From cfcd3fe835cf704f86788bf37f32f52297aa91e1 Mon Sep 17 00:00:00 2001
From: tromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 7 Apr 1999 08:01:35 +0000
Subject: [PATCH] Initial revision
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26250 138bc75d-0d04-0410-961f-82ee72b054a4
---
boehm-gc/dyn_load.c | 791 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 791 insertions(+)
create mode 100644 boehm-gc/dyn_load.c
diff --git a/boehm-gc/dyn_load.c b/boehm-gc/dyn_load.c
new file mode 100644
index 000000000000..0785a6e92ced
--- /dev/null
+++ b/boehm-gc/dyn_load.c
@@ -0,0 +1,791 @@
+/*
+ * 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.
+ */
+#ifndef MACOS
+# include <sys/types.h>
+#endif
+#include "gc_priv.h"
+
+/* BTL: avoid circular redefinition of dlopen if SOLARIS_THREADS defined */
+# if defined(SOLARIS_THREADS) && defined(dlopen)
+ /* 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(PCR)
+#if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
+ !defined(MSWIN32) && !(defined(ALPHA) && defined(OSF1)) && \
+ !defined(HP_PA) && (!defined(LINUX) && !defined(__ELF__)) && \
+ !defined(RS6000) && !defined(SCO_ELF)
+ --> 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(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
+
+#ifdef LINT
+ Elf32_Dyn _DYNAMIC;
+#endif
+
+static struct link_map *
+GC_FirstDLOpenedLinkMap()
+{
+ extern Elf32_Dyn _DYNAMIC;
+ Elf32_Dyn *dp;
+ struct r_debug *r;
+ static struct link_map * cachedResult = 0;
+ static Elf32_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 = (Elf32_Dyn*)dlsym(startupSyms, "_DYNAMIC");
+ }
+# else
+ dynStructureAddr = &_DYNAMIC;
+# endif
+
+ if( dynStructureAddr == 0) {
+ return(0);
+ }
+ if( cachedResult == 0 ) {
+ int tag;
+ for( dp = ((Elf32_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 ... */
+
+#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(SOLARIS_THREADS) && defined(THREADS)
+# ifndef SRC_M3
+ --> fix mutual exclusion with dlopen
+# endif /* We assume M3 programs don't call dlopen for now */
+# endif
+
+# ifdef SOLARIS_THREADS
+ /* Redefine dlopen to guarantee mutual exclusion with */
+ /* GC_register_dynamic_libraries. */
+ /* assumes that dlopen doesn't need to call GC_malloc */
+ /* and friends. */
+# include <thread.h>
+# include <synch.h>
+
+void * GC_dlopen(const char *path, int mode)
+{
+ void * result;
+
+# ifndef USE_PROC_FOR_LIBRARIES
+ mutex_lock(&GC_allocate_ml);
+# endif
+ result = dlopen(path, mode);
+# ifndef USE_PROC_FOR_LIBRARIES
+ mutex_unlock(&GC_allocate_ml);
+# endif
+ return(result);
+}
+# endif /* SOLARIS_THREADS */
+
+/* BTL: added to fix circular dlopen definition if SOLARIS_THREADS defined */
+# if defined(GC_must_restore_redefined_dlopen)
+# define dlopen GC_dlopen
+# 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
+ Elf32_Ehdr * e;
+ Elf32_Phdr * p;
+ unsigned long offset;
+ char * start;
+ register int i;
+
+ e = (Elf32_Ehdr *) lm->l_addr;
+ p = ((Elf32_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)
+
+/* 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 */
+
+#include <elf.h>
+#include <link.h>
+
+/* Newer versions of Linux/Alpha and Linux/x86 define this macro. We
+ * define it for those older versions 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
+
+static struct link_map *
+GC_FirstDLOpenedLinkMap()
+{
+ extern ElfW(Dyn) _DYNAMIC[];
+ 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 = 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
+
+#if defined(IRIX5) || defined(USE_PROC_FOR_LIBRARIES)
+
+#include <sys/procfs.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <elf.h>
+#include <errno.h>
+
+extern void * GC_roots_present();
+
+extern ptr_t GC_scratch_last_end_ptr; /* End of GC_scratch_alloc arena */
+
+/* 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());
+ 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(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. 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;
+ 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;
+ }
+ }
+ }
+ 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 */
+
+# ifdef MSWIN32
+
+# 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. */
+ DWORD GC_allocation_granularity;
+
+ extern GC_bool GC_is_heap_base (ptr_t p);
+
+# ifdef WIN32_THREADS
+ extern void GC_get_next_stack(char *start, char **lo, char **hi);
+# endif
+
+ void GC_cond_add_roots(char *base, char * limit)
+ {
+ char dummy;
+ char * stack_top
+ = (char *) ((word)(&dummy) & ~(GC_allocation_granularity-1));
+ if (base == limit) return;
+# ifdef WIN32_THREADS
+ {
+ char * curr_base = base;
+ char * next_stack_lo;
+ char * next_stack_hi;
+
+ 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
+ if (limit > stack_top && base < GC_stackbottom) {
+ /* Part of the stack; ignore it. */
+ return;
+ }
+ GC_add_roots_inner(base, limit, TRUE);
+# endif
+ }
+
+ extern GC_bool GC_win32s;
+
+ void GC_register_dynamic_libraries()
+ {
+ MEMORY_BASIC_INFORMATION buf;
+ SYSTEM_INFO sysinfo;
+ DWORD result;
+ DWORD protect;
+ LPVOID p;
+ char * base;
+ char * limit, * new_limit;
+
+ if (GC_win32s) return;
+ GetSystemInfo(&sysinfo);
+ base = limit = p = sysinfo.lpMinimumApplicationAddress;
+ GC_allocation_granularity = sysinfo.dwAllocationGranularity;
+ while (p < sysinfo.lpMaximumApplicationAddress) {
+ result = VirtualQuery(p, &buf, sizeof(buf));
+ 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) {
+ limit = new_limit;
+ } else {
+ 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 */
+
+#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(HP_PA)
+
+#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) {
+ 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");
+ }
+ }
+
+# 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 /* HP_PA */
+
+#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 */
--
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