c4d1fecc10
Also clean up cpplint.py-detected lint. Change-Id: Ia18e89c4c6878764f8d7ed34b8247e7a8d8fe88b
120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
/*
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* Copyright (C) 2012 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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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "dlmalloc.h"
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#include "malloc_debug_check_mapinfo.h"
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// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so
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// 012345678901234567890123456789012345678901234567890123456789
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// 0 1 2 3 4 5
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static mapinfo* parse_maps_line(char* line) {
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int len = strlen(line);
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if (len < 1) return 0;
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line[--len] = 0;
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if (len < 50) return 0;
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if (line[20] != 'x') return 0;
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mapinfo* mi = static_cast<mapinfo*>(dlmalloc(sizeof(mapinfo) + (len - 47)));
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if (mi == 0) return 0;
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mi->start = strtoul(line, 0, 16);
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mi->end = strtoul(line + 9, 0, 16);
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/* To be filled in parse_elf_info if the mapped section starts with
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* elf_header
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*/
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mi->next = 0;
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strcpy(mi->name, line + 49);
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return mi;
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}
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__LIBC_HIDDEN__
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mapinfo *init_mapinfo(int pid) {
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struct mapinfo *milist = NULL;
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char data[1024]; // Used to read lines as well as to construct the filename.
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snprintf(data, sizeof(data), "/proc/%d/maps", pid);
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FILE *fp = fopen(data, "r");
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if (fp) {
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while (fgets(data, sizeof(data), fp)) {
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mapinfo *mi = parse_maps_line(data);
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if (mi) {
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mi->next = milist;
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milist = mi;
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}
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}
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fclose(fp);
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}
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return milist;
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}
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__LIBC_HIDDEN__
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void deinit_mapinfo(mapinfo *mi) {
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mapinfo *del;
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while (mi) {
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del = mi;
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mi = mi->next;
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dlfree(del);
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}
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}
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/* Map a pc address to the name of the containing ELF file */
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__LIBC_HIDDEN__
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const char *map_to_name(mapinfo *mi, unsigned pc, const char* def) {
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while (mi) {
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if ((pc >= mi->start) && (pc < mi->end)) {
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return mi->name;
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}
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mi = mi->next;
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}
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return def;
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}
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/* Find the containing map info for the pc */
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__LIBC_HIDDEN__
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const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc) {
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*rel_pc = pc;
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while (mi) {
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if ((pc >= mi->start) && (pc < mi->end)) {
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// Only calculate the relative offset for shared libraries
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if (strstr(mi->name, ".so")) {
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*rel_pc -= mi->start;
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}
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return mi;
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}
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mi = mi->next;
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}
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return NULL;
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}
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