Remove unused file.
This file should have been deleted with the malloc debug rewrite, but popped back into existence due to a merge conflict. Change-Id: I74e53daaf3febf650b20e3da5329558ac84c5bcd
This commit is contained in:
Christopher Ferris
parent
172420e6a2
commit
2fc7f9db3d
1 changed files with 0 additions and 556 deletions
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@ -1,556 +0,0 @@
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/*
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* Copyright (C) 2009 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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// Contains definition of structures, global variables, and implementation of
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// routines that are used by malloc leak detection code and other components in
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// the system. The trick is that some components expect these data and
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// routines to be defined / implemented in libc.so, regardless whether or not
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// malloc leak detection code is going to run. To make things even more tricky,
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// malloc leak detection code, implemented in libc_malloc_debug.so also
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// requires access to these variables and routines (to fill allocation entry
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// hash table, for example). So, all relevant variables and routines are
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// defined / implemented here and exported to all, leak detection code and
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// other components via dynamic (libc.so), or static (libc.a) linking.
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#include "malloc_debug_common.h"
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "private/bionic_globals.h"
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#include "private/ScopedPthreadMutexLocker.h"
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#include "jemalloc.h"
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#define Malloc(function) je_ ## function
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static constexpr MallocDebug __libc_malloc_default_dispatch
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__attribute__((unused)) = {
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Malloc(calloc),
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Malloc(free),
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Malloc(mallinfo),
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Malloc(malloc),
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Malloc(malloc_usable_size),
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Malloc(memalign),
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Malloc(posix_memalign),
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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Malloc(pvalloc),
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#endif
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Malloc(realloc),
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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Malloc(valloc),
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#endif
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};
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// In a VM process, this is set to 1 after fork()ing out of zygote.
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int gMallocLeakZygoteChild = 0;
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static HashTable g_hash_table;
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// Handle to shared library where actual memory allocation is implemented.
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// This library is loaded and memory allocation calls are redirected there
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// when libc.debug.malloc environment variable contains value other than
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// zero:
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// 1 - For memory leak detections.
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// 5 - For filling allocated / freed memory with patterns defined by
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// CHK_SENTINEL_VALUE, and CHK_FILL_FREE macros.
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// 10 - For adding pre-, and post- allocation stubs in order to detect
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// buffer overruns.
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// Note that emulator's memory allocation instrumentation is not controlled by
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// libc.debug.malloc value, but rather by emulator, started with -memcheck
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// option. Note also, that if emulator has started with -memcheck option,
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// emulator's instrumented memory allocation will take over value saved in
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// libc.debug.malloc. In other words, if emulator has started with -memcheck
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// option, libc.debug.malloc value is ignored.
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// Actual functionality for debug levels 1-10 is implemented in
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// libc_malloc_debug_leak.so, while functionality for emulator's instrumented
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// allocations is implemented in libc_malloc_debug_qemu.so and can be run inside
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// the emulator only.
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#if !defined(LIBC_STATIC)
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static void* libc_malloc_impl_handle = NULL;
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#endif
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// The value of libc.debug.malloc.
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#if !defined(LIBC_STATIC)
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static int g_malloc_debug_level = 0;
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#endif
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// =============================================================================
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// output functions
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// =============================================================================
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static int hash_entry_compare(const void* arg1, const void* arg2) {
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int result;
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const HashEntry* e1 = *static_cast<HashEntry* const*>(arg1);
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const HashEntry* e2 = *static_cast<HashEntry* const*>(arg2);
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// if one or both arg pointers are null, deal gracefully
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if (e1 == NULL) {
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result = (e2 == NULL) ? 0 : 1;
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} else if (e2 == NULL) {
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result = -1;
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} else {
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size_t nbAlloc1 = e1->allocations;
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size_t nbAlloc2 = e2->allocations;
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size_t size1 = e1->size & ~SIZE_FLAG_MASK;
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size_t size2 = e2->size & ~SIZE_FLAG_MASK;
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size_t alloc1 = nbAlloc1 * size1;
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size_t alloc2 = nbAlloc2 * size2;
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// sort in descending order by:
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// 1) total size
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// 2) number of allocations
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//
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// This is used for sorting, not determination of equality, so we don't
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// need to compare the bit flags.
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if (alloc1 > alloc2) {
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result = -1;
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} else if (alloc1 < alloc2) {
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result = 1;
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} else {
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if (nbAlloc1 > nbAlloc2) {
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result = -1;
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} else if (nbAlloc1 < nbAlloc2) {
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result = 1;
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} else {
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result = 0;
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}
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}
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}
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return result;
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}
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// Retrieve native heap information.
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//
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// "*info" is set to a buffer we allocate
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// "*overallSize" is set to the size of the "info" buffer
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// "*infoSize" is set to the size of a single entry
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// "*totalMemory" is set to the sum of all allocations we're tracking; does
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// not include heap overhead
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// "*backtraceSize" is set to the maximum number of entries in the back trace
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// =============================================================================
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// Exported for use by ddms.
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// =============================================================================
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extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
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size_t* infoSize, size_t* totalMemory, size_t* backtraceSize) {
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// Don't do anything if we have invalid arguments.
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if (info == NULL || overallSize == NULL || infoSize == NULL ||
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totalMemory == NULL || backtraceSize == NULL) {
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return;
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}
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*totalMemory = 0;
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ScopedPthreadMutexLocker locker(&g_hash_table.lock);
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if (g_hash_table.count == 0) {
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*info = NULL;
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*overallSize = 0;
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*infoSize = 0;
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*backtraceSize = 0;
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return;
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}
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HashEntry** list = static_cast<HashEntry**>(Malloc(malloc)(sizeof(void*) * g_hash_table.count));
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// Get the entries into an array to be sorted.
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size_t index = 0;
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for (size_t i = 0 ; i < HASHTABLE_SIZE ; ++i) {
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HashEntry* entry = g_hash_table.slots[i];
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while (entry != NULL) {
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list[index] = entry;
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*totalMemory = *totalMemory + ((entry->size & ~SIZE_FLAG_MASK) * entry->allocations);
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index++;
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entry = entry->next;
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}
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}
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// XXX: the protocol doesn't allow variable size for the stack trace (yet)
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*infoSize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * BACKTRACE_SIZE);
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*overallSize = *infoSize * g_hash_table.count;
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*backtraceSize = BACKTRACE_SIZE;
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// now get a byte array big enough for this
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*info = static_cast<uint8_t*>(Malloc(malloc)(*overallSize));
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if (*info == NULL) {
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*overallSize = 0;
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Malloc(free)(list);
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return;
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}
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qsort(list, g_hash_table.count, sizeof(void*), hash_entry_compare);
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uint8_t* head = *info;
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const size_t count = g_hash_table.count;
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for (size_t i = 0 ; i < count ; ++i) {
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HashEntry* entry = list[i];
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size_t entrySize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * entry->numEntries);
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if (entrySize < *infoSize) {
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// We're writing less than a full entry, clear out the rest.
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memset(head + entrySize, 0, *infoSize - entrySize);
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} else {
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// Make sure the amount we're copying doesn't exceed the limit.
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entrySize = *infoSize;
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}
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memcpy(head, &(entry->size), entrySize);
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head += *infoSize;
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}
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Malloc(free)(list);
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}
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extern "C" void free_malloc_leak_info(uint8_t* info) {
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Malloc(free)(info);
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}
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// =============================================================================
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// Allocation functions
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// =============================================================================
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extern "C" void* calloc(size_t n_elements, size_t elem_size) {
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auto _calloc = __libc_globals->malloc_dispatch.calloc;
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if (__predict_false(_calloc != nullptr)) {
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return _calloc(n_elements, elem_size);
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}
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return Malloc(calloc)(n_elements, elem_size);
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}
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extern "C" void free(void* mem) {
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auto _free = __libc_globals->malloc_dispatch.free;
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if (__predict_false(_free != nullptr)) {
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_free(mem);
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} else {
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Malloc(free)(mem);
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}
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}
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extern "C" struct mallinfo mallinfo() {
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auto _mallinfo = __libc_globals->malloc_dispatch.mallinfo;
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if (__predict_false(_mallinfo != nullptr)) {
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return _mallinfo();
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}
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return Malloc(mallinfo)();
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}
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extern "C" void* malloc(size_t bytes) {
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auto _malloc = __libc_globals->malloc_dispatch.malloc;
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if (__predict_false(_malloc != nullptr)) {
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return _malloc(bytes);
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}
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return Malloc(malloc)(bytes);
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}
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extern "C" size_t malloc_usable_size(const void* mem) {
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auto _malloc_usable_size = __libc_globals->malloc_dispatch.malloc_usable_size;
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if (__predict_false(_malloc_usable_size != nullptr)) {
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return _malloc_usable_size(mem);
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}
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return Malloc(malloc_usable_size)(mem);
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}
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extern "C" void* memalign(size_t alignment, size_t bytes) {
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auto _memalign = __libc_globals->malloc_dispatch.memalign;
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if (__predict_false(_memalign != nullptr)) {
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return _memalign(alignment, bytes);
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}
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return Malloc(memalign)(alignment, bytes);
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}
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extern "C" int posix_memalign(void** memptr, size_t alignment, size_t size) {
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auto _posix_memalign = __libc_globals->malloc_dispatch.posix_memalign;
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if (__predict_false(_posix_memalign != nullptr)) {
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return _posix_memalign(memptr, alignment, size);
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}
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return Malloc(posix_memalign)(memptr, alignment, size);
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}
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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extern "C" void* pvalloc(size_t bytes) {
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auto _pvalloc = __libc_globals->malloc_dispatch.pvalloc;
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if (__predict_false(_pvalloc != nullptr)) {
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return _pvalloc(bytes);
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}
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return Malloc(pvalloc)(bytes);
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}
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#endif
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extern "C" void* realloc(void* old_mem, size_t bytes) {
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auto _realloc = __libc_globals->malloc_dispatch.realloc;
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if (__predict_false(_realloc != nullptr)) {
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return _realloc(old_mem, bytes);
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}
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return Malloc(realloc)(old_mem, bytes);
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}
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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extern "C" void* valloc(size_t bytes) {
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auto _valloc = __libc_globals->malloc_dispatch.valloc;
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if (__predict_false(_valloc != nullptr)) {
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return _valloc(bytes);
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}
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return Malloc(valloc)(bytes);
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}
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#endif
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// We implement malloc debugging only in libc.so, so the code below
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// must be excluded if we compile this file for static libc.a
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#ifndef LIBC_STATIC
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#include <sys/system_properties.h>
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#include <dlfcn.h>
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#include <stdio.h>
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#include "private/libc_logging.h"
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template<typename FunctionType>
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static void InitMallocFunction(void* malloc_impl_handler, FunctionType* func, const char* prefix, const char* suffix) {
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char symbol[128];
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snprintf(symbol, sizeof(symbol), "%s_%s", prefix, suffix);
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*func = reinterpret_cast<FunctionType>(dlsym(malloc_impl_handler, symbol));
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if (*func == NULL) {
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error_log("%s: dlsym(\"%s\") failed", getprogname(), symbol);
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}
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}
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static void InitMalloc(void* malloc_impl_handler, MallocDebug* table, const char* prefix) {
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__libc_format_log(ANDROID_LOG_INFO, "libc", "%s: using libc.debug.malloc %d (%s)\n",
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getprogname(), g_malloc_debug_level, prefix);
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InitMallocFunction<MallocDebugCalloc>(malloc_impl_handler, &table->calloc, prefix, "calloc");
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InitMallocFunction<MallocDebugFree>(malloc_impl_handler, &table->free, prefix, "free");
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InitMallocFunction<MallocDebugMallinfo>(malloc_impl_handler, &table->mallinfo, prefix, "mallinfo");
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InitMallocFunction<MallocDebugMalloc>(malloc_impl_handler, &table->malloc, prefix, "malloc");
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InitMallocFunction<MallocDebugMallocUsableSize>(malloc_impl_handler, &table->malloc_usable_size, prefix, "malloc_usable_size");
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InitMallocFunction<MallocDebugMemalign>(malloc_impl_handler, &table->memalign, prefix, "memalign");
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InitMallocFunction<MallocDebugPosixMemalign>(malloc_impl_handler, &table->posix_memalign, prefix, "posix_memalign");
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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InitMallocFunction<MallocDebugPvalloc>(malloc_impl_handler, &table->pvalloc, prefix, "pvalloc");
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#endif
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InitMallocFunction<MallocDebugRealloc>(malloc_impl_handler, &table->realloc, prefix, "realloc");
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#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
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InitMallocFunction<MallocDebugValloc>(malloc_impl_handler, &table->valloc, prefix, "valloc");
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#endif
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}
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// Initializes memory allocation framework once per process.
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static void malloc_init_impl(libc_globals* globals) {
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const char* so_name = NULL;
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MallocDebugInit malloc_debug_initialize = NULL;
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unsigned int qemu_running = 0;
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unsigned int memcheck_enabled = 0;
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char env[PROP_VALUE_MAX];
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char memcheck_tracing[PROP_VALUE_MAX];
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char debug_program[PROP_VALUE_MAX];
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// Get custom malloc debug level. Note that emulator started with
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// memory checking option will have priority over debug level set in
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// libc.debug.malloc system property.
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if (__system_property_get("ro.kernel.qemu", env) && atoi(env)) {
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qemu_running = 1;
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if (__system_property_get("ro.kernel.memcheck", memcheck_tracing)) {
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if (memcheck_tracing[0] != '0') {
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// Emulator has started with memory tracing enabled. Enforce it.
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g_malloc_debug_level = 20;
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memcheck_enabled = 1;
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}
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}
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}
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// If debug level has not been set by memcheck option in the emulator,
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// lets grab it from libc.debug.malloc system property.
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if (g_malloc_debug_level == 0 && __system_property_get("libc.debug.malloc", env)) {
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g_malloc_debug_level = atoi(env);
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}
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// Debug level 0 means that we should use default allocation routines.
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if (g_malloc_debug_level == 0) {
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return;
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}
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// If libc.debug.malloc.program is set and is not a substring of progname,
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// then exit.
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if (__system_property_get("libc.debug.malloc.program", debug_program)) {
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if (!strstr(getprogname(), debug_program)) {
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return;
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}
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}
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// mksh is way too leaky. http://b/7291287.
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if (g_malloc_debug_level >= 10) {
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if (strcmp(getprogname(), "sh") == 0 || strcmp(getprogname(), "/system/bin/sh") == 0) {
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return;
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}
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}
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// Choose the appropriate .so for the requested debug level.
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switch (g_malloc_debug_level) {
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case 1:
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case 5:
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case 10:
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so_name = "libc_malloc_debug_leak.so";
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break;
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case 20:
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// Quick check: debug level 20 can only be handled in emulator.
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if (!qemu_running) {
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error_log("%s: Debug level %d can only be set in emulator\n",
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getprogname(), g_malloc_debug_level);
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return;
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}
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// Make sure that memory checking has been enabled in emulator.
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if (!memcheck_enabled) {
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error_log("%s: Memory checking is not enabled in the emulator\n", getprogname());
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return;
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}
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so_name = "libc_malloc_debug_qemu.so";
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break;
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default:
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error_log("%s: Debug level %d is unknown\n", getprogname(), g_malloc_debug_level);
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return;
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}
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// Load .so that implements the required malloc debugging functionality.
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void* malloc_impl_handle = dlopen(so_name, RTLD_NOW);
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if (malloc_impl_handle == NULL) {
|
||||
error_log("%s: Missing module %s required for malloc debug level %d: %s",
|
||||
getprogname(), so_name, g_malloc_debug_level, dlerror());
|
||||
return;
|
||||
}
|
||||
|
||||
// Initialize malloc debugging in the loaded module.
|
||||
malloc_debug_initialize = reinterpret_cast<MallocDebugInit>(dlsym(malloc_impl_handle,
|
||||
"malloc_debug_initialize"));
|
||||
if (malloc_debug_initialize == NULL) {
|
||||
error_log("%s: Initialization routine is not found in %s\n", getprogname(), so_name);
|
||||
dlclose(malloc_impl_handle);
|
||||
return;
|
||||
}
|
||||
if (!malloc_debug_initialize(&g_hash_table, &__libc_malloc_default_dispatch)) {
|
||||
dlclose(malloc_impl_handle);
|
||||
return;
|
||||
}
|
||||
|
||||
if (g_malloc_debug_level == 20) {
|
||||
// For memory checker we need to do extra initialization.
|
||||
typedef int (*MemCheckInit)(int, const char*);
|
||||
MemCheckInit memcheck_initialize =
|
||||
reinterpret_cast<MemCheckInit>(dlsym(malloc_impl_handle, "memcheck_initialize"));
|
||||
if (memcheck_initialize == NULL) {
|
||||
error_log("%s: memcheck_initialize routine is not found in %s\n",
|
||||
getprogname(), so_name);
|
||||
dlclose(malloc_impl_handle);
|
||||
return;
|
||||
}
|
||||
|
||||
if (memcheck_initialize(MALLOC_ALIGNMENT, memcheck_tracing)) {
|
||||
dlclose(malloc_impl_handle);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
// No need to init the dispatch table because we can only get
|
||||
// here if debug level is 1, 5, 10, or 20.
|
||||
MallocDebug malloc_dispatch_table;
|
||||
switch (g_malloc_debug_level) {
|
||||
case 1:
|
||||
InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "leak");
|
||||
break;
|
||||
case 5:
|
||||
InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "fill");
|
||||
break;
|
||||
case 10:
|
||||
InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "chk");
|
||||
break;
|
||||
case 20:
|
||||
InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "qemu_instrumented");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
// Make sure dispatch table is initialized
|
||||
if ((malloc_dispatch_table.calloc == NULL) ||
|
||||
(malloc_dispatch_table.free == NULL) ||
|
||||
(malloc_dispatch_table.mallinfo == NULL) ||
|
||||
(malloc_dispatch_table.malloc == NULL) ||
|
||||
(malloc_dispatch_table.malloc_usable_size == NULL) ||
|
||||
(malloc_dispatch_table.memalign == NULL) ||
|
||||
(malloc_dispatch_table.posix_memalign == NULL) ||
|
||||
#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
|
||||
(malloc_dispatch_table.pvalloc == NULL) ||
|
||||
#endif
|
||||
(malloc_dispatch_table.realloc == NULL)
|
||||
#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
|
||||
|| (malloc_dispatch_table.valloc == NULL)
|
||||
#endif
|
||||
) {
|
||||
error_log("%s: some symbols for libc.debug.malloc level %d were not found (see above)",
|
||||
getprogname(), g_malloc_debug_level);
|
||||
dlclose(malloc_impl_handle);
|
||||
} else {
|
||||
globals->malloc_dispatch = malloc_dispatch_table;
|
||||
libc_malloc_impl_handle = malloc_impl_handle;
|
||||
}
|
||||
}
|
||||
|
||||
static void malloc_fini_impl() {
|
||||
if (libc_malloc_impl_handle != NULL) {
|
||||
MallocDebugFini malloc_debug_finalize =
|
||||
reinterpret_cast<MallocDebugFini>(dlsym(libc_malloc_impl_handle, "malloc_debug_finalize"));
|
||||
if (malloc_debug_finalize != NULL) {
|
||||
// Our BSD stdio implementation doesn't close the standard streams,
|
||||
// it only flushes them. And it doesn't do that until its atexit
|
||||
// handler is run, and we run first! It's great that other unclosed
|
||||
// FILE*s show up as malloc leaks, but we need to manually clean up
|
||||
// the standard streams ourselves.
|
||||
fclose(stdin);
|
||||
fclose(stdout);
|
||||
fclose(stderr);
|
||||
|
||||
malloc_debug_finalize(g_malloc_debug_level);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif // !LIBC_STATIC
|
||||
|
||||
// Initializes memory allocation framework.
|
||||
// This routine is called from __libc_init routines in libc_init_dynamic.cpp.
|
||||
__LIBC_HIDDEN__ void __libc_init_malloc(libc_globals* globals) {
|
||||
(void)globals;
|
||||
#if !defined(LIBC_STATIC)
|
||||
malloc_init_impl(globals);
|
||||
#endif
|
||||
}
|
||||
|
||||
extern "C" __LIBC_HIDDEN__ void malloc_debug_fini() {
|
||||
#if !defined(LIBC_STATIC)
|
||||
static pthread_once_t malloc_fini_once_ctl = PTHREAD_ONCE_INIT;
|
||||
if (pthread_once(&malloc_fini_once_ctl, malloc_fini_impl)) {
|
||||
error_log("Unable to finalize malloc_debug component.");
|
||||
}
|
||||
#endif // !LIBC_STATIC
|
||||
}
|
||||
Loading…
Reference in a new issue