Annotation of OpenXM_contrib2/asir2000/gc/dyn_load.c, Revision 1.1.1.1
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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