am 7af7895e: Merge "Use the new non-allocating logging for dlmalloc failures."
* commit '7af7895eeb810ff1a1ca8b60fcda13595d551114': Use the new non-allocating logging for dlmalloc failures.
This commit is contained in:
Elliott Hughes
Android Git Automerger
commit
0609c0fe8d
1 changed files with 52 additions and 86 deletions
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@ -16,102 +16,68 @@
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#include "dlmalloc.h"
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/* Bionic error handling declarations */
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <linux/ashmem.h>
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#include <private/debug_format.h>
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#include <private/logd.h>
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// Send dlmalloc errors to the log.
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static void __bionic_heap_corruption_error(const char* function);
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static void __bionic_heap_usage_error(const char* function, void* address);
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#define PROCEED_ON_ERROR 0
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static void __bionic_heap_error(const char* msg, const char* function, void* p);
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#define CORRUPTION_ERROR_ACTION(m) \
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__bionic_heap_error("HEAP MEMORY CORRUPTION", __FUNCTION__, NULL)
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#define USAGE_ERROR_ACTION(m,p) \
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__bionic_heap_error("ARGUMENT IS INVALID HEAP ADDRESS", __FUNCTION__, p)
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#define CORRUPTION_ERROR_ACTION(m) __bionic_heap_corruption_error(__FUNCTION__)
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#define USAGE_ERROR_ACTION(m,p) __bionic_heap_usage_error(__FUNCTION__, p)
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/* Bionic named anonymous memory declarations */
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static void* named_anonymous_mmap(size_t length);
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#define MMAP(s) named_anonymous_mmap(s)
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// We use ashmem to name the anonymous private regions created by dlmalloc.
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static void* __bionic_named_anonymous_mmap(size_t length);
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#define MMAP(s) __bionic_named_anonymous_mmap(s)
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/*
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* Ugly inclusion of C file so that bionic specific #defines configure
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* dlmalloc.
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*/
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// Ugly inclusion of C file so that bionic specific #defines configure dlmalloc.
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#include "../upstream-dlmalloc/malloc.c"
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/* Bionic error handling definitions */
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/* Convert a pointer into hex string */
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static void __bionic_itox(char* hex, void* ptr)
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{
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intptr_t val = (intptr_t) ptr;
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/* Terminate with NULL */
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hex[8] = 0;
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int i;
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for (i = 7; i >= 0; i--) {
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int digit = val & 15;
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hex[i] = (digit <= 9) ? digit + '0' : digit - 10 + 'a';
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val >>= 4;
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}
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static void __bionic_heap_corruption_error(const char* function) {
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__libc_format_log(ANDROID_LOG_FATAL, "libc", "@@@ ABORTING: heap corruption detected by %s",
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function);
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abort();
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}
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#include <private/logd.h>
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static void __bionic_heap_error(const char* msg, const char* function, void* p)
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{
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/* We format the buffer explicitely, i.e. without using snprintf()
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* which may use malloc() internally. Not something we can trust
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* if we just detected a corrupted heap.
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*/
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char buffer[256];
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strlcpy(buffer, "@@@ ABORTING: LIBC: ", sizeof(buffer));
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strlcat(buffer, msg, sizeof(buffer));
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if (function != NULL) {
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strlcat(buffer, " IN ", sizeof(buffer));
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strlcat(buffer, function, sizeof(buffer));
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}
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if (p != NULL) {
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char hexbuffer[9];
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__bionic_itox(hexbuffer, p);
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strlcat(buffer, " addr=0x", sizeof(buffer));
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strlcat(buffer, hexbuffer, sizeof(buffer));
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}
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__libc_android_log_write(ANDROID_LOG_FATAL, "libc", buffer);
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/* So that we can get a memory dump around p */
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*((int **) 0xdeadbaad) = (int *) p;
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static void __bionic_heap_usage_error(const char* function, void* address) {
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__libc_format_log(ANDROID_LOG_FATAL, "libc", "@@@ ABORTING: invalid address %p passed to %s",
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address, function);
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// So that we can get a memory dump around the specific address.
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*((int**) 0xdeadbaad) = (int*) address;
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}
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/* Bionic named anonymous memory definitions */
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#include <linux/ashmem.h>
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static int __ashmem_create_region(const char* name, size_t size)
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{
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int fd, ret;
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fd = open("/dev/ashmem", O_RDWR);
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if (fd < 0)
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return fd;
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if (name != NULL) {
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char buf[ASHMEM_NAME_LEN];
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strlcpy(buf, name, sizeof(buf));
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ret = ioctl(fd, ASHMEM_SET_NAME, buf);
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if (ret < 0) { /* error */
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close(fd);
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return ret;
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}
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}
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ret = ioctl(fd, ASHMEM_SET_SIZE, size);
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if (ret < 0) { /* error */
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close(fd);
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return ret;
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}
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static int __ashmem_create_region(const char* name, size_t size) {
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int fd = open("/dev/ashmem", O_RDWR);
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if (fd == -1) {
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return fd;
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}
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int rc = ioctl(fd, ASHMEM_SET_NAME, name);
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if (rc < 0) {
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close(fd);
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return rc;
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}
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rc = ioctl(fd, ASHMEM_SET_SIZE, size);
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if (rc < 0) {
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close(fd);
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return rc;
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}
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return fd;
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}
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static void* named_anonymous_mmap(size_t length)
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{
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void* ret;
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int fd = __ashmem_create_region("libc malloc", length);
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if (fd < 0)
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return MAP_FAILED;
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ret = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
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close (fd);
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return ret;
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static void* __bionic_named_anonymous_mmap(size_t length) {
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int fd = __ashmem_create_region("libc malloc", length);
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if (fd < 0) {
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return MAP_FAILED;
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}
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void* result = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
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close (fd);
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return result;
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}
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