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721 |
jeremybenn |
/*
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* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1997 by Silicon Graphics. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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* Original author: Bill Janssen
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* Heavily modified by Hans Boehm and others
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*/
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/*
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* This is incredibly OS specific code for tracking down data sections in
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* dynamic libraries. There appears to be no way of doing this quickly
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* without groveling through undocumented data structures. We would argue
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* that this is a bug in the design of the dlopen interface. THIS CODE
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* MAY BREAK IN FUTURE OS RELEASES. If this matters to you, don't hesitate
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* to let your vendor know ...
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*
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* None of this is safe with dlclose and incremental collection.
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* But then not much of anything is safe in the presence of dlclose.
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*/
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#if (defined(__linux__) || defined(__GLIBC__)) && !defined(_GNU_SOURCE)
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/* Can't test LINUX, since this must be define before other includes */
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# define _GNU_SOURCE
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#endif
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#if !defined(MACOS) && !defined(_WIN32_WCE)
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# include <sys/types.h>
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#endif
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#include "private/gc_priv.h"
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/* BTL: avoid circular redefinition of dlopen if GC_SOLARIS_THREADS defined */
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# if (defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS)) \
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&& defined(dlopen) && !defined(GC_USE_LD_WRAP)
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/* To support threads in Solaris, gc.h interposes on dlopen by */
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/* defining "dlopen" to be "GC_dlopen", which is implemented below. */
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/* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */
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/* real system dlopen() in their implementation. We first remove */
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/* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
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# undef dlopen
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# define GC_must_restore_redefined_dlopen
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# else
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# undef GC_must_restore_redefined_dlopen
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# endif
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#if (defined(DYNAMIC_LOADING) \
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|| defined(MSWIN32) \
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|| defined(MSWINCE) \
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|| defined(CYGWIN32)) \
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&& !defined(PCR)
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#if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
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!defined(MSWIN32) && !defined(MSWINCE) && !defined(CYGWIN32) && \
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!(defined(ALPHA) && defined(OSF1)) && \
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!defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
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!defined(RS6000) && !defined(SCO_ELF) && !defined(DGUX) && \
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!(defined(FREEBSD) && defined(__ELF__)) && \
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!(defined(NETBSD) && defined(__ELF__)) && !defined(HURD) && \
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!defined(DARWIN)
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--> We only know how to find data segments of dynamic libraries for the
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--> above. Additional SVR4 variants might not be too
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--> hard to add.
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#endif
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#include <stdio.h>
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#ifdef SUNOS5DL
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# include <sys/elf.h>
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# include <dlfcn.h>
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# include <link.h>
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#endif
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#ifdef SUNOS4
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# include <dlfcn.h>
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# include <link.h>
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# include <a.out.h>
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/* struct link_map field overrides */
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# define l_next lm_next
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# define l_addr lm_addr
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# define l_name lm_name
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#endif
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#ifdef IRIX5
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# include <elf.h>
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# if _MIPS_SIM == _MIPS_SIM_ABI32 /* O32 ABI */
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/* Don't include <obj_list.h> here. */
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# include <obj.h>
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# else /* N32 or N64 ABIs */
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# include <objlist.h>
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# endif
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#endif
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#if defined(NETBSD)
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# include <machine/elf_machdep.h>
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# define ELFSIZE ARCH_ELFSIZE
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#endif
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#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
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(defined(FREEBSD) && defined(__ELF__)) || defined(DGUX) || \
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(defined(NETBSD) && defined(__ELF__)) || defined(HURD)
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# include <stddef.h>
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# include <elf.h>
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# include <link.h>
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#endif
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/* Newer versions of GNU/Linux define this macro. We
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* define it similarly for any ELF systems that don't. */
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# ifndef ElfW
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# if defined(FREEBSD)
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# if __ELF_WORD_SIZE == 32
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# define ElfW(type) Elf32_##type
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# else
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# define ElfW(type) Elf64_##type
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# endif
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# else
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# ifdef NETBSD
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# if ELFSIZE == 32
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# define ElfW(type) Elf32_##type
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# else
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# define ElfW(type) Elf64_##type
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# endif
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# else
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# if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32
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# define ElfW(type) Elf32_##type
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# else
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# define ElfW(type) Elf64_##type
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# endif
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# endif
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# endif
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# endif
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/* An user-supplied routine that is called to determine if a DSO must
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be scanned by the gc. */
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static int (*GC_has_static_roots)(const char *, void *, size_t);
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/* Register the routine. */
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void
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GC_register_has_static_roots_callback
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(int (*callback)(const char *, void *, size_t))
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{
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GC_has_static_roots = callback;
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}
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#if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
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#ifdef LINT
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Elf32_Dyn _DYNAMIC;
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#endif
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#define obj_offset(lm) ((unsigned long)(lm->l_addr))
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static struct link_map *
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GC_FirstDLOpenedLinkMap()
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{
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extern ElfW(Dyn) _DYNAMIC;
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ElfW(Dyn) *dp;
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struct r_debug *r;
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static struct link_map * cachedResult = 0;
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static ElfW(Dyn) *dynStructureAddr = 0;
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/* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */
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# ifdef SUNOS53_SHARED_LIB
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/* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set */
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/* up properly in dynamically linked .so's. This means we have */
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/* to use its value in the set of original object files loaded */
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/* at program startup. */
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if( dynStructureAddr == 0 ) {
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void* startupSyms = dlopen(0, RTLD_LAZY);
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dynStructureAddr = (ElfW(Dyn)*)dlsym(startupSyms, "_DYNAMIC");
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}
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# else
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dynStructureAddr = &_DYNAMIC;
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# endif
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if( dynStructureAddr == 0) {
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return(0);
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}
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if( cachedResult == 0 ) {
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int tag;
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for( dp = ((ElfW(Dyn) *)(&_DYNAMIC)); (tag = dp->d_tag) != 0; dp++ ) {
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if( tag == DT_DEBUG ) {
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struct link_map *lm
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= ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
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if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
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break;
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}
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}
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}
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return cachedResult;
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}
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#endif /* SUNOS5DL ... */
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/* BTL: added to fix circular dlopen definition if GC_SOLARIS_THREADS defined */
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# if defined(GC_must_restore_redefined_dlopen)
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# define dlopen GC_dlopen
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# endif
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#if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES)
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#ifdef LINT
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struct link_dynamic _DYNAMIC;
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#endif
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#define obj_offset(lm) ((unsigned long)(lm->l_addr))
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static struct link_map *
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GC_FirstDLOpenedLinkMap()
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{
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extern struct link_dynamic _DYNAMIC;
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if( &_DYNAMIC == 0) {
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return(0);
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}
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return(_DYNAMIC.ld_un.ld_1->ld_loaded);
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}
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/* Return the address of the ld.so allocated common symbol */
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/* with the least address, or 0 if none. */
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static ptr_t GC_first_common()
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{
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ptr_t result = 0;
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extern struct link_dynamic _DYNAMIC;
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struct rtc_symb * curr_symbol;
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if( &_DYNAMIC == 0) {
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return(0);
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}
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curr_symbol = _DYNAMIC.ldd -> ldd_cp;
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for (; curr_symbol != 0; curr_symbol = curr_symbol -> rtc_next) {
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if (result == 0
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|| (ptr_t)(curr_symbol -> rtc_sp -> n_value) < result) {
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result = (ptr_t)(curr_symbol -> rtc_sp -> n_value);
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}
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}
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return(result);
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}
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#endif /* SUNOS4 ... */
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#if defined(IRIX5) && !defined(USE_PROC_FOR_LIBRARIES)
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/* Provide struct link map. */
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# if _MIPS_SIM == _MIPS_SIM_ABI32 /* O32 ABI */
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/* Provide our own version of struct obj_list in <obj_list.h> with
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correctly typed data member. */
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struct obj_list {
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struct obj *data;
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struct obj_list *next;
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struct obj_list *prev;
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} objList;
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struct link_map {
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objList l_ol;
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};
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257 |
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258 |
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extern objList *__rld_obj_head;
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260 |
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/* Map field names */
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# define l_next l_ol.next
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# define l_addr l_ol.data->o_pelfhdr
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263 |
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264 |
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# define obj_offset(lm) \
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((unsigned long)(lm->l_ol.o_praw - (char *)lm->l_ol.o_base_address))
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# else /* N32 or N64 ABIs */
|
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struct link_map {
|
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ElfW(Obj_Info) l_oi;
|
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};
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270 |
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271 |
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extern ElfW(Obj_Info) *__rld_obj_head;
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272 |
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273 |
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/* Map field names */
|
274 |
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# define l_next l_oi.oi_next
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# define l_addr l_oi.oi_ehdr
|
276 |
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277 |
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/* See gdb/solib-irix.c (fetch_lm_info). */
|
278 |
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# define obj_offset(lm) \
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279 |
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((unsigned long)(lm->l_oi.oi_ehdr - lm->l_oi.oi_orig_ehdr))
|
280 |
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# endif
|
281 |
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|
282 |
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static struct link_map *
|
283 |
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GC_FirstDLOpenedLinkMap()
|
284 |
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{
|
285 |
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return (struct link_map *)__rld_obj_head;
|
286 |
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}
|
287 |
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|
288 |
|
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#endif /* IRIX5 ... */
|
289 |
|
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|
290 |
|
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# if defined(SUNOS4) || defined(SUNOS5DL) || defined(IRIX5)
|
291 |
|
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/* Add dynamic library data sections to the root set. */
|
292 |
|
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# if !defined(PCR) \
|
293 |
|
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&& !defined(GC_SOLARIS_PTHREADS) && !defined(GC_IRIX_THREADS) \
|
294 |
|
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&& defined(THREADS)
|
295 |
|
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# ifndef SRC_M3
|
296 |
|
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--> fix mutual exclusion with dlopen
|
297 |
|
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# endif /* We assume M3 programs don't call dlopen for now */
|
298 |
|
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# endif
|
299 |
|
|
|
300 |
|
|
# ifndef USE_PROC_FOR_LIBRARIES
|
301 |
|
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void GC_register_dynamic_libraries()
|
302 |
|
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{
|
303 |
|
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struct link_map *lm = GC_FirstDLOpenedLinkMap();
|
304 |
|
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|
305 |
|
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|
306 |
|
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for (lm = GC_FirstDLOpenedLinkMap();
|
307 |
|
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lm != (struct link_map *) 0; lm = (struct link_map *) lm->l_next)
|
308 |
|
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{
|
309 |
|
|
# ifdef SUNOS4
|
310 |
|
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struct exec *e;
|
311 |
|
|
|
312 |
|
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e = (struct exec *) lm->lm_addr;
|
313 |
|
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GC_add_roots_inner(
|
314 |
|
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((char *) (N_DATOFF(*e) + lm->lm_addr)),
|
315 |
|
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((char *) (N_BSSADDR(*e) + e->a_bss + lm->lm_addr)),
|
316 |
|
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TRUE);
|
317 |
|
|
# endif
|
318 |
|
|
# if defined(SUNOS5DL) || defined(IRIX5)
|
319 |
|
|
ElfW(Ehdr) * e;
|
320 |
|
|
ElfW(Phdr) * p;
|
321 |
|
|
unsigned long offset;
|
322 |
|
|
char * start;
|
323 |
|
|
register int i;
|
324 |
|
|
|
325 |
|
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e = (ElfW(Ehdr) *) lm->l_addr;
|
326 |
|
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p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
|
327 |
|
|
offset = obj_offset(lm);
|
328 |
|
|
for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
|
329 |
|
|
switch( p->p_type ) {
|
330 |
|
|
case PT_LOAD:
|
331 |
|
|
{
|
332 |
|
|
if( !(p->p_flags & PF_W) ) break;
|
333 |
|
|
start = ((char *)(p->p_vaddr)) + offset;
|
334 |
|
|
GC_add_roots_inner(
|
335 |
|
|
start,
|
336 |
|
|
start + p->p_memsz,
|
337 |
|
|
TRUE
|
338 |
|
|
);
|
339 |
|
|
}
|
340 |
|
|
break;
|
341 |
|
|
default:
|
342 |
|
|
break;
|
343 |
|
|
}
|
344 |
|
|
}
|
345 |
|
|
# endif
|
346 |
|
|
}
|
347 |
|
|
# ifdef SUNOS4
|
348 |
|
|
{
|
349 |
|
|
static ptr_t common_start = 0;
|
350 |
|
|
ptr_t common_end;
|
351 |
|
|
extern ptr_t GC_find_limit();
|
352 |
|
|
|
353 |
|
|
if (common_start == 0) common_start = GC_first_common();
|
354 |
|
|
if (common_start != 0) {
|
355 |
|
|
common_end = GC_find_limit(common_start, TRUE);
|
356 |
|
|
GC_add_roots_inner((char *)common_start, (char *)common_end, TRUE);
|
357 |
|
|
}
|
358 |
|
|
}
|
359 |
|
|
# endif
|
360 |
|
|
}
|
361 |
|
|
|
362 |
|
|
# endif /* !USE_PROC ... */
|
363 |
|
|
# endif /* SUNOS */
|
364 |
|
|
|
365 |
|
|
#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
|
366 |
|
|
(defined(FREEBSD) && defined(__ELF__)) || defined(DGUX) || \
|
367 |
|
|
(defined(NETBSD) && defined(__ELF__)) || defined(HURD)
|
368 |
|
|
|
369 |
|
|
|
370 |
|
|
#ifdef USE_PROC_FOR_LIBRARIES
|
371 |
|
|
|
372 |
|
|
#include <string.h>
|
373 |
|
|
|
374 |
|
|
#include <sys/stat.h>
|
375 |
|
|
#include <fcntl.h>
|
376 |
|
|
#include <unistd.h>
|
377 |
|
|
|
378 |
|
|
#define MAPS_BUF_SIZE (32*1024)
|
379 |
|
|
|
380 |
|
|
extern ssize_t GC_repeat_read(int fd, char *buf, size_t count);
|
381 |
|
|
/* Repeatedly read until buffer is filled, or EOF is encountered */
|
382 |
|
|
/* Defined in os_dep.c. */
|
383 |
|
|
|
384 |
|
|
char *GC_parse_map_entry(char *buf_ptr, word *start, word *end,
|
385 |
|
|
char *prot_buf, unsigned int *maj_dev);
|
386 |
|
|
word GC_apply_to_maps(word (*fn)(char *));
|
387 |
|
|
/* From os_dep.c */
|
388 |
|
|
|
389 |
|
|
word GC_register_map_entries(char *maps)
|
390 |
|
|
{
|
391 |
|
|
char prot_buf[5];
|
392 |
|
|
char *buf_ptr = maps;
|
393 |
|
|
int count;
|
394 |
|
|
word start, end;
|
395 |
|
|
unsigned int maj_dev;
|
396 |
|
|
word least_ha, greatest_ha;
|
397 |
|
|
unsigned i;
|
398 |
|
|
word datastart = (word)(DATASTART);
|
399 |
|
|
|
400 |
|
|
/* Compute heap bounds. FIXME: Should be done by add_to_heap? */
|
401 |
|
|
least_ha = (word)(-1);
|
402 |
|
|
greatest_ha = 0;
|
403 |
|
|
for (i = 0; i < GC_n_heap_sects; ++i) {
|
404 |
|
|
word sect_start = (word)GC_heap_sects[i].hs_start;
|
405 |
|
|
word sect_end = sect_start + GC_heap_sects[i].hs_bytes;
|
406 |
|
|
if (sect_start < least_ha) least_ha = sect_start;
|
407 |
|
|
if (sect_end > greatest_ha) greatest_ha = sect_end;
|
408 |
|
|
}
|
409 |
|
|
if (greatest_ha < (word)GC_scratch_last_end_ptr)
|
410 |
|
|
greatest_ha = (word)GC_scratch_last_end_ptr;
|
411 |
|
|
|
412 |
|
|
for (;;) {
|
413 |
|
|
buf_ptr = GC_parse_map_entry(buf_ptr, &start, &end, prot_buf, &maj_dev);
|
414 |
|
|
if (buf_ptr == NULL) return 1;
|
415 |
|
|
if (prot_buf[1] == 'w') {
|
416 |
|
|
/* This is a writable mapping. Add it to */
|
417 |
|
|
/* the root set unless it is already otherwise */
|
418 |
|
|
/* accounted for. */
|
419 |
|
|
if (start <= (word)GC_stackbottom && end >= (word)GC_stackbottom) {
|
420 |
|
|
/* Stack mapping; discard */
|
421 |
|
|
continue;
|
422 |
|
|
}
|
423 |
|
|
# ifdef THREADS
|
424 |
|
|
if (GC_segment_is_thread_stack(start, end)) continue;
|
425 |
|
|
# endif
|
426 |
|
|
/* We no longer exclude the main data segment. */
|
427 |
|
|
if (start < least_ha && end > least_ha) {
|
428 |
|
|
end = least_ha;
|
429 |
|
|
}
|
430 |
|
|
if (start < greatest_ha && end > greatest_ha) {
|
431 |
|
|
start = greatest_ha;
|
432 |
|
|
}
|
433 |
|
|
if (start >= least_ha && end <= greatest_ha) continue;
|
434 |
|
|
GC_add_roots_inner((char *)start, (char *)end, TRUE);
|
435 |
|
|
}
|
436 |
|
|
}
|
437 |
|
|
return 1;
|
438 |
|
|
}
|
439 |
|
|
|
440 |
|
|
void GC_register_dynamic_libraries()
|
441 |
|
|
{
|
442 |
|
|
if (!GC_apply_to_maps(GC_register_map_entries))
|
443 |
|
|
ABORT("Failed to read /proc for library registration.");
|
444 |
|
|
}
|
445 |
|
|
|
446 |
|
|
/* We now take care of the main data segment ourselves: */
|
447 |
|
|
GC_bool GC_register_main_static_data()
|
448 |
|
|
{
|
449 |
|
|
return FALSE;
|
450 |
|
|
}
|
451 |
|
|
|
452 |
|
|
# define HAVE_REGISTER_MAIN_STATIC_DATA
|
453 |
|
|
|
454 |
|
|
#endif /* USE_PROC_FOR_LIBRARIES */
|
455 |
|
|
|
456 |
|
|
#if !defined(USE_PROC_FOR_LIBRARIES)
|
457 |
|
|
/* The following is the preferred way to walk dynamic libraries */
|
458 |
|
|
/* For glibc 2.2.4+. Unfortunately, it doesn't work for older */
|
459 |
|
|
/* versions. Thanks to Jakub Jelinek for most of the code. */
|
460 |
|
|
|
461 |
|
|
# if (defined(LINUX) || defined (__GLIBC__)) /* Are others OK here, too? */ \
|
462 |
|
|
&& (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
|
463 |
|
|
|| (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
|
464 |
|
|
|
465 |
|
|
/* We have the header files for a glibc that includes dl_iterate_phdr. */
|
466 |
|
|
/* It may still not be available in the library on the target system. */
|
467 |
|
|
/* Thus we also treat it as a weak symbol. */
|
468 |
|
|
#define HAVE_DL_ITERATE_PHDR
|
469 |
|
|
#pragma weak dl_iterate_phdr
|
470 |
|
|
#endif
|
471 |
|
|
|
472 |
|
|
# if (defined(FREEBSD) && __FreeBSD__ >= 7)
|
473 |
|
|
/* On the FreeBSD system, any target system at major version 7 shall */
|
474 |
|
|
/* have dl_iterate_phdr; therefore, we need not make it weak as above. */
|
475 |
|
|
#define HAVE_DL_ITERATE_PHDR
|
476 |
|
|
#endif
|
477 |
|
|
|
478 |
|
|
#if defined(HAVE_DL_ITERATE_PHDR)
|
479 |
|
|
|
480 |
|
|
static int GC_register_dynlib_callback(info, size, ptr)
|
481 |
|
|
struct dl_phdr_info * info;
|
482 |
|
|
size_t size;
|
483 |
|
|
void * ptr;
|
484 |
|
|
{
|
485 |
|
|
const ElfW(Phdr) * p;
|
486 |
|
|
char * start;
|
487 |
|
|
register int i;
|
488 |
|
|
|
489 |
|
|
/* Make sure struct dl_phdr_info is at least as big as we need. */
|
490 |
|
|
if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
|
491 |
|
|
+ sizeof (info->dlpi_phnum))
|
492 |
|
|
return -1;
|
493 |
|
|
|
494 |
|
|
p = info->dlpi_phdr;
|
495 |
|
|
for( i = 0; i < (int)(info->dlpi_phnum); ((i++),(p++)) ) {
|
496 |
|
|
switch( p->p_type ) {
|
497 |
|
|
case PT_LOAD:
|
498 |
|
|
{
|
499 |
|
|
if( !(p->p_flags & PF_W) ) break;
|
500 |
|
|
start = ((char *)(p->p_vaddr)) + info->dlpi_addr;
|
501 |
|
|
|
502 |
|
|
if (GC_has_static_roots
|
503 |
|
|
&& !GC_has_static_roots(info->dlpi_name, start, p->p_memsz))
|
504 |
|
|
break;
|
505 |
|
|
|
506 |
|
|
GC_add_roots_inner(start, start + p->p_memsz, TRUE);
|
507 |
|
|
}
|
508 |
|
|
break;
|
509 |
|
|
default:
|
510 |
|
|
break;
|
511 |
|
|
}
|
512 |
|
|
}
|
513 |
|
|
|
514 |
|
|
* (int *)ptr = 1; /* Signal that we were called */
|
515 |
|
|
return 0;
|
516 |
|
|
}
|
517 |
|
|
|
518 |
|
|
/* Return TRUE if we succeed, FALSE if dl_iterate_phdr wasn't there. */
|
519 |
|
|
|
520 |
|
|
GC_bool GC_register_dynamic_libraries_dl_iterate_phdr()
|
521 |
|
|
{
|
522 |
|
|
if (dl_iterate_phdr) {
|
523 |
|
|
int did_something = 0;
|
524 |
|
|
dl_iterate_phdr(GC_register_dynlib_callback, &did_something);
|
525 |
|
|
if (!did_something) {
|
526 |
|
|
/* dl_iterate_phdr may forget the static data segment in */
|
527 |
|
|
/* statically linked executables. */
|
528 |
|
|
GC_add_roots_inner(DATASTART, (char *)(DATAEND), TRUE);
|
529 |
|
|
# if defined(DATASTART2)
|
530 |
|
|
GC_add_roots_inner(DATASTART2, (char *)(DATAEND2), TRUE);
|
531 |
|
|
# endif
|
532 |
|
|
}
|
533 |
|
|
|
534 |
|
|
return TRUE;
|
535 |
|
|
} else {
|
536 |
|
|
return FALSE;
|
537 |
|
|
}
|
538 |
|
|
}
|
539 |
|
|
|
540 |
|
|
/* Do we need to separately register the main static data segment? */
|
541 |
|
|
GC_bool GC_register_main_static_data()
|
542 |
|
|
{
|
543 |
|
|
return (dl_iterate_phdr == 0);
|
544 |
|
|
}
|
545 |
|
|
|
546 |
|
|
#define HAVE_REGISTER_MAIN_STATIC_DATA
|
547 |
|
|
|
548 |
|
|
# else /* !LINUX || version(glibc) < 2.2.4 */
|
549 |
|
|
|
550 |
|
|
/* Dynamic loading code for Linux running ELF. Somewhat tested on
|
551 |
|
|
* Linux/x86, untested but hopefully should work on Linux/Alpha.
|
552 |
|
|
* This code was derived from the Solaris/ELF support. Thanks to
|
553 |
|
|
* whatever kind soul wrote that. - Patrick Bridges */
|
554 |
|
|
|
555 |
|
|
/* This doesn't necessarily work in all cases, e.g. with preloaded
|
556 |
|
|
* dynamic libraries. */
|
557 |
|
|
|
558 |
|
|
#if defined(NETBSD)
|
559 |
|
|
# include <sys/exec_elf.h>
|
560 |
|
|
/* for compatibility with 1.4.x */
|
561 |
|
|
# ifndef DT_DEBUG
|
562 |
|
|
# define DT_DEBUG 21
|
563 |
|
|
# endif
|
564 |
|
|
# ifndef PT_LOAD
|
565 |
|
|
# define PT_LOAD 1
|
566 |
|
|
# endif
|
567 |
|
|
# ifndef PF_W
|
568 |
|
|
# define PF_W 2
|
569 |
|
|
# endif
|
570 |
|
|
#else
|
571 |
|
|
# include <elf.h>
|
572 |
|
|
#endif
|
573 |
|
|
#include <link.h>
|
574 |
|
|
|
575 |
|
|
# endif
|
576 |
|
|
|
577 |
|
|
#ifdef __GNUC__
|
578 |
|
|
# pragma weak _DYNAMIC
|
579 |
|
|
#endif
|
580 |
|
|
extern ElfW(Dyn) _DYNAMIC[];
|
581 |
|
|
|
582 |
|
|
static struct link_map *
|
583 |
|
|
GC_FirstDLOpenedLinkMap()
|
584 |
|
|
{
|
585 |
|
|
ElfW(Dyn) *dp;
|
586 |
|
|
static struct link_map *cachedResult = 0;
|
587 |
|
|
|
588 |
|
|
if( _DYNAMIC == 0) {
|
589 |
|
|
return(0);
|
590 |
|
|
}
|
591 |
|
|
if( cachedResult == 0 ) {
|
592 |
|
|
int tag;
|
593 |
|
|
for( dp = _DYNAMIC; (tag = dp->d_tag) != 0; dp++ ) {
|
594 |
|
|
/* FIXME: The DT_DEBUG header is not mandated by the */
|
595 |
|
|
/* ELF spec. This code appears to be dependent on */
|
596 |
|
|
/* idiosynchracies of older GNU tool chains. If this code */
|
597 |
|
|
/* fails for you, the real problem is probably that it is */
|
598 |
|
|
/* being used at all. You should be getting the */
|
599 |
|
|
/* dl_iterate_phdr version. */
|
600 |
|
|
if( tag == DT_DEBUG ) {
|
601 |
|
|
struct link_map *lm
|
602 |
|
|
= ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
|
603 |
|
|
if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
|
604 |
|
|
break;
|
605 |
|
|
}
|
606 |
|
|
}
|
607 |
|
|
}
|
608 |
|
|
return cachedResult;
|
609 |
|
|
}
|
610 |
|
|
|
611 |
|
|
|
612 |
|
|
void GC_register_dynamic_libraries()
|
613 |
|
|
{
|
614 |
|
|
struct link_map *lm;
|
615 |
|
|
|
616 |
|
|
|
617 |
|
|
# ifdef HAVE_DL_ITERATE_PHDR
|
618 |
|
|
if (GC_register_dynamic_libraries_dl_iterate_phdr()) {
|
619 |
|
|
return;
|
620 |
|
|
}
|
621 |
|
|
# endif
|
622 |
|
|
lm = GC_FirstDLOpenedLinkMap();
|
623 |
|
|
for (lm = GC_FirstDLOpenedLinkMap();
|
624 |
|
|
lm != (struct link_map *) 0; lm = lm->l_next)
|
625 |
|
|
{
|
626 |
|
|
ElfW(Ehdr) * e;
|
627 |
|
|
ElfW(Phdr) * p;
|
628 |
|
|
unsigned long offset;
|
629 |
|
|
char * start;
|
630 |
|
|
register int i;
|
631 |
|
|
|
632 |
|
|
e = (ElfW(Ehdr) *) lm->l_addr;
|
633 |
|
|
p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
|
634 |
|
|
offset = ((unsigned long)(lm->l_addr));
|
635 |
|
|
for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
|
636 |
|
|
switch( p->p_type ) {
|
637 |
|
|
case PT_LOAD:
|
638 |
|
|
{
|
639 |
|
|
if( !(p->p_flags & PF_W) ) break;
|
640 |
|
|
start = ((char *)(p->p_vaddr)) + offset;
|
641 |
|
|
GC_add_roots_inner(start, start + p->p_memsz, TRUE);
|
642 |
|
|
}
|
643 |
|
|
break;
|
644 |
|
|
default:
|
645 |
|
|
break;
|
646 |
|
|
}
|
647 |
|
|
}
|
648 |
|
|
}
|
649 |
|
|
}
|
650 |
|
|
|
651 |
|
|
#endif /* !USE_PROC_FOR_LIBRARIES */
|
652 |
|
|
|
653 |
|
|
#endif /* LINUX */
|
654 |
|
|
|
655 |
|
|
#if defined(USE_PROC_FOR_LIBRARIES) && !defined(LINUX)
|
656 |
|
|
|
657 |
|
|
#include <sys/procfs.h>
|
658 |
|
|
#include <sys/stat.h>
|
659 |
|
|
#include <fcntl.h>
|
660 |
|
|
#include <elf.h>
|
661 |
|
|
#include <errno.h>
|
662 |
|
|
#include <signal.h> /* Only for the following test. */
|
663 |
|
|
#ifndef _sigargs
|
664 |
|
|
# define IRIX6
|
665 |
|
|
#endif
|
666 |
|
|
|
667 |
|
|
extern void * GC_roots_present();
|
668 |
|
|
/* The type is a lie, since the real type doesn't make sense here, */
|
669 |
|
|
/* and we only test for NULL. */
|
670 |
|
|
|
671 |
|
|
|
672 |
|
|
/* We use /proc to track down all parts of the address space that are */
|
673 |
|
|
/* mapped by the process, and throw out regions we know we shouldn't */
|
674 |
|
|
/* worry about. This may also work under other SVR4 variants. */
|
675 |
|
|
void GC_register_dynamic_libraries()
|
676 |
|
|
{
|
677 |
|
|
static int fd = -1;
|
678 |
|
|
char buf[30];
|
679 |
|
|
static prmap_t * addr_map = 0;
|
680 |
|
|
static int current_sz = 0; /* Number of records currently in addr_map */
|
681 |
|
|
static int needed_sz; /* Required size of addr_map */
|
682 |
|
|
register int i;
|
683 |
|
|
register long flags;
|
684 |
|
|
register ptr_t start;
|
685 |
|
|
register ptr_t limit;
|
686 |
|
|
ptr_t heap_start = (ptr_t)HEAP_START;
|
687 |
|
|
ptr_t heap_end = heap_start;
|
688 |
|
|
|
689 |
|
|
# ifdef SUNOS5DL
|
690 |
|
|
# define MA_PHYS 0
|
691 |
|
|
# endif /* SUNOS5DL */
|
692 |
|
|
|
693 |
|
|
if (fd < 0) {
|
694 |
|
|
sprintf(buf, "/proc/%d", getpid());
|
695 |
|
|
/* The above generates a lint complaint, since pid_t varies. */
|
696 |
|
|
/* It's unclear how to improve this. */
|
697 |
|
|
fd = open(buf, O_RDONLY);
|
698 |
|
|
if (fd < 0) {
|
699 |
|
|
ABORT("/proc open failed");
|
700 |
|
|
}
|
701 |
|
|
}
|
702 |
|
|
if (ioctl(fd, PIOCNMAP, &needed_sz) < 0) {
|
703 |
|
|
GC_err_printf2("fd = %d, errno = %d\n", fd, errno);
|
704 |
|
|
ABORT("/proc PIOCNMAP ioctl failed");
|
705 |
|
|
}
|
706 |
|
|
if (needed_sz >= current_sz) {
|
707 |
|
|
current_sz = needed_sz * 2 + 1;
|
708 |
|
|
/* Expansion, plus room for 0 record */
|
709 |
|
|
addr_map = (prmap_t *)GC_scratch_alloc((word)
|
710 |
|
|
(current_sz * sizeof(prmap_t)));
|
711 |
|
|
}
|
712 |
|
|
if (ioctl(fd, PIOCMAP, addr_map) < 0) {
|
713 |
|
|
GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n",
|
714 |
|
|
fd, errno, needed_sz, addr_map);
|
715 |
|
|
ABORT("/proc PIOCMAP ioctl failed");
|
716 |
|
|
};
|
717 |
|
|
if (GC_n_heap_sects > 0) {
|
718 |
|
|
heap_end = GC_heap_sects[GC_n_heap_sects-1].hs_start
|
719 |
|
|
+ GC_heap_sects[GC_n_heap_sects-1].hs_bytes;
|
720 |
|
|
if (heap_end < GC_scratch_last_end_ptr) heap_end = GC_scratch_last_end_ptr;
|
721 |
|
|
}
|
722 |
|
|
for (i = 0; i < needed_sz; i++) {
|
723 |
|
|
flags = addr_map[i].pr_mflags;
|
724 |
|
|
if ((flags & (MA_BREAK | MA_STACK | MA_PHYS
|
725 |
|
|
| MA_FETCHOP | MA_NOTCACHED)) != 0) goto irrelevant;
|
726 |
|
|
if ((flags & (MA_READ | MA_WRITE)) != (MA_READ | MA_WRITE))
|
727 |
|
|
goto irrelevant;
|
728 |
|
|
/* The latter test is empirically useless in very old Irix */
|
729 |
|
|
/* versions. Other than the */
|
730 |
|
|
/* main data and stack segments, everything appears to be */
|
731 |
|
|
/* mapped readable, writable, executable, and shared(!!). */
|
732 |
|
|
/* This makes no sense to me. - HB */
|
733 |
|
|
start = (ptr_t)(addr_map[i].pr_vaddr);
|
734 |
|
|
if (GC_roots_present(start)) goto irrelevant;
|
735 |
|
|
if (start < heap_end && start >= heap_start)
|
736 |
|
|
goto irrelevant;
|
737 |
|
|
# ifdef MMAP_STACKS
|
738 |
|
|
if (GC_is_thread_stack(start)) goto irrelevant;
|
739 |
|
|
# endif /* MMAP_STACKS */
|
740 |
|
|
|
741 |
|
|
limit = start + addr_map[i].pr_size;
|
742 |
|
|
/* The following seemed to be necessary for very old versions */
|
743 |
|
|
/* of Irix, but it has been reported to discard relevant */
|
744 |
|
|
/* segments under Irix 6.5. */
|
745 |
|
|
# ifndef IRIX6
|
746 |
|
|
if (addr_map[i].pr_off == 0 && strncmp(start, ELFMAG, 4) == 0) {
|
747 |
|
|
/* Discard text segments, i.e. 0-offset mappings against */
|
748 |
|
|
/* executable files which appear to have ELF headers. */
|
749 |
|
|
caddr_t arg;
|
750 |
|
|
int obj;
|
751 |
|
|
# define MAP_IRR_SZ 10
|
752 |
|
|
static ptr_t map_irr[MAP_IRR_SZ];
|
753 |
|
|
/* Known irrelevant map entries */
|
754 |
|
|
static int n_irr = 0;
|
755 |
|
|
struct stat buf;
|
756 |
|
|
register int i;
|
757 |
|
|
|
758 |
|
|
for (i = 0; i < n_irr; i++) {
|
759 |
|
|
if (map_irr[i] == start) goto irrelevant;
|
760 |
|
|
}
|
761 |
|
|
arg = (caddr_t)start;
|
762 |
|
|
obj = ioctl(fd, PIOCOPENM, &arg);
|
763 |
|
|
if (obj >= 0) {
|
764 |
|
|
fstat(obj, &buf);
|
765 |
|
|
close(obj);
|
766 |
|
|
if ((buf.st_mode & 0111) != 0) {
|
767 |
|
|
if (n_irr < MAP_IRR_SZ) {
|
768 |
|
|
map_irr[n_irr++] = start;
|
769 |
|
|
}
|
770 |
|
|
goto irrelevant;
|
771 |
|
|
}
|
772 |
|
|
}
|
773 |
|
|
}
|
774 |
|
|
# endif /* !IRIX6 */
|
775 |
|
|
GC_add_roots_inner(start, limit, TRUE);
|
776 |
|
|
irrelevant: ;
|
777 |
|
|
}
|
778 |
|
|
/* Dont keep cached descriptor, for now. Some kernels don't like us */
|
779 |
|
|
/* to keep a /proc file descriptor around during kill -9. */
|
780 |
|
|
if (close(fd) < 0) ABORT("Couldnt close /proc file");
|
781 |
|
|
fd = -1;
|
782 |
|
|
}
|
783 |
|
|
|
784 |
|
|
# endif /* USE_PROC */
|
785 |
|
|
|
786 |
|
|
# if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
|
787 |
|
|
|
788 |
|
|
# define WIN32_LEAN_AND_MEAN
|
789 |
|
|
# define NOSERVICE
|
790 |
|
|
# include <windows.h>
|
791 |
|
|
# include <stdlib.h>
|
792 |
|
|
|
793 |
|
|
/* We traverse the entire address space and register all segments */
|
794 |
|
|
/* that could possibly have been written to. */
|
795 |
|
|
|
796 |
|
|
extern GC_bool GC_is_heap_base (ptr_t p);
|
797 |
|
|
|
798 |
|
|
# ifdef GC_WIN32_THREADS
|
799 |
|
|
extern void GC_get_next_stack(char *start, char **lo, char **hi);
|
800 |
|
|
void GC_cond_add_roots(char *base, char * limit)
|
801 |
|
|
{
|
802 |
|
|
char * curr_base = base;
|
803 |
|
|
char * next_stack_lo;
|
804 |
|
|
char * next_stack_hi;
|
805 |
|
|
|
806 |
|
|
if (base == limit) return;
|
807 |
|
|
for(;;) {
|
808 |
|
|
GC_get_next_stack(curr_base, &next_stack_lo, &next_stack_hi);
|
809 |
|
|
if (next_stack_lo >= limit) break;
|
810 |
|
|
GC_add_roots_inner(curr_base, next_stack_lo, TRUE);
|
811 |
|
|
curr_base = next_stack_hi;
|
812 |
|
|
}
|
813 |
|
|
if (curr_base < limit) GC_add_roots_inner(curr_base, limit, TRUE);
|
814 |
|
|
}
|
815 |
|
|
# else
|
816 |
|
|
void GC_cond_add_roots(char *base, char * limit)
|
817 |
|
|
{
|
818 |
|
|
char dummy;
|
819 |
|
|
char * stack_top
|
820 |
|
|
= (char *) ((word)(&dummy) & ~(GC_sysinfo.dwAllocationGranularity-1));
|
821 |
|
|
if (base == limit) return;
|
822 |
|
|
if (limit > stack_top && base < GC_stackbottom) {
|
823 |
|
|
/* Part of the stack; ignore it. */
|
824 |
|
|
return;
|
825 |
|
|
}
|
826 |
|
|
GC_add_roots_inner(base, limit, TRUE);
|
827 |
|
|
}
|
828 |
|
|
# endif
|
829 |
|
|
|
830 |
|
|
# if defined(MSWINCE) || defined(CYGWIN32)
|
831 |
|
|
/* Do we need to separately register the main static data segment? */
|
832 |
|
|
GC_bool GC_register_main_static_data()
|
833 |
|
|
{
|
834 |
|
|
return FALSE;
|
835 |
|
|
}
|
836 |
|
|
# else /* win32 */
|
837 |
|
|
extern GC_bool GC_no_win32_dlls;
|
838 |
|
|
|
839 |
|
|
GC_bool GC_register_main_static_data()
|
840 |
|
|
{
|
841 |
|
|
return GC_no_win32_dlls;
|
842 |
|
|
}
|
843 |
|
|
# endif /* win32 */
|
844 |
|
|
|
845 |
|
|
# define HAVE_REGISTER_MAIN_STATIC_DATA
|
846 |
|
|
|
847 |
|
|
/* The frame buffer testing code is dead in this version. */
|
848 |
|
|
/* We leave it here temporarily in case the switch to just */
|
849 |
|
|
/* testing for MEM_IMAGE sections causes un expected */
|
850 |
|
|
/* problems. */
|
851 |
|
|
GC_bool GC_warn_fb = TRUE; /* Warn about traced likely */
|
852 |
|
|
/* graphics memory. */
|
853 |
|
|
GC_bool GC_disallow_ignore_fb = FALSE;
|
854 |
|
|
int GC_ignore_fb_mb; /* Ignore mappings bigger than the */
|
855 |
|
|
/* specified number of MB. */
|
856 |
|
|
GC_bool GC_ignore_fb = FALSE; /* Enable frame buffer */
|
857 |
|
|
/* checking. */
|
858 |
|
|
|
859 |
|
|
/* Issue warning if tracing apparent framebuffer. */
|
860 |
|
|
/* This limits us to one warning, and it's a back door to */
|
861 |
|
|
/* disable that. */
|
862 |
|
|
|
863 |
|
|
/* Should [start, start+len) be treated as a frame buffer */
|
864 |
|
|
/* and ignored? */
|
865 |
|
|
/* Unfortunately, we currently are not quite sure how to tell */
|
866 |
|
|
/* this automatically, and rely largely on user input. */
|
867 |
|
|
/* We expect that any mapping with type MEM_MAPPED (which */
|
868 |
|
|
/* apparently excludes library data sections) can be safely */
|
869 |
|
|
/* ignored. But we're too chicken to do that in this */
|
870 |
|
|
/* version. */
|
871 |
|
|
/* Based on a very limited sample, it appears that: */
|
872 |
|
|
/* - Frame buffer mappings appear as mappings of large */
|
873 |
|
|
/* length, usually a bit less than a power of two. */
|
874 |
|
|
/* - The definition of "a bit less" in the above cannot */
|
875 |
|
|
/* be made more precise. */
|
876 |
|
|
/* - Have a starting address at best 64K aligned. */
|
877 |
|
|
/* - Have type == MEM_MAPPED. */
|
878 |
|
|
static GC_bool is_frame_buffer(ptr_t start, size_t len, DWORD tp)
|
879 |
|
|
{
|
880 |
|
|
static GC_bool initialized = FALSE;
|
881 |
|
|
# define MB (1024*1024)
|
882 |
|
|
# define DEFAULT_FB_MB 15
|
883 |
|
|
# define MIN_FB_MB 3
|
884 |
|
|
|
885 |
|
|
if (GC_disallow_ignore_fb || tp != MEM_MAPPED) return FALSE;
|
886 |
|
|
if (!initialized) {
|
887 |
|
|
char * ignore_fb_string = GETENV("GC_IGNORE_FB");
|
888 |
|
|
|
889 |
|
|
if (0 != ignore_fb_string) {
|
890 |
|
|
while (*ignore_fb_string == ' ' || *ignore_fb_string == '\t')
|
891 |
|
|
++ignore_fb_string;
|
892 |
|
|
if (*ignore_fb_string == '\0') {
|
893 |
|
|
GC_ignore_fb_mb = DEFAULT_FB_MB;
|
894 |
|
|
} else {
|
895 |
|
|
GC_ignore_fb_mb = atoi(ignore_fb_string);
|
896 |
|
|
if (GC_ignore_fb_mb < MIN_FB_MB) {
|
897 |
|
|
WARN("Bad GC_IGNORE_FB value. Using %ld\n", DEFAULT_FB_MB);
|
898 |
|
|
GC_ignore_fb_mb = DEFAULT_FB_MB;
|
899 |
|
|
}
|
900 |
|
|
}
|
901 |
|
|
GC_ignore_fb = TRUE;
|
902 |
|
|
} else {
|
903 |
|
|
GC_ignore_fb_mb = DEFAULT_FB_MB; /* For warning */
|
904 |
|
|
}
|
905 |
|
|
initialized = TRUE;
|
906 |
|
|
}
|
907 |
|
|
if (len >= ((size_t)GC_ignore_fb_mb << 20)) {
|
908 |
|
|
if (GC_ignore_fb) {
|
909 |
|
|
return TRUE;
|
910 |
|
|
} else {
|
911 |
|
|
if (GC_warn_fb) {
|
912 |
|
|
WARN("Possible frame buffer mapping at 0x%lx: \n"
|
913 |
|
|
"\tConsider setting GC_IGNORE_FB to improve performance.\n",
|
914 |
|
|
start);
|
915 |
|
|
GC_warn_fb = FALSE;
|
916 |
|
|
}
|
917 |
|
|
return FALSE;
|
918 |
|
|
}
|
919 |
|
|
} else {
|
920 |
|
|
return FALSE;
|
921 |
|
|
}
|
922 |
|
|
}
|
923 |
|
|
|
924 |
|
|
# ifdef DEBUG_VIRTUALQUERY
|
925 |
|
|
void GC_dump_meminfo(MEMORY_BASIC_INFORMATION *buf)
|
926 |
|
|
{
|
927 |
|
|
GC_printf4("BaseAddress = %lx, AllocationBase = %lx, RegionSize = %lx(%lu)\n",
|
928 |
|
|
buf -> BaseAddress, buf -> AllocationBase, buf -> RegionSize,
|
929 |
|
|
buf -> RegionSize);
|
930 |
|
|
GC_printf4("\tAllocationProtect = %lx, State = %lx, Protect = %lx, "
|
931 |
|
|
"Type = %lx\n",
|
932 |
|
|
buf -> AllocationProtect, buf -> State, buf -> Protect,
|
933 |
|
|
buf -> Type);
|
934 |
|
|
}
|
935 |
|
|
# endif /* DEBUG_VIRTUALQUERY */
|
936 |
|
|
|
937 |
|
|
# ifdef CYGWIN32
|
938 |
|
|
# define GC_wnt (TRUE)
|
939 |
|
|
# else
|
940 |
|
|
extern GC_bool GC_wnt; /* Is Windows NT derivative. */
|
941 |
|
|
/* Defined and set in os_dep.c. */
|
942 |
|
|
# endif
|
943 |
|
|
|
944 |
|
|
void GC_register_dynamic_libraries()
|
945 |
|
|
{
|
946 |
|
|
MEMORY_BASIC_INFORMATION buf;
|
947 |
|
|
DWORD result;
|
948 |
|
|
DWORD protect;
|
949 |
|
|
LPVOID p;
|
950 |
|
|
char * base;
|
951 |
|
|
char * limit, * new_limit;
|
952 |
|
|
|
953 |
|
|
# ifdef MSWIN32
|
954 |
|
|
if (GC_no_win32_dlls) return;
|
955 |
|
|
# endif
|
956 |
|
|
base = limit = p = GC_sysinfo.lpMinimumApplicationAddress;
|
957 |
|
|
# if defined(MSWINCE) && !defined(_WIN32_WCE_EMULATION)
|
958 |
|
|
/* Only the first 32 MB of address space belongs to the current process */
|
959 |
|
|
while (p < (LPVOID)0x02000000) {
|
960 |
|
|
result = VirtualQuery(p, &buf, sizeof(buf));
|
961 |
|
|
if (result == 0) {
|
962 |
|
|
/* Page is free; advance to the next possible allocation base */
|
963 |
|
|
new_limit = (char *)
|
964 |
|
|
(((DWORD) p + GC_sysinfo.dwAllocationGranularity)
|
965 |
|
|
& ~(GC_sysinfo.dwAllocationGranularity-1));
|
966 |
|
|
} else
|
967 |
|
|
# else
|
968 |
|
|
while (p < GC_sysinfo.lpMaximumApplicationAddress) {
|
969 |
|
|
result = VirtualQuery(p, &buf, sizeof(buf));
|
970 |
|
|
# endif
|
971 |
|
|
{
|
972 |
|
|
if (result != sizeof(buf)) {
|
973 |
|
|
ABORT("Weird VirtualQuery result");
|
974 |
|
|
}
|
975 |
|
|
new_limit = (char *)p + buf.RegionSize;
|
976 |
|
|
protect = buf.Protect;
|
977 |
|
|
if (buf.State == MEM_COMMIT
|
978 |
|
|
&& (protect == PAGE_EXECUTE_READWRITE
|
979 |
|
|
|| protect == PAGE_READWRITE)
|
980 |
|
|
&& !GC_is_heap_base(buf.AllocationBase)
|
981 |
|
|
/* This used to check for
|
982 |
|
|
* !is_frame_buffer(p, buf.RegionSize, buf.Type)
|
983 |
|
|
* instead of just checking for MEM_IMAGE.
|
984 |
|
|
* If something breaks, change it back. */
|
985 |
|
|
/* There is some evidence that we cannot always
|
986 |
|
|
* ignore MEM_PRIVATE sections under Windows ME
|
987 |
|
|
* and predecessors. Hence we now also check for
|
988 |
|
|
* that case. */
|
989 |
|
|
&& (buf.Type == MEM_IMAGE ||
|
990 |
|
|
!GC_wnt && buf.Type == MEM_PRIVATE)) {
|
991 |
|
|
# ifdef DEBUG_VIRTUALQUERY
|
992 |
|
|
GC_dump_meminfo(&buf);
|
993 |
|
|
# endif
|
994 |
|
|
if ((char *)p != limit) {
|
995 |
|
|
GC_cond_add_roots(base, limit);
|
996 |
|
|
base = p;
|
997 |
|
|
}
|
998 |
|
|
limit = new_limit;
|
999 |
|
|
}
|
1000 |
|
|
}
|
1001 |
|
|
if (p > (LPVOID)new_limit /* overflow */) break;
|
1002 |
|
|
p = (LPVOID)new_limit;
|
1003 |
|
|
}
|
1004 |
|
|
GC_cond_add_roots(base, limit);
|
1005 |
|
|
}
|
1006 |
|
|
|
1007 |
|
|
#endif /* MSWIN32 || MSWINCE || CYGWIN32 */
|
1008 |
|
|
|
1009 |
|
|
#if defined(ALPHA) && defined(OSF1)
|
1010 |
|
|
|
1011 |
|
|
#include <loader.h>
|
1012 |
|
|
|
1013 |
|
|
void GC_register_dynamic_libraries()
|
1014 |
|
|
{
|
1015 |
|
|
int status;
|
1016 |
|
|
ldr_process_t mypid;
|
1017 |
|
|
|
1018 |
|
|
/* module */
|
1019 |
|
|
ldr_module_t moduleid = LDR_NULL_MODULE;
|
1020 |
|
|
ldr_module_info_t moduleinfo;
|
1021 |
|
|
size_t moduleinfosize = sizeof(moduleinfo);
|
1022 |
|
|
size_t modulereturnsize;
|
1023 |
|
|
|
1024 |
|
|
/* region */
|
1025 |
|
|
ldr_region_t region;
|
1026 |
|
|
ldr_region_info_t regioninfo;
|
1027 |
|
|
size_t regioninfosize = sizeof(regioninfo);
|
1028 |
|
|
size_t regionreturnsize;
|
1029 |
|
|
|
1030 |
|
|
/* Obtain id of this process */
|
1031 |
|
|
mypid = ldr_my_process();
|
1032 |
|
|
|
1033 |
|
|
/* For each module */
|
1034 |
|
|
while (TRUE) {
|
1035 |
|
|
|
1036 |
|
|
/* Get the next (first) module */
|
1037 |
|
|
status = ldr_next_module(mypid, &moduleid);
|
1038 |
|
|
|
1039 |
|
|
/* Any more modules? */
|
1040 |
|
|
if (moduleid == LDR_NULL_MODULE)
|
1041 |
|
|
break; /* No more modules */
|
1042 |
|
|
|
1043 |
|
|
/* Check status AFTER checking moduleid because */
|
1044 |
|
|
/* of a bug in the non-shared ldr_next_module stub */
|
1045 |
|
|
if (status != 0 ) {
|
1046 |
|
|
GC_printf1("dynamic_load: status = %ld\n", (long)status);
|
1047 |
|
|
{
|
1048 |
|
|
extern char *sys_errlist[];
|
1049 |
|
|
extern int sys_nerr;
|
1050 |
|
|
extern int errno;
|
1051 |
|
|
if (errno <= sys_nerr) {
|
1052 |
|
|
GC_printf1("dynamic_load: %s\n", (long)sys_errlist[errno]);
|
1053 |
|
|
} else {
|
1054 |
|
|
GC_printf1("dynamic_load: %d\n", (long)errno);
|
1055 |
|
|
}
|
1056 |
|
|
}
|
1057 |
|
|
ABORT("ldr_next_module failed");
|
1058 |
|
|
}
|
1059 |
|
|
|
1060 |
|
|
/* Get the module information */
|
1061 |
|
|
status = ldr_inq_module(mypid, moduleid, &moduleinfo,
|
1062 |
|
|
moduleinfosize, &modulereturnsize);
|
1063 |
|
|
if (status != 0 )
|
1064 |
|
|
ABORT("ldr_inq_module failed");
|
1065 |
|
|
|
1066 |
|
|
/* is module for the main program (i.e. nonshared portion)? */
|
1067 |
|
|
if (moduleinfo.lmi_flags & LDR_MAIN)
|
1068 |
|
|
continue; /* skip the main module */
|
1069 |
|
|
|
1070 |
|
|
# ifdef VERBOSE
|
1071 |
|
|
GC_printf("---Module---\n");
|
1072 |
|
|
GC_printf("Module ID = %16ld\n", moduleinfo.lmi_modid);
|
1073 |
|
|
GC_printf("Count of regions = %16d\n", moduleinfo.lmi_nregion);
|
1074 |
|
|
GC_printf("flags for module = %16lx\n", moduleinfo.lmi_flags);
|
1075 |
|
|
GC_printf("pathname of module = \"%s\"\n", moduleinfo.lmi_name);
|
1076 |
|
|
# endif
|
1077 |
|
|
|
1078 |
|
|
/* For each region in this module */
|
1079 |
|
|
for (region = 0; region < moduleinfo.lmi_nregion; region++) {
|
1080 |
|
|
|
1081 |
|
|
/* Get the region information */
|
1082 |
|
|
status = ldr_inq_region(mypid, moduleid, region, ®ioninfo,
|
1083 |
|
|
regioninfosize, ®ionreturnsize);
|
1084 |
|
|
if (status != 0 )
|
1085 |
|
|
ABORT("ldr_inq_region failed");
|
1086 |
|
|
|
1087 |
|
|
/* only process writable (data) regions */
|
1088 |
|
|
if (! (regioninfo.lri_prot & LDR_W))
|
1089 |
|
|
continue;
|
1090 |
|
|
|
1091 |
|
|
# ifdef VERBOSE
|
1092 |
|
|
GC_printf("--- Region ---\n");
|
1093 |
|
|
GC_printf("Region number = %16ld\n",
|
1094 |
|
|
regioninfo.lri_region_no);
|
1095 |
|
|
GC_printf("Protection flags = %016x\n", regioninfo.lri_prot);
|
1096 |
|
|
GC_printf("Virtual address = %16p\n", regioninfo.lri_vaddr);
|
1097 |
|
|
GC_printf("Mapped address = %16p\n", regioninfo.lri_mapaddr);
|
1098 |
|
|
GC_printf("Region size = %16ld\n", regioninfo.lri_size);
|
1099 |
|
|
GC_printf("Region name = \"%s\"\n", regioninfo.lri_name);
|
1100 |
|
|
# endif
|
1101 |
|
|
|
1102 |
|
|
/* register region as a garbage collection root */
|
1103 |
|
|
GC_add_roots_inner (
|
1104 |
|
|
(char *)regioninfo.lri_mapaddr,
|
1105 |
|
|
(char *)regioninfo.lri_mapaddr + regioninfo.lri_size,
|
1106 |
|
|
TRUE);
|
1107 |
|
|
|
1108 |
|
|
}
|
1109 |
|
|
}
|
1110 |
|
|
}
|
1111 |
|
|
#endif
|
1112 |
|
|
|
1113 |
|
|
#if defined(HPUX)
|
1114 |
|
|
|
1115 |
|
|
#include <errno.h>
|
1116 |
|
|
#include <dl.h>
|
1117 |
|
|
|
1118 |
|
|
extern int errno;
|
1119 |
|
|
extern char *sys_errlist[];
|
1120 |
|
|
extern int sys_nerr;
|
1121 |
|
|
|
1122 |
|
|
void GC_register_dynamic_libraries()
|
1123 |
|
|
{
|
1124 |
|
|
int status;
|
1125 |
|
|
int index = 1; /* Ordinal position in shared library search list */
|
1126 |
|
|
struct shl_descriptor *shl_desc; /* Shared library info, see dl.h */
|
1127 |
|
|
|
1128 |
|
|
/* For each dynamic library loaded */
|
1129 |
|
|
while (TRUE) {
|
1130 |
|
|
|
1131 |
|
|
/* Get info about next shared library */
|
1132 |
|
|
status = shl_get(index, &shl_desc);
|
1133 |
|
|
|
1134 |
|
|
/* Check if this is the end of the list or if some error occured */
|
1135 |
|
|
if (status != 0) {
|
1136 |
|
|
# ifdef GC_HPUX_THREADS
|
1137 |
|
|
/* I've seen errno values of 0. The man page is not clear */
|
1138 |
|
|
/* as to whether errno should get set on a -1 return. */
|
1139 |
|
|
break;
|
1140 |
|
|
# else
|
1141 |
|
|
if (errno == EINVAL) {
|
1142 |
|
|
break; /* Moved past end of shared library list --> finished */
|
1143 |
|
|
} else {
|
1144 |
|
|
if (errno <= sys_nerr) {
|
1145 |
|
|
GC_printf1("dynamic_load: %s\n", (long) sys_errlist[errno]);
|
1146 |
|
|
} else {
|
1147 |
|
|
GC_printf1("dynamic_load: %d\n", (long) errno);
|
1148 |
|
|
}
|
1149 |
|
|
ABORT("shl_get failed");
|
1150 |
|
|
}
|
1151 |
|
|
# endif
|
1152 |
|
|
}
|
1153 |
|
|
|
1154 |
|
|
# ifdef VERBOSE
|
1155 |
|
|
GC_printf0("---Shared library---\n");
|
1156 |
|
|
GC_printf1("\tfilename = \"%s\"\n", shl_desc->filename);
|
1157 |
|
|
GC_printf1("\tindex = %d\n", index);
|
1158 |
|
|
GC_printf1("\thandle = %08x\n",
|
1159 |
|
|
(unsigned long) shl_desc->handle);
|
1160 |
|
|
GC_printf1("\ttext seg. start = %08x\n", shl_desc->tstart);
|
1161 |
|
|
GC_printf1("\ttext seg. end = %08x\n", shl_desc->tend);
|
1162 |
|
|
GC_printf1("\tdata seg. start = %08x\n", shl_desc->dstart);
|
1163 |
|
|
GC_printf1("\tdata seg. end = %08x\n", shl_desc->dend);
|
1164 |
|
|
GC_printf1("\tref. count = %lu\n", shl_desc->ref_count);
|
1165 |
|
|
# endif
|
1166 |
|
|
|
1167 |
|
|
/* register shared library's data segment as a garbage collection root */
|
1168 |
|
|
GC_add_roots_inner((char *) shl_desc->dstart,
|
1169 |
|
|
(char *) shl_desc->dend, TRUE);
|
1170 |
|
|
|
1171 |
|
|
index++;
|
1172 |
|
|
}
|
1173 |
|
|
}
|
1174 |
|
|
#endif /* HPUX */
|
1175 |
|
|
|
1176 |
|
|
#ifdef RS6000
|
1177 |
|
|
#pragma alloca
|
1178 |
|
|
#include <sys/ldr.h>
|
1179 |
|
|
#include <sys/errno.h>
|
1180 |
|
|
void GC_register_dynamic_libraries()
|
1181 |
|
|
{
|
1182 |
|
|
int len;
|
1183 |
|
|
char *ldibuf;
|
1184 |
|
|
int ldibuflen;
|
1185 |
|
|
struct ld_info *ldi;
|
1186 |
|
|
|
1187 |
|
|
ldibuf = alloca(ldibuflen = 8192);
|
1188 |
|
|
|
1189 |
|
|
while ( (len = loadquery(L_GETINFO,ldibuf,ldibuflen)) < 0) {
|
1190 |
|
|
if (errno != ENOMEM) {
|
1191 |
|
|
ABORT("loadquery failed");
|
1192 |
|
|
}
|
1193 |
|
|
ldibuf = alloca(ldibuflen *= 2);
|
1194 |
|
|
}
|
1195 |
|
|
|
1196 |
|
|
ldi = (struct ld_info *)ldibuf;
|
1197 |
|
|
while (ldi) {
|
1198 |
|
|
len = ldi->ldinfo_next;
|
1199 |
|
|
GC_add_roots_inner(
|
1200 |
|
|
ldi->ldinfo_dataorg,
|
1201 |
|
|
(ptr_t)(unsigned long)ldi->ldinfo_dataorg
|
1202 |
|
|
+ ldi->ldinfo_datasize,
|
1203 |
|
|
TRUE);
|
1204 |
|
|
ldi = len ? (struct ld_info *)((char *)ldi + len) : 0;
|
1205 |
|
|
}
|
1206 |
|
|
}
|
1207 |
|
|
#endif /* RS6000 */
|
1208 |
|
|
|
1209 |
|
|
#ifdef DARWIN
|
1210 |
|
|
|
1211 |
|
|
/* __private_extern__ hack required for pre-3.4 gcc versions. */
|
1212 |
|
|
#ifndef __private_extern__
|
1213 |
|
|
# define __private_extern__ extern
|
1214 |
|
|
# include <mach-o/dyld.h>
|
1215 |
|
|
# undef __private_extern__
|
1216 |
|
|
#else
|
1217 |
|
|
# include <mach-o/dyld.h>
|
1218 |
|
|
#endif
|
1219 |
|
|
#include <mach-o/getsect.h>
|
1220 |
|
|
|
1221 |
|
|
/*#define DARWIN_DEBUG*/
|
1222 |
|
|
|
1223 |
|
|
/* Writeable sections generally available on Darwin. */
|
1224 |
|
|
const static struct {
|
1225 |
|
|
const char *seg;
|
1226 |
|
|
const char *sect;
|
1227 |
|
|
} GC_dyld_sections[] = {
|
1228 |
|
|
{ SEG_DATA, SECT_DATA },
|
1229 |
|
|
/* Used by FSF GCC, but not by OSX system tools, so far. */
|
1230 |
|
|
{ SEG_DATA, "__static_data" },
|
1231 |
|
|
{ SEG_DATA, SECT_BSS },
|
1232 |
|
|
{ SEG_DATA, SECT_COMMON },
|
1233 |
|
|
/* FSF GCC - zero-sized object sections for targets supporting section
|
1234 |
|
|
anchors. */
|
1235 |
|
|
{ SEG_DATA, "__zobj_data" },
|
1236 |
|
|
{ SEG_DATA, "__zobj_bss" }
|
1237 |
|
|
};
|
1238 |
|
|
|
1239 |
|
|
/* Additional writeable sections:
|
1240 |
|
|
|
1241 |
|
|
GCC on Darwin constucts aligned sections "on demand", where the alignment
|
1242 |
|
|
size is embedded in the section name. Furthermore, there are distintions
|
1243 |
|
|
between sections containing private vs. public symbols.
|
1244 |
|
|
|
1245 |
|
|
It also constructs sections specifically for zero-sized objects, when the
|
1246 |
|
|
target supports section anchors. */
|
1247 |
|
|
const char * GC_dyld_add_sect_fmts[] =
|
1248 |
|
|
{
|
1249 |
|
|
"__bss%u",
|
1250 |
|
|
"__pu_bss%u",
|
1251 |
|
|
"__zo_bss%u",
|
1252 |
|
|
"__zo_pu_bss%u",
|
1253 |
|
|
NULL
|
1254 |
|
|
} ;
|
1255 |
|
|
|
1256 |
|
|
/* Currently, mach-o will allow up to a max of 2^15 alignment in an
|
1257 |
|
|
object file. */
|
1258 |
|
|
#define L2_MAX_OFILE_ALIGNMENT 15
|
1259 |
|
|
|
1260 |
|
|
|
1261 |
|
|
#ifdef DARWIN_DEBUG
|
1262 |
|
|
static const char *
|
1263 |
|
|
GC_dyld_name_for_hdr (const struct GC_MACH_HEADER *hdr)
|
1264 |
|
|
{
|
1265 |
|
|
unsigned long i,c;
|
1266 |
|
|
c = _dyld_image_count();
|
1267 |
|
|
for (i=0;i<c;i++)
|
1268 |
|
|
if(_dyld_get_image_header(i) == hdr)
|
1269 |
|
|
return _dyld_get_image_name(i);
|
1270 |
|
|
return NULL;
|
1271 |
|
|
}
|
1272 |
|
|
#endif
|
1273 |
|
|
|
1274 |
|
|
|
1275 |
|
|
/* This should never be called by a thread holding the lock */
|
1276 |
|
|
static void
|
1277 |
|
|
GC_dyld_image_add (const struct GC_MACH_HEADER *hdr, intptr_t slide)
|
1278 |
|
|
{
|
1279 |
|
|
char secnam[16];
|
1280 |
|
|
unsigned long start,end,i,j;
|
1281 |
|
|
const struct GC_MACH_SECTION *sec;
|
1282 |
|
|
const char *fmt;
|
1283 |
|
|
|
1284 |
|
|
if (GC_no_dls)
|
1285 |
|
|
return;
|
1286 |
|
|
|
1287 |
|
|
for (i=0; i<sizeof(GC_dyld_sections)/sizeof(GC_dyld_sections[0]); i++)
|
1288 |
|
|
{
|
1289 |
|
|
sec = GC_GETSECTBYNAME (hdr, GC_dyld_sections[i].seg,
|
1290 |
|
|
GC_dyld_sections[i].sect);
|
1291 |
|
|
if(sec == NULL || sec->size == 0)
|
1292 |
|
|
continue;
|
1293 |
|
|
|
1294 |
|
|
start = slide + sec->addr;
|
1295 |
|
|
end = start + sec->size;
|
1296 |
|
|
|
1297 |
|
|
# ifdef DARWIN_DEBUG
|
1298 |
|
|
GC_printf5("Adding section __DATA,%s at %p-%p (%lu bytes) from image %s\n",
|
1299 |
|
|
GC_dyld_sections[i].sect, start,end,sec->size,GC_dyld_name_for_hdr(hdr));
|
1300 |
|
|
# endif
|
1301 |
|
|
GC_add_roots((char*)start,(char*)end);
|
1302 |
|
|
}
|
1303 |
|
|
|
1304 |
|
|
/* Sections constructed on demand. */
|
1305 |
|
|
j=0;
|
1306 |
|
|
while ((fmt = GC_dyld_add_sect_fmts[j]) != NULL)
|
1307 |
|
|
{
|
1308 |
|
|
/* Add our manufactured aligned BSS sections. */
|
1309 |
|
|
for (i=0; i<=L2_MAX_OFILE_ALIGNMENT; i++)
|
1310 |
|
|
{
|
1311 |
|
|
snprintf (secnam, 16, fmt, (unsigned)i);
|
1312 |
|
|
sec = GC_GETSECTBYNAME (hdr, SEG_DATA, secnam);
|
1313 |
|
|
if (sec == NULL || sec->size == 0)
|
1314 |
|
|
continue;
|
1315 |
|
|
start = slide + sec->addr;
|
1316 |
|
|
end = start + sec->size;
|
1317 |
|
|
# ifdef DARWIN_DEBUG
|
1318 |
|
|
GC_printf5("Adding section __DATA,%s at %p-%p (%lu bytes) from image %s\n",
|
1319 |
|
|
secnam, start,end,sec->size,GC_dyld_name_for_hdr(hdr));
|
1320 |
|
|
# endif
|
1321 |
|
|
GC_add_roots((char*)start,(char*)end);
|
1322 |
|
|
}
|
1323 |
|
|
j++;
|
1324 |
|
|
}
|
1325 |
|
|
# ifdef DARWIN_DEBUG
|
1326 |
|
|
GC_print_static_roots();
|
1327 |
|
|
# endif
|
1328 |
|
|
}
|
1329 |
|
|
|
1330 |
|
|
/* This should never be called by a thread holding the lock */
|
1331 |
|
|
static void
|
1332 |
|
|
GC_dyld_image_remove (const struct GC_MACH_HEADER *hdr, intptr_t slide)
|
1333 |
|
|
{
|
1334 |
|
|
char secnam[16];
|
1335 |
|
|
unsigned long start,end,i,j;
|
1336 |
|
|
const struct GC_MACH_SECTION *sec;
|
1337 |
|
|
const char *fmt;
|
1338 |
|
|
|
1339 |
|
|
for (i=0; i<sizeof(GC_dyld_sections)/sizeof(GC_dyld_sections[0]); i++)
|
1340 |
|
|
{
|
1341 |
|
|
sec = GC_GETSECTBYNAME (hdr, GC_dyld_sections[i].seg,
|
1342 |
|
|
GC_dyld_sections[i].sect);
|
1343 |
|
|
if(sec == NULL || sec->size == 0)
|
1344 |
|
|
continue;
|
1345 |
|
|
|
1346 |
|
|
start = slide + sec->addr;
|
1347 |
|
|
end = start + sec->size;
|
1348 |
|
|
# ifdef DARWIN_DEBUG
|
1349 |
|
|
GC_printf5("Removing section __DATA,%s at %p-%p (%lu bytes) from image %s\n",
|
1350 |
|
|
GC_dyld_sections[i].sect, start,end,sec->size,GC_dyld_name_for_hdr(hdr));
|
1351 |
|
|
# endif
|
1352 |
|
|
GC_remove_roots((char*)start,(char*)end);
|
1353 |
|
|
}
|
1354 |
|
|
|
1355 |
|
|
/* Remove our on-demand sections. */
|
1356 |
|
|
j=0;
|
1357 |
|
|
while ((fmt = GC_dyld_add_sect_fmts[j]) != NULL)
|
1358 |
|
|
{
|
1359 |
|
|
for (i=0; i<=L2_MAX_OFILE_ALIGNMENT; i++)
|
1360 |
|
|
{
|
1361 |
|
|
snprintf (secnam, 16, fmt, (unsigned)i);
|
1362 |
|
|
sec = GC_GETSECTBYNAME (hdr, SEG_DATA, secnam);
|
1363 |
|
|
if (sec == NULL || sec->size == 0)
|
1364 |
|
|
continue;
|
1365 |
|
|
start = slide + sec->addr;
|
1366 |
|
|
end = start + sec->size;
|
1367 |
|
|
# ifdef DARWIN_DEBUG
|
1368 |
|
|
GC_printf5("Removing section __DATA,%s at %p-%p (%lu bytes) from image %s\n",
|
1369 |
|
|
secnam, start,end,sec->size,GC_dyld_name_for_hdr(hdr));
|
1370 |
|
|
# endif
|
1371 |
|
|
GC_remove_roots((char*)start,(char*)end);
|
1372 |
|
|
}
|
1373 |
|
|
j++;
|
1374 |
|
|
}
|
1375 |
|
|
|
1376 |
|
|
# ifdef DARWIN_DEBUG
|
1377 |
|
|
GC_print_static_roots();
|
1378 |
|
|
# endif
|
1379 |
|
|
}
|
1380 |
|
|
|
1381 |
|
|
void
|
1382 |
|
|
GC_register_dynamic_libraries()
|
1383 |
|
|
{
|
1384 |
|
|
/* Currently does nothing. The callbacks are setup by GC_init_dyld()
|
1385 |
|
|
The dyld library takes it from there. */
|
1386 |
|
|
}
|
1387 |
|
|
|
1388 |
|
|
/* The _dyld_* functions have an internal lock so no _dyld functions
|
1389 |
|
|
can be called while the world is stopped without the risk of a deadlock.
|
1390 |
|
|
Because of this we MUST setup callbacks BEFORE we ever stop the world.
|
1391 |
|
|
This should be called BEFORE any thread in created and WITHOUT the
|
1392 |
|
|
allocation lock held. */
|
1393 |
|
|
|
1394 |
|
|
void
|
1395 |
|
|
GC_init_dyld()
|
1396 |
|
|
{
|
1397 |
|
|
static GC_bool initialized = FALSE;
|
1398 |
|
|
char *bind_fully_env = NULL;
|
1399 |
|
|
|
1400 |
|
|
if(initialized)
|
1401 |
|
|
return;
|
1402 |
|
|
|
1403 |
|
|
# ifdef DARWIN_DEBUG
|
1404 |
|
|
GC_printf0("Registering dyld callbacks...\n");
|
1405 |
|
|
# endif
|
1406 |
|
|
|
1407 |
|
|
/* Apple's Documentation:
|
1408 |
|
|
When you call _dyld_register_func_for_add_image, the dynamic linker runtime
|
1409 |
|
|
calls the specified callback (func) once for each of the images that is
|
1410 |
|
|
currently loaded into the program. When a new image is added to the program,
|
1411 |
|
|
your callback is called again with the mach_header for the new image, and the
|
1412 |
|
|
virtual memory slide amount of the new image.
|
1413 |
|
|
|
1414 |
|
|
This WILL properly register already linked libraries and libraries
|
1415 |
|
|
linked in the future
|
1416 |
|
|
*/
|
1417 |
|
|
|
1418 |
|
|
_dyld_register_func_for_add_image(GC_dyld_image_add);
|
1419 |
|
|
_dyld_register_func_for_remove_image(GC_dyld_image_remove);
|
1420 |
|
|
|
1421 |
|
|
/* Set this early to avoid reentrancy issues. */
|
1422 |
|
|
initialized = TRUE;
|
1423 |
|
|
|
1424 |
|
|
bind_fully_env = getenv("DYLD_BIND_AT_LAUNCH");
|
1425 |
|
|
|
1426 |
|
|
if (bind_fully_env == NULL)
|
1427 |
|
|
{
|
1428 |
|
|
# ifdef DARWIN_DEBUG
|
1429 |
|
|
GC_printf0("Forcing full bind of GC code...\n");
|
1430 |
|
|
# endif
|
1431 |
|
|
|
1432 |
|
|
if (!_dyld_bind_fully_image_containing_address((unsigned long*)GC_malloc))
|
1433 |
|
|
GC_abort("_dyld_bind_fully_image_containing_address failed");
|
1434 |
|
|
}
|
1435 |
|
|
}
|
1436 |
|
|
|
1437 |
|
|
#define HAVE_REGISTER_MAIN_STATIC_DATA
|
1438 |
|
|
GC_bool
|
1439 |
|
|
GC_register_main_static_data (void)
|
1440 |
|
|
{
|
1441 |
|
|
/* Already done through dyld callbacks */
|
1442 |
|
|
return FALSE;
|
1443 |
|
|
}
|
1444 |
|
|
|
1445 |
|
|
#endif /* DARWIN */
|
1446 |
|
|
|
1447 |
|
|
#else /* !DYNAMIC_LOADING */
|
1448 |
|
|
|
1449 |
|
|
#ifdef PCR
|
1450 |
|
|
|
1451 |
|
|
# include "il/PCR_IL.h"
|
1452 |
|
|
# include "th/PCR_ThCtl.h"
|
1453 |
|
|
# include "mm/PCR_MM.h"
|
1454 |
|
|
|
1455 |
|
|
void GC_register_dynamic_libraries()
|
1456 |
|
|
{
|
1457 |
|
|
/* Add new static data areas of dynamically loaded modules. */
|
1458 |
|
|
{
|
1459 |
|
|
PCR_IL_LoadedFile * p = PCR_IL_GetLastLoadedFile();
|
1460 |
|
|
PCR_IL_LoadedSegment * q;
|
1461 |
|
|
|
1462 |
|
|
/* Skip uncommited files */
|
1463 |
|
|
while (p != NIL && !(p -> lf_commitPoint)) {
|
1464 |
|
|
/* The loading of this file has not yet been committed */
|
1465 |
|
|
/* Hence its description could be inconsistent. */
|
1466 |
|
|
/* Furthermore, it hasn't yet been run. Hence its data */
|
1467 |
|
|
/* segments can't possibly reference heap allocated */
|
1468 |
|
|
/* objects. */
|
1469 |
|
|
p = p -> lf_prev;
|
1470 |
|
|
}
|
1471 |
|
|
for (; p != NIL; p = p -> lf_prev) {
|
1472 |
|
|
for (q = p -> lf_ls; q != NIL; q = q -> ls_next) {
|
1473 |
|
|
if ((q -> ls_flags & PCR_IL_SegFlags_Traced_MASK)
|
1474 |
|
|
== PCR_IL_SegFlags_Traced_on) {
|
1475 |
|
|
GC_add_roots_inner
|
1476 |
|
|
((char *)(q -> ls_addr),
|
1477 |
|
|
(char *)(q -> ls_addr) + q -> ls_bytes,
|
1478 |
|
|
TRUE);
|
1479 |
|
|
}
|
1480 |
|
|
}
|
1481 |
|
|
}
|
1482 |
|
|
}
|
1483 |
|
|
}
|
1484 |
|
|
|
1485 |
|
|
|
1486 |
|
|
#else /* !PCR */
|
1487 |
|
|
|
1488 |
|
|
void GC_register_dynamic_libraries(){}
|
1489 |
|
|
|
1490 |
|
|
int GC_no_dynamic_loading;
|
1491 |
|
|
|
1492 |
|
|
#endif /* !PCR */
|
1493 |
|
|
|
1494 |
|
|
#endif /* !DYNAMIC_LOADING */
|
1495 |
|
|
|
1496 |
|
|
#ifndef HAVE_REGISTER_MAIN_STATIC_DATA
|
1497 |
|
|
|
1498 |
|
|
/* Do we need to separately register the main static data segment? */
|
1499 |
|
|
GC_bool GC_register_main_static_data()
|
1500 |
|
|
{
|
1501 |
|
|
return TRUE;
|
1502 |
|
|
}
|
1503 |
|
|
#endif /* HAVE_REGISTER_MAIN_STATIC_DATA */
|
1504 |
|
|
|