gecko/tools/profiler/shared-libraries-linux.cc
2012-05-21 12:12:37 +01:00

70 lines
1.8 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#define PATH_MAX_TOSTRING(x) #x
#define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x)
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include "platform.h"
#include "shared-libraries.h"
#ifndef __GLIBC__
/* a crapy version of getline, because it's not included in bionic */
static ssize_t getline(char **lineptr, size_t *n, FILE *stream)
{
char *ret;
if (!*lineptr) {
*lineptr = (char*)malloc(4096);
}
ret = fgets(*lineptr, 4096, stream);
if (!ret)
return 0;
return strlen(*lineptr);
}
#endif
SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf()
{
pid_t pid = getpid();
SharedLibraryInfo info;
char path[PATH_MAX];
snprintf(path, PATH_MAX, "/proc/%d/maps", pid);
FILE *maps = fopen(path, "r");
char *line = NULL;
int count = 0;
size_t line_size = 0;
while (maps && getline (&line, &line_size, maps) > 0) {
int ret;
//XXX: needs input sanitizing
unsigned long start;
unsigned long end;
char perm[6] = "";
unsigned long offset;
char name[PATH_MAX] = "";
ret = sscanf(line,
"%lx-%lx %6s %lx %*s %*x %" PATH_MAX_STRING(PATH_MAX) "s\n",
&start, &end, perm, &offset, name);
if (!strchr(perm, 'x')) {
// Ignore non executable entries
continue;
}
if (ret != 5 && ret != 4) {
LOG("Get maps line failed");
continue;
}
SharedLibrary shlib(start, end, offset, name);
info.AddSharedLibrary(shlib);
if (count > 10000) {
LOG("Get maps failed");
break;
}
count++;
}
free(line);
return info;
}