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