2 * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
3 * Copyright (c) 1997 by Silicon Graphics. All rights reserved.
5 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
6 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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.
14 * Original author: Bill Janssen
15 * Heavily modified by Hans Boehm and others
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 ...
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.
29 #if defined(__linux__) && !defined(_GNU_SOURCE)
30 /* Can't test LINUX, since this must be define before other includes */
33 #if !defined(MACOS) && !defined(_WIN32_WCE)
34 # include <sys/types.h>
36 #include "private/gc_priv.h"
38 /* BTL: avoid circular redefinition of dlopen if GC_SOLARIS_THREADS defined */
39 # if (defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS)) \
40 && defined(dlopen) && !defined(GC_USE_LD_WRAP)
41 /* To support threads in Solaris, gc.h interposes on dlopen by */
42 /* defining "dlopen" to be "GC_dlopen", which is implemented below. */
43 /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */
44 /* real system dlopen() in their implementation. We first remove */
45 /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
47 # define GC_must_restore_redefined_dlopen
49 # undef GC_must_restore_redefined_dlopen
52 #if (defined(DYNAMIC_LOADING) || defined(MSWIN32) || defined(MSWINCE)) \
54 #if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
55 !defined(MSWIN32) && !defined(MSWINCE) && \
56 !(defined(ALPHA) && defined(OSF1)) && \
57 !defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
58 !defined(RS6000) && !defined(SCO_ELF) && \
59 !(defined(FREEBSD) && defined(__ELF__)) && \
60 !(defined(NETBSD) && defined(__ELF__)) && !defined(HURD)
61 --> We only know how to find data segments of dynamic libraries
for the
62 --> above
. Additional SVR4 variants might
not be too
76 /* struct link_map field overrides */
77 # define l_next lm_next
78 # define l_addr lm_addr
79 # define l_name lm_name
82 #if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
83 (defined(FREEBSD) && defined(__ELF__)) || \
84 (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
90 /* Newer versions of GNU/Linux define this macro. We
91 * define it similarly for any ELF systems that don't. */
93 # if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32
94 # define ElfW(type) Elf32_##type
96 # define ElfW(type) Elf64_##type
100 #if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
106 static struct link_map
*
107 GC_FirstDLOpenedLinkMap()
109 extern ElfW(Dyn
) _DYNAMIC
;
112 static struct link_map
* cachedResult
= 0;
113 static ElfW(Dyn
) *dynStructureAddr
= 0;
114 /* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */
116 # ifdef SUNOS53_SHARED_LIB
117 /* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set */
118 /* up properly in dynamically linked .so's. This means we have */
119 /* to use its value in the set of original object files loaded */
120 /* at program startup. */
121 if( dynStructureAddr
== 0 ) {
122 void* startupSyms
= dlopen(0, RTLD_LAZY
);
123 dynStructureAddr
= (ElfW(Dyn
)*)dlsym(startupSyms
, "_DYNAMIC");
126 dynStructureAddr
= &_DYNAMIC
;
129 if( dynStructureAddr
== 0) {
132 if( cachedResult
== 0 ) {
134 for( dp
= ((ElfW(Dyn
) *)(&_DYNAMIC
)); (tag
= dp
->d_tag
) != 0; dp
++ ) {
135 if( tag
== DT_DEBUG
) {
137 = ((struct r_debug
*)(dp
->d_un
.d_ptr
))->r_map
;
138 if( lm
!= 0 ) cachedResult
= lm
->l_next
; /* might be NIL */
146 #endif /* SUNOS5DL ... */
148 /* BTL: added to fix circular dlopen definition if GC_SOLARIS_THREADS defined */
149 # if defined(GC_must_restore_redefined_dlopen)
150 # define dlopen GC_dlopen
153 #if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES)
156 struct link_dynamic _DYNAMIC
;
159 static struct link_map
*
160 GC_FirstDLOpenedLinkMap()
162 extern struct link_dynamic _DYNAMIC
;
164 if( &_DYNAMIC
== 0) {
167 return(_DYNAMIC
.ld_un
.ld_1
->ld_loaded
);
170 /* Return the address of the ld.so allocated common symbol */
171 /* with the least address, or 0 if none. */
172 static ptr_t
GC_first_common()
175 extern struct link_dynamic _DYNAMIC
;
176 struct rtc_symb
* curr_symbol
;
178 if( &_DYNAMIC
== 0) {
181 curr_symbol
= _DYNAMIC
.ldd
-> ldd_cp
;
182 for (; curr_symbol
!= 0; curr_symbol
= curr_symbol
-> rtc_next
) {
184 || (ptr_t
)(curr_symbol
-> rtc_sp
-> n_value
) < result
) {
185 result
= (ptr_t
)(curr_symbol
-> rtc_sp
-> n_value
);
191 #endif /* SUNOS4 ... */
193 # if defined(SUNOS4) || defined(SUNOS5DL)
194 /* Add dynamic library data sections to the root set. */
195 # if !defined(PCR) && !defined(GC_SOLARIS_THREADS) && defined(THREADS)
197 --> fix mutual exclusion with dlopen
198 # endif /* We assume M3 programs don't call dlopen for now */
201 # ifndef USE_PROC_FOR_LIBRARIES
202 void GC_register_dynamic_libraries()
204 struct link_map
*lm
= GC_FirstDLOpenedLinkMap();
207 for (lm
= GC_FirstDLOpenedLinkMap();
208 lm
!= (struct link_map
*) 0; lm
= lm
->l_next
)
213 e
= (struct exec
*) lm
->lm_addr
;
215 ((char *) (N_DATOFF(*e
) + lm
->lm_addr
)),
216 ((char *) (N_BSSADDR(*e
) + e
->a_bss
+ lm
->lm_addr
)),
222 unsigned long offset
;
226 e
= (ElfW(Ehdr
) *) lm
->l_addr
;
227 p
= ((ElfW(Phdr
) *)(((char *)(e
)) + e
->e_phoff
));
228 offset
= ((unsigned long)(lm
->l_addr
));
229 for( i
= 0; i
< (int)(e
->e_phnum
); ((i
++),(p
++)) ) {
230 switch( p
->p_type
) {
233 if( !(p
->p_flags
& PF_W
) ) break;
234 start
= ((char *)(p
->p_vaddr
)) + offset
;
250 static ptr_t common_start
= 0;
252 extern ptr_t
GC_find_limit();
254 if (common_start
== 0) common_start
= GC_first_common();
255 if (common_start
!= 0) {
256 common_end
= GC_find_limit(common_start
, TRUE
);
257 GC_add_roots_inner((char *)common_start
, (char *)common_end
, TRUE
);
263 # endif /* !USE_PROC ... */
266 #if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
267 (defined(FREEBSD) && defined(__ELF__)) || \
268 (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
271 #ifdef USE_PROC_FOR_LIBRARIES
275 #include <sys/stat.h>
279 #define MAPS_BUF_SIZE (32*1024)
281 extern ssize_t
GC_repeat_read(int fd
, char *buf
, size_t count
);
282 /* Repeatedly read until buffer is filled, or EOF is encountered */
283 /* Defined in os_dep.c. */
285 static char *parse_map_entry(char *buf_ptr
, word
*start
, word
*end
,
286 char *prot_buf
, unsigned int *maj_dev
);
288 void GC_register_dynamic_libraries()
294 char maps_temp
[32768];
299 unsigned int maj_dev
, min_dev
;
300 word least_ha
, greatest_ha
;
302 word datastart
= (word
)(DATASTART
);
304 /* Read /proc/self/maps */
305 /* Note that we may not allocate, and thus can't use stdio. */
306 f
= open("/proc/self/maps", O_RDONLY
);
307 if (-1 == f
) ABORT("Couldn't open /proc/self/maps");
308 /* stat() doesn't work for /proc/self/maps, so we have to
309 read it to find out how large it is... */
312 result
= GC_repeat_read(f
, maps_temp
, sizeof(maps_temp
));
313 if (result
<= 0) ABORT("Couldn't read /proc/self/maps");
315 } while (result
== sizeof(maps_temp
));
317 if (maps_size
> sizeof(maps_temp
)) {
318 /* If larger than our buffer, close and re-read it. */
320 f
= open("/proc/self/maps", O_RDONLY
);
321 if (-1 == f
) ABORT("Couldn't open /proc/self/maps");
322 maps_buf
= alloca(maps_size
);
323 if (NULL
== maps_buf
) ABORT("/proc/self/maps alloca failed");
324 result
= GC_repeat_read(f
, maps_buf
, maps_size
);
325 if (result
<= 0) ABORT("Couldn't read /proc/self/maps");
327 /* Otherwise use the fixed size buffer */
328 maps_buf
= maps_temp
;
332 maps_buf
[result
] = '\0';
334 /* Compute heap bounds. Should be done by add_to_heap? */
335 least_ha
= (word
)(-1);
337 for (i
= 0; i
< GC_n_heap_sects
; ++i
) {
338 word sect_start
= (word
)GC_heap_sects
[i
].hs_start
;
339 word sect_end
= sect_start
+ GC_heap_sects
[i
].hs_bytes
;
340 if (sect_start
< least_ha
) least_ha
= sect_start
;
341 if (sect_end
> greatest_ha
) greatest_ha
= sect_end
;
343 if (greatest_ha
< (word
)GC_scratch_last_end_ptr
)
344 greatest_ha
= (word
)GC_scratch_last_end_ptr
;
347 buf_ptr
= parse_map_entry(buf_ptr
, &start
, &end
, prot_buf
, &maj_dev
);
348 if (buf_ptr
== NULL
) return;
350 if (prot_buf
[1] == 'w') {
351 /* This is a writable mapping. Add it to */
352 /* the root set unless it is already otherwise */
354 if (start
<= (word
)GC_stackbottom
&& end
>= (word
)GC_stackbottom
) {
355 /* Stack mapping; discard */
358 if (start
<= datastart
&& end
> datastart
&& maj_dev
!= 0) {
359 /* Main data segment; discard */
363 if (GC_segment_is_thread_stack(start
, end
)) continue;
365 /* The rest of this assumes that there is no mapping */
366 /* spanning the beginning of the data segment, or extending */
367 /* beyond the entire heap at both ends. */
368 /* Empirically these assumptions hold. */
370 if (start
< (word
)DATAEND
&& end
> (word
)DATAEND
) {
371 /* Rld may use space at the end of the main data */
372 /* segment. Thus we add that in. */
373 start
= (word
)DATAEND
;
375 if (start
< least_ha
&& end
> least_ha
) {
378 if (start
< greatest_ha
&& end
> greatest_ha
) {
381 if (start
>= least_ha
&& end
<= greatest_ha
) continue;
382 GC_add_roots_inner((char *)start
, (char *)end
, TRUE
);
388 // parse_map_entry parses an entry from /proc/self/maps so we can
389 // locate all writable data segments that belong to shared libraries.
390 // The format of one of these entries and the fields we care about
392 // XXXXXXXX-XXXXXXXX r-xp 00000000 30:05 260537 name of mapping...\n
393 // ^^^^^^^^ ^^^^^^^^ ^^^^ ^^
394 // start end prot maj_dev
397 // The parser is called with a pointer to the entry and the return value
398 // is either NULL or is advanced to the next entry(the byte after the
401 #define OFFSET_MAP_START 0
402 #define OFFSET_MAP_END 9
403 #define OFFSET_MAP_PROT 18
404 #define OFFSET_MAP_MAJDEV 32
406 static char *parse_map_entry(char *buf_ptr
, word
*start
, word
*end
,
407 char *prot_buf
, unsigned int *maj_dev
)
413 if (buf_ptr
== NULL
|| *buf_ptr
== '\0') {
417 memcpy(prot_buf
, buf_ptr
+OFFSET_MAP_PROT
, 4); // do the protections first
420 if (prot_buf
[1] == 'w') { // we can skip all of this if it's not writable
423 buf_ptr
[OFFSET_MAP_START
+8] = '\0';
424 *start
= strtoul(tok
, NULL
, 16);
426 tok
= buf_ptr
+OFFSET_MAP_END
;
427 buf_ptr
[OFFSET_MAP_END
+8] = '\0';
428 *end
= strtoul(tok
, NULL
, 16);
430 buf_ptr
+= OFFSET_MAP_MAJDEV
;
432 while (*buf_ptr
!= ':') buf_ptr
++;
434 *maj_dev
= strtoul(tok
, NULL
, 16);
437 while (*buf_ptr
&& *buf_ptr
++ != '\n');
442 #endif /* USE_PROC_FOR_LIBRARIES */
444 #if !defined(USE_PROC_FOR_LIBRARIES)
445 /* The following is the preferred way to walk dynamic libraries */
446 /* For glibc 2.2.4+. Unfortunately, it doesn't work for older */
447 /* versions. Thanks to Jakub Jelinek for most of the code. */
449 # if defined(LINUX) /* Are others OK here, too? */ \
450 && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
451 || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
453 /* We have the header files for a glibc that includes dl_iterate_phdr. */
454 /* It may still not be available in the library on the target system. */
455 /* Thus we also treat it as a weak symbol. */
456 #define HAVE_DL_ITERATE_PHDR
458 static int GC_register_dynlib_callback(info
, size
, ptr
)
459 struct dl_phdr_info
* info
;
463 const ElfW(Phdr
) * p
;
467 /* Make sure struct dl_phdr_info is at least as big as we need. */
468 if (size
< offsetof (struct dl_phdr_info
, dlpi_phnum
)
469 + sizeof (info
->dlpi_phnum
))
472 /* Skip the first object - it is the main program. */
473 if (*(int *)ptr
== 0)
480 for( i
= 0; i
< (int)(info
->dlpi_phnum
); ((i
++),(p
++)) ) {
481 switch( p
->p_type
) {
484 if( !(p
->p_flags
& PF_W
) ) break;
485 start
= ((char *)(p
->p_vaddr
)) + info
->dlpi_addr
;
486 GC_add_roots_inner(start
, start
+ p
->p_memsz
, TRUE
);
497 /* Return TRUE if we succeed, FALSE if dl_iterate_phdr wasn't there. */
499 #pragma weak dl_iterate_phdr
501 GC_bool
GC_register_dynamic_libraries_dl_iterate_phdr()
505 if (dl_iterate_phdr
) {
506 dl_iterate_phdr(GC_register_dynlib_callback
, &tmp
);
513 # else /* !LINUX || version(glibc) < 2.2.4 */
515 /* Dynamic loading code for Linux running ELF. Somewhat tested on
516 * Linux/x86, untested but hopefully should work on Linux/Alpha.
517 * This code was derived from the Solaris/ELF support. Thanks to
518 * whatever kind soul wrote that. - Patrick Bridges */
520 /* This doesn't necessarily work in all cases, e.g. with preloaded
521 * dynamic libraries. */
524 # include <sys/exec_elf.h>
532 static struct link_map
*
533 GC_FirstDLOpenedLinkMap()
536 # pragma weak _DYNAMIC
538 extern ElfW(Dyn
) _DYNAMIC
[];
541 static struct link_map
*cachedResult
= 0;
546 if( cachedResult
== 0 ) {
548 for( dp
= _DYNAMIC
; (tag
= dp
->d_tag
) != 0; dp
++ ) {
549 if( tag
== DT_DEBUG
) {
551 = ((struct r_debug
*)(dp
->d_un
.d_ptr
))->r_map
;
552 if( lm
!= 0 ) cachedResult
= lm
->l_next
; /* might be NIL */
561 void GC_register_dynamic_libraries()
566 # ifdef HAVE_DL_ITERATE_PHDR
567 if (GC_register_dynamic_libraries_dl_iterate_phdr()) {
571 lm
= GC_FirstDLOpenedLinkMap();
572 for (lm
= GC_FirstDLOpenedLinkMap();
573 lm
!= (struct link_map
*) 0; lm
= lm
->l_next
)
577 unsigned long offset
;
581 e
= (ElfW(Ehdr
) *) lm
->l_addr
;
582 p
= ((ElfW(Phdr
) *)(((char *)(e
)) + e
->e_phoff
));
583 offset
= ((unsigned long)(lm
->l_addr
));
584 for( i
= 0; i
< (int)(e
->e_phnum
); ((i
++),(p
++)) ) {
585 switch( p
->p_type
) {
588 if( !(p
->p_flags
& PF_W
) ) break;
589 start
= ((char *)(p
->p_vaddr
)) + offset
;
590 GC_add_roots_inner(start
, start
+ p
->p_memsz
, TRUE
);
600 #endif /* !USE_PROC_FOR_LIBRARIES */
604 #if defined(IRIX5) || (defined(USE_PROC_FOR_LIBRARIES) && !defined(LINUX))
606 #include <sys/procfs.h>
607 #include <sys/stat.h>
611 #include <signal.h> /* Only for the following test. */
616 extern void * GC_roots_present();
617 /* The type is a lie, since the real type doesn't make sense here, */
618 /* and we only test for NULL. */
620 /* We use /proc to track down all parts of the address space that are */
621 /* mapped by the process, and throw out regions we know we shouldn't */
622 /* worry about. This may also work under other SVR4 variants. */
623 void GC_register_dynamic_libraries()
627 static prmap_t
* addr_map
= 0;
628 static int current_sz
= 0; /* Number of records currently in addr_map */
629 static int needed_sz
; /* Required size of addr_map */
632 register ptr_t start
;
633 register ptr_t limit
;
634 ptr_t heap_start
= (ptr_t
)HEAP_START
;
635 ptr_t heap_end
= heap_start
;
639 # endif /* SUNOS5DL */
642 sprintf(buf
, "/proc/%d", getpid());
643 /* The above generates a lint complaint, since pid_t varies. */
644 /* It's unclear how to improve this. */
645 fd
= open(buf
, O_RDONLY
);
647 ABORT("/proc open failed");
650 if (ioctl(fd
, PIOCNMAP
, &needed_sz
) < 0) {
651 GC_err_printf2("fd = %d, errno = %d\n", fd
, errno
);
652 ABORT("/proc PIOCNMAP ioctl failed");
654 if (needed_sz
>= current_sz
) {
655 current_sz
= needed_sz
* 2 + 1;
656 /* Expansion, plus room for 0 record */
657 addr_map
= (prmap_t
*)GC_scratch_alloc((word
)
658 (current_sz
* sizeof(prmap_t
)));
660 if (ioctl(fd
, PIOCMAP
, addr_map
) < 0) {
661 GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n",
662 fd
, errno
, needed_sz
, addr_map
);
663 ABORT("/proc PIOCMAP ioctl failed");
665 if (GC_n_heap_sects
> 0) {
666 heap_end
= GC_heap_sects
[GC_n_heap_sects
-1].hs_start
667 + GC_heap_sects
[GC_n_heap_sects
-1].hs_bytes
;
668 if (heap_end
< GC_scratch_last_end_ptr
) heap_end
= GC_scratch_last_end_ptr
;
670 for (i
= 0; i
< needed_sz
; i
++) {
671 flags
= addr_map
[i
].pr_mflags
;
672 if ((flags
& (MA_BREAK
| MA_STACK
| MA_PHYS
)) != 0) goto irrelevant
;
673 if ((flags
& (MA_READ
| MA_WRITE
)) != (MA_READ
| MA_WRITE
))
675 /* The latter test is empirically useless in very old Irix */
676 /* versions. Other than the */
677 /* main data and stack segments, everything appears to be */
678 /* mapped readable, writable, executable, and shared(!!). */
679 /* This makes no sense to me. - HB */
680 start
= (ptr_t
)(addr_map
[i
].pr_vaddr
);
681 if (GC_roots_present(start
)) goto irrelevant
;
682 if (start
< heap_end
&& start
>= heap_start
)
685 if (GC_is_thread_stack(start
)) goto irrelevant
;
686 # endif /* MMAP_STACKS */
688 limit
= start
+ addr_map
[i
].pr_size
;
689 /* The following seemed to be necessary for very old versions */
690 /* of Irix, but it has been reported to discard relevant */
691 /* segments under Irix 6.5. */
693 if (addr_map
[i
].pr_off
== 0 && strncmp(start
, ELFMAG
, 4) == 0) {
694 /* Discard text segments, i.e. 0-offset mappings against */
695 /* executable files which appear to have ELF headers. */
698 # define MAP_IRR_SZ 10
699 static ptr_t map_irr
[MAP_IRR_SZ
];
700 /* Known irrelevant map entries */
701 static int n_irr
= 0;
705 for (i
= 0; i
< n_irr
; i
++) {
706 if (map_irr
[i
] == start
) goto irrelevant
;
708 arg
= (caddr_t
)start
;
709 obj
= ioctl(fd
, PIOCOPENM
, &arg
);
713 if ((buf
.st_mode
& 0111) != 0) {
714 if (n_irr
< MAP_IRR_SZ
) {
715 map_irr
[n_irr
++] = start
;
722 GC_add_roots_inner(start
, limit
, TRUE
);
725 /* Dont keep cached descriptor, for now. Some kernels don't like us */
726 /* to keep a /proc file descriptor around during kill -9. */
727 if (close(fd
) < 0) ABORT("Couldnt close /proc file");
731 # endif /* USE_PROC || IRIX5 */
733 # if defined(MSWIN32) || defined(MSWINCE)
735 # define WIN32_LEAN_AND_MEAN
737 # include <windows.h>
740 /* We traverse the entire address space and register all segments */
741 /* that could possibly have been written to. */
743 extern GC_bool
GC_is_heap_base (ptr_t p
);
745 # ifdef GC_WIN32_THREADS
746 extern void GC_get_next_stack(char *start
, char **lo
, char **hi
);
747 void GC_cond_add_roots(char *base
, char * limit
)
749 char * curr_base
= base
;
750 char * next_stack_lo
;
751 char * next_stack_hi
;
753 if (base
== limit
) return;
755 GC_get_next_stack(curr_base
, &next_stack_lo
, &next_stack_hi
);
756 if (next_stack_lo
>= limit
) break;
757 GC_add_roots_inner(curr_base
, next_stack_lo
, TRUE
);
758 curr_base
= next_stack_hi
;
760 if (curr_base
< limit
) GC_add_roots_inner(curr_base
, limit
, TRUE
);
763 void GC_cond_add_roots(char *base
, char * limit
)
767 = (char *) ((word
)(&dummy
) & ~(GC_sysinfo
.dwAllocationGranularity
-1));
768 if (base
== limit
) return;
769 if (limit
> stack_top
&& base
< GC_stackbottom
) {
770 /* Part of the stack; ignore it. */
773 GC_add_roots_inner(base
, limit
, TRUE
);
778 extern GC_bool GC_win32s
;
781 void GC_register_dynamic_libraries()
783 MEMORY_BASIC_INFORMATION buf
;
788 char * limit
, * new_limit
;
791 if (GC_win32s
) return;
793 base
= limit
= p
= GC_sysinfo
.lpMinimumApplicationAddress
;
794 # if defined(MSWINCE) && !defined(_WIN32_WCE_EMULATION)
795 /* Only the first 32 MB of address space belongs to the current process */
796 while (p
< (LPVOID
)0x02000000) {
797 result
= VirtualQuery(p
, &buf
, sizeof(buf
));
799 /* Page is free; advance to the next possible allocation base */
801 (((DWORD
) p
+ GC_sysinfo
.dwAllocationGranularity
)
802 & ~(GC_sysinfo
.dwAllocationGranularity
-1));
805 while (p
< GC_sysinfo
.lpMaximumApplicationAddress
) {
806 result
= VirtualQuery(p
, &buf
, sizeof(buf
));
809 if (result
!= sizeof(buf
)) {
810 ABORT("Weird VirtualQuery result");
812 new_limit
= (char *)p
+ buf
.RegionSize
;
813 protect
= buf
.Protect
;
814 if (buf
.State
== MEM_COMMIT
815 && (protect
== PAGE_EXECUTE_READWRITE
816 || protect
== PAGE_READWRITE
)
817 && !GC_is_heap_base(buf
.AllocationBase
)) {
818 if ((char *)p
!= limit
) {
819 GC_cond_add_roots(base
, limit
);
825 if (p
> (LPVOID
)new_limit
/* overflow */) break;
826 p
= (LPVOID
)new_limit
;
828 GC_cond_add_roots(base
, limit
);
831 #endif /* MSWIN32 || MSWINCE */
833 #if defined(ALPHA) && defined(OSF1)
837 void GC_register_dynamic_libraries()
843 ldr_module_t moduleid
= LDR_NULL_MODULE
;
844 ldr_module_info_t moduleinfo
;
845 size_t moduleinfosize
= sizeof(moduleinfo
);
846 size_t modulereturnsize
;
850 ldr_region_info_t regioninfo
;
851 size_t regioninfosize
= sizeof(regioninfo
);
852 size_t regionreturnsize
;
854 /* Obtain id of this process */
855 mypid
= ldr_my_process();
857 /* For each module */
860 /* Get the next (first) module */
861 status
= ldr_next_module(mypid
, &moduleid
);
863 /* Any more modules? */
864 if (moduleid
== LDR_NULL_MODULE
)
865 break; /* No more modules */
867 /* Check status AFTER checking moduleid because */
868 /* of a bug in the non-shared ldr_next_module stub */
870 GC_printf1("dynamic_load: status = %ld\n", (long)status
);
872 extern char *sys_errlist
[];
875 if (errno
<= sys_nerr
) {
876 GC_printf1("dynamic_load: %s\n", (long)sys_errlist
[errno
]);
878 GC_printf1("dynamic_load: %d\n", (long)errno
);
881 ABORT("ldr_next_module failed");
884 /* Get the module information */
885 status
= ldr_inq_module(mypid
, moduleid
, &moduleinfo
,
886 moduleinfosize
, &modulereturnsize
);
888 ABORT("ldr_inq_module failed");
890 /* is module for the main program (i.e. nonshared portion)? */
891 if (moduleinfo
.lmi_flags
& LDR_MAIN
)
892 continue; /* skip the main module */
895 GC_printf("---Module---\n");
896 GC_printf("Module ID = %16ld\n", moduleinfo
.lmi_modid
);
897 GC_printf("Count of regions = %16d\n", moduleinfo
.lmi_nregion
);
898 GC_printf("flags for module = %16lx\n", moduleinfo
.lmi_flags
);
899 GC_printf("pathname of module = \"%s\"\n", moduleinfo
.lmi_name
);
902 /* For each region in this module */
903 for (region
= 0; region
< moduleinfo
.lmi_nregion
; region
++) {
905 /* Get the region information */
906 status
= ldr_inq_region(mypid
, moduleid
, region
, ®ioninfo
,
907 regioninfosize
, ®ionreturnsize
);
909 ABORT("ldr_inq_region failed");
911 /* only process writable (data) regions */
912 if (! (regioninfo
.lri_prot
& LDR_W
))
916 GC_printf("--- Region ---\n");
917 GC_printf("Region number = %16ld\n",
918 regioninfo
.lri_region_no
);
919 GC_printf("Protection flags = %016x\n", regioninfo
.lri_prot
);
920 GC_printf("Virtual address = %16p\n", regioninfo
.lri_vaddr
);
921 GC_printf("Mapped address = %16p\n", regioninfo
.lri_mapaddr
);
922 GC_printf("Region size = %16ld\n", regioninfo
.lri_size
);
923 GC_printf("Region name = \"%s\"\n", regioninfo
.lri_name
);
926 /* register region as a garbage collection root */
928 (char *)regioninfo
.lri_mapaddr
,
929 (char *)regioninfo
.lri_mapaddr
+ regioninfo
.lri_size
,
943 extern char *sys_errlist
[];
946 void GC_register_dynamic_libraries()
949 int index
= 1; /* Ordinal position in shared library search list */
950 struct shl_descriptor
*shl_desc
; /* Shared library info, see dl.h */
952 /* For each dynamic library loaded */
955 /* Get info about next shared library */
956 status
= shl_get(index
, &shl_desc
);
958 /* Check if this is the end of the list or if some error occured */
960 # ifdef GC_HPUX_THREADS
961 /* I've seen errno values of 0. The man page is not clear */
962 /* as to whether errno should get set on a -1 return. */
965 if (errno
== EINVAL
) {
966 break; /* Moved past end of shared library list --> finished */
968 if (errno
<= sys_nerr
) {
969 GC_printf1("dynamic_load: %s\n", (long) sys_errlist
[errno
]);
971 GC_printf1("dynamic_load: %d\n", (long) errno
);
973 ABORT("shl_get failed");
979 GC_printf0("---Shared library---\n");
980 GC_printf1("\tfilename = \"%s\"\n", shl_desc
->filename
);
981 GC_printf1("\tindex = %d\n", index
);
982 GC_printf1("\thandle = %08x\n",
983 (unsigned long) shl_desc
->handle
);
984 GC_printf1("\ttext seg. start = %08x\n", shl_desc
->tstart
);
985 GC_printf1("\ttext seg. end = %08x\n", shl_desc
->tend
);
986 GC_printf1("\tdata seg. start = %08x\n", shl_desc
->dstart
);
987 GC_printf1("\tdata seg. end = %08x\n", shl_desc
->dend
);
988 GC_printf1("\tref. count = %lu\n", shl_desc
->ref_count
);
991 /* register shared library's data segment as a garbage collection root */
992 GC_add_roots_inner((char *) shl_desc
->dstart
,
993 (char *) shl_desc
->dend
, TRUE
);
1002 #include <sys/ldr.h>
1003 #include <sys/errno.h>
1004 void GC_register_dynamic_libraries()
1009 struct ld_info
*ldi
;
1011 ldibuf
= alloca(ldibuflen
= 8192);
1013 while ( (len
= loadquery(L_GETINFO
,ldibuf
,ldibuflen
)) < 0) {
1014 if (errno
!= ENOMEM
) {
1015 ABORT("loadquery failed");
1017 ldibuf
= alloca(ldibuflen
*= 2);
1020 ldi
= (struct ld_info
*)ldibuf
;
1022 len
= ldi
->ldinfo_next
;
1024 ldi
->ldinfo_dataorg
,
1025 (unsigned long)ldi
->ldinfo_dataorg
1026 + ldi
->ldinfo_datasize
,
1028 ldi
= len
? (struct ld_info
*)((char *)ldi
+ len
) : 0;
1035 #else /* !DYNAMIC_LOADING */
1039 # include "il/PCR_IL.h"
1040 # include "th/PCR_ThCtl.h"
1041 # include "mm/PCR_MM.h"
1043 void GC_register_dynamic_libraries()
1045 /* Add new static data areas of dynamically loaded modules. */
1047 PCR_IL_LoadedFile
* p
= PCR_IL_GetLastLoadedFile();
1048 PCR_IL_LoadedSegment
* q
;
1050 /* Skip uncommited files */
1051 while (p
!= NIL
&& !(p
-> lf_commitPoint
)) {
1052 /* The loading of this file has not yet been committed */
1053 /* Hence its description could be inconsistent. */
1054 /* Furthermore, it hasn't yet been run. Hence its data */
1055 /* segments can't possibly reference heap allocated */
1059 for (; p
!= NIL
; p
= p
-> lf_prev
) {
1060 for (q
= p
-> lf_ls
; q
!= NIL
; q
= q
-> ls_next
) {
1061 if ((q
-> ls_flags
& PCR_IL_SegFlags_Traced_MASK
)
1062 == PCR_IL_SegFlags_Traced_on
) {
1064 ((char *)(q
-> ls_addr
),
1065 (char *)(q
-> ls_addr
) + q
-> ls_bytes
,
1076 void GC_register_dynamic_libraries(){}
1078 int GC_no_dynamic_loading
;
1081 #endif /* !DYNAMIC_LOADING */