35b621c5f4
Previously, we'd collect every stack frame and then throw some away when we came to log them. This meant that stack traces were effectively shorter than the buffers that had been allocated for them. This patch only stores frames we'll actually output. Also dynamically call the C++ demangler so we don't have to try to read mangled names. Because no one knows the mangling of operator new[] for int arrays off the top of their head. Bug: 7291287 Change-Id: I42b022fd7cd61675d05171de4c3b2704d058ef2a
97 lines
3.0 KiB
C++
97 lines
3.0 KiB
C++
/*
|
|
* Copyright (C) 2012 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "dlmalloc.h"
|
|
#include "debug_mapinfo.h"
|
|
|
|
// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so
|
|
// 012345678901234567890123456789012345678901234567890123456789
|
|
// 0 1 2 3 4 5
|
|
|
|
static mapinfo_t* parse_maps_line(char* line) {
|
|
int len = strlen(line);
|
|
|
|
if (len < 1) return 0;
|
|
line[--len] = 0;
|
|
|
|
if (len < 50) return 0;
|
|
if (line[20] != 'x') return 0;
|
|
|
|
mapinfo_t* mi = static_cast<mapinfo_t*>(dlmalloc(sizeof(mapinfo_t) + (len - 47)));
|
|
if (mi == 0) return 0;
|
|
|
|
mi->start = strtoul(line, 0, 16);
|
|
mi->end = strtoul(line + 9, 0, 16);
|
|
mi->next = 0;
|
|
strcpy(mi->name, line + 49);
|
|
|
|
return mi;
|
|
}
|
|
|
|
__LIBC_HIDDEN__ mapinfo_t* mapinfo_create(pid_t pid) {
|
|
struct mapinfo_t* milist = NULL;
|
|
char data[1024]; // Used to read lines as well as to construct the filename.
|
|
snprintf(data, sizeof(data), "/proc/%d/maps", pid);
|
|
FILE* fp = fopen(data, "r");
|
|
if (fp != NULL) {
|
|
while (fgets(data, sizeof(data), fp) != NULL) {
|
|
mapinfo_t* mi = parse_maps_line(data);
|
|
if (mi) {
|
|
mi->next = milist;
|
|
milist = mi;
|
|
}
|
|
}
|
|
fclose(fp);
|
|
}
|
|
return milist;
|
|
}
|
|
|
|
__LIBC_HIDDEN__ void mapinfo_destroy(mapinfo_t* mi) {
|
|
while (mi != NULL) {
|
|
mapinfo_t* del = mi;
|
|
mi = mi->next;
|
|
dlfree(del);
|
|
}
|
|
}
|
|
|
|
// Find the containing map info for the PC.
|
|
__LIBC_HIDDEN__ const mapinfo_t* mapinfo_find(mapinfo_t* mi, uintptr_t pc, uintptr_t* rel_pc) {
|
|
for (; mi != NULL; mi = mi->next) {
|
|
if ((pc >= mi->start) && (pc < mi->end)) {
|
|
*rel_pc = pc - mi->start;
|
|
return mi;
|
|
}
|
|
}
|
|
*rel_pc = pc;
|
|
return NULL;
|
|
}
|