d8d67b618f
may call calloc(large number), which causes ptmalloc2 to call mmap, which causes us to try to dlsym for mmap, which leads to looping badness. This commit was SVN r8461.
130 строки
3.4 KiB
C
130 строки
3.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <sys/types.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#if defined(HAVE___MUNMAP)
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/* here so we only include dlfcn if we absolutely have to */
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#elif defined(HAVE_DLSYM)
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#ifndef __USE_GNU
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#define __USE_GNU
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#endif
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#include <dlfcn.h>
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#elif defined(HAVE_SYSCALL)
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#include <syscall.h>
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#include <unistd.h>
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#endif
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#include "opal/memoryhooks/memory_internal.h"
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/*
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* munmap is always intercepted
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*/
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int opal_mem_free_ptmalloc2_munmap(void *start, size_t length);
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#if defined(HAVE___MUNMAP)
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int __munmap(void* addr, size_t len);
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#endif
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/* intercept munmap, as the user can give back memory that way as well. */
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int
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munmap(void* addr, size_t len)
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{
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return opal_mem_free_ptmalloc2_munmap(addr, len);
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}
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/* three ways to call munmap. Prefered is to just call syscall, so
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that we can intercept both munmap and __munmap. If that isn't
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possible, try calling __munmap from munmap and let __munmap go. If
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that doesn't work, try dlsym */
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int
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opal_mem_free_ptmalloc2_munmap(void *start, size_t length)
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{
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#if !defined(HAVE___MUNMAP) && defined(HAVE_DLSYM)
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static int (*realmunmap)(void*, size_t);
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#endif
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opal_mem_hooks_release_hook(start, length);
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#if defined(HAVE___MUNMAP)
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return __munmap(start, length);
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#elif defined(HAVE_DLSYM)
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if (NULL == realmunmap) {
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union {
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int (*munmap_fp)(void*, size_t);
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void *munmap_p;
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} tmp;
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tmp.munmap_p = dlsym(RTLD_NEXT, "munmap");
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realmunmap = tmp.munmap_fp;
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}
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return realmunmap(start, length);
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#elif defined(HAVE_SYSCALL)
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return syscall(__NR_munmap, start, length);
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#else
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#error "Can not determine how to call munmap"
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#endif
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}
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/*
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* mmap is only intercepted if we have a chance of finding it (ie, a
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* syscall or weak symbol)
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*/
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void* opal_mem_free_ptmalloc2_mmap(void *start, size_t length,
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int prot, int flags,
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int fd, off_t offset);
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#if defined(HAVE___MMAP)
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void* __mmap(void *start, size_t length, int prot, int flags,
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int fd, off_t offset);
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void*
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mmap(void *start, size_t length, int prot, int flags,
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int fd, off_t offset)
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{
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return opal_mem_free_ptmalloc2_mmap(start, length, prot, flags,
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fd, offset);
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}
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#endif /* defined(HAVE___MMAP) */
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void* opal_mem_free_ptmalloc2_mmap(void *start, size_t length,
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int prot, int flags,
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int fd, off_t offset)
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{
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void *tmp;
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#if defined(HAVE___MMAP)
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tmp = __mmap(start, length, prot, flags, fd, offset);
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#else
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tmp = mmap(start, length, prot, flags, fd, offset);
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#endif
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opal_mem_hooks_alloc_hook(tmp, length);
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return tmp;
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}
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