diff options
Diffstat (limited to '')
| -rw-r--r-- | gc/dyn_load.c | 1083 |
1 files changed, 0 insertions, 1083 deletions
diff --git a/gc/dyn_load.c b/gc/dyn_load.c deleted file mode 100644 index 05cedff..0000000 --- a/gc/dyn_load.c +++ /dev/null @@ -1,1083 +0,0 @@ -/* - * 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(DGUX) && \ - !(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(DGUX) || \ - (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(DGUX) || \ - (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 */ |