munmap failed"); |
# if defined(MSWIN32) || defined(MSWINCE) |
GC_unmapped_bytes += len; |
while (len != 0) { |
|
MEMORY_BASIC_INFORMATION mem_info; |
|
GC_word free_len; |
|
if (VirtualQuery(start_addr, &mem_info, sizeof(mem_info)) |
|
!= sizeof(mem_info)) |
|
ABORT("Weird VirtualQuery result"); |
|
free_len = (len < mem_info.RegionSize) ? len : mem_info.RegionSize; |
|
if (!VirtualFree(start_addr, free_len, MEM_DECOMMIT)) |
|
ABORT("VirtualFree failed"); |
|
GC_unmapped_bytes += free_len; |
|
start_addr += free_len; |
|
len -= free_len; |
|
} |
|
# else |
|
if (munmap(start_addr, len) != 0) ABORT("munmap failed"); |
|
GC_unmapped_bytes += len; |
|
# endif |
} |
} |
|
|
|
|
Line 1370 void GC_remap(ptr_t start, word bytes) |
|
Line 1506 void GC_remap(ptr_t start, word bytes) |
|
word len = end_addr - start_addr; |
word len = end_addr - start_addr; |
ptr_t result; |
ptr_t result; |
|
|
if (-1 == zero_descr) zero_descr = open("/dev/zero", O_RDWR); |
# if defined(MSWIN32) || defined(MSWINCE) |
if (0 == start_addr) return; |
if (0 == start_addr) return; |
result = mmap(start_addr, len, PROT_READ | PROT_WRITE | OPT_PROT_EXEC, |
while (len != 0) { |
MAP_FIXED | MAP_PRIVATE, zero_descr, 0); |
MEMORY_BASIC_INFORMATION mem_info; |
if (result != start_addr) { |
GC_word alloc_len; |
ABORT("mmap remapping failed"); |
if (VirtualQuery(start_addr, &mem_info, sizeof(mem_info)) |
} |
!= sizeof(mem_info)) |
GC_unmapped_bytes -= len; |
ABORT("Weird VirtualQuery result"); |
|
alloc_len = (len < mem_info.RegionSize) ? len : mem_info.RegionSize; |
|
result = VirtualAlloc(start_addr, alloc_len, |
|
MEM_COMMIT, |
|
PAGE_EXECUTE_READWRITE); |
|
if (result != start_addr) { |
|
ABORT("VirtualAlloc remapping failed"); |
|
} |
|
GC_unmapped_bytes -= alloc_len; |
|
start_addr += alloc_len; |
|
len -= alloc_len; |
|
} |
|
# else |
|
if (-1 == zero_descr) zero_descr = open("/dev/zero", O_RDWR); |
|
if (0 == start_addr) return; |
|
result = mmap(start_addr, len, PROT_READ | PROT_WRITE | OPT_PROT_EXEC, |
|
MAP_FIXED | MAP_PRIVATE, zero_descr, 0); |
|
if (result != start_addr) { |
|
ABORT("mmap remapping failed"); |
|
} |
|
GC_unmapped_bytes -= len; |
|
# endif |
} |
} |
|
|
/* Two adjacent blocks have already been unmapped and are about to */ |
/* Two adjacent blocks have already been unmapped and are about to */ |
Line 1398 void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t sta |
|
Line 1555 void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t sta |
|
if (0 == start2_addr) end_addr = GC_unmap_end(start1, bytes1 + bytes2); |
if (0 == start2_addr) end_addr = GC_unmap_end(start1, bytes1 + bytes2); |
if (0 == start_addr) return; |
if (0 == start_addr) return; |
len = end_addr - start_addr; |
len = end_addr - start_addr; |
if (len != 0 && munmap(start_addr, len) != 0) ABORT("munmap failed"); |
# if defined(MSWIN32) || defined(MSWINCE) |
GC_unmapped_bytes += len; |
while (len != 0) { |
|
MEMORY_BASIC_INFORMATION mem_info; |
|
GC_word free_len; |
|
if (VirtualQuery(start_addr, &mem_info, sizeof(mem_info)) |
|
!= sizeof(mem_info)) |
|
ABORT("Weird VirtualQuery result"); |
|
free_len = (len < mem_info.RegionSize) ? len : mem_info.RegionSize; |
|
if (!VirtualFree(start_addr, free_len, MEM_DECOMMIT)) |
|
ABORT("VirtualFree failed"); |
|
GC_unmapped_bytes += free_len; |
|
start_addr += free_len; |
|
len -= free_len; |
|
} |
|
# else |
|
if (len != 0 && munmap(start_addr, len) != 0) ABORT("munmap failed"); |
|
GC_unmapped_bytes += len; |
|
# endif |
} |
} |
|
|
#endif /* USE_MUNMAP */ |
#endif /* USE_MUNMAP */ |
|
|
/* Routine for pushing any additional roots. In THREADS */ |
/* Routine for pushing any additional roots. In THREADS */ |
/* environment, this is also responsible for marking from */ |
/* environment, this is also responsible for marking from */ |
/* thread stacks. In the SRC_M3 case, it also handles */ |
/* thread stacks. */ |
/* global variables. */ |
|
#ifndef THREADS |
#ifndef THREADS |
void (*GC_push_other_roots)() = 0; |
void (*GC_push_other_roots)() = 0; |
#else /* THREADS */ |
#else /* THREADS */ |
Line 1434 PCR_ERes GC_push_old_obj(void *p, size_t size, PCR_Any |
|
Line 1606 PCR_ERes GC_push_old_obj(void *p, size_t size, PCR_Any |
|
} |
} |
|
|
|
|
void GC_default_push_other_roots() |
void GC_default_push_other_roots GC_PROTO((void)) |
{ |
{ |
/* Traverse data allocated by previous memory managers. */ |
/* Traverse data allocated by previous memory managers. */ |
{ |
{ |
Line 1462 void GC_default_push_other_roots() |
|
Line 1634 void GC_default_push_other_roots() |
|
--> misconfigured |
--> misconfigured |
# endif |
# endif |
|
|
|
void GC_push_thread_structures GC_PROTO((void)) |
|
{ |
|
/* Not our responsibibility. */ |
|
} |
|
|
extern void ThreadF__ProcessStacks(); |
extern void ThreadF__ProcessStacks(); |
|
|
|
|
{ |
{ |
word q = *p; |
word q = *p; |
|
|
if ((ptr_t)(q) >= GC_least_plausible_heap_addr |
GC_PUSH_ONE_STACK(q, p); |
&& (ptr_t)(q) < GC_greatest_plausible_heap_addr) { |
|
GC_push_one_checked(q,FALSE); |
|
} |
|
} |
} |
|
|
/* M3 set equivalent to RTHeap.TracedRefTypes */ |
/* M3 set equivalent to RTHeap.TracedRefTypes */ |
typedef struct { int elts[1]; } RefTypeSet; |
typedef struct { int elts[1]; } RefTypeSet; |
RefTypeSet GC_TracedRefTypes = {{0x1}}; |
RefTypeSet GC_TracedRefTypes = {{0x1}}; |
|
|
/* From finalize.c */ |
void GC_default_push_other_roots GC_PROTO((void)) |
extern void GC_push_finalizer_structures(); |
|
|
|
/* From stubborn.c: */ |
|
# ifdef STUBBORN_ALLOC |
|
extern GC_PTR * GC_changing_list_start; |
|
# endif |
|
|
|
|
|
void GC_default_push_other_roots() |
|
{ |
{ |
/* Use the M3 provided routine for finding static roots. */ |
/* Use the M3 provided routine for finding static roots. */ |
/* This is a bit dubious, since it presumes no C roots. */ |
/* This is a bit dubious, since it presumes no C roots. */ |
/* We handle the collector roots explicitly. */ |
/* We handle the collector roots explicitly in GC_push_roots */ |
{ |
RTMain__GlobalMapProc(GC_m3_push_root, 0, GC_TracedRefTypes); |
# ifdef STUBBORN_ALLOC |
|
GC_push_one(GC_changing_list_start); |
|
# endif |
|
GC_push_finalizer_structures(); |
|
RTMain__GlobalMapProc(GC_m3_push_root, 0, GC_TracedRefTypes); |
|
} |
|
if (GC_words_allocd > 0) { |
if (GC_words_allocd > 0) { |
ThreadF__ProcessStacks(GC_push_thread_stack); |
ThreadF__ProcessStacks(GC_push_thread_stack); |
} |
} |
Line 1519 void GC_default_push_other_roots() |
|
Line 1677 void GC_default_push_other_roots() |
|
|
|
# endif /* SRC_M3 */ |
# endif /* SRC_M3 */ |
|
|
# if defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \ |
# if defined(GC_SOLARIS_THREADS) || defined(GC_PTHREADS) || \ |
|| defined(IRIX_THREADS) || defined(LINUX_THREADS) \ |
defined(GC_WIN32_THREADS) |
|| defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS) |
|
|
|
extern void GC_push_all_stacks(); |
extern void GC_push_all_stacks(); |
|
|
void GC_default_push_other_roots() |
void GC_default_push_other_roots GC_PROTO((void)) |
{ |
{ |
GC_push_all_stacks(); |
GC_push_all_stacks(); |
} |
} |
|
|
# endif /* SOLARIS_THREADS || ... */ |
# endif /* GC_SOLARIS_THREADS || GC_PTHREADS */ |
|
|
void (*GC_push_other_roots)() = GC_default_push_other_roots; |
void (*GC_push_other_roots) GC_PROTO((void)) = GC_default_push_other_roots; |
|
|
#endif |
#endif /* THREADS */ |
|
|
/* |
/* |
* Routines for accessing dirty bits on virtual pages. |
* Routines for accessing dirty bits on virtual pages. |
* We plan to eventaually implement four strategies for doing so: |
* We plan to eventually implement four strategies for doing so: |
* DEFAULT_VDB: A simple dummy implementation that treats every page |
* DEFAULT_VDB: A simple dummy implementation that treats every page |
* as possibly dirty. This makes incremental collection |
* as possibly dirty. This makes incremental collection |
* useless, but the implementation is still correct. |
* useless, but the implementation is still correct. |
|
|
{ |
{ |
} |
} |
|
|
/* A call hints that h is about to be written. */ |
/* A call that: */ |
/* May speed up some dirty bit implementations. */ |
/* I) hints that [h, h+nblocks) is about to be written. */ |
|
/* II) guarantees that protection is removed. */ |
|
/* (I) may speed up some dirty bit implementations. */ |
|
/* (II) may be essential if we need to ensure that */ |
|
/* pointer-free system call buffers in the heap are */ |
|
/* not protected. */ |
/*ARGSUSED*/ |
/*ARGSUSED*/ |
void GC_write_hint(h) |
void GC_remove_protection(h, nblocks, is_ptrfree) |
struct hblk *h; |
struct hblk *h; |
|
word nblocks; |
|
GC_bool is_ptrfree; |
{ |
{ |
} |
} |
|
|
Line 1631 struct hblk *h; |
|
Line 1795 struct hblk *h; |
|
/* |
/* |
* This implementation maintains dirty bits itself by catching write |
* This implementation maintains dirty bits itself by catching write |
* faults and keeping track of them. We assume nobody else catches |
* faults and keeping track of them. We assume nobody else catches |
* SIGBUS or SIGSEGV. We assume no write faults occur in system calls |
* SIGBUS or SIGSEGV. We assume no write faults occur in system calls. |
* except as a result of a read system call. This means clients must |
* This means that clients must ensure that system calls don't write |
* either ensure that system calls do not touch the heap, or must |
* to the write-protected heap. Probably the best way to do this is to |
* provide their own wrappers analogous to the one for read. |
* ensure that system calls write at most to POINTERFREE objects in the |
|
* heap, and do even that only if we are on a platform on which those |
|
* are not protected. Another alternative is to wrap system calls |
|
* (see example for read below), but the current implementation holds |
|
* a lock across blocking calls, making it problematic for multithreaded |
|
* applications. |
* We assume the page size is a multiple of HBLKSIZE. |
* We assume the page size is a multiple of HBLKSIZE. |
* This implementation is currently SunOS 4.X and IRIX 5.X specific, though we |
* We prefer them to be the same. We avoid protecting POINTERFREE |
* tried to use portable code where easily possible. It is known |
* objects only if they are the same. |
* not to work under a number of other systems. |
|
*/ |
*/ |
|
|
# ifndef MSWIN32 |
# if !defined(MSWIN32) && !defined(MSWINCE) |
|
|
# include <sys/mman.h> |
# include <sys/mman.h> |
# include <signal.h> |
# include <signal.h> |
Line 1660 struct hblk *h; |
|
Line 1828 struct hblk *h; |
|
|
|
# else |
# else |
|
|
# include <signal.h> |
# ifndef MSWINCE |
|
# include <signal.h> |
|
# endif |
|
|
static DWORD protect_junk; |
static DWORD protect_junk; |
# define PROTECT(addr, len) \ |
# define PROTECT(addr, len) \ |
Line 1681 struct hblk *h; |
|
Line 1851 struct hblk *h; |
|
#if defined(SUNOS4) || defined(FREEBSD) |
#if defined(SUNOS4) || defined(FREEBSD) |
typedef void (* SIG_PF)(); |
typedef void (* SIG_PF)(); |
#endif |
#endif |
#if defined(SUNOS5SIGS) || defined(OSF1) || defined(LINUX) |
#if defined(SUNOS5SIGS) || defined(OSF1) || defined(LINUX) \ |
|
|| defined(MACOSX) || defined(HURD) |
# ifdef __STDC__ |
# ifdef __STDC__ |
typedef void (* SIG_PF)(int); |
typedef void (* SIG_PF)(int); |
# else |
# else |
Line 1693 struct hblk *h; |
|
Line 1864 struct hblk *h; |
|
# undef SIG_DFL |
# undef SIG_DFL |
# define SIG_DFL (LPTOP_LEVEL_EXCEPTION_FILTER) (-1) |
# define SIG_DFL (LPTOP_LEVEL_EXCEPTION_FILTER) (-1) |
#endif |
#endif |
|
#if defined(MSWINCE) |
|
typedef LONG (WINAPI *SIG_PF)(struct _EXCEPTION_POINTERS *); |
|
# undef SIG_DFL |
|
# define SIG_DFL (SIG_PF) (-1) |
|
#endif |
|
|
#if defined(IRIX5) || defined(OSF1) |
#if defined(IRIX5) || defined(OSF1) || defined(HURD) |
typedef void (* REAL_SIG_PF)(int, int, struct sigcontext *); |
typedef void (* REAL_SIG_PF)(int, int, struct sigcontext *); |
#endif |
#endif |
#if defined(SUNOS5SIGS) |
#if defined(SUNOS5SIGS) |
Line 1710 struct hblk *h; |
|
Line 1886 struct hblk *h; |
|
# endif |
# endif |
#endif |
#endif |
#if defined(LINUX) |
#if defined(LINUX) |
# include <linux/version.h> |
# if __GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 |
# if (LINUX_VERSION_CODE >= 0x20100) && !defined(M68K) || defined(ALPHA) || defined(IA64) |
|
typedef struct sigcontext s_c; |
typedef struct sigcontext s_c; |
# else |
# else /* glibc < 2.2 */ |
typedef struct sigcontext_struct s_c; |
# include <linux/version.h> |
# endif |
# if (LINUX_VERSION_CODE >= 0x20100) && !defined(M68K) || defined(ALPHA) || defined(ARM32) |
|
typedef struct sigcontext s_c; |
|
# else |
|
typedef struct sigcontext_struct s_c; |
|
# endif |
|
# endif /* glibc < 2.2 */ |
# if defined(ALPHA) || defined(M68K) |
# if defined(ALPHA) || defined(M68K) |
typedef void (* REAL_SIG_PF)(int, int, s_c *); |
typedef void (* REAL_SIG_PF)(int, int, s_c *); |
# else |
# else |
# if defined(IA64) |
# if defined(IA64) || defined(HP_PA) |
typedef void (* REAL_SIG_PF)(int, siginfo_t *, s_c *); |
typedef void (* REAL_SIG_PF)(int, siginfo_t *, s_c *); |
# else |
# else |
typedef void (* REAL_SIG_PF)(int, s_c); |
typedef void (* REAL_SIG_PF)(int, s_c); |
Line 1740 struct hblk *h; |
|
Line 1920 struct hblk *h; |
|
# endif /* !ALPHA */ |
# endif /* !ALPHA */ |
# endif |
# endif |
|
|
|
# if defined(MACOSX) /* Should also test for PowerPC? */ |
|
typedef void (* REAL_SIG_PF)(int, int, struct sigcontext *); |
|
|
|
/* Decodes the machine instruction which was responsible for the sending of the |
|
SIGBUS signal. Sadly this is the only way to find the faulting address because |
|
the signal handler doesn't get it directly from the kernel (although it is |
|
available on the Mach level, but droppped by the BSD personality before it |
|
calls our signal handler...) |
|
This code should be able to deal correctly with all PPCs starting from the |
|
601 up to and including the G4s (including Velocity Engine). */ |
|
#define EXTRACT_OP1(iw) (((iw) & 0xFC000000) >> 26) |
|
#define EXTRACT_OP2(iw) (((iw) & 0x000007FE) >> 1) |
|
#define EXTRACT_REGA(iw) (((iw) & 0x001F0000) >> 16) |
|
#define EXTRACT_REGB(iw) (((iw) & 0x03E00000) >> 21) |
|
#define EXTRACT_REGC(iw) (((iw) & 0x0000F800) >> 11) |
|
#define EXTRACT_DISP(iw) ((short *) &(iw))[1] |
|
|
|
static char *get_fault_addr(struct sigcontext *scp) |
|
{ |
|
unsigned int instr = *((unsigned int *) scp->sc_ir); |
|
unsigned int * regs = &((unsigned int *) scp->sc_regs)[2]; |
|
int disp = 0, tmp; |
|
unsigned int baseA = 0, baseB = 0; |
|
unsigned int addr, alignmask = 0xFFFFFFFF; |
|
|
|
#ifdef GC_DEBUG_DECODER |
|
GC_err_printf1("Instruction: 0x%lx\n", instr); |
|
GC_err_printf1("Opcode 1: d\n", (int)EXTRACT_OP1(instr)); |
|
#endif |
|
switch(EXTRACT_OP1(instr)) { |
|
case 38: /* stb */ |
|
case 39: /* stbu */ |
|
case 54: /* stfd */ |
|
case 55: /* stfdu */ |
|
case 52: /* stfs */ |
|
case 53: /* stfsu */ |
|
case 44: /* sth */ |
|
case 45: /* sthu */ |
|
case 47: /* stmw */ |
|
case 36: /* stw */ |
|
case 37: /* stwu */ |
|
tmp = EXTRACT_REGA(instr); |
|
if(tmp > 0) |
|
baseA = regs[tmp]; |
|
disp = EXTRACT_DISP(instr); |
|
break; |
|
case 31: |
|
#ifdef GC_DEBUG_DECODER |
|
GC_err_printf1("Opcode 2: %d\n", (int)EXTRACT_OP2(instr)); |
|
#endif |
|
switch(EXTRACT_OP2(instr)) { |
|
case 86: /* dcbf */ |
|
case 54: /* dcbst */ |
|
case 1014: /* dcbz */ |
|
case 247: /* stbux */ |
|
case 215: /* stbx */ |
|
case 759: /* stfdux */ |
|
case 727: /* stfdx */ |
|
case 983: /* stfiwx */ |
|
case 695: /* stfsux */ |
|
case 663: /* stfsx */ |
|
case 918: /* sthbrx */ |
|
case 439: /* sthux */ |
|
case 407: /* sthx */ |
|
case 661: /* stswx */ |
|
case 662: /* stwbrx */ |
|
case 150: /* stwcx. */ |
|
case 183: /* stwux */ |
|
case 151: /* stwx */ |
|
case 135: /* stvebx */ |
|
case 167: /* stvehx */ |
|
case 199: /* stvewx */ |
|
case 231: /* stvx */ |
|
case 487: /* stvxl */ |
|
tmp = EXTRACT_REGA(instr); |
|
if(tmp > 0) |
|
baseA = regs[tmp]; |
|
baseB = regs[EXTRACT_REGC(instr)]; |
|
/* determine Altivec alignment mask */ |
|
switch(EXTRACT_OP2(instr)) { |
|
case 167: /* stvehx */ |
|
alignmask = 0xFFFFFFFE; |
|
break; |
|
case 199: /* stvewx */ |
|
alignmask = 0xFFFFFFFC; |
|
break; |
|
case 231: /* stvx */ |
|
alignmask = 0xFFFFFFF0; |
|
break; |
|
case 487: /* stvxl */ |
|
alignmask = 0xFFFFFFF0; |
|
break; |
|
} |
|
break; |
|
case 725: /* stswi */ |
|
tmp = EXTRACT_REGA(instr); |
|
if(tmp > 0) |
|
baseA = regs[tmp]; |
|
break; |
|
default: /* ignore instruction */ |
|
#ifdef GC_DEBUG_DECODER |
|
GC_err_printf("Ignored by inner handler\n"); |
|
#endif |
|
return NULL; |
|
break; |
|
} |
|
break; |
|
default: /* ignore instruction */ |
|
#ifdef GC_DEBUG_DECODER |
|
GC_err_printf("Ignored by main handler\n"); |
|
#endif |
|
return NULL; |
|
break; |
|
} |
|
|
|
addr = (baseA + baseB) + disp; |
|
addr &= alignmask; |
|
#ifdef GC_DEBUG_DECODER |
|
GC_err_printf1("BaseA: %d\n", baseA); |
|
GC_err_printf1("BaseB: %d\n", baseB); |
|
GC_err_printf1("Disp: %d\n", disp); |
|
GC_err_printf1("Address: %d\n", addr); |
|
#endif |
|
return (char *)addr; |
|
} |
|
#endif /* MACOSX */ |
|
|
SIG_PF GC_old_bus_handler; |
SIG_PF GC_old_bus_handler; |
SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS_VIOLATION filter */ |
SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS_VIOLATION filter */ |
|
|
|
#ifdef THREADS |
|
/* We need to lock around the bitmap update in the write fault handler */ |
|
/* in order to avoid the risk of losing a bit. We do this with a */ |
|
/* test-and-set spin lock if we know how to do that. Otherwise we */ |
|
/* check whether we are already in the handler and use the dumb but */ |
|
/* safe fallback algorithm of setting all bits in the word. */ |
|
/* Contention should be very rare, so we do the minimum to handle it */ |
|
/* correctly. */ |
|
#ifdef GC_TEST_AND_SET_DEFINED |
|
static VOLATILE unsigned int fault_handler_lock = 0; |
|
void async_set_pht_entry_from_index(VOLATILE page_hash_table db, int index) { |
|
while (GC_test_and_set(&fault_handler_lock)) {} |
|
/* Could also revert to set_pht_entry_from_index_safe if initial */ |
|
/* GC_test_and_set fails. */ |
|
set_pht_entry_from_index(db, index); |
|
GC_clear(&fault_handler_lock); |
|
} |
|
#else /* !GC_TEST_AND_SET_DEFINED */ |
|
/* THIS IS INCORRECT! The dirty bit vector may be temporarily wrong, */ |
|
/* just before we notice the conflict and correct it. We may end up */ |
|
/* looking at it while it's wrong. But this requires contention */ |
|
/* exactly when a GC is triggered, which seems far less likely to */ |
|
/* fail than the old code, which had no reported failures. Thus we */ |
|
/* leave it this way while we think of something better, or support */ |
|
/* GC_test_and_set on the remaining platforms. */ |
|
static VOLATILE word currently_updating = 0; |
|
void async_set_pht_entry_from_index(VOLATILE page_hash_table db, int index) { |
|
unsigned int update_dummy; |
|
currently_updating = (word)(&update_dummy); |
|
set_pht_entry_from_index(db, index); |
|
/* If we get contention in the 10 or so instruction window here, */ |
|
/* and we get stopped by a GC between the two updates, we lose! */ |
|
if (currently_updating != (word)(&update_dummy)) { |
|
set_pht_entry_from_index_safe(db, index); |
|
/* We claim that if two threads concurrently try to update the */ |
|
/* dirty bit vector, the first one to execute UPDATE_START */ |
|
/* will see it changed when UPDATE_END is executed. (Note that */ |
|
/* &update_dummy must differ in two distinct threads.) It */ |
|
/* will then execute set_pht_entry_from_index_safe, thus */ |
|
/* returning us to a safe state, though not soon enough. */ |
|
} |
|
} |
|
#endif /* !GC_TEST_AND_SET_DEFINED */ |
|
#else /* !THREADS */ |
|
# define async_set_pht_entry_from_index(db, index) \ |
|
set_pht_entry_from_index(db, index) |
|
#endif /* !THREADS */ |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
# if defined (SUNOS4) || defined(FREEBSD) |
# if defined (SUNOS4) || defined(FREEBSD) |
void GC_write_fault_handler(sig, code, scp, addr) |
void GC_write_fault_handler(sig, code, scp, addr) |
Line 1760 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2115 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# define CODE_OK (code == BUS_PAGE_FAULT) |
# define CODE_OK (code == BUS_PAGE_FAULT) |
# endif |
# endif |
# endif |
# endif |
# if defined(IRIX5) || defined(OSF1) |
# if defined(IRIX5) || defined(OSF1) || defined(HURD) |
# include <errno.h> |
# include <errno.h> |
void GC_write_fault_handler(int sig, int code, struct sigcontext *scp) |
void GC_write_fault_handler(int sig, int code, struct sigcontext *scp) |
# define SIG_OK (sig == SIGSEGV) |
|
# ifdef OSF1 |
# ifdef OSF1 |
|
# define SIG_OK (sig == SIGSEGV) |
# define CODE_OK (code == 2 /* experimentally determined */) |
# define CODE_OK (code == 2 /* experimentally determined */) |
# endif |
# endif |
# ifdef IRIX5 |
# ifdef IRIX5 |
|
# define SIG_OK (sig == SIGSEGV) |
# define CODE_OK (code == EACCES) |
# define CODE_OK (code == EACCES) |
# endif |
# endif |
|
# ifdef HURD |
|
# define SIG_OK (sig == SIGBUS || sig == SIGSEGV) |
|
# define CODE_OK TRUE |
|
# endif |
# endif |
# endif |
# if defined(LINUX) |
# if defined(LINUX) |
# if defined(ALPHA) || defined(M68K) |
# if defined(ALPHA) || defined(M68K) |
void GC_write_fault_handler(int sig, int code, s_c * sc) |
void GC_write_fault_handler(int sig, int code, s_c * sc) |
# else |
# else |
# if defined(IA64) |
# if defined(IA64) || defined(HP_PA) |
void GC_write_fault_handler(int sig, siginfo_t * si, s_c * scp) |
void GC_write_fault_handler(int sig, siginfo_t * si, s_c * scp) |
# else |
# else |
void GC_write_fault_handler(int sig, s_c sc) |
# if defined(ARM32) |
|
void GC_write_fault_handler(int sig, int a2, int a3, int a4, s_c sc) |
|
# else |
|
void GC_write_fault_handler(int sig, s_c sc) |
|
# endif |
# endif |
# endif |
# endif |
# endif |
# define SIG_OK (sig == SIGSEGV) |
# define SIG_OK (sig == SIGSEGV) |
Line 1808 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2172 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# define CODE_OK (scp -> si_code == SEGV_ACCERR) |
# define CODE_OK (scp -> si_code == SEGV_ACCERR) |
# endif |
# endif |
# endif |
# endif |
# if defined(MSWIN32) |
|
|
# if defined(MACOSX) |
|
void GC_write_fault_handler(int sig, int code, struct sigcontext *scp) |
|
# define SIG_OK (sig == SIGBUS) |
|
# define CODE_OK (code == 0 /* experimentally determined */) |
|
# endif |
|
|
|
# if defined(MSWIN32) || defined(MSWINCE) |
LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info) |
LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info) |
# define SIG_OK (exc_info -> ExceptionRecord -> ExceptionCode == \ |
# define SIG_OK (exc_info -> ExceptionRecord -> ExceptionCode == \ |
EXCEPTION_ACCESS_VIOLATION) |
STATUS_ACCESS_VIOLATION) |
# define CODE_OK (exc_info -> ExceptionRecord -> ExceptionInformation[0] == 1) |
# define CODE_OK (exc_info -> ExceptionRecord -> ExceptionInformation[0] == 1) |
/* Write fault */ |
/* Write fault */ |
# endif |
# endif |
{ |
{ |
register unsigned i; |
register unsigned i; |
|
# if defined(HURD) |
|
char *addr = (char *) code; |
|
# endif |
# ifdef IRIX5 |
# ifdef IRIX5 |
char * addr = (char *) (size_t) (scp -> sc_badvaddr); |
char * addr = (char *) (size_t) (scp -> sc_badvaddr); |
# endif |
# endif |
Line 1833 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2207 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# if defined(M68K) |
# if defined(M68K) |
char * addr = NULL; |
char * addr = NULL; |
|
|
struct sigcontext *scp = (struct sigcontext *)(&sc); |
struct sigcontext *scp = (struct sigcontext *)(sc); |
|
|
int format = (scp->sc_formatvec >> 12) & 0xf; |
int format = (scp->sc_formatvec >> 12) & 0xf; |
unsigned long *framedata = (unsigned long *)(scp + 1); |
unsigned long *framedata = (unsigned long *)(scp + 1); |
Line 1845 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2219 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
} else if (format == 7) { |
} else if (format == 7) { |
/* 68040 */ |
/* 68040 */ |
ea = framedata[3]; |
ea = framedata[3]; |
|
if (framedata[1] & 0x08000000) { |
|
/* correct addr on misaligned access */ |
|
ea = (ea+4095)&(~4095); |
|
} |
} else if (format == 4) { |
} else if (format == 4) { |
/* 68060 */ |
/* 68060 */ |
ea = framedata[0]; |
ea = framedata[0]; |
Line 1858 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2236 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# ifdef ALPHA |
# ifdef ALPHA |
char * addr = get_fault_addr(sc); |
char * addr = get_fault_addr(sc); |
# else |
# else |
# ifdef IA64 |
# if defined(IA64) || defined(HP_PA) |
char * addr = si -> si_addr; |
char * addr = si -> si_addr; |
/* I believe this is claimed to work on all platforms for */ |
/* I believe this is claimed to work on all platforms for */ |
/* Linux 2.3.47 and later. Hopefully we don't have to */ |
/* Linux 2.3.47 and later. Hopefully we don't have to */ |
Line 1867 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2245 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# if defined(POWERPC) |
# if defined(POWERPC) |
char * addr = (char *) (sc.regs->dar); |
char * addr = (char *) (sc.regs->dar); |
# else |
# else |
--> architecture not supported |
# if defined(ARM32) |
|
char * addr = (char *)sc.fault_address; |
|
# else |
|
--> architecture not supported |
|
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# if defined(MSWIN32) |
# if defined(MACOSX) |
|
char * addr = get_fault_addr(scp); |
|
# endif |
|
# if defined(MSWIN32) || defined(MSWINCE) |
char * addr = (char *) (exc_info -> ExceptionRecord |
char * addr = (char *) (exc_info -> ExceptionRecord |
-> ExceptionInformation[1]); |
-> ExceptionInformation[1]); |
# define sig SIGSEGV |
# define sig SIGSEGV |
Line 1906 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2291 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
old_handler = GC_old_bus_handler; |
old_handler = GC_old_bus_handler; |
} |
} |
if (old_handler == SIG_DFL) { |
if (old_handler == SIG_DFL) { |
# ifndef MSWIN32 |
# if !defined(MSWIN32) && !defined(MSWINCE) |
GC_err_printf1("Segfault at 0x%lx\n", addr); |
GC_err_printf1("Segfault at 0x%lx\n", addr); |
ABORT("Unexpected bus error or segmentation fault"); |
ABORT("Unexpected bus error or segmentation fault"); |
# else |
# else |
Line 1925 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2310 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# if defined(ALPHA) || defined(M68K) |
# if defined(ALPHA) || defined(M68K) |
(*(REAL_SIG_PF)old_handler) (sig, code, sc); |
(*(REAL_SIG_PF)old_handler) (sig, code, sc); |
# else |
# else |
# if defined(IA64) |
# if defined(IA64) || defined(HP_PA) |
(*(REAL_SIG_PF)old_handler) (sig, si, scp); |
(*(REAL_SIG_PF)old_handler) (sig, si, scp); |
# else |
# else |
(*(REAL_SIG_PF)old_handler) (sig, sc); |
(*(REAL_SIG_PF)old_handler) (sig, sc); |
Line 1933 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2318 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
# endif |
# endif |
return; |
return; |
# endif |
# endif |
# if defined (IRIX5) || defined(OSF1) |
# if defined (IRIX5) || defined(OSF1) || defined(HURD) |
(*(REAL_SIG_PF)old_handler) (sig, code, scp); |
(*(REAL_SIG_PF)old_handler) (sig, code, scp); |
return; |
return; |
# endif |
# endif |
|
# ifdef MACOSX |
|
(*(REAL_SIG_PF)old_handler) (sig, code, scp); |
|
# endif |
# ifdef MSWIN32 |
# ifdef MSWIN32 |
return((*old_handler)(exc_info)); |
return((*old_handler)(exc_info)); |
# endif |
# endif |
} |
} |
} |
} |
|
UNPROTECT(h, GC_page_size); |
|
/* We need to make sure that no collection occurs between */ |
|
/* the UNPROTECT and the setting of the dirty bit. Otherwise */ |
|
/* a write by a third thread might go unnoticed. Reversing */ |
|
/* the order is just as bad, since we would end up unprotecting */ |
|
/* a page in a GC cycle during which it's not marked. */ |
|
/* Currently we do this by disabling the thread stopping */ |
|
/* signals while this handler is running. An alternative might */ |
|
/* be to record the fact that we're about to unprotect, or */ |
|
/* have just unprotected a page in the GC's thread structure, */ |
|
/* and then to have the thread stopping code set the dirty */ |
|
/* flag, if necessary. */ |
for (i = 0; i < divHBLKSZ(GC_page_size); i++) { |
for (i = 0; i < divHBLKSZ(GC_page_size); i++) { |
register int index = PHT_HASH(h+i); |
register int index = PHT_HASH(h+i); |
|
|
set_pht_entry_from_index(GC_dirty_pages, index); |
async_set_pht_entry_from_index(GC_dirty_pages, index); |
} |
} |
UNPROTECT(h, GC_page_size); |
# if defined(OSF1) |
# if defined(OSF1) || defined(LINUX) |
|
/* These reset the signal handler each time by default. */ |
/* These reset the signal handler each time by default. */ |
signal(SIGSEGV, (SIG_PF) GC_write_fault_handler); |
signal(SIGSEGV, (SIG_PF) GC_write_fault_handler); |
# endif |
# endif |
/* The write may not take place before dirty bits are read. */ |
/* The write may not take place before dirty bits are read. */ |
/* But then we'll fault again ... */ |
/* But then we'll fault again ... */ |
# ifdef MSWIN32 |
# if defined(MSWIN32) || defined(MSWINCE) |
return(EXCEPTION_CONTINUE_EXECUTION); |
return(EXCEPTION_CONTINUE_EXECUTION); |
# else |
# else |
return; |
return; |
# endif |
# endif |
} |
} |
#ifdef MSWIN32 |
#if defined(MSWIN32) || defined(MSWINCE) |
return EXCEPTION_CONTINUE_SEARCH; |
return EXCEPTION_CONTINUE_SEARCH; |
#else |
#else |
GC_err_printf1("Segfault at 0x%lx\n", addr); |
GC_err_printf1("Segfault at 0x%lx\n", addr); |
Line 1970 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
Line 2369 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
|
|
|
/* |
/* |
* We hold the allocation lock. We expect block h to be written |
* We hold the allocation lock. We expect block h to be written |
* shortly. |
* shortly. Ensure that all pages containing any part of the n hblks |
|
* starting at h are no longer protected. If is_ptrfree is false, |
|
* also ensure that they will subsequently appear to be dirty. |
*/ |
*/ |
void GC_write_hint(h) |
void GC_remove_protection(h, nblocks, is_ptrfree) |
struct hblk *h; |
struct hblk *h; |
|
word nblocks; |
|
GC_bool is_ptrfree; |
{ |
{ |
register struct hblk * h_trunc; |
struct hblk * h_trunc; /* Truncated to page boundary */ |
register unsigned i; |
struct hblk * h_end; /* Page boundary following block end */ |
register GC_bool found_clean; |
struct hblk * current; |
|
GC_bool found_clean; |
|
|
if (!GC_dirty_maintained) return; |
if (!GC_dirty_maintained) return; |
h_trunc = (struct hblk *)((word)h & ~(GC_page_size-1)); |
h_trunc = (struct hblk *)((word)h & ~(GC_page_size-1)); |
|
h_end = (struct hblk *)(((word)(h + nblocks) + GC_page_size-1) |
|
& ~(GC_page_size-1)); |
found_clean = FALSE; |
found_clean = FALSE; |
for (i = 0; i < divHBLKSZ(GC_page_size); i++) { |
for (current = h_trunc; current < h_end; ++current) { |
register int index = PHT_HASH(h_trunc+i); |
int index = PHT_HASH(current); |
|
|
if (!get_pht_entry_from_index(GC_dirty_pages, index)) { |
if (!is_ptrfree || current < h || current >= h + nblocks) { |
found_clean = TRUE; |
async_set_pht_entry_from_index(GC_dirty_pages, index); |
set_pht_entry_from_index(GC_dirty_pages, index); |
|
} |
} |
} |
} |
if (found_clean) { |
UNPROTECT(h_trunc, (ptr_t)h_end - (ptr_t)h_trunc); |
UNPROTECT(h_trunc, GC_page_size); |
|
} |
|
} |
} |
|
|
void GC_dirty_init() |
void GC_dirty_init() |
{ |
{ |
#if defined(SUNOS5SIGS) || defined(IRIX5) /* || defined(OSF1) */ |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(LINUX) || \ |
struct sigaction act, oldact; |
defined(OSF1) || defined(HURD) |
# ifdef IRIX5 |
struct sigaction act, oldact; |
|
/* We should probably specify SA_SIGINFO for Linux, and handle */ |
|
/* the different architectures more uniformly. */ |
|
# if defined(IRIX5) || defined(LINUX) || defined(OSF1) || defined(HURD) |
act.sa_flags = SA_RESTART; |
act.sa_flags = SA_RESTART; |
act.sa_handler = GC_write_fault_handler; |
act.sa_handler = (SIG_PF)GC_write_fault_handler; |
# else |
# else |
act.sa_flags = SA_RESTART | SA_SIGINFO; |
act.sa_flags = SA_RESTART | SA_SIGINFO; |
act.sa_sigaction = GC_write_fault_handler; |
act.sa_sigaction = GC_write_fault_handler; |
|
# endif |
|
(void)sigemptyset(&act.sa_mask); |
|
# ifdef SIG_SUSPEND |
|
/* Arrange to postpone SIG_SUSPEND while we're in a write fault */ |
|
/* handler. This effectively makes the handler atomic w.r.t. */ |
|
/* stopping the world for GC. */ |
|
(void)sigaddset(&act.sa_mask, SIG_SUSPEND); |
|
# endif /* SIG_SUSPEND */ |
|
# endif |
|
# if defined(MACOSX) |
|
struct sigaction act, oldact; |
|
|
|
act.sa_flags = SA_RESTART; |
|
act.sa_handler = GC_write_fault_handler; |
|
sigemptyset(&act.sa_mask); |
# endif |
# endif |
(void)sigemptyset(&act.sa_mask); |
|
#endif |
|
# ifdef PRINTSTATS |
# ifdef PRINTSTATS |
GC_printf0("Inititalizing mprotect virtual dirty bit implementation\n"); |
GC_printf0("Inititalizing mprotect virtual dirty bit implementation\n"); |
# endif |
# endif |
Line 2028 void GC_dirty_init() |
|
Line 2447 void GC_dirty_init() |
|
# endif |
# endif |
} |
} |
# endif |
# endif |
# if defined(OSF1) || defined(SUNOS4) || defined(LINUX) |
# if defined(SUNOS4) |
GC_old_segv_handler = signal(SIGSEGV, (SIG_PF)GC_write_fault_handler); |
GC_old_segv_handler = signal(SIGSEGV, (SIG_PF)GC_write_fault_handler); |
if (GC_old_segv_handler == SIG_IGN) { |
if (GC_old_segv_handler == SIG_IGN) { |
GC_err_printf0("Previously ignored segmentation violation!?"); |
GC_err_printf0("Previously ignored segmentation violation!?"); |
Line 2040 void GC_dirty_init() |
|
Line 2459 void GC_dirty_init() |
|
# endif |
# endif |
} |
} |
# endif |
# endif |
# if defined(SUNOS5SIGS) || defined(IRIX5) |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(LINUX) \ |
# if defined(IRIX_THREADS) || defined(IRIX_JDK_THREADS) |
|| defined(OSF1) || defined(HURD) |
|
/* SUNOS5SIGS includes HPUX */ |
|
# if defined(GC_IRIX_THREADS) |
sigaction(SIGSEGV, 0, &oldact); |
sigaction(SIGSEGV, 0, &oldact); |
sigaction(SIGSEGV, &act, 0); |
sigaction(SIGSEGV, &act, 0); |
# else |
# else |
sigaction(SIGSEGV, &act, &oldact); |
sigaction(SIGSEGV, &act, &oldact); |
# endif |
# endif |
# if defined(_sigargs) |
# if defined(_sigargs) || defined(HURD) || !defined(SA_SIGINFO) |
/* This is Irix 5.x, not 6.x. Irix 5.x does not have */ |
/* This is Irix 5.x, not 6.x. Irix 5.x does not have */ |
/* sa_sigaction. */ |
/* sa_sigaction. */ |
GC_old_segv_handler = oldact.sa_handler; |
GC_old_segv_handler = oldact.sa_handler; |
# else /* Irix 6.x or SUNOS5SIGS */ |
# else /* Irix 6.x or SUNOS5SIGS or LINUX */ |
if (oldact.sa_flags & SA_SIGINFO) { |
if (oldact.sa_flags & SA_SIGINFO) { |
GC_old_segv_handler = (SIG_PF)(oldact.sa_sigaction); |
GC_old_segv_handler = (SIG_PF)(oldact.sa_sigaction); |
} else { |
} else { |
Line 2067 void GC_dirty_init() |
|
Line 2488 void GC_dirty_init() |
|
GC_err_printf0("Replaced other SIGSEGV handler\n"); |
GC_err_printf0("Replaced other SIGSEGV handler\n"); |
# endif |
# endif |
} |
} |
# ifdef HPUX |
# endif |
sigaction(SIGBUS, &act, &oldact); |
# if defined(MACOSX) || defined(HPUX) || defined(LINUX) || defined(HURD) |
GC_old_bus_handler = oldact.sa_handler; |
sigaction(SIGBUS, &act, &oldact); |
if (GC_old_segv_handler != SIG_DFL) { |
GC_old_bus_handler = oldact.sa_handler; |
# ifdef PRINTSTATS |
if (GC_old_bus_handler == SIG_IGN) { |
GC_err_printf0("Replaced other SIGBUS handler\n"); |
GC_err_printf0("Previously ignored bus error!?"); |
# endif |
GC_old_bus_handler = SIG_DFL; |
} |
} |
# endif |
if (GC_old_bus_handler != SIG_DFL) { |
# endif |
# ifdef PRINTSTATS |
|
GC_err_printf0("Replaced other SIGBUS handler\n"); |
|
# endif |
|
} |
|
# endif /* MACOS || HPUX || LINUX */ |
# if defined(MSWIN32) |
# if defined(MSWIN32) |
GC_old_segv_handler = SetUnhandledExceptionFilter(GC_write_fault_handler); |
GC_old_segv_handler = SetUnhandledExceptionFilter(GC_write_fault_handler); |
if (GC_old_segv_handler != NULL) { |
if (GC_old_segv_handler != NULL) { |
Line 2089 void GC_dirty_init() |
|
Line 2514 void GC_dirty_init() |
|
# endif |
# endif |
} |
} |
|
|
|
int GC_incremental_protection_needs() |
|
{ |
|
if (GC_page_size == HBLKSIZE) { |
|
return GC_PROTECTS_POINTER_HEAP; |
|
} else { |
|
return GC_PROTECTS_POINTER_HEAP | GC_PROTECTS_PTRFREE_HEAP; |
|
} |
|
} |
|
|
|
#define HAVE_INCREMENTAL_PROTECTION_NEEDS |
|
|
|
#define IS_PTRFREE(hhdr) ((hhdr)->hb_descr == 0) |
|
|
|
#define PAGE_ALIGNED(x) !((word)(x) & (GC_page_size - 1)) |
void GC_protect_heap() |
void GC_protect_heap() |
{ |
{ |
ptr_t start; |
ptr_t start; |
word len; |
word len; |
|
struct hblk * current; |
|
struct hblk * current_start; /* Start of block to be protected. */ |
|
struct hblk * limit; |
unsigned i; |
unsigned i; |
|
GC_bool protect_all = |
|
(0 != (GC_incremental_protection_needs() & GC_PROTECTS_PTRFREE_HEAP)); |
for (i = 0; i < GC_n_heap_sects; i++) { |
for (i = 0; i < GC_n_heap_sects; i++) { |
start = GC_heap_sects[i].hs_start; |
start = GC_heap_sects[i].hs_start; |
len = GC_heap_sects[i].hs_bytes; |
len = GC_heap_sects[i].hs_bytes; |
PROTECT(start, len); |
if (protect_all) { |
|
PROTECT(start, len); |
|
} else { |
|
GC_ASSERT(PAGE_ALIGNED(len)) |
|
GC_ASSERT(PAGE_ALIGNED(start)) |
|
current_start = current = (struct hblk *)start; |
|
limit = (struct hblk *)(start + len); |
|
while (current < limit) { |
|
hdr * hhdr; |
|
word nhblks; |
|
GC_bool is_ptrfree; |
|
|
|
GC_ASSERT(PAGE_ALIGNED(current)); |
|
GET_HDR(current, hhdr); |
|
if (IS_FORWARDING_ADDR_OR_NIL(hhdr)) { |
|
/* This can happen only if we're at the beginning of a */ |
|
/* heap segment, and a block spans heap segments. */ |
|
/* We will handle that block as part of the preceding */ |
|
/* segment. */ |
|
GC_ASSERT(current_start == current); |
|
current_start = ++current; |
|
continue; |
|
} |
|
if (HBLK_IS_FREE(hhdr)) { |
|
GC_ASSERT(PAGE_ALIGNED(hhdr -> hb_sz)); |
|
nhblks = divHBLKSZ(hhdr -> hb_sz); |
|
is_ptrfree = TRUE; /* dirty on alloc */ |
|
} else { |
|
nhblks = OBJ_SZ_TO_BLOCKS(hhdr -> hb_sz); |
|
is_ptrfree = IS_PTRFREE(hhdr); |
|
} |
|
if (is_ptrfree) { |
|
if (current_start < current) { |
|
PROTECT(current_start, (ptr_t)current - (ptr_t)current_start); |
|
} |
|
current_start = (current += nhblks); |
|
} else { |
|
current += nhblks; |
|
} |
|
} |
|
if (current_start < current) { |
|
PROTECT(current_start, (ptr_t)current - (ptr_t)current_start); |
|
} |
|
} |
} |
} |
} |
} |
|
|
Line 2129 struct hblk * h; |
|
Line 2613 struct hblk * h; |
|
* happens to work. |
* happens to work. |
* On other systems, SET_LOCK_HOLDER and friends must be suitably defined. |
* On other systems, SET_LOCK_HOLDER and friends must be suitably defined. |
*/ |
*/ |
|
|
|
static GC_bool syscall_acquired_lock = FALSE; /* Protected by GC lock. */ |
|
|
void GC_begin_syscall() |
void GC_begin_syscall() |
{ |
{ |
if (!I_HOLD_LOCK()) LOCK(); |
if (!I_HOLD_LOCK()) { |
|
LOCK(); |
|
syscall_acquired_lock = TRUE; |
|
} |
} |
} |
|
|
void GC_end_syscall() |
void GC_end_syscall() |
{ |
{ |
if (!I_HOLD_LOCK()) UNLOCK(); |
if (syscall_acquired_lock) { |
|
syscall_acquired_lock = FALSE; |
|
UNLOCK(); |
|
} |
} |
} |
|
|
void GC_unprotect_range(addr, len) |
void GC_unprotect_range(addr, len) |
|
|
register struct hblk *h; |
register struct hblk *h; |
ptr_t obj_start; |
ptr_t obj_start; |
|
|
if (!GC_incremental) return; |
if (!GC_dirty_maintained) return; |
obj_start = GC_base(addr); |
obj_start = GC_base(addr); |
if (obj_start == 0) return; |
if (obj_start == 0) return; |
if (GC_base(addr + len - 1) != obj_start) { |
if (GC_base(addr + len - 1) != obj_start) { |
|
|
for (h = start_block; h <= end_block; h++) { |
for (h = start_block; h <= end_block; h++) { |
register word index = PHT_HASH(h); |
register word index = PHT_HASH(h); |
|
|
set_pht_entry_from_index(GC_dirty_pages, index); |
async_set_pht_entry_from_index(GC_dirty_pages, index); |
} |
} |
UNPROTECT(start_block, |
UNPROTECT(start_block, |
((ptr_t)end_block - (ptr_t)start_block) + HBLKSIZE); |
((ptr_t)end_block - (ptr_t)start_block) + HBLKSIZE); |
} |
} |
|
|
#if !defined(MSWIN32) && !defined(LINUX_THREADS) |
#if 0 |
/* Replacement for UNIX system call. */ |
|
/* Other calls that write to the heap */ |
/* We no longer wrap read by default, since that was causing too many */ |
/* should be handled similarly. */ |
/* problems. It is preferred that the client instead avoids writing */ |
|
/* to the write-protected heap with a system call. */ |
|
/* This still serves as sample code if you do want to wrap system calls.*/ |
|
|
|
#if !defined(MSWIN32) && !defined(MSWINCE) && !defined(GC_USE_LD_WRAP) |
|
/* Replacement for UNIX system call. */ |
|
/* Other calls that write to the heap should be handled similarly. */ |
|
/* Note that this doesn't work well for blocking reads: It will hold */ |
|
/* the allocation lock for the entire duration of the call. Multithreaded */ |
|
/* clients should really ensure that it won't block, either by setting */ |
|
/* the descriptor nonblocking, or by calling select or poll first, to */ |
|
/* make sure that input is available. */ |
|
/* Another, preferred alternative is to ensure that system calls never */ |
|
/* write to the protected heap (see above). */ |
# if defined(__STDC__) && !defined(SUNOS4) |
# if defined(__STDC__) && !defined(SUNOS4) |
# include <unistd.h> |
# include <unistd.h> |
# include <sys/uio.h> |
# include <sys/uio.h> |
|
|
|
|
GC_begin_syscall(); |
GC_begin_syscall(); |
GC_unprotect_range(buf, (word)nbyte); |
GC_unprotect_range(buf, (word)nbyte); |
# if defined(IRIX5) || defined(LINUX_THREADS) |
# if defined(IRIX5) || defined(GC_LINUX_THREADS) |
/* Indirect system call may not always be easily available. */ |
/* Indirect system call may not always be easily available. */ |
/* We could call _read, but that would interfere with the */ |
/* We could call _read, but that would interfere with the */ |
/* libpthread interception of read. */ |
/* libpthread interception of read. */ |
|
|
result = readv(fd, &iov, 1); |
result = readv(fd, &iov, 1); |
} |
} |
# else |
# else |
result = syscall(SYS_read, fd, buf, nbyte); |
# if defined(HURD) |
|
result = __read(fd, buf, nbyte); |
|
# else |
|
/* The two zero args at the end of this list are because one |
|
IA-64 syscall() implementation actually requires six args |
|
to be passed, even though they aren't always used. */ |
|
result = syscall(SYS_read, fd, buf, nbyte, 0, 0); |
|
# endif /* !HURD */ |
# endif |
# endif |
GC_end_syscall(); |
GC_end_syscall(); |
return(result); |
return(result); |
} |
} |
#endif /* !MSWIN32 && !LINUX */ |
#endif /* !MSWIN32 && !MSWINCE && !GC_LINUX_THREADS */ |
|
|
#ifdef USE_LD_WRAP |
#if defined(GC_USE_LD_WRAP) && !defined(THREADS) |
/* We use the GNU ld call wrapping facility. */ |
/* We use the GNU ld call wrapping facility. */ |
/* This requires that the linker be invoked with "--wrap read". */ |
/* This requires that the linker be invoked with "--wrap read". */ |
/* This can be done by passing -Wl,"--wrap read" to gcc. */ |
/* This can be done by passing -Wl,"--wrap read" to gcc. */ |
|
|
/* actually calls. */ |
/* actually calls. */ |
#endif |
#endif |
|
|
|
#endif /* 0 */ |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
GC_bool GC_page_was_ever_dirty(h) |
GC_bool GC_page_was_ever_dirty(h) |
struct hblk *h; |
struct hblk *h; |
|
|
{ |
{ |
} |
} |
|
|
|
# else /* !MPROTECT_VDB */ |
|
|
|
# ifdef GC_USE_LD_WRAP |
|
ssize_t __wrap_read(int fd, void *buf, size_t nbyte) |
|
{ return __real_read(fd, buf, nbyte); } |
|
# endif |
|
|
# endif /* MPROTECT_VDB */ |
# endif /* MPROTECT_VDB */ |
|
|
# ifdef PROC_VDB |
# ifdef PROC_VDB |
|
|
#include <sys/syscall.h> |
#include <sys/syscall.h> |
#include <sys/procfs.h> |
#include <sys/procfs.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
#include <fcntl.h> |
|
|
|
#define INITIAL_BUF_SZ 4096 |
#define INITIAL_BUF_SZ 4096 |
word GC_proc_buf_size = INITIAL_BUF_SZ; |
word GC_proc_buf_size = INITIAL_BUF_SZ; |
char *GC_proc_buf; |
char *GC_proc_buf; |
|
|
#ifdef SOLARIS_THREADS |
#ifdef GC_SOLARIS_THREADS |
/* We don't have exact sp values for threads. So we count on */ |
/* We don't have exact sp values for threads. So we count on */ |
/* occasionally declaring stack pages to be fresh. Thus we */ |
/* occasionally declaring stack pages to be fresh. Thus we */ |
/* need a real implementation of GC_is_fresh. We can't clear */ |
/* need a real implementation of GC_is_fresh. We can't clear */ |
Line 2331 void GC_dirty_init() |
|
Line 2851 void GC_dirty_init() |
|
ABORT("/proc ioctl failed"); |
ABORT("/proc ioctl failed"); |
} |
} |
GC_proc_buf = GC_scratch_alloc(GC_proc_buf_size); |
GC_proc_buf = GC_scratch_alloc(GC_proc_buf_size); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
GC_fresh_pages = (struct hblk **) |
GC_fresh_pages = (struct hblk **) |
GC_scratch_alloc(MAX_FRESH_PAGES * sizeof (struct hblk *)); |
GC_scratch_alloc(MAX_FRESH_PAGES * sizeof (struct hblk *)); |
if (GC_fresh_pages == 0) { |
if (GC_fresh_pages == 0) { |
Line 2344 void GC_dirty_init() |
|
Line 2864 void GC_dirty_init() |
|
|
|
/* Ignore write hints. They don't help us here. */ |
/* Ignore write hints. They don't help us here. */ |
/*ARGSUSED*/ |
/*ARGSUSED*/ |
void GC_write_hint(h) |
void GC_remove_protection(h, nblocks, is_ptrfree) |
struct hblk *h; |
struct hblk *h; |
|
word nblocks; |
|
GC_bool is_ptrfree; |
{ |
{ |
} |
} |
|
|
#ifdef SOLARIS_THREADS |
#ifdef GC_SOLARIS_THREADS |
# define READ(fd,buf,nbytes) syscall(SYS_read, fd, buf, nbytes) |
# define READ(fd,buf,nbytes) syscall(SYS_read, fd, buf, nbytes) |
#else |
#else |
# define READ(fd,buf,nbytes) read(fd, buf, nbytes) |
# define READ(fd,buf,nbytes) read(fd, buf, nbytes) |
|
|
/* Punt: */ |
/* Punt: */ |
memset(GC_grungy_pages, 0xff, sizeof (page_hash_table)); |
memset(GC_grungy_pages, 0xff, sizeof (page_hash_table)); |
memset(GC_written_pages, 0xff, sizeof(page_hash_table)); |
memset(GC_written_pages, 0xff, sizeof(page_hash_table)); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
BZERO(GC_fresh_pages, |
BZERO(GC_fresh_pages, |
MAX_FRESH_PAGES * sizeof (struct hblk *)); |
MAX_FRESH_PAGES * sizeof (struct hblk *)); |
# endif |
# endif |
|
|
register word index = PHT_HASH(h); |
register word index = PHT_HASH(h); |
|
|
set_pht_entry_from_index(GC_grungy_pages, index); |
set_pht_entry_from_index(GC_grungy_pages, index); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
{ |
{ |
register int slot = FRESH_PAGE_SLOT(h); |
register int slot = FRESH_PAGE_SLOT(h); |
|
|
|
|
} |
} |
/* Update GC_written_pages. */ |
/* Update GC_written_pages. */ |
GC_or_pages(GC_written_pages, GC_grungy_pages); |
GC_or_pages(GC_written_pages, GC_grungy_pages); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
/* Make sure that old stacks are considered completely clean */ |
/* Make sure that old stacks are considered completely clean */ |
/* unless written again. */ |
/* unless written again. */ |
GC_old_stacks_are_fresh(); |
GC_old_stacks_are_fresh(); |
Line 2452 struct hblk *h; |
|
Line 2974 struct hblk *h; |
|
register GC_bool result; |
register GC_bool result; |
|
|
result = get_pht_entry_from_index(GC_grungy_pages, index); |
result = get_pht_entry_from_index(GC_grungy_pages, index); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
if (result && PAGE_IS_FRESH(h)) result = FALSE; |
if (result && PAGE_IS_FRESH(h)) result = FALSE; |
/* This happens only if page was declared fresh since */ |
/* This happens only if page was declared fresh since */ |
/* the read_dirty call, e.g. because it's in an unused */ |
/* the read_dirty call, e.g. because it's in an unused */ |
Line 2470 struct hblk *h; |
|
Line 2992 struct hblk *h; |
|
register GC_bool result; |
register GC_bool result; |
|
|
result = get_pht_entry_from_index(GC_written_pages, index); |
result = get_pht_entry_from_index(GC_written_pages, index); |
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
if (result && PAGE_IS_FRESH(h)) result = FALSE; |
if (result && PAGE_IS_FRESH(h)) result = FALSE; |
# endif |
# endif |
return(result); |
return(result); |
|
|
|
|
register word index; |
register word index; |
|
|
# ifdef SOLARIS_THREADS |
# ifdef GC_SOLARIS_THREADS |
register word i; |
register word i; |
|
|
if (GC_fresh_pages != 0) { |
if (GC_fresh_pages != 0) { |
Line 2553 struct hblk *h; |
|
Line 3075 struct hblk *h; |
|
} |
} |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
void GC_write_hint(h) |
void GC_remove_protection(h, nblocks, is_ptrfree) |
struct hblk *h; |
struct hblk *h; |
|
word nblocks; |
|
GC_bool is_ptrfree; |
{ |
{ |
PCR_VD_WriteProtectDisable(h, HBLKSIZE); |
PCR_VD_WriteProtectDisable(h, nblocks*HBLKSIZE); |
PCR_VD_WriteProtectEnable(h, HBLKSIZE); |
PCR_VD_WriteProtectEnable(h, nblocks*HBLKSIZE); |
} |
} |
|
|
# endif /* PCR_VDB */ |
# endif /* PCR_VDB */ |
|
|
|
# ifndef HAVE_INCREMENTAL_PROTECTION_NEEDS |
|
int GC_incremental_protection_needs() |
|
{ |
|
return GC_PROTECTS_NONE; |
|
} |
|
# endif /* !HAVE_INCREMENTAL_PROTECTION_NEEDS */ |
|
|
/* |
/* |
* Call stack save code for debugging. |
* Call stack save code for debugging. |
* Should probably be in mach_dep.c, but that requires reorganization. |
* Should probably be in mach_dep.c, but that requires reorganization. |
*/ |
*/ |
#if defined(SPARC) && !defined(LINUX) |
|
# if defined(SUNOS4) |
/* I suspect the following works for most X86 *nix variants, so */ |
# include <machine/frame.h> |
/* long as the frame pointer is explicitly stored. In the case of gcc, */ |
# else |
/* compiler flags (e.g. -fomit-frame-pointer) determine whether it is. */ |
# if defined (DRSNX) |
#if defined(I386) && defined(LINUX) && defined(SAVE_CALL_CHAIN) |
# include <sys/sparc/frame.h> |
# include <features.h> |
# else |
|
# if defined(OPENBSD) |
struct frame { |
# include <frame.h> |
struct frame *fr_savfp; |
# else |
long fr_savpc; |
# include <sys/frame.h> |
long fr_arg[NARGS]; /* All the arguments go here. */ |
# endif |
}; |
# endif |
#endif |
# endif |
|
# if NARGS > 6 |
#if defined(SPARC) |
|
# if defined(LINUX) |
|
# include <features.h> |
|
|
|
struct frame { |
|
long fr_local[8]; |
|
long fr_arg[6]; |
|
struct frame *fr_savfp; |
|
long fr_savpc; |
|
# ifndef __arch64__ |
|
char *fr_stret; |
|
# endif |
|
long fr_argd[6]; |
|
long fr_argx[0]; |
|
}; |
|
# else |
|
# if defined(SUNOS4) |
|
# include <machine/frame.h> |
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# else |
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# if defined (DRSNX) |
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# include <sys/sparc/frame.h> |
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# else |
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# if defined(OPENBSD) || defined(NETBSD) |
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# include <frame.h> |
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# else |
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# include <sys/frame.h> |
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# endif |
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# endif |
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# endif |
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# endif |
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# if NARGS > 6 |
--> We only know how to to get the first 6 arguments |
--> We only know how to to get the first 6 arguments |
# endif |
# endif |
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#endif /* SPARC */ |
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#ifdef SAVE_CALL_CHAIN |
#ifdef NEED_CALLINFO |
/* Fill in the pc and argument information for up to NFRAMES of my */ |
/* Fill in the pc and argument information for up to NFRAMES of my */ |
/* callers. Ignore my frame and my callers frame. */ |
/* callers. Ignore my frame and my callers frame. */ |
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#ifdef OPENBSD |
#ifdef LINUX |
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# include <features.h> |
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# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2 |
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# define HAVE_BUILTIN_BACKTRACE |
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# ifdef IA64 |
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# define BUILTIN_BACKTRACE_BROKEN |
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# endif |
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# endif |
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#endif |
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#include <execinfo.h> |
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#ifdef LINUX |
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# include <unistd.h> |
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#endif |
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#endif /* NEED_CALLINFO */ |
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#ifdef SAVE_CALL_CHAIN |
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#if NARGS == 0 && NFRAMES % 2 == 0 /* No padding */ \ |
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&& defined(HAVE_BUILTIN_BACKTRACE) |
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void GC_save_callers (info) |
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struct callinfo info[NFRAMES]; |
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{ |
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void * tmp_info[NFRAMES + 1]; |
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int npcs, i; |
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# define IGNORE_FRAMES 1 |
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/* We retrieve NFRAMES+1 pc values, but discard the first, since it */ |
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/* points to our own frame. */ |
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GC_ASSERT(sizeof(struct callinfo) == sizeof(void *)); |
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npcs = backtrace((void **)tmp_info, NFRAMES + IGNORE_FRAMES); |
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BCOPY(tmp_info+IGNORE_FRAMES, info, (npcs - IGNORE_FRAMES) * sizeof(void *)); |
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for (i = npcs - IGNORE_FRAMES; i < NFRAMES; ++i) info[i].ci_pc = 0; |
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} |
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#else /* No builtin backtrace; do it ourselves */ |
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#if (defined(OPENBSD) || defined(NETBSD)) && defined(SPARC) |
# define FR_SAVFP fr_fp |
# define FR_SAVFP fr_fp |
# define FR_SAVPC fr_pc |
# define FR_SAVPC fr_pc |
#else |
#else |
Line 2596 struct hblk *h; |
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Line 3197 struct hblk *h; |
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# define FR_SAVPC fr_savpc |
# define FR_SAVPC fr_savpc |
#endif |
#endif |
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#if defined(SPARC) && (defined(__arch64__) || defined(__sparcv9)) |
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# define BIAS 2047 |
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#else |
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# define BIAS 0 |
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#endif |
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void GC_save_callers (info) |
void GC_save_callers (info) |
struct callinfo info[NFRAMES]; |
struct callinfo info[NFRAMES]; |
{ |
{ |
struct frame *frame; |
struct frame *frame; |
struct frame *fp; |
struct frame *fp; |
int nframes = 0; |
int nframes = 0; |
word GC_save_regs_in_stack(); |
# ifdef I386 |
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/* We assume this is turned on only with gcc as the compiler. */ |
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asm("movl %%ebp,%0" : "=r"(frame)); |
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fp = frame; |
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# else |
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word GC_save_regs_in_stack(); |
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frame = (struct frame *) GC_save_regs_in_stack (); |
frame = (struct frame *) GC_save_regs_in_stack (); |
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fp = (struct frame *)((long) frame -> FR_SAVFP + BIAS); |
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#endif |
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for (fp = frame -> FR_SAVFP; fp != 0 && nframes < NFRAMES; |
for (; (!(fp HOTTER_THAN frame) && !(GC_stackbottom HOTTER_THAN (ptr_t)fp) |
fp = fp -> FR_SAVFP, nframes++) { |
&& (nframes < NFRAMES)); |
|
fp = (struct frame *)((long) fp -> FR_SAVFP + BIAS), nframes++) { |
register int i; |
register int i; |
|
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info[nframes].ci_pc = fp->FR_SAVPC; |
info[nframes].ci_pc = fp->FR_SAVPC; |
for (i = 0; i < NARGS; i++) { |
# if NARGS > 0 |
info[nframes].ci_arg[i] = ~(fp->fr_arg[i]); |
for (i = 0; i < NARGS; i++) { |
} |
info[nframes].ci_arg[i] = ~(fp->fr_arg[i]); |
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} |
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# endif /* NARGS > 0 */ |
} |
} |
if (nframes < NFRAMES) info[nframes].ci_pc = 0; |
if (nframes < NFRAMES) info[nframes].ci_pc = 0; |
} |
} |
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|
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#endif /* No builtin backtrace */ |
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#endif /* SAVE_CALL_CHAIN */ |
#endif /* SAVE_CALL_CHAIN */ |
#endif /* SPARC */ |
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#ifdef NEED_CALLINFO |
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/* Print info to stderr. We do NOT hold the allocation lock */ |
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void GC_print_callers (info) |
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struct callinfo info[NFRAMES]; |
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{ |
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register int i; |
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static int reentry_count = 0; |
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|
|
LOCK(); |
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++reentry_count; |
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UNLOCK(); |
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|
|
# if NFRAMES == 1 |
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GC_err_printf0("\tCaller at allocation:\n"); |
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# else |
|
GC_err_printf0("\tCall chain at allocation:\n"); |
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# endif |
|
for (i = 0; i < NFRAMES; i++) { |
|
if (info[i].ci_pc == 0) break; |
|
# if NARGS > 0 |
|
{ |
|
int j; |
|
|
|
GC_err_printf0("\t\targs: "); |
|
for (j = 0; j < NARGS; j++) { |
|
if (j != 0) GC_err_printf0(", "); |
|
GC_err_printf2("%d (0x%X)", ~(info[i].ci_arg[j]), |
|
~(info[i].ci_arg[j])); |
|
} |
|
GC_err_printf0("\n"); |
|
} |
|
# endif |
|
if (reentry_count > 1) { |
|
/* We were called during an allocation during */ |
|
/* a previous GC_print_callers call; punt. */ |
|
GC_err_printf1("\t\t##PC##= 0x%lx\n", info[i].ci_pc); |
|
continue; |
|
} |
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{ |
|
# ifdef LINUX |
|
FILE *pipe; |
|
# endif |
|
# if defined(HAVE_BUILTIN_BACKTRACE) && \ |
|
!defined(BUILTIN_BACKTRACE_BROKEN) |
|
char **sym_name = |
|
backtrace_symbols((void **)(&(info[i].ci_pc)), 1); |
|
char *name = sym_name[0]; |
|
GC_bool found_it = (strchr(name, '(') != 0); |
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# else |
|
char buf[40]; |
|
char *name = buf; |
|
GC_bool fount_it = FALSE: |
|
sprintf(buf, "##PC##= 0x%lx", info[i].ci_pc); |
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# endif |
|
# ifdef LINUX |
|
if (!found_it) { |
|
# define EXE_SZ 100 |
|
static char exe_name[EXE_SZ]; |
|
# define CMD_SZ 200 |
|
char cmd_buf[CMD_SZ]; |
|
# define RESULT_SZ 200 |
|
static char result_buf[RESULT_SZ]; |
|
size_t result_len; |
|
static GC_bool found_exe_name = FALSE; |
|
static GC_bool will_fail = FALSE; |
|
int ret_code; |
|
/* Unfortunately, this is the common case for the */ |
|
/* main executable. */ |
|
/* Try to get it via a hairy and expensive scheme. */ |
|
/* First we get the name of the executable: */ |
|
if (will_fail) goto out; |
|
if (!found_exe_name) { |
|
ret_code = readlink("/proc/self/exe", exe_name, EXE_SZ); |
|
if (ret_code < 0 || ret_code >= EXE_SZ |
|
|| exe_name[0] != '/') { |
|
will_fail = TRUE; /* Dont try again. */ |
|
goto out; |
|
} |
|
exe_name[ret_code] = '\0'; |
|
found_exe_name = TRUE; |
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} |
|
/* Then we use popen to start addr2line -e <exe> <addr> */ |
|
/* There are faster ways to do this, but hopefully this */ |
|
/* isn't time critical. */ |
|
sprintf(cmd_buf, "/usr/bin/addr2line -e %s 0x%lx", exe_name, |
|
(unsigned long)info[i].ci_pc); |
|
pipe = popen(cmd_buf, "r"); |
|
if (pipe < 0 || fgets(result_buf, RESULT_SZ, pipe) == 0) { |
|
will_fail = TRUE; |
|
goto out; |
|
} |
|
result_len = strlen(result_buf); |
|
if (result_buf[result_len - 1] == '\n') --result_len; |
|
if (result_buf[0] == '?' |
|
|| result_buf[result_len-2] == ':' |
|
&& result_buf[result_len-1] == '0') |
|
goto out; |
|
if (result_len < RESULT_SZ - 25) { |
|
/* Add in hex address */ |
|
sprintf(result_buf + result_len, " [0x%lx]", |
|
(unsigned long)info[i].ci_pc); |
|
} |
|
name = result_buf; |
|
pclose(pipe); |
|
out: |
|
} |
|
# endif /* LINUX */ |
|
GC_err_printf1("\t\t%s\n", name); |
|
free(sym_name); /* May call GC_free; that's OK */ |
|
} |
|
} |
|
LOCK(); |
|
--reentry_count; |
|
UNLOCK(); |
|
} |
|
|
|
#endif /* NEED_CALLINFO */ |
|
|
|
#if defined(LINUX) && defined(__ELF__) && \ |
|
(!defined(SMALL_CONFIG) || defined(USE_PROC_FOR_LIBRARIES)) |
|
#ifdef GC_USE_LD_WRAP |
|
# define READ __real_read |
|
#else |
|
# define READ read |
|
#endif |
|
|
|
|
|
/* Repeatedly perform a read call until the buffer is filled or */ |
|
/* we encounter EOF. */ |
|
ssize_t GC_repeat_read(int fd, char *buf, size_t count) |
|
{ |
|
ssize_t num_read = 0; |
|
ssize_t result; |
|
|
|
while (num_read < count) { |
|
result = READ(fd, buf + num_read, count - num_read); |
|
if (result < 0) return result; |
|
if (result == 0) break; |
|
num_read += result; |
|
} |
|
return num_read; |
|
} |
|
#endif /* LINUX && ... */ |
|
|
|
|
|
#if defined(LINUX) && defined(__ELF__) && !defined(SMALL_CONFIG) |
|
|
|
/* Dump /proc/self/maps to GC_stderr, to enable looking up names for |
|
addresses in FIND_LEAK output. */ |
|
|
|
void GC_print_address_map() |
|
{ |
|
int f; |
|
int result; |
|
char maps_temp[32768]; |
|
GC_err_printf0("---------- Begin address map ----------\n"); |
|
f = open("/proc/self/maps", O_RDONLY); |
|
if (-1 == f) ABORT("Couldn't open /proc/self/maps"); |
|
do { |
|
result = GC_repeat_read(f, maps_temp, sizeof(maps_temp)); |
|
if (result <= 0) ABORT("Couldn't read /proc/self/maps"); |
|
GC_err_write(maps_temp, result); |
|
} while (result == sizeof(maps_temp)); |
|
|
|
GC_err_printf0("---------- End address map ----------\n"); |
|
} |
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|
|
#endif |
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|
|
|