version 1.1, 1999/12/03 07:39:10 |
version 1.2, 2000/04/10 08:31:31 |
Line 2 int ox_usr1_sent, ox_int_received, critical_when_signa |
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Line 2 int ox_usr1_sent, ox_int_received, critical_when_signa |
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static int inside_critical_section; |
static int inside_critical_section; |
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/* |
/* |
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* 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. |
* Copyright (c) 1996-1997 by Silicon Graphics. All rights reserved. |
* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved. |
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* Copyright (c) 1999 by Hewlett-Packard Company. All rights reserved. |
* |
* |
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED |
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED |
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK. |
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK. |
Line 34 static int inside_critical_section; |
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Line 36 static int inside_critical_section; |
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/* make sure the former gets defined to be the latter if appropriate. */ |
/* make sure the former gets defined to be the latter if appropriate. */ |
# include <features.h> |
# include <features.h> |
# if 2 <= __GLIBC__ |
# if 2 <= __GLIBC__ |
# if 0 == __GLIBC_MINOR__ |
# if 2 == __GLIBC__ && 0 == __GLIBC_MINOR__ |
/* glibc 2.1 no longer has sigcontext.h. But signal.h */ |
/* glibc 2.1 no longer has sigcontext.h. But signal.h */ |
/* has the right declaration for glibc 2.1. */ |
/* has the right declaration for glibc 2.1. */ |
# include <sigcontext.h> |
# include <sigcontext.h> |
Line 57 static int inside_critical_section; |
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Line 59 static int inside_critical_section; |
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# include <signal.h> |
# include <signal.h> |
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/* Blatantly OS dependent routines, except for those that are related */ |
/* Blatantly OS dependent routines, except for those that are related */ |
/* dynamic loading. */ |
/* to dynamic loading. */ |
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# if !defined(THREADS) && !defined(STACKBOTTOM) && defined(HEURISTIC2) |
# if !defined(THREADS) && !defined(STACKBOTTOM) && defined(HEURISTIC2) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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# if defined(IRIX_THREADS) |
# if defined(IRIX_THREADS) || defined(HPUX_THREADS) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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Line 75 static int inside_critical_section; |
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Line 77 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(LINUX) && (defined(POWERPC) || defined(SPARC) || defined(ALPHA)) |
# if defined(LINUX) && \ |
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(defined(POWERPC) || defined(SPARC) || defined(ALPHA) || defined(IA64)) |
# define NEED_FIND_LIMIT |
# define NEED_FIND_LIMIT |
# endif |
# endif |
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Line 142 static int inside_critical_section; |
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Line 145 static int inside_critical_section; |
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# define OPT_PROT_EXEC 0 |
# define OPT_PROT_EXEC 0 |
#endif |
#endif |
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#if defined(LINUX) && (defined(POWERPC) || defined(SPARC) || defined(ALPHA)) |
#if defined(LINUX) && (defined(POWERPC) || defined(SPARC) || defined(ALPHA) \ |
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|| defined(IA64)) |
/* 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 */ |
Line 516 ptr_t GC_get_stack_base() |
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Line 520 ptr_t GC_get_stack_base() |
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# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
static struct sigaction old_segv_act; |
static struct sigaction old_segv_act; |
# if defined(_sigargs) /* !Irix6.x */ |
# if defined(_sigargs) || defined(HPUX) /* !Irix6.x */ |
static struct sigaction old_bus_act; |
static struct sigaction old_bus_act; |
# endif |
# endif |
# else |
# else |
Line 544 ptr_t GC_get_stack_base() |
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Line 548 ptr_t GC_get_stack_base() |
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(void) sigaction(SIGSEGV, &act, 0); |
(void) sigaction(SIGSEGV, &act, 0); |
# else |
# else |
(void) sigaction(SIGSEGV, &act, &old_segv_act); |
(void) sigaction(SIGSEGV, &act, &old_segv_act); |
# ifdef _sigargs /* Irix 5.x, not 6.x */ |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
/* Under 5.x, we may get SIGBUS. */ |
|| defined(HPUX) |
/* Pthreads doesn't exist under 5.x, so we don't */ |
/* Under Irix 5.x or HP/UX, we may get SIGBUS. */ |
/* have to worry in the threads case. */ |
/* Pthreads doesn't exist under Irix 5.x, so we */ |
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/* 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 /* IRIX_THREADS */ |
Line 563 ptr_t GC_get_stack_base() |
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Line 568 ptr_t GC_get_stack_base() |
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{ |
{ |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) |
(void) sigaction(SIGSEGV, &old_segv_act, 0); |
(void) sigaction(SIGSEGV, &old_segv_act, 0); |
# ifdef _sigargs /* Irix 5.x, not 6.x */ |
# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \ |
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|| defined(HPUX) |
(void) sigaction(SIGBUS, &old_bus_act, 0); |
(void) sigaction(SIGBUS, &old_bus_act, 0); |
# endif |
# endif |
# else |
# else |
Line 608 ptr_t GC_get_stack_base() |
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Line 614 ptr_t GC_get_stack_base() |
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} |
} |
# endif |
# endif |
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#ifdef LINUX_STACKBOTTOM |
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# define STAT_SKIP 27 /* Number of fields preceding startstack */ |
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/* field in /proc/<pid>/stat */ |
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ptr_t GC_linux_stack_base(void) |
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{ |
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char buf[50]; |
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FILE *f; |
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char c; |
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word result = 0; |
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int i; |
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sprintf(buf, "/proc/%d/stat", getpid()); |
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f = fopen(buf, "r"); |
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if (NULL == f) ABORT("Couldn't open /proc/<pid>/stat"); |
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c = getc(f); |
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/* Skip the required number of fields. This number is hopefully */ |
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/* constant across all Linux implementations. */ |
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for (i = 0; i < STAT_SKIP; ++i) { |
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while (isspace(c)) c = getc(f); |
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while (!isspace(c)) c = getc(f); |
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} |
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while (isspace(c)) c = getc(f); |
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while (isdigit(c)) { |
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result *= 10; |
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result += c - '0'; |
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c = getc(f); |
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} |
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if (result < 0x10000000) ABORT("Absurd stack bottom value"); |
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return (ptr_t)result; |
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} |
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#endif /* LINUX_STACKBOTTOM */ |
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ptr_t GC_get_stack_base() |
ptr_t GC_get_stack_base() |
{ |
{ |
word dummy; |
word dummy; |
Line 629 ptr_t GC_get_stack_base() |
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Line 669 ptr_t GC_get_stack_base() |
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& ~STACKBOTTOM_ALIGNMENT_M1); |
& ~STACKBOTTOM_ALIGNMENT_M1); |
# endif |
# endif |
# endif /* HEURISTIC1 */ |
# endif /* HEURISTIC1 */ |
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# ifdef LINUX_STACKBOTTOM |
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result = GC_linux_stack_base(); |
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# 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 1462 void GC_default_push_other_roots() |
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Line 1505 void GC_default_push_other_roots() |
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# if defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \ |
# if defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \ |
|| defined(IRIX_THREADS) || defined(LINUX_THREADS) \ |
|| defined(IRIX_THREADS) || defined(LINUX_THREADS) \ |
|| defined(IRIX_PCR_THREADS) |
|| defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS) |
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extern void GC_push_all_stacks(); |
extern void GC_push_all_stacks(); |
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Line 1589 struct hblk *h; |
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Line 1632 struct hblk *h; |
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# include <sys/syscall.h> |
# include <sys/syscall.h> |
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# define PROTECT(addr, len) \ |
# define PROTECT(addr, len) \ |
if (mprotect((caddr_t)(addr), (int)(len), \ |
if (mprotect((caddr_t)(addr), (size_t)(len), \ |
PROT_READ | OPT_PROT_EXEC) < 0) { \ |
PROT_READ | OPT_PROT_EXEC) < 0) { \ |
ABORT("mprotect failed"); \ |
ABORT("mprotect failed"); \ |
} |
} |
# define UNPROTECT(addr, len) \ |
# define UNPROTECT(addr, len) \ |
if (mprotect((caddr_t)(addr), (int)(len), \ |
if (mprotect((caddr_t)(addr), (size_t)(len), \ |
PROT_WRITE | PROT_READ | OPT_PROT_EXEC ) < 0) { \ |
PROT_WRITE | PROT_READ | OPT_PROT_EXEC ) < 0) { \ |
ABORT("un-mprotect failed"); \ |
ABORT("un-mprotect failed"); \ |
} |
} |
Line 1623 struct hblk *h; |
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Line 1666 struct hblk *h; |
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typedef void (* SIG_PF)(); |
typedef void (* SIG_PF)(); |
#endif |
#endif |
#if defined(SUNOS5SIGS) || defined(OSF1) || defined(LINUX) |
#if defined(SUNOS5SIGS) || defined(OSF1) || defined(LINUX) |
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# ifdef __STDC__ |
typedef void (* SIG_PF)(int); |
typedef void (* SIG_PF)(int); |
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# else |
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typedef void (* SIG_PF)(); |
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# endif |
#endif |
#endif |
#if defined(MSWIN32) |
#if defined(MSWIN32) |
typedef LPTOP_LEVEL_EXCEPTION_FILTER SIG_PF; |
typedef LPTOP_LEVEL_EXCEPTION_FILTER SIG_PF; |
Line 1635 struct hblk *h; |
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Line 1682 struct hblk *h; |
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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) |
typedef void (* REAL_SIG_PF)(int, struct siginfo *, void *); |
# ifdef HPUX |
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# define SIGINFO __siginfo |
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# else |
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# define SIGINFO siginfo |
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# endif |
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# ifdef __STDC__ |
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typedef void (* REAL_SIG_PF)(int, struct SIGINFO *, void *); |
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# else |
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typedef void (* REAL_SIG_PF)(); |
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# endif |
#endif |
#endif |
#if defined(LINUX) |
#if defined(LINUX) |
# include <linux/version.h> |
# include <linux/version.h> |
# if (LINUX_VERSION_CODE >= 0x20100) && !defined(M68K) || defined(ALPHA) |
# if (LINUX_VERSION_CODE >= 0x20100) && !defined(M68K) || defined(ALPHA) || defined(IA64) |
typedef struct sigcontext s_c; |
typedef struct sigcontext s_c; |
# else |
# else |
typedef struct sigcontext_struct s_c; |
typedef struct sigcontext_struct s_c; |
# endif |
# endif |
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# if defined(ALPHA) || defined(M68K) |
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typedef void (* REAL_SIG_PF)(int, int, s_c *); |
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# else |
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# if defined(IA64) |
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typedef void (* REAL_SIG_PF)(int, siginfo_t *, s_c *); |
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# else |
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typedef void (* REAL_SIG_PF)(int, s_c); |
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# endif |
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# endif |
# ifdef ALPHA |
# ifdef ALPHA |
typedef void (* REAL_SIG_PF)(int, int, s_c *); |
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/* Retrieve fault address from sigcontext structure by decoding */ |
/* Retrieve fault address from sigcontext structure by decoding */ |
/* instruction. */ |
/* instruction. */ |
char * get_fault_addr(s_c *sc) { |
char * get_fault_addr(s_c *sc) { |
Line 1657 struct hblk *h; |
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Line 1721 struct hblk *h; |
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faultaddr += (word) (((int)instr << 16) >> 16); |
faultaddr += (word) (((int)instr << 16) >> 16); |
return (char *)faultaddr; |
return (char *)faultaddr; |
} |
} |
# else /* !ALPHA */ |
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typedef void (* REAL_SIG_PF)(int, s_c); |
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# endif /* !ALPHA */ |
# endif /* !ALPHA */ |
# endif |
# endif |
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Line 1694 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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Line 1756 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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# endif |
# endif |
# endif |
# endif |
# if defined(LINUX) |
# if defined(LINUX) |
# ifdef ALPHA |
# 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 |
void GC_write_fault_handler(int sig, s_c sc) |
# if defined(IA64) |
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void GC_write_fault_handler(int sig, siginfo_t * si, s_c * scp) |
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# else |
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void GC_write_fault_handler(int sig, s_c sc) |
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# endif |
# endif |
# endif |
# define SIG_OK (sig == SIGSEGV) |
# define SIG_OK (sig == SIGSEGV) |
# define CODE_OK TRUE |
# define CODE_OK TRUE |
/* Empirically c.trapno == 14, but is that useful? */ |
/* Empirically c.trapno == 14, on IA32, but is that useful? */ |
/* We assume Intel architecture, so alignment */ |
/* Should probably consider alignment issues on other */ |
/* faults are not possible. */ |
/* architectures. */ |
# endif |
# endif |
# if defined(SUNOS5SIGS) |
# if defined(SUNOS5SIGS) |
void GC_write_fault_handler(int sig, struct siginfo *scp, void * context) |
# ifdef __STDC__ |
# define SIG_OK (sig == SIGSEGV) |
void GC_write_fault_handler(int sig, struct SIGINFO *scp, void * context) |
# define CODE_OK (scp -> si_code == SEGV_ACCERR) |
# else |
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void GC_write_fault_handler(sig, scp, context) |
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int sig; |
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struct SIGINFO *scp; |
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void * context; |
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# endif |
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# ifdef HPUX |
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# define SIG_OK (sig == SIGSEGV || sig == SIGBUS) |
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# define CODE_OK (scp -> si_code == SEGV_ACCERR) \ |
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|| (scp -> si_code == BUS_ADRERR) \ |
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|| (scp -> si_code == BUS_UNKNOWN) \ |
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|| (scp -> si_code == SEGV_UNKNOWN) \ |
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|| (scp -> si_code == BUS_OBJERR) |
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# else |
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# define SIG_OK (sig == SIGSEGV) |
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# define CODE_OK (scp -> si_code == SEGV_ACCERR) |
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# endif |
# endif |
# endif |
# if defined(MSWIN32) |
# if defined(MSWIN32) |
LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info) |
LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info) |
Line 1760 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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Line 1842 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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# ifdef ALPHA |
# ifdef ALPHA |
char * addr = get_fault_addr(sc); |
char * addr = get_fault_addr(sc); |
# else |
# else |
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# ifdef IA64 |
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char * addr = si -> si_addr; |
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# else |
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# if defined(POWERPC) |
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char * addr = (char *) (sc.regs->dar); |
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# else |
--> architecture not supported |
--> architecture not supported |
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# endif |
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# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
Line 1813 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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Line 1903 SIG_PF GC_old_segv_handler; /* Also old MSWIN32 ACCESS |
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return; |
return; |
# endif |
# endif |
# if defined (LINUX) |
# if defined (LINUX) |
# ifdef ALPHA |
# if defined(ALPHA) || defined(M68K) |
(*(REAL_SIG_PF)old_handler) (sig, code, sc); |
(*(REAL_SIG_PF)old_handler) (sig, code, sc); |
# else |
# else |
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# if defined(IA64) |
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(*(REAL_SIG_PF)old_handler) (sig, si, scp); |
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# else |
(*(REAL_SIG_PF)old_handler) (sig, sc); |
(*(REAL_SIG_PF)old_handler) (sig, sc); |
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# endif |
# endif |
# endif |
return; |
return; |
# endif |
# endif |
Line 1928 void GC_dirty_init() |
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Line 2022 void GC_dirty_init() |
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} |
} |
# endif |
# endif |
# if defined(SUNOS5SIGS) || defined(IRIX5) |
# if defined(SUNOS5SIGS) || defined(IRIX5) |
# if defined(IRIX_THREADS) || defined(IRIX_PCR_THREADS) |
# if defined(IRIX_THREADS) || defined(IRIX_JDK_THREADS) |
sigaction(SIGSEGV, 0, &oldact); |
sigaction(SIGSEGV, 0, &oldact); |
sigaction(SIGSEGV, &act, 0); |
sigaction(SIGSEGV, &act, 0); |
# else |
# else |
Line 1954 void GC_dirty_init() |
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Line 2048 void GC_dirty_init() |
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GC_err_printf0("Replaced other SIGSEGV handler\n"); |
GC_err_printf0("Replaced other SIGSEGV handler\n"); |
# endif |
# endif |
} |
} |
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# ifdef HPUX |
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sigaction(SIGBUS, &act, &oldact); |
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GC_old_bus_handler = oldact.sa_handler; |
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if (GC_old_segv_handler != SIG_DFL) { |
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# ifdef PRINTSTATS |
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GC_err_printf0("Replaced other SIGBUS handler\n"); |
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# endif |
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} |
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# endif |
# endif |
# endif |
# if defined(MSWIN32) |
# if defined(MSWIN32) |
GC_old_segv_handler = SetUnhandledExceptionFilter(GC_write_fault_handler); |
GC_old_segv_handler = SetUnhandledExceptionFilter(GC_write_fault_handler); |