lib: libc backtrace_append() - Remove directory paths from binary names

The backtrace unnecessarily contained directory paths, causing the backtrace
to become excessively large just repeating the directories.

This change is only for libc backtrace, not for libunwind backtrace.

diff --git a/src/lib/backtrace-string.c b/src/lib/backtrace-string.c
index a2806a47fb0f4feecfff866a7002995e70c907d1..b50827c381618fc4c0fbd7551af49857af6f14c8 100644 (file)
--- a/src/lib/backtrace-string.c
+++ b/src/lib/backtrace-string.c
@@ -83,8 +83,18 @@ static int backtrace_append_libc(string_t *str)
                        /* out of memory case */
                        str_printfa(str, "0x%p", stack[i]);
                } else if (str_len(str) != str_orig_size ||
-                          !str_begins_with(strings[i], BACKTRACE_SKIP_PREFIX))
-                       str_append(str, strings[i]);
+                          !str_begins_with(strings[i], BACKTRACE_SKIP_PREFIX)) {
+                       /* String often contains a full path to the binary,
+                          followed by the function name. The path causes the
+                          backtrace to be excessively large and we don't
+                          especially care about it, so just skip over it. */
+                       const char *suffix = strrchr(strings[i], '/');
+                       if (suffix != NULL)
+                               suffix++;
+                       else
+                               suffix = strings[i];
+                       str_append(str, suffix);
+               }
        }
        free(strings);
        return 0;