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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/kernel.h>
#include "util/dso.h"
#include "util/util.h"
#include "util/debug.h"
static int addr2line(const char *dso_name, unsigned long addr,
char **file, unsigned int *line_nr)
{
FILE *fp;
char cmd[PATH_MAX];
char *filename = NULL;
size_t len;
char *sep;
int ret = 0;
scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
dso_name, addr);
fp = popen(cmd, "r");
if (fp == NULL) {
pr_warning("popen failed for %s\n", dso_name);
return 0;
}
if (getline(&filename, &len, fp) < 0 || !len) {
pr_warning("addr2line has no output for %s\n", dso_name);
goto out;
}
sep = strchr(filename, '\n');
if (sep)
*sep = '\0';
if (!strcmp(filename, "??:0")) {
pr_debug("no debugging info in %s\n", dso_name);
free(filename);
goto out;
}
sep = strchr(filename, ':');
if (sep) {
*sep++ = '\0';
*file = filename;
*line_nr = strtoul(sep, NULL, 0);
ret = 1;
}
out:
pclose(fp);
return ret;
}
char *get_srcline(struct dso *dso, unsigned long addr)
{
char *file;
unsigned line;
char *srcline;
char *dso_name = dso->long_name;
size_t size;
if (!dso->has_srcline)
return SRCLINE_UNKNOWN;
if (dso_name[0] == '[')
goto out;
if (!strncmp(dso_name, "/tmp/perf-", 10))
goto out;
if (!addr2line(dso_name, addr, &file, &line))
goto out;
/* just calculate actual length */
size = snprintf(NULL, 0, "%s:%u", file, line) + 1;
srcline = malloc(size);
if (srcline)
snprintf(srcline, size, "%s:%u", file, line);
else
srcline = SRCLINE_UNKNOWN;
free(file);
return srcline;
out:
dso->has_srcline = 0;
return SRCLINE_UNKNOWN;
}
void free_srcline(char *srcline)
{
if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
free(srcline);
}
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