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Print /proc/<pid>/maps on segfault

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This commit is contained in:
Drew DeVault 2016-01-28 07:56:46 -05:00
parent a6e57dd7ac
commit e5bb08cc18
3 changed files with 47 additions and 1 deletions
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20
common/log.c
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@ -1,5 +1,6 @@
#include "log.h"
#include "sway.h"
#include "readline.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
@ -142,6 +143,9 @@ void error_handler(int sig) {
void *array[max_lines];
char **bt;
size_t bt_len;
char maps_file[256];
char maps_buffer[1024];
FILE *maps;
sway_log(L_ERROR, "Error: Signal %d. Printing backtrace", sig);
bt_len = backtrace(array, max_lines);
@ -155,6 +159,22 @@ void error_handler(int sig) {
for (i = 0; (size_t)i < bt_len; i++) {
sway_log(L_ERROR, "Backtrace: %s", bt[i]);
}
sway_log(L_ERROR, "Maps:");
pid_t pid = getpid();
if (snprintf(maps_file, 255, "/proc/%zd/maps", (size_t)pid) < 255) {
maps = fopen(maps_file, "r");
while (!feof(maps)) {
char *m = read_line_buffer(maps, maps_buffer, 1024);
if (!m) {
fclose(maps);
sway_log(L_ERROR, "Unable to allocate memory to show maps");
break;
}
sway_log(L_ERROR, m);
}
fclose(maps);
}
#else
sway_log(L_ERROR, "Error: Signal %d.", sig);
#endif