Annotation of OpenXM_contrib2/asir2000/gc5.3/dyn_load.c, Revision 1.1
1.1 ! noro 1: /*
! 2: * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
! 3: * Copyright (c) 1997 by Silicon Graphics. All rights reserved.
! 4: *
! 5: * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
! 6: * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
! 7: *
! 8: * Permission is hereby granted to use or copy this program
! 9: * for any purpose, provided the above notices are retained on all copies.
! 10: * Permission to modify the code and to distribute modified code is granted,
! 11: * provided the above notices are retained, and a notice that the code was
! 12: * modified is included with the above copyright notice.
! 13: *
! 14: * Original author: Bill Janssen
! 15: * Heavily modified by Hans Boehm and others
! 16: */
! 17:
! 18: /*
! 19: * This is incredibly OS specific code for tracking down data sections in
! 20: * dynamic libraries. There appears to be no way of doing this quickly
! 21: * without groveling through undocumented data structures. We would argue
! 22: * that this is a bug in the design of the dlopen interface. THIS CODE
! 23: * MAY BREAK IN FUTURE OS RELEASES. If this matters to you, don't hesitate
! 24: * to let your vendor know ...
! 25: *
! 26: * None of this is safe with dlclose and incremental collection.
! 27: * But then not much of anything is safe in the presence of dlclose.
! 28: */
! 29: #ifndef MACOS
! 30: # include <sys/types.h>
! 31: #endif
! 32: #include "gc_priv.h"
! 33:
! 34: /* BTL: avoid circular redefinition of dlopen if SOLARIS_THREADS defined */
! 35: # if (defined(LINUX_THREADS) || defined(SOLARIS_THREADS) \
! 36: || defined(HPUX_THREADS) || defined(IRIX_THREADS)) && defined(dlopen) \
! 37: && !defined(USE_LD_WRAP)
! 38: /* To support threads in Solaris, gc.h interposes on dlopen by */
! 39: /* defining "dlopen" to be "GC_dlopen", which is implemented below. */
! 40: /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */
! 41: /* real system dlopen() in their implementation. We first remove */
! 42: /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
! 43: # undef dlopen
! 44: # define GC_must_restore_redefined_dlopen
! 45: # else
! 46: # undef GC_must_restore_redefined_dlopen
! 47: # endif
! 48:
! 49: #if (defined(DYNAMIC_LOADING) || defined(MSWIN32)) && !defined(PCR)
! 50: #if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
! 51: !defined(MSWIN32) && !(defined(ALPHA) && defined(OSF1)) && \
! 52: !defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
! 53: !defined(RS6000) && !defined(SCO_ELF)
! 54: --> We only know how to find data segments of dynamic libraries for the
! 55: --> above. Additional SVR4 variants might not be too
! 56: --> hard to add.
! 57: #endif
! 58:
! 59: #include <stdio.h>
! 60: #ifdef SUNOS5DL
! 61: # include <sys/elf.h>
! 62: # include <dlfcn.h>
! 63: # include <link.h>
! 64: #endif
! 65: #ifdef SUNOS4
! 66: # include <dlfcn.h>
! 67: # include <link.h>
! 68: # include <a.out.h>
! 69: /* struct link_map field overrides */
! 70: # define l_next lm_next
! 71: # define l_addr lm_addr
! 72: # define l_name lm_name
! 73: #endif
! 74:
! 75:
! 76: #if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
! 77:
! 78: #ifdef LINT
! 79: Elf32_Dyn _DYNAMIC;
! 80: #endif
! 81:
! 82: static struct link_map *
! 83: GC_FirstDLOpenedLinkMap()
! 84: {
! 85: extern Elf32_Dyn _DYNAMIC;
! 86: Elf32_Dyn *dp;
! 87: struct r_debug *r;
! 88: static struct link_map * cachedResult = 0;
! 89: static Elf32_Dyn *dynStructureAddr = 0;
! 90: /* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */
! 91:
! 92: # ifdef SUNOS53_SHARED_LIB
! 93: /* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set */
! 94: /* up properly in dynamically linked .so's. This means we have */
! 95: /* to use its value in the set of original object files loaded */
! 96: /* at program startup. */
! 97: if( dynStructureAddr == 0 ) {
! 98: void* startupSyms = dlopen(0, RTLD_LAZY);
! 99: dynStructureAddr = (Elf32_Dyn*)dlsym(startupSyms, "_DYNAMIC");
! 100: }
! 101: # else
! 102: dynStructureAddr = &_DYNAMIC;
! 103: # endif
! 104:
! 105: if( dynStructureAddr == 0) {
! 106: return(0);
! 107: }
! 108: if( cachedResult == 0 ) {
! 109: int tag;
! 110: for( dp = ((Elf32_Dyn *)(&_DYNAMIC)); (tag = dp->d_tag) != 0; dp++ ) {
! 111: if( tag == DT_DEBUG ) {
! 112: struct link_map *lm
! 113: = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
! 114: if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
! 115: break;
! 116: }
! 117: }
! 118: }
! 119: return cachedResult;
! 120: }
! 121:
! 122: #endif /* SUNOS5DL ... */
! 123:
! 124: #if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES)
! 125:
! 126: #ifdef LINT
! 127: struct link_dynamic _DYNAMIC;
! 128: #endif
! 129:
! 130: static struct link_map *
! 131: GC_FirstDLOpenedLinkMap()
! 132: {
! 133: extern struct link_dynamic _DYNAMIC;
! 134:
! 135: if( &_DYNAMIC == 0) {
! 136: return(0);
! 137: }
! 138: return(_DYNAMIC.ld_un.ld_1->ld_loaded);
! 139: }
! 140:
! 141: /* Return the address of the ld.so allocated common symbol */
! 142: /* with the least address, or 0 if none. */
! 143: static ptr_t GC_first_common()
! 144: {
! 145: ptr_t result = 0;
! 146: extern struct link_dynamic _DYNAMIC;
! 147: struct rtc_symb * curr_symbol;
! 148:
! 149: if( &_DYNAMIC == 0) {
! 150: return(0);
! 151: }
! 152: curr_symbol = _DYNAMIC.ldd -> ldd_cp;
! 153: for (; curr_symbol != 0; curr_symbol = curr_symbol -> rtc_next) {
! 154: if (result == 0
! 155: || (ptr_t)(curr_symbol -> rtc_sp -> n_value) < result) {
! 156: result = (ptr_t)(curr_symbol -> rtc_sp -> n_value);
! 157: }
! 158: }
! 159: return(result);
! 160: }
! 161:
! 162: #endif /* SUNOS4 ... */
! 163:
! 164: # if defined(LINUX_THREADS) || defined(SOLARIS_THREADS) \
! 165: || defined(HPUX_THREADS) || defined(IRIX_THREADS)
! 166: /* Make sure we're not in the middle of a collection, and make */
! 167: /* sure we don't start any. Returns previous value of GC_dont_gc. */
! 168: /* This is invoked prior to a dlopen call to avoid synchronization */
! 169: /* issues. We can't just acquire the allocation lock, since startup */
! 170: /* code in dlopen may try to allocate. */
! 171: /* This solution risks heap growth in the presence of many dlopen */
! 172: /* calls in either a multithreaded environment, or if the library */
! 173: /* initialization code allocates substantial amounts of GC'ed memory. */
! 174: /* But I don't know of a better solution. */
! 175: /* This can still deadlock if the client explicitly starts a GC */
! 176: /* during the dlopen. He shouldn't do that. */
! 177: static GC_bool disable_gc_for_dlopen()
! 178: {
! 179: GC_bool result;
! 180: LOCK();
! 181: result = GC_dont_gc;
! 182: while (GC_incremental && GC_collection_in_progress()) {
! 183: GC_collect_a_little_inner(1000);
! 184: }
! 185: GC_dont_gc = TRUE;
! 186: UNLOCK();
! 187: return(result);
! 188: }
! 189:
! 190: /* Redefine dlopen to guarantee mutual exclusion with */
! 191: /* GC_register_dynamic_libraries. */
! 192: /* Should probably happen for other operating systems, too. */
! 193:
! 194: #include <dlfcn.h>
! 195:
! 196: #ifdef USE_LD_WRAP
! 197: void * __wrap_dlopen(const char *path, int mode)
! 198: #else
! 199: void * GC_dlopen(path, mode)
! 200: GC_CONST char * path;
! 201: int mode;
! 202: #endif
! 203: {
! 204: void * result;
! 205: GC_bool dont_gc_save;
! 206:
! 207: # ifndef USE_PROC_FOR_LIBRARIES
! 208: dont_gc_save = disable_gc_for_dlopen();
! 209: # endif
! 210: # ifdef USE_LD_WRAP
! 211: result = __real_dlopen(path, mode);
! 212: # else
! 213: result = dlopen(path, mode);
! 214: # endif
! 215: # ifndef USE_PROC_FOR_LIBRARIES
! 216: GC_dont_gc = dont_gc_save;
! 217: # endif
! 218: return(result);
! 219: }
! 220: # endif /* SOLARIS_THREADS */
! 221:
! 222: /* BTL: added to fix circular dlopen definition if SOLARIS_THREADS defined */
! 223: # if defined(GC_must_restore_redefined_dlopen)
! 224: # define dlopen GC_dlopen
! 225: # endif
! 226:
! 227: # if defined(SUNOS4) || defined(SUNOS5DL)
! 228: /* Add dynamic library data sections to the root set. */
! 229: # if !defined(PCR) && !defined(SOLARIS_THREADS) && defined(THREADS)
! 230: # ifndef SRC_M3
! 231: --> fix mutual exclusion with dlopen
! 232: # endif /* We assume M3 programs don't call dlopen for now */
! 233: # endif
! 234:
! 235: # ifndef USE_PROC_FOR_LIBRARIES
! 236: void GC_register_dynamic_libraries()
! 237: {
! 238: struct link_map *lm = GC_FirstDLOpenedLinkMap();
! 239:
! 240:
! 241: for (lm = GC_FirstDLOpenedLinkMap();
! 242: lm != (struct link_map *) 0; lm = lm->l_next)
! 243: {
! 244: # ifdef SUNOS4
! 245: struct exec *e;
! 246:
! 247: e = (struct exec *) lm->lm_addr;
! 248: GC_add_roots_inner(
! 249: ((char *) (N_DATOFF(*e) + lm->lm_addr)),
! 250: ((char *) (N_BSSADDR(*e) + e->a_bss + lm->lm_addr)),
! 251: TRUE);
! 252: # endif
! 253: # ifdef SUNOS5DL
! 254: Elf32_Ehdr * e;
! 255: Elf32_Phdr * p;
! 256: unsigned long offset;
! 257: char * start;
! 258: register int i;
! 259:
! 260: e = (Elf32_Ehdr *) lm->l_addr;
! 261: p = ((Elf32_Phdr *)(((char *)(e)) + e->e_phoff));
! 262: offset = ((unsigned long)(lm->l_addr));
! 263: for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
! 264: switch( p->p_type ) {
! 265: case PT_LOAD:
! 266: {
! 267: if( !(p->p_flags & PF_W) ) break;
! 268: start = ((char *)(p->p_vaddr)) + offset;
! 269: GC_add_roots_inner(
! 270: start,
! 271: start + p->p_memsz,
! 272: TRUE
! 273: );
! 274: }
! 275: break;
! 276: default:
! 277: break;
! 278: }
! 279: }
! 280: # endif
! 281: }
! 282: # ifdef SUNOS4
! 283: {
! 284: static ptr_t common_start = 0;
! 285: ptr_t common_end;
! 286: extern ptr_t GC_find_limit();
! 287:
! 288: if (common_start == 0) common_start = GC_first_common();
! 289: if (common_start != 0) {
! 290: common_end = GC_find_limit(common_start, TRUE);
! 291: GC_add_roots_inner((char *)common_start, (char *)common_end, TRUE);
! 292: }
! 293: }
! 294: # endif
! 295: }
! 296:
! 297: # endif /* !USE_PROC ... */
! 298: # endif /* SUNOS */
! 299:
! 300: #if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF)
! 301:
! 302: /* Dynamic loading code for Linux running ELF. Somewhat tested on
! 303: * Linux/x86, untested but hopefully should work on Linux/Alpha.
! 304: * This code was derived from the Solaris/ELF support. Thanks to
! 305: * whatever kind soul wrote that. - Patrick Bridges */
! 306:
! 307: #include <elf.h>
! 308: #include <link.h>
! 309:
! 310: /* Newer versions of Linux/Alpha and Linux/x86 define this macro. We
! 311: * define it for those older versions that don't. */
! 312: # ifndef ElfW
! 313: # if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32
! 314: # define ElfW(type) Elf32_##type
! 315: # else
! 316: # define ElfW(type) Elf64_##type
! 317: # endif
! 318: # endif
! 319:
! 320: static struct link_map *
! 321: GC_FirstDLOpenedLinkMap()
! 322: {
! 323: # ifdef __GNUC__
! 324: # pragma weak _DYNAMIC
! 325: # endif
! 326: extern ElfW(Dyn) _DYNAMIC[];
! 327: ElfW(Dyn) *dp;
! 328: struct r_debug *r;
! 329: static struct link_map *cachedResult = 0;
! 330:
! 331: if( _DYNAMIC == 0) {
! 332: return(0);
! 333: }
! 334: if( cachedResult == 0 ) {
! 335: int tag;
! 336: for( dp = _DYNAMIC; (tag = dp->d_tag) != 0; dp++ ) {
! 337: if( tag == DT_DEBUG ) {
! 338: struct link_map *lm
! 339: = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
! 340: if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
! 341: break;
! 342: }
! 343: }
! 344: }
! 345: return cachedResult;
! 346: }
! 347:
! 348:
! 349: void GC_register_dynamic_libraries()
! 350: {
! 351: struct link_map *lm = GC_FirstDLOpenedLinkMap();
! 352:
! 353:
! 354: for (lm = GC_FirstDLOpenedLinkMap();
! 355: lm != (struct link_map *) 0; lm = lm->l_next)
! 356: {
! 357: ElfW(Ehdr) * e;
! 358: ElfW(Phdr) * p;
! 359: unsigned long offset;
! 360: char * start;
! 361: register int i;
! 362:
! 363: e = (ElfW(Ehdr) *) lm->l_addr;
! 364: p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
! 365: offset = ((unsigned long)(lm->l_addr));
! 366: for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
! 367: switch( p->p_type ) {
! 368: case PT_LOAD:
! 369: {
! 370: if( !(p->p_flags & PF_W) ) break;
! 371: start = ((char *)(p->p_vaddr)) + offset;
! 372: GC_add_roots_inner(start, start + p->p_memsz, TRUE);
! 373: }
! 374: break;
! 375: default:
! 376: break;
! 377: }
! 378: }
! 379: }
! 380: }
! 381:
! 382: #endif
! 383:
! 384: #if defined(IRIX5) || defined(USE_PROC_FOR_LIBRARIES)
! 385:
! 386: #include <sys/procfs.h>
! 387: #include <sys/stat.h>
! 388: #include <fcntl.h>
! 389: #include <elf.h>
! 390: #include <errno.h>
! 391:
! 392: extern void * GC_roots_present();
! 393: /* The type is a lie, since the real type doesn't make sense here, */
! 394: /* and we only test for NULL. */
! 395:
! 396: #ifndef GC_scratch_last_end_ptr /* Never an extern any more? */
! 397: extern ptr_t GC_scratch_last_end_ptr; /* End of GC_scratch_alloc arena */
! 398: #endif
! 399:
! 400: /* We use /proc to track down all parts of the address space that are */
! 401: /* mapped by the process, and throw out regions we know we shouldn't */
! 402: /* worry about. This may also work under other SVR4 variants. */
! 403: void GC_register_dynamic_libraries()
! 404: {
! 405: static int fd = -1;
! 406: char buf[30];
! 407: static prmap_t * addr_map = 0;
! 408: static int current_sz = 0; /* Number of records currently in addr_map */
! 409: static int needed_sz; /* Required size of addr_map */
! 410: register int i;
! 411: register long flags;
! 412: register ptr_t start;
! 413: register ptr_t limit;
! 414: ptr_t heap_start = (ptr_t)HEAP_START;
! 415: ptr_t heap_end = heap_start;
! 416:
! 417: # ifdef SUNOS5DL
! 418: # define MA_PHYS 0
! 419: # endif /* SUNOS5DL */
! 420:
! 421: if (fd < 0) {
! 422: sprintf(buf, "/proc/%d", getpid());
! 423: /* The above generates a lint complaint, since pid_t varies. */
! 424: /* It's unclear how to improve this. */
! 425: fd = open(buf, O_RDONLY);
! 426: if (fd < 0) {
! 427: ABORT("/proc open failed");
! 428: }
! 429: }
! 430: if (ioctl(fd, PIOCNMAP, &needed_sz) < 0) {
! 431: GC_err_printf2("fd = %d, errno = %d\n", fd, errno);
! 432: ABORT("/proc PIOCNMAP ioctl failed");
! 433: }
! 434: if (needed_sz >= current_sz) {
! 435: current_sz = needed_sz * 2 + 1;
! 436: /* Expansion, plus room for 0 record */
! 437: addr_map = (prmap_t *)GC_scratch_alloc((word)
! 438: (current_sz * sizeof(prmap_t)));
! 439: }
! 440: if (ioctl(fd, PIOCMAP, addr_map) < 0) {
! 441: GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n",
! 442: fd, errno, needed_sz, addr_map);
! 443: ABORT("/proc PIOCMAP ioctl failed");
! 444: };
! 445: if (GC_n_heap_sects > 0) {
! 446: heap_end = GC_heap_sects[GC_n_heap_sects-1].hs_start
! 447: + GC_heap_sects[GC_n_heap_sects-1].hs_bytes;
! 448: if (heap_end < GC_scratch_last_end_ptr) heap_end = GC_scratch_last_end_ptr;
! 449: }
! 450: for (i = 0; i < needed_sz; i++) {
! 451: flags = addr_map[i].pr_mflags;
! 452: if ((flags & (MA_BREAK | MA_STACK | MA_PHYS)) != 0) goto irrelevant;
! 453: if ((flags & (MA_READ | MA_WRITE)) != (MA_READ | MA_WRITE))
! 454: goto irrelevant;
! 455: /* The latter test is empirically useless. Other than the */
! 456: /* main data and stack segments, everything appears to be */
! 457: /* mapped readable, writable, executable, and shared(!!). */
! 458: /* This makes no sense to me. - HB */
! 459: start = (ptr_t)(addr_map[i].pr_vaddr);
! 460: if (GC_roots_present(start)) goto irrelevant;
! 461: if (start < heap_end && start >= heap_start)
! 462: goto irrelevant;
! 463: # ifdef MMAP_STACKS
! 464: if (GC_is_thread_stack(start)) goto irrelevant;
! 465: # endif /* MMAP_STACKS */
! 466:
! 467: limit = start + addr_map[i].pr_size;
! 468: if (addr_map[i].pr_off == 0 && strncmp(start, ELFMAG, 4) == 0) {
! 469: /* Discard text segments, i.e. 0-offset mappings against */
! 470: /* executable files which appear to have ELF headers. */
! 471: caddr_t arg;
! 472: int obj;
! 473: # define MAP_IRR_SZ 10
! 474: static ptr_t map_irr[MAP_IRR_SZ];
! 475: /* Known irrelevant map entries */
! 476: static int n_irr = 0;
! 477: struct stat buf;
! 478: register int i;
! 479:
! 480: for (i = 0; i < n_irr; i++) {
! 481: if (map_irr[i] == start) goto irrelevant;
! 482: }
! 483: arg = (caddr_t)start;
! 484: obj = ioctl(fd, PIOCOPENM, &arg);
! 485: if (obj >= 0) {
! 486: fstat(obj, &buf);
! 487: close(obj);
! 488: if ((buf.st_mode & 0111) != 0) {
! 489: if (n_irr < MAP_IRR_SZ) {
! 490: map_irr[n_irr++] = start;
! 491: }
! 492: goto irrelevant;
! 493: }
! 494: }
! 495: }
! 496: GC_add_roots_inner(start, limit, TRUE);
! 497: irrelevant: ;
! 498: }
! 499: /* Dont keep cached descriptor, for now. Some kernels don't like us */
! 500: /* to keep a /proc file descriptor around during kill -9. */
! 501: if (close(fd) < 0) ABORT("Couldnt close /proc file");
! 502: fd = -1;
! 503: }
! 504:
! 505: # endif /* USE_PROC || IRIX5 */
! 506:
! 507: # ifdef MSWIN32
! 508:
! 509: # define WIN32_LEAN_AND_MEAN
! 510: # define NOSERVICE
! 511: # include <windows.h>
! 512: # include <stdlib.h>
! 513:
! 514: /* We traverse the entire address space and register all segments */
! 515: /* that could possibly have been written to. */
! 516: DWORD GC_allocation_granularity;
! 517:
! 518: extern GC_bool GC_is_heap_base (ptr_t p);
! 519:
! 520: # ifdef WIN32_THREADS
! 521: extern void GC_get_next_stack(char *start, char **lo, char **hi);
! 522: # endif
! 523:
! 524: void GC_cond_add_roots(char *base, char * limit)
! 525: {
! 526: char dummy;
! 527: char * stack_top
! 528: = (char *) ((word)(&dummy) & ~(GC_allocation_granularity-1));
! 529: if (base == limit) return;
! 530: # ifdef WIN32_THREADS
! 531: {
! 532: char * curr_base = base;
! 533: char * next_stack_lo;
! 534: char * next_stack_hi;
! 535:
! 536: for(;;) {
! 537: GC_get_next_stack(curr_base, &next_stack_lo, &next_stack_hi);
! 538: if (next_stack_lo >= limit) break;
! 539: GC_add_roots_inner(curr_base, next_stack_lo, TRUE);
! 540: curr_base = next_stack_hi;
! 541: }
! 542: if (curr_base < limit) GC_add_roots_inner(curr_base, limit, TRUE);
! 543: }
! 544: # else
! 545: if (limit > stack_top && base < GC_stackbottom) {
! 546: /* Part of the stack; ignore it. */
! 547: return;
! 548: }
! 549: GC_add_roots_inner(base, limit, TRUE);
! 550: # endif
! 551: }
! 552:
! 553: extern GC_bool GC_win32s;
! 554:
! 555: void GC_register_dynamic_libraries()
! 556: {
! 557: MEMORY_BASIC_INFORMATION buf;
! 558: SYSTEM_INFO sysinfo;
! 559: DWORD result;
! 560: DWORD protect;
! 561: LPVOID p;
! 562: char * base;
! 563: char * limit, * new_limit;
! 564:
! 565: if (GC_win32s) return;
! 566: GetSystemInfo(&sysinfo);
! 567: base = limit = p = sysinfo.lpMinimumApplicationAddress;
! 568: GC_allocation_granularity = sysinfo.dwAllocationGranularity;
! 569: while (p < sysinfo.lpMaximumApplicationAddress) {
! 570: result = VirtualQuery(p, &buf, sizeof(buf));
! 571: if (result != sizeof(buf)) {
! 572: ABORT("Weird VirtualQuery result");
! 573: }
! 574: new_limit = (char *)p + buf.RegionSize;
! 575: protect = buf.Protect;
! 576: if (buf.State == MEM_COMMIT
! 577: && (protect == PAGE_EXECUTE_READWRITE
! 578: || protect == PAGE_READWRITE)
! 579: && !GC_is_heap_base(buf.AllocationBase)) {
! 580: if ((char *)p == limit) {
! 581: limit = new_limit;
! 582: } else {
! 583: GC_cond_add_roots(base, limit);
! 584: base = p;
! 585: limit = new_limit;
! 586: }
! 587: }
! 588: if (p > (LPVOID)new_limit /* overflow */) break;
! 589: p = (LPVOID)new_limit;
! 590: }
! 591: GC_cond_add_roots(base, limit);
! 592: }
! 593:
! 594: #endif /* MSWIN32 */
! 595:
! 596: #if defined(ALPHA) && defined(OSF1)
! 597:
! 598: #include <loader.h>
! 599:
! 600: void GC_register_dynamic_libraries()
! 601: {
! 602: int status;
! 603: ldr_process_t mypid;
! 604:
! 605: /* module */
! 606: ldr_module_t moduleid = LDR_NULL_MODULE;
! 607: ldr_module_info_t moduleinfo;
! 608: size_t moduleinfosize = sizeof(moduleinfo);
! 609: size_t modulereturnsize;
! 610:
! 611: /* region */
! 612: ldr_region_t region;
! 613: ldr_region_info_t regioninfo;
! 614: size_t regioninfosize = sizeof(regioninfo);
! 615: size_t regionreturnsize;
! 616:
! 617: /* Obtain id of this process */
! 618: mypid = ldr_my_process();
! 619:
! 620: /* For each module */
! 621: while (TRUE) {
! 622:
! 623: /* Get the next (first) module */
! 624: status = ldr_next_module(mypid, &moduleid);
! 625:
! 626: /* Any more modules? */
! 627: if (moduleid == LDR_NULL_MODULE)
! 628: break; /* No more modules */
! 629:
! 630: /* Check status AFTER checking moduleid because */
! 631: /* of a bug in the non-shared ldr_next_module stub */
! 632: if (status != 0 ) {
! 633: GC_printf1("dynamic_load: status = %ld\n", (long)status);
! 634: {
! 635: extern char *sys_errlist[];
! 636: extern int sys_nerr;
! 637: extern int errno;
! 638: if (errno <= sys_nerr) {
! 639: GC_printf1("dynamic_load: %s\n", (long)sys_errlist[errno]);
! 640: } else {
! 641: GC_printf1("dynamic_load: %d\n", (long)errno);
! 642: }
! 643: }
! 644: ABORT("ldr_next_module failed");
! 645: }
! 646:
! 647: /* Get the module information */
! 648: status = ldr_inq_module(mypid, moduleid, &moduleinfo,
! 649: moduleinfosize, &modulereturnsize);
! 650: if (status != 0 )
! 651: ABORT("ldr_inq_module failed");
! 652:
! 653: /* is module for the main program (i.e. nonshared portion)? */
! 654: if (moduleinfo.lmi_flags & LDR_MAIN)
! 655: continue; /* skip the main module */
! 656:
! 657: # ifdef VERBOSE
! 658: GC_printf("---Module---\n");
! 659: GC_printf("Module ID = %16ld\n", moduleinfo.lmi_modid);
! 660: GC_printf("Count of regions = %16d\n", moduleinfo.lmi_nregion);
! 661: GC_printf("flags for module = %16lx\n", moduleinfo.lmi_flags);
! 662: GC_printf("pathname of module = \"%s\"\n", moduleinfo.lmi_name);
! 663: # endif
! 664:
! 665: /* For each region in this module */
! 666: for (region = 0; region < moduleinfo.lmi_nregion; region++) {
! 667:
! 668: /* Get the region information */
! 669: status = ldr_inq_region(mypid, moduleid, region, ®ioninfo,
! 670: regioninfosize, ®ionreturnsize);
! 671: if (status != 0 )
! 672: ABORT("ldr_inq_region failed");
! 673:
! 674: /* only process writable (data) regions */
! 675: if (! (regioninfo.lri_prot & LDR_W))
! 676: continue;
! 677:
! 678: # ifdef VERBOSE
! 679: GC_printf("--- Region ---\n");
! 680: GC_printf("Region number = %16ld\n",
! 681: regioninfo.lri_region_no);
! 682: GC_printf("Protection flags = %016x\n", regioninfo.lri_prot);
! 683: GC_printf("Virtual address = %16p\n", regioninfo.lri_vaddr);
! 684: GC_printf("Mapped address = %16p\n", regioninfo.lri_mapaddr);
! 685: GC_printf("Region size = %16ld\n", regioninfo.lri_size);
! 686: GC_printf("Region name = \"%s\"\n", regioninfo.lri_name);
! 687: # endif
! 688:
! 689: /* register region as a garbage collection root */
! 690: GC_add_roots_inner (
! 691: (char *)regioninfo.lri_mapaddr,
! 692: (char *)regioninfo.lri_mapaddr + regioninfo.lri_size,
! 693: TRUE);
! 694:
! 695: }
! 696: }
! 697: }
! 698: #endif
! 699:
! 700: #if defined(HPUX)
! 701:
! 702: #include <errno.h>
! 703: #include <dl.h>
! 704:
! 705: extern int errno;
! 706: extern char *sys_errlist[];
! 707: extern int sys_nerr;
! 708:
! 709: void GC_register_dynamic_libraries()
! 710: {
! 711: int status;
! 712: int index = 1; /* Ordinal position in shared library search list */
! 713: struct shl_descriptor *shl_desc; /* Shared library info, see dl.h */
! 714:
! 715: /* For each dynamic library loaded */
! 716: while (TRUE) {
! 717:
! 718: /* Get info about next shared library */
! 719: status = shl_get(index, &shl_desc);
! 720:
! 721: /* Check if this is the end of the list or if some error occured */
! 722: if (status != 0) {
! 723: # ifdef HPUX_THREADS
! 724: /* I've seen errno values of 0. The man page is not clear */
! 725: /* as to whether errno should get set on a -1 return. */
! 726: break;
! 727: # else
! 728: if (errno == EINVAL) {
! 729: break; /* Moved past end of shared library list --> finished */
! 730: } else {
! 731: if (errno <= sys_nerr) {
! 732: GC_printf1("dynamic_load: %s\n", (long) sys_errlist[errno]);
! 733: } else {
! 734: GC_printf1("dynamic_load: %d\n", (long) errno);
! 735: }
! 736: ABORT("shl_get failed");
! 737: }
! 738: # endif
! 739: }
! 740:
! 741: # ifdef VERBOSE
! 742: GC_printf0("---Shared library---\n");
! 743: GC_printf1("\tfilename = \"%s\"\n", shl_desc->filename);
! 744: GC_printf1("\tindex = %d\n", index);
! 745: GC_printf1("\thandle = %08x\n",
! 746: (unsigned long) shl_desc->handle);
! 747: GC_printf1("\ttext seg. start = %08x\n", shl_desc->tstart);
! 748: GC_printf1("\ttext seg. end = %08x\n", shl_desc->tend);
! 749: GC_printf1("\tdata seg. start = %08x\n", shl_desc->dstart);
! 750: GC_printf1("\tdata seg. end = %08x\n", shl_desc->dend);
! 751: GC_printf1("\tref. count = %lu\n", shl_desc->ref_count);
! 752: # endif
! 753:
! 754: /* register shared library's data segment as a garbage collection root */
! 755: GC_add_roots_inner((char *) shl_desc->dstart,
! 756: (char *) shl_desc->dend, TRUE);
! 757:
! 758: index++;
! 759: }
! 760: }
! 761: #endif /* HPUX */
! 762:
! 763: #ifdef RS6000
! 764: #pragma alloca
! 765: #include <sys/ldr.h>
! 766: #include <sys/errno.h>
! 767: void GC_register_dynamic_libraries()
! 768: {
! 769: int len;
! 770: char *ldibuf;
! 771: int ldibuflen;
! 772: struct ld_info *ldi;
! 773:
! 774: ldibuf = alloca(ldibuflen = 8192);
! 775:
! 776: while ( (len = loadquery(L_GETINFO,ldibuf,ldibuflen)) < 0) {
! 777: if (errno != ENOMEM) {
! 778: ABORT("loadquery failed");
! 779: }
! 780: ldibuf = alloca(ldibuflen *= 2);
! 781: }
! 782:
! 783: ldi = (struct ld_info *)ldibuf;
! 784: while (ldi) {
! 785: len = ldi->ldinfo_next;
! 786: GC_add_roots_inner(
! 787: ldi->ldinfo_dataorg,
! 788: (unsigned long)ldi->ldinfo_dataorg
! 789: + ldi->ldinfo_datasize,
! 790: TRUE);
! 791: ldi = len ? (struct ld_info *)((char *)ldi + len) : 0;
! 792: }
! 793: }
! 794: #endif /* RS6000 */
! 795:
! 796:
! 797:
! 798: #else /* !DYNAMIC_LOADING */
! 799:
! 800: #ifdef PCR
! 801:
! 802: # include "il/PCR_IL.h"
! 803: # include "th/PCR_ThCtl.h"
! 804: # include "mm/PCR_MM.h"
! 805:
! 806: void GC_register_dynamic_libraries()
! 807: {
! 808: /* Add new static data areas of dynamically loaded modules. */
! 809: {
! 810: PCR_IL_LoadedFile * p = PCR_IL_GetLastLoadedFile();
! 811: PCR_IL_LoadedSegment * q;
! 812:
! 813: /* Skip uncommited files */
! 814: while (p != NIL && !(p -> lf_commitPoint)) {
! 815: /* The loading of this file has not yet been committed */
! 816: /* Hence its description could be inconsistent. */
! 817: /* Furthermore, it hasn't yet been run. Hence its data */
! 818: /* segments can't possibly reference heap allocated */
! 819: /* objects. */
! 820: p = p -> lf_prev;
! 821: }
! 822: for (; p != NIL; p = p -> lf_prev) {
! 823: for (q = p -> lf_ls; q != NIL; q = q -> ls_next) {
! 824: if ((q -> ls_flags & PCR_IL_SegFlags_Traced_MASK)
! 825: == PCR_IL_SegFlags_Traced_on) {
! 826: GC_add_roots_inner
! 827: ((char *)(q -> ls_addr),
! 828: (char *)(q -> ls_addr) + q -> ls_bytes,
! 829: TRUE);
! 830: }
! 831: }
! 832: }
! 833: }
! 834: }
! 835:
! 836:
! 837: #else /* !PCR */
! 838:
! 839: void GC_register_dynamic_libraries(){}
! 840:
! 841: int GC_no_dynamic_loading;
! 842:
! 843: #endif /* !PCR */
! 844: #endif /* !DYNAMIC_LOADING */
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