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