+++ /dev/null
-/*
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- * Copyright (c) 1997 by Silicon Graphics. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- * Original author: Bill Janssen
- * Heavily modified by Hans Boehm and others
- */
-
-/*
- * This is incredibly OS specific code for tracking down data sections in
- * dynamic libraries. There appears to be no way of doing this quickly
- * without groveling through undocumented data structures. We would argue
- * that this is a bug in the design of the dlopen interface. THIS CODE
- * MAY BREAK IN FUTURE OS RELEASES. If this matters to you, don't hesitate
- * to let your vendor know ...
- *
- * None of this is safe with dlclose and incremental collection.
- * But then not much of anything is safe in the presence of dlclose.
- */
-#if defined(__linux__) && !defined(_GNU_SOURCE)
- /* Can't test LINUX, since this must be define before other includes */
-# define _GNU_SOURCE
-#endif
-#if !defined(MACOS) && !defined(_WIN32_WCE)
-# include <sys/types.h>
-#endif
-#include "private/gc_priv.h"
-
-/* BTL: avoid circular redefinition of dlopen if GC_SOLARIS_THREADS defined */
-# if (defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS)) \
- && defined(dlopen) && !defined(GC_USE_LD_WRAP)
- /* To support threads in Solaris, gc.h interposes on dlopen by */
- /* defining "dlopen" to be "GC_dlopen", which is implemented below. */
- /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */
- /* real system dlopen() in their implementation. We first remove */
- /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
-# undef dlopen
-# define GC_must_restore_redefined_dlopen
-# else
-# undef GC_must_restore_redefined_dlopen
-# endif
-
-#if (defined(DYNAMIC_LOADING) || defined(MSWIN32) || defined(MSWINCE)) \
- && !defined(PCR)
-#if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
- !defined(MSWIN32) && !defined(MSWINCE) && \
- !(defined(ALPHA) && defined(OSF1)) && \
- !defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
- !defined(RS6000) && !defined(SCO_ELF) && \
- !(defined(FREEBSD) && defined(__ELF__)) && \
- !(defined(NETBSD) && defined(__ELF__)) && !defined(HURD)
- --> We only know how to find data segments of dynamic libraries for the
- --> above. Additional SVR4 variants might not be too
- --> hard to add.
-#endif
-
-#include <stdio.h>
-#ifdef SUNOS5DL
-# include <sys/elf.h>
-# include <dlfcn.h>
-# include <link.h>
-#endif
-#ifdef SUNOS4
-# include <dlfcn.h>
-# include <link.h>
-# include <a.out.h>
- /* struct link_map field overrides */
-# define l_next lm_next
-# define l_addr lm_addr
-# define l_name lm_name
-#endif
-
-#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
- (defined(FREEBSD) && defined(__ELF__)) || \
- (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
-# include <stddef.h>
-# include <elf.h>
-# include <link.h>
-#endif
-
-/* Newer versions of GNU/Linux define this macro. We
- * define it similarly for any ELF systems that don't. */
-# ifndef ElfW
-# if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32
-# define ElfW(type) Elf32_##type
-# else
-# define ElfW(type) Elf64_##type
-# endif
-# endif
-
-#if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
-
-#ifdef LINT
- Elf32_Dyn _DYNAMIC;
-#endif
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
- extern ElfW(Dyn) _DYNAMIC;
- ElfW(Dyn) *dp;
- struct r_debug *r;
- static struct link_map * cachedResult = 0;
- static ElfW(Dyn) *dynStructureAddr = 0;
- /* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */
-
-# ifdef SUNOS53_SHARED_LIB
- /* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set */
- /* up properly in dynamically linked .so's. This means we have */
- /* to use its value in the set of original object files loaded */
- /* at program startup. */
- if( dynStructureAddr == 0 ) {
- void* startupSyms = dlopen(0, RTLD_LAZY);
- dynStructureAddr = (ElfW(Dyn)*)dlsym(startupSyms, "_DYNAMIC");
- }
-# else
- dynStructureAddr = &_DYNAMIC;
-# endif
-
- if( dynStructureAddr == 0) {
- return(0);
- }
- if( cachedResult == 0 ) {
- int tag;
- for( dp = ((ElfW(Dyn) *)(&_DYNAMIC)); (tag = dp->d_tag) != 0; dp++ ) {
- if( tag == DT_DEBUG ) {
- struct link_map *lm
- = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
- if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
- break;
- }
- }
- }
- return cachedResult;
-}
-
-#endif /* SUNOS5DL ... */
-
-/* BTL: added to fix circular dlopen definition if GC_SOLARIS_THREADS defined */
-# if defined(GC_must_restore_redefined_dlopen)
-# define dlopen GC_dlopen
-# endif
-
-#if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES)
-
-#ifdef LINT
- struct link_dynamic _DYNAMIC;
-#endif
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
- extern struct link_dynamic _DYNAMIC;
-
- if( &_DYNAMIC == 0) {
- return(0);
- }
- return(_DYNAMIC.ld_un.ld_1->ld_loaded);
-}
-
-/* Return the address of the ld.so allocated common symbol */
-/* with the least address, or 0 if none. */
-static ptr_t GC_first_common()
-{
- ptr_t result = 0;
- extern struct link_dynamic _DYNAMIC;
- struct rtc_symb * curr_symbol;
-
- if( &_DYNAMIC == 0) {
- return(0);
- }
- curr_symbol = _DYNAMIC.ldd -> ldd_cp;
- for (; curr_symbol != 0; curr_symbol = curr_symbol -> rtc_next) {
- if (result == 0
- || (ptr_t)(curr_symbol -> rtc_sp -> n_value) < result) {
- result = (ptr_t)(curr_symbol -> rtc_sp -> n_value);
- }
- }
- return(result);
-}
-
-#endif /* SUNOS4 ... */
-
-# if defined(SUNOS4) || defined(SUNOS5DL)
-/* Add dynamic library data sections to the root set. */
-# if !defined(PCR) && !defined(GC_SOLARIS_THREADS) && defined(THREADS)
-# ifndef SRC_M3
- --> fix mutual exclusion with dlopen
-# endif /* We assume M3 programs don't call dlopen for now */
-# endif
-
-# ifndef USE_PROC_FOR_LIBRARIES
-void GC_register_dynamic_libraries()
-{
- struct link_map *lm = GC_FirstDLOpenedLinkMap();
-
-
- for (lm = GC_FirstDLOpenedLinkMap();
- lm != (struct link_map *) 0; lm = lm->l_next)
- {
-# ifdef SUNOS4
- struct exec *e;
-
- e = (struct exec *) lm->lm_addr;
- GC_add_roots_inner(
- ((char *) (N_DATOFF(*e) + lm->lm_addr)),
- ((char *) (N_BSSADDR(*e) + e->a_bss + lm->lm_addr)),
- TRUE);
-# endif
-# ifdef SUNOS5DL
- ElfW(Ehdr) * e;
- ElfW(Phdr) * p;
- unsigned long offset;
- char * start;
- register int i;
-
- e = (ElfW(Ehdr) *) lm->l_addr;
- p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
- offset = ((unsigned long)(lm->l_addr));
- for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
- switch( p->p_type ) {
- case PT_LOAD:
- {
- if( !(p->p_flags & PF_W) ) break;
- start = ((char *)(p->p_vaddr)) + offset;
- GC_add_roots_inner(
- start,
- start + p->p_memsz,
- TRUE
- );
- }
- break;
- default:
- break;
- }
- }
-# endif
- }
-# ifdef SUNOS4
- {
- static ptr_t common_start = 0;
- ptr_t common_end;
- extern ptr_t GC_find_limit();
-
- if (common_start == 0) common_start = GC_first_common();
- if (common_start != 0) {
- common_end = GC_find_limit(common_start, TRUE);
- GC_add_roots_inner((char *)common_start, (char *)common_end, TRUE);
- }
- }
-# endif
-}
-
-# endif /* !USE_PROC ... */
-# endif /* SUNOS */
-
-#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
- (defined(FREEBSD) && defined(__ELF__)) || \
- (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
-
-
-#ifdef USE_PROC_FOR_LIBRARIES
-
-#include <string.h>
-
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#define MAPS_BUF_SIZE (32*1024)
-
-extern ssize_t GC_repeat_read(int fd, char *buf, size_t count);
- /* Repeatedly read until buffer is filled, or EOF is encountered */
- /* Defined in os_dep.c. */
-
-static char *parse_map_entry(char *buf_ptr, word *start, word *end,
- char *prot_buf, unsigned int *maj_dev);
-
-void GC_register_dynamic_libraries()
-{
- int f;
- int result;
- char prot_buf[5];
- int maps_size;
- char maps_temp[32768];
- char *maps_buf;
- char *buf_ptr;
- int count;
- word start, end;
- unsigned int maj_dev, min_dev;
- word least_ha, greatest_ha;
- unsigned i;
- word datastart = (word)(DATASTART);
-
- /* Read /proc/self/maps */
- /* Note that we may not allocate, and thus can't use stdio. */
- f = open("/proc/self/maps", O_RDONLY);
- if (-1 == f) ABORT("Couldn't open /proc/self/maps");
- /* stat() doesn't work for /proc/self/maps, so we have to
- read it to find out how large it is... */
- maps_size = 0;
- do {
- result = GC_repeat_read(f, maps_temp, sizeof(maps_temp));
- if (result <= 0) ABORT("Couldn't read /proc/self/maps");
- maps_size += result;
- } while (result == sizeof(maps_temp));
-
- if (maps_size > sizeof(maps_temp)) {
- /* If larger than our buffer, close and re-read it. */
- close(f);
- f = open("/proc/self/maps", O_RDONLY);
- if (-1 == f) ABORT("Couldn't open /proc/self/maps");
- maps_buf = alloca(maps_size);
- if (NULL == maps_buf) ABORT("/proc/self/maps alloca failed");
- result = GC_repeat_read(f, maps_buf, maps_size);
- if (result <= 0) ABORT("Couldn't read /proc/self/maps");
- } else {
- /* Otherwise use the fixed size buffer */
- maps_buf = maps_temp;
- }
-
- close(f);
- maps_buf[result] = '\0';
- buf_ptr = maps_buf;
- /* Compute heap bounds. Should be done by add_to_heap? */
- least_ha = (word)(-1);
- greatest_ha = 0;
- for (i = 0; i < GC_n_heap_sects; ++i) {
- word sect_start = (word)GC_heap_sects[i].hs_start;
- word sect_end = sect_start + GC_heap_sects[i].hs_bytes;
- if (sect_start < least_ha) least_ha = sect_start;
- if (sect_end > greatest_ha) greatest_ha = sect_end;
- }
- if (greatest_ha < (word)GC_scratch_last_end_ptr)
- greatest_ha = (word)GC_scratch_last_end_ptr;
- for (;;) {
-
- buf_ptr = parse_map_entry(buf_ptr, &start, &end, prot_buf, &maj_dev);
- if (buf_ptr == NULL) return;
-
- if (prot_buf[1] == 'w') {
- /* This is a writable mapping. Add it to */
- /* the root set unless it is already otherwise */
- /* accounted for. */
- if (start <= (word)GC_stackbottom && end >= (word)GC_stackbottom) {
- /* Stack mapping; discard */
- continue;
- }
- if (start <= datastart && end > datastart && maj_dev != 0) {
- /* Main data segment; discard */
- continue;
- }
-# ifdef THREADS
- if (GC_segment_is_thread_stack(start, end)) continue;
-# endif
- /* The rest of this assumes that there is no mapping */
- /* spanning the beginning of the data segment, or extending */
- /* beyond the entire heap at both ends. */
- /* Empirically these assumptions hold. */
-
- if (start < (word)DATAEND && end > (word)DATAEND) {
- /* Rld may use space at the end of the main data */
- /* segment. Thus we add that in. */
- start = (word)DATAEND;
- }
- if (start < least_ha && end > least_ha) {
- end = least_ha;
- }
- if (start < greatest_ha && end > greatest_ha) {
- start = greatest_ha;
- }
- if (start >= least_ha && end <= greatest_ha) continue;
- GC_add_roots_inner((char *)start, (char *)end, TRUE);
- }
- }
-}
-
-//
-// parse_map_entry parses an entry from /proc/self/maps so we can
-// locate all writable data segments that belong to shared libraries.
-// The format of one of these entries and the fields we care about
-// is as follows:
-// XXXXXXXX-XXXXXXXX r-xp 00000000 30:05 260537 name of mapping...\n
-// ^^^^^^^^ ^^^^^^^^ ^^^^ ^^
-// start end prot maj_dev
-// 0 9 18 32
-//
-// The parser is called with a pointer to the entry and the return value
-// is either NULL or is advanced to the next entry(the byte after the
-// trailing '\n'.)
-//
-#define OFFSET_MAP_START 0
-#define OFFSET_MAP_END 9
-#define OFFSET_MAP_PROT 18
-#define OFFSET_MAP_MAJDEV 32
-
-static char *parse_map_entry(char *buf_ptr, word *start, word *end,
- char *prot_buf, unsigned int *maj_dev)
-{
- int i;
- unsigned int val;
- char *tok;
-
- if (buf_ptr == NULL || *buf_ptr == '\0') {
- return NULL;
- }
-
- memcpy(prot_buf, buf_ptr+OFFSET_MAP_PROT, 4); // do the protections first
- prot_buf[4] = '\0';
-
- if (prot_buf[1] == 'w') { // we can skip all of this if it's not writable
-
- tok = buf_ptr;
- buf_ptr[OFFSET_MAP_START+8] = '\0';
- *start = strtoul(tok, NULL, 16);
-
- tok = buf_ptr+OFFSET_MAP_END;
- buf_ptr[OFFSET_MAP_END+8] = '\0';
- *end = strtoul(tok, NULL, 16);
-
- buf_ptr += OFFSET_MAP_MAJDEV;
- tok = buf_ptr;
- while (*buf_ptr != ':') buf_ptr++;
- *buf_ptr++ = '\0';
- *maj_dev = strtoul(tok, NULL, 16);
- }
-
- while (*buf_ptr && *buf_ptr++ != '\n');
-
- return buf_ptr;
-}
-
-#endif /* USE_PROC_FOR_LIBRARIES */
-
-#if !defined(USE_PROC_FOR_LIBRARIES)
-/* The following is the preferred way to walk dynamic libraries */
-/* For glibc 2.2.4+. Unfortunately, it doesn't work for older */
-/* versions. Thanks to Jakub Jelinek for most of the code. */
-
-# if defined(LINUX) /* Are others OK here, too? */ \
- && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
- || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
-
-/* We have the header files for a glibc that includes dl_iterate_phdr. */
-/* It may still not be available in the library on the target system. */
-/* Thus we also treat it as a weak symbol. */
-#define HAVE_DL_ITERATE_PHDR
-
-static int GC_register_dynlib_callback(info, size, ptr)
- struct dl_phdr_info * info;
- size_t size;
- void * ptr;
-{
- const ElfW(Phdr) * p;
- char * start;
- register int i;
-
- /* Make sure struct dl_phdr_info is at least as big as we need. */
- if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
- + sizeof (info->dlpi_phnum))
- return -1;
-
- /* Skip the first object - it is the main program. */
- if (*(int *)ptr == 0)
- {
- *(int *)ptr = 1;
- return 0;
- }
-
- p = info->dlpi_phdr;
- for( i = 0; i < (int)(info->dlpi_phnum); ((i++),(p++)) ) {
- switch( p->p_type ) {
- case PT_LOAD:
- {
- if( !(p->p_flags & PF_W) ) break;
- start = ((char *)(p->p_vaddr)) + info->dlpi_addr;
- GC_add_roots_inner(start, start + p->p_memsz, TRUE);
- }
- break;
- default:
- break;
- }
- }
-
- return 0;
-}
-
-/* Return TRUE if we succeed, FALSE if dl_iterate_phdr wasn't there. */
-
-#pragma weak dl_iterate_phdr
-
-GC_bool GC_register_dynamic_libraries_dl_iterate_phdr()
-{
- int tmp = 0;
-
- if (dl_iterate_phdr) {
- dl_iterate_phdr(GC_register_dynlib_callback, &tmp);
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-# else /* !LINUX || version(glibc) < 2.2.4 */
-
-/* Dynamic loading code for Linux running ELF. Somewhat tested on
- * Linux/x86, untested but hopefully should work on Linux/Alpha.
- * This code was derived from the Solaris/ELF support. Thanks to
- * whatever kind soul wrote that. - Patrick Bridges */
-
-/* This doesn't necessarily work in all cases, e.g. with preloaded
- * dynamic libraries. */
-
-#if defined(NETBSD)
-# include <sys/exec_elf.h>
-#else
-# include <elf.h>
-#endif
-#include <link.h>
-
-# endif
-
-#ifdef __GNUC__
-# pragma weak _DYNAMIC
-#endif
-extern ElfW(Dyn) _DYNAMIC[];
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
- ElfW(Dyn) *dp;
- struct r_debug *r;
- static struct link_map *cachedResult = 0;
-
- if( _DYNAMIC == 0) {
- return(0);
- }
- if( cachedResult == 0 ) {
- int tag;
- for( dp = _DYNAMIC; (tag = dp->d_tag) != 0; dp++ ) {
- if( tag == DT_DEBUG ) {
- struct link_map *lm
- = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
- if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
- break;
- }
- }
- }
- return cachedResult;
-}
-
-
-void GC_register_dynamic_libraries()
-{
- struct link_map *lm;
-
-
-# ifdef HAVE_DL_ITERATE_PHDR
- if (GC_register_dynamic_libraries_dl_iterate_phdr()) {
- return;
- }
-# endif
- lm = GC_FirstDLOpenedLinkMap();
- for (lm = GC_FirstDLOpenedLinkMap();
- lm != (struct link_map *) 0; lm = lm->l_next)
- {
- ElfW(Ehdr) * e;
- ElfW(Phdr) * p;
- unsigned long offset;
- char * start;
- register int i;
-
- e = (ElfW(Ehdr) *) lm->l_addr;
- p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
- offset = ((unsigned long)(lm->l_addr));
- for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
- switch( p->p_type ) {
- case PT_LOAD:
- {
- if( !(p->p_flags & PF_W) ) break;
- start = ((char *)(p->p_vaddr)) + offset;
- GC_add_roots_inner(start, start + p->p_memsz, TRUE);
- }
- break;
- default:
- break;
- }
- }
- }
-}
-
-#endif /* !USE_PROC_FOR_LIBRARIES */
-
-#endif /* LINUX */
-
-#if defined(IRIX5) || (defined(USE_PROC_FOR_LIBRARIES) && !defined(LINUX))
-
-#include <sys/procfs.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <elf.h>
-#include <errno.h>
-#include <signal.h> /* Only for the following test. */
-#ifndef _sigargs
-# define IRIX6
-#endif
-
-extern void * GC_roots_present();
- /* The type is a lie, since the real type doesn't make sense here, */
- /* and we only test for NULL. */
-
-/* We use /proc to track down all parts of the address space that are */
-/* mapped by the process, and throw out regions we know we shouldn't */
-/* worry about. This may also work under other SVR4 variants. */
-void GC_register_dynamic_libraries()
-{
- static int fd = -1;
- char buf[30];
- static prmap_t * addr_map = 0;
- static int current_sz = 0; /* Number of records currently in addr_map */
- static int needed_sz; /* Required size of addr_map */
- register int i;
- register long flags;
- register ptr_t start;
- register ptr_t limit;
- ptr_t heap_start = (ptr_t)HEAP_START;
- ptr_t heap_end = heap_start;
-
-# ifdef SUNOS5DL
-# define MA_PHYS 0
-# endif /* SUNOS5DL */
-
- if (fd < 0) {
- sprintf(buf, "/proc/%d", getpid());
- /* The above generates a lint complaint, since pid_t varies. */
- /* It's unclear how to improve this. */
- fd = open(buf, O_RDONLY);
- if (fd < 0) {
- ABORT("/proc open failed");
- }
- }
- if (ioctl(fd, PIOCNMAP, &needed_sz) < 0) {
- GC_err_printf2("fd = %d, errno = %d\n", fd, errno);
- ABORT("/proc PIOCNMAP ioctl failed");
- }
- if (needed_sz >= current_sz) {
- current_sz = needed_sz * 2 + 1;
- /* Expansion, plus room for 0 record */
- addr_map = (prmap_t *)GC_scratch_alloc((word)
- (current_sz * sizeof(prmap_t)));
- }
- if (ioctl(fd, PIOCMAP, addr_map) < 0) {
- GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n",
- fd, errno, needed_sz, addr_map);
- ABORT("/proc PIOCMAP ioctl failed");
- };
- if (GC_n_heap_sects > 0) {
- heap_end = GC_heap_sects[GC_n_heap_sects-1].hs_start
- + GC_heap_sects[GC_n_heap_sects-1].hs_bytes;
- if (heap_end < GC_scratch_last_end_ptr) heap_end = GC_scratch_last_end_ptr;
- }
- for (i = 0; i < needed_sz; i++) {
- flags = addr_map[i].pr_mflags;
- if ((flags & (MA_BREAK | MA_STACK | MA_PHYS)) != 0) goto irrelevant;
- if ((flags & (MA_READ | MA_WRITE)) != (MA_READ | MA_WRITE))
- goto irrelevant;
- /* The latter test is empirically useless in very old Irix */
- /* versions. Other than the */
- /* main data and stack segments, everything appears to be */
- /* mapped readable, writable, executable, and shared(!!). */
- /* This makes no sense to me. - HB */
- start = (ptr_t)(addr_map[i].pr_vaddr);
- if (GC_roots_present(start)) goto irrelevant;
- if (start < heap_end && start >= heap_start)
- goto irrelevant;
-# ifdef MMAP_STACKS
- if (GC_is_thread_stack(start)) goto irrelevant;
-# endif /* MMAP_STACKS */
-
- limit = start + addr_map[i].pr_size;
- /* The following seemed to be necessary for very old versions */
- /* of Irix, but it has been reported to discard relevant */
- /* segments under Irix 6.5. */
-# ifndef IRIX6
- if (addr_map[i].pr_off == 0 && strncmp(start, ELFMAG, 4) == 0) {
- /* Discard text segments, i.e. 0-offset mappings against */
- /* executable files which appear to have ELF headers. */
- caddr_t arg;
- int obj;
-# define MAP_IRR_SZ 10
- static ptr_t map_irr[MAP_IRR_SZ];
- /* Known irrelevant map entries */
- static int n_irr = 0;
- struct stat buf;
- register int i;
-
- for (i = 0; i < n_irr; i++) {
- if (map_irr[i] == start) goto irrelevant;
- }
- arg = (caddr_t)start;
- obj = ioctl(fd, PIOCOPENM, &arg);
- if (obj >= 0) {
- fstat(obj, &buf);
- close(obj);
- if ((buf.st_mode & 0111) != 0) {
- if (n_irr < MAP_IRR_SZ) {
- map_irr[n_irr++] = start;
- }
- goto irrelevant;
- }
- }
- }
-# endif /* !IRIX6 */
- GC_add_roots_inner(start, limit, TRUE);
- irrelevant: ;
- }
- /* Dont keep cached descriptor, for now. Some kernels don't like us */
- /* to keep a /proc file descriptor around during kill -9. */
- if (close(fd) < 0) ABORT("Couldnt close /proc file");
- fd = -1;
-}
-
-# endif /* USE_PROC || IRIX5 */
-
-# if defined(MSWIN32) || defined(MSWINCE)
-
-# define WIN32_LEAN_AND_MEAN
-# define NOSERVICE
-# include <windows.h>
-# include <stdlib.h>
-
- /* We traverse the entire address space and register all segments */
- /* that could possibly have been written to. */
-
- extern GC_bool GC_is_heap_base (ptr_t p);
-
-# ifdef GC_WIN32_THREADS
- extern void GC_get_next_stack(char *start, char **lo, char **hi);
- void GC_cond_add_roots(char *base, char * limit)
- {
- char * curr_base = base;
- char * next_stack_lo;
- char * next_stack_hi;
-
- if (base == limit) return;
- for(;;) {
- GC_get_next_stack(curr_base, &next_stack_lo, &next_stack_hi);
- if (next_stack_lo >= limit) break;
- GC_add_roots_inner(curr_base, next_stack_lo, TRUE);
- curr_base = next_stack_hi;
- }
- if (curr_base < limit) GC_add_roots_inner(curr_base, limit, TRUE);
- }
-# else
- void GC_cond_add_roots(char *base, char * limit)
- {
- char dummy;
- char * stack_top
- = (char *) ((word)(&dummy) & ~(GC_sysinfo.dwAllocationGranularity-1));
- if (base == limit) return;
- if (limit > stack_top && base < GC_stackbottom) {
- /* Part of the stack; ignore it. */
- return;
- }
- GC_add_roots_inner(base, limit, TRUE);
- }
-# endif
-
-# ifndef MSWINCE
- extern GC_bool GC_no_win32_dlls;
-# endif
-
- void GC_register_dynamic_libraries()
- {
- MEMORY_BASIC_INFORMATION buf;
- DWORD result;
- DWORD protect;
- LPVOID p;
- char * base;
- char * limit, * new_limit;
-
-# ifdef MSWIN32
- if (GC_no_win32_dlls) return;
-# endif
- base = limit = p = GC_sysinfo.lpMinimumApplicationAddress;
-# if defined(MSWINCE) && !defined(_WIN32_WCE_EMULATION)
- /* Only the first 32 MB of address space belongs to the current process */
- while (p < (LPVOID)0x02000000) {
- result = VirtualQuery(p, &buf, sizeof(buf));
- if (result == 0) {
- /* Page is free; advance to the next possible allocation base */
- new_limit = (char *)
- (((DWORD) p + GC_sysinfo.dwAllocationGranularity)
- & ~(GC_sysinfo.dwAllocationGranularity-1));
- } else
-# else
- while (p < GC_sysinfo.lpMaximumApplicationAddress) {
- result = VirtualQuery(p, &buf, sizeof(buf));
-# endif
- {
- if (result != sizeof(buf)) {
- ABORT("Weird VirtualQuery result");
- }
- new_limit = (char *)p + buf.RegionSize;
- protect = buf.Protect;
- if (buf.State == MEM_COMMIT
- && (protect == PAGE_EXECUTE_READWRITE
- || protect == PAGE_READWRITE)
- && !GC_is_heap_base(buf.AllocationBase)) {
- if ((char *)p != limit) {
- GC_cond_add_roots(base, limit);
- base = p;
- }
- limit = new_limit;
- }
- }
- if (p > (LPVOID)new_limit /* overflow */) break;
- p = (LPVOID)new_limit;
- }
- GC_cond_add_roots(base, limit);
- }
-
-#endif /* MSWIN32 || MSWINCE */
-
-#if defined(ALPHA) && defined(OSF1)
-
-#include <loader.h>
-
-void GC_register_dynamic_libraries()
-{
- int status;
- ldr_process_t mypid;
-
- /* module */
- ldr_module_t moduleid = LDR_NULL_MODULE;
- ldr_module_info_t moduleinfo;
- size_t moduleinfosize = sizeof(moduleinfo);
- size_t modulereturnsize;
-
- /* region */
- ldr_region_t region;
- ldr_region_info_t regioninfo;
- size_t regioninfosize = sizeof(regioninfo);
- size_t regionreturnsize;
-
- /* Obtain id of this process */
- mypid = ldr_my_process();
-
- /* For each module */
- while (TRUE) {
-
- /* Get the next (first) module */
- status = ldr_next_module(mypid, &moduleid);
-
- /* Any more modules? */
- if (moduleid == LDR_NULL_MODULE)
- break; /* No more modules */
-
- /* Check status AFTER checking moduleid because */
- /* of a bug in the non-shared ldr_next_module stub */
- if (status != 0 ) {
- GC_printf1("dynamic_load: status = %ld\n", (long)status);
- {
- extern char *sys_errlist[];
- extern int sys_nerr;
- extern int errno;
- if (errno <= sys_nerr) {
- GC_printf1("dynamic_load: %s\n", (long)sys_errlist[errno]);
- } else {
- GC_printf1("dynamic_load: %d\n", (long)errno);
- }
- }
- ABORT("ldr_next_module failed");
- }
-
- /* Get the module information */
- status = ldr_inq_module(mypid, moduleid, &moduleinfo,
- moduleinfosize, &modulereturnsize);
- if (status != 0 )
- ABORT("ldr_inq_module failed");
-
- /* is module for the main program (i.e. nonshared portion)? */
- if (moduleinfo.lmi_flags & LDR_MAIN)
- continue; /* skip the main module */
-
-# ifdef VERBOSE
- GC_printf("---Module---\n");
- GC_printf("Module ID = %16ld\n", moduleinfo.lmi_modid);
- GC_printf("Count of regions = %16d\n", moduleinfo.lmi_nregion);
- GC_printf("flags for module = %16lx\n", moduleinfo.lmi_flags);
- GC_printf("pathname of module = \"%s\"\n", moduleinfo.lmi_name);
-# endif
-
- /* For each region in this module */
- for (region = 0; region < moduleinfo.lmi_nregion; region++) {
-
- /* Get the region information */
- status = ldr_inq_region(mypid, moduleid, region, ®ioninfo,
- regioninfosize, ®ionreturnsize);
- if (status != 0 )
- ABORT("ldr_inq_region failed");
-
- /* only process writable (data) regions */
- if (! (regioninfo.lri_prot & LDR_W))
- continue;
-
-# ifdef VERBOSE
- GC_printf("--- Region ---\n");
- GC_printf("Region number = %16ld\n",
- regioninfo.lri_region_no);
- GC_printf("Protection flags = %016x\n", regioninfo.lri_prot);
- GC_printf("Virtual address = %16p\n", regioninfo.lri_vaddr);
- GC_printf("Mapped address = %16p\n", regioninfo.lri_mapaddr);
- GC_printf("Region size = %16ld\n", regioninfo.lri_size);
- GC_printf("Region name = \"%s\"\n", regioninfo.lri_name);
-# endif
-
- /* register region as a garbage collection root */
- GC_add_roots_inner (
- (char *)regioninfo.lri_mapaddr,
- (char *)regioninfo.lri_mapaddr + regioninfo.lri_size,
- TRUE);
-
- }
- }
-}
-#endif
-
-#if defined(HPUX)
-
-#include <errno.h>
-#include <dl.h>
-
-extern int errno;
-extern char *sys_errlist[];
-extern int sys_nerr;
-
-void GC_register_dynamic_libraries()
-{
- int status;
- int index = 1; /* Ordinal position in shared library search list */
- struct shl_descriptor *shl_desc; /* Shared library info, see dl.h */
-
- /* For each dynamic library loaded */
- while (TRUE) {
-
- /* Get info about next shared library */
- status = shl_get(index, &shl_desc);
-
- /* Check if this is the end of the list or if some error occured */
- if (status != 0) {
-# ifdef GC_HPUX_THREADS
- /* I've seen errno values of 0. The man page is not clear */
- /* as to whether errno should get set on a -1 return. */
- break;
-# else
- if (errno == EINVAL) {
- break; /* Moved past end of shared library list --> finished */
- } else {
- if (errno <= sys_nerr) {
- GC_printf1("dynamic_load: %s\n", (long) sys_errlist[errno]);
- } else {
- GC_printf1("dynamic_load: %d\n", (long) errno);
- }
- ABORT("shl_get failed");
- }
-# endif
- }
-
-# ifdef VERBOSE
- GC_printf0("---Shared library---\n");
- GC_printf1("\tfilename = \"%s\"\n", shl_desc->filename);
- GC_printf1("\tindex = %d\n", index);
- GC_printf1("\thandle = %08x\n",
- (unsigned long) shl_desc->handle);
- GC_printf1("\ttext seg. start = %08x\n", shl_desc->tstart);
- GC_printf1("\ttext seg. end = %08x\n", shl_desc->tend);
- GC_printf1("\tdata seg. start = %08x\n", shl_desc->dstart);
- GC_printf1("\tdata seg. end = %08x\n", shl_desc->dend);
- GC_printf1("\tref. count = %lu\n", shl_desc->ref_count);
-# endif
-
- /* register shared library's data segment as a garbage collection root */
- GC_add_roots_inner((char *) shl_desc->dstart,
- (char *) shl_desc->dend, TRUE);
-
- index++;
- }
-}
-#endif /* HPUX */
-
-#ifdef RS6000
-#pragma alloca
-#include <sys/ldr.h>
-#include <sys/errno.h>
-void GC_register_dynamic_libraries()
-{
- int len;
- char *ldibuf;
- int ldibuflen;
- struct ld_info *ldi;
-
- ldibuf = alloca(ldibuflen = 8192);
-
- while ( (len = loadquery(L_GETINFO,ldibuf,ldibuflen)) < 0) {
- if (errno != ENOMEM) {
- ABORT("loadquery failed");
- }
- ldibuf = alloca(ldibuflen *= 2);
- }
-
- ldi = (struct ld_info *)ldibuf;
- while (ldi) {
- len = ldi->ldinfo_next;
- GC_add_roots_inner(
- ldi->ldinfo_dataorg,
- (unsigned long)ldi->ldinfo_dataorg
- + ldi->ldinfo_datasize,
- TRUE);
- ldi = len ? (struct ld_info *)((char *)ldi + len) : 0;
- }
-}
-#endif /* RS6000 */
-
-
-
-#else /* !DYNAMIC_LOADING */
-
-#ifdef PCR
-
-# include "il/PCR_IL.h"
-# include "th/PCR_ThCtl.h"
-# include "mm/PCR_MM.h"
-
-void GC_register_dynamic_libraries()
-{
- /* Add new static data areas of dynamically loaded modules. */
- {
- PCR_IL_LoadedFile * p = PCR_IL_GetLastLoadedFile();
- PCR_IL_LoadedSegment * q;
-
- /* Skip uncommited files */
- while (p != NIL && !(p -> lf_commitPoint)) {
- /* The loading of this file has not yet been committed */
- /* Hence its description could be inconsistent. */
- /* Furthermore, it hasn't yet been run. Hence its data */
- /* segments can't possibly reference heap allocated */
- /* objects. */
- p = p -> lf_prev;
- }
- for (; p != NIL; p = p -> lf_prev) {
- for (q = p -> lf_ls; q != NIL; q = q -> ls_next) {
- if ((q -> ls_flags & PCR_IL_SegFlags_Traced_MASK)
- == PCR_IL_SegFlags_Traced_on) {
- GC_add_roots_inner
- ((char *)(q -> ls_addr),
- (char *)(q -> ls_addr) + q -> ls_bytes,
- TRUE);
- }
- }
- }
- }
-}
-
-
-#else /* !PCR */
-
-void GC_register_dynamic_libraries(){}
-
-int GC_no_dynamic_loading;
-
-#endif /* !PCR */
-#endif /* !DYNAMIC_LOADING */
projects / msp430-gcc.git / blobdiff