Annotation of OpenXM_contrib2/asir2000/gc/dyn_load.c, Revision 1.3
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 */
1.3 ! noro 35: # if (defined(LINUX_THREADS) || defined(SOLARIS_THREADS) \
! 36: || defined(HPUX_THREADS) || defined(IRIX_THREADS)) && defined(dlopen) \
! 37: && !defined(USE_LD_WRAP)
1.1 noro 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)) && \
1.2 noro 52: !defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
1.1 noro 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:
1.3 ! noro 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: }
1.1 noro 189:
190: /* Redefine dlopen to guarantee mutual exclusion with */
191: /* GC_register_dynamic_libraries. */
1.3 ! noro 192: /* Should probably happen for other operating systems, too. */
1.1 noro 193:
1.3 ! noro 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
1.1 noro 203: {
204: void * result;
1.3 ! noro 205: GC_bool dont_gc_save;
1.1 noro 206:
207: # ifndef USE_PROC_FOR_LIBRARIES
1.3 ! noro 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);
1.1 noro 214: # endif
215: # ifndef USE_PROC_FOR_LIBRARIES
1.3 ! noro 216: GC_dont_gc = dont_gc_save;
1.1 noro 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:
1.3 ! noro 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:
1.1 noro 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:
1.3 ! noro 396: #ifndef GC_scratch_last_end_ptr /* Never an extern any more? */
1.1 noro 397: extern ptr_t GC_scratch_last_end_ptr; /* End of GC_scratch_alloc arena */
1.3 ! noro 398: #endif
1.1 noro 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:
1.2 noro 700: #if defined(HPUX)
1.1 noro 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) {
1.2 noro 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
1.1 noro 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: }
1.2 noro 738: # endif
1.1 noro 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: }
1.2 noro 761: #endif /* HPUX */
1.1 noro 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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