diff options
Diffstat (limited to 'tests/backtrace-data.c')
| -rw-r--r-- | tests/backtrace-data.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/tests/backtrace-data.c b/tests/backtrace-data.c index b7158dae..a387d8ff 100644 --- a/tests/backtrace-data.c +++ b/tests/backtrace-data.c @@ -76,10 +76,15 @@ memory_read (Dwfl *dwfl, Dwarf_Addr addr, Dwarf_Word *result, errno = 0; long l = ptrace (PTRACE_PEEKDATA, child, (void *) (uintptr_t) addr, NULL); - assert (errno == 0); + + // The unwinder can ask for an invalid address. + // Don't assert on that but just politely refuse. + if (errno != 0) { + errno = 0; + return false; + } *result = l; - /* We could also return false for failed ptrace. */ return true; } @@ -103,7 +108,8 @@ maps_lookup (pid_t pid, Dwarf_Addr addr, GElf_Addr *basep) unsigned long start, end, offset; i = fscanf (f, "%lx-%lx %*s %lx %*x:%*x %*x", &start, &end, &offset); assert (errno == 0); - assert (i == 3); + if (i != 3) + break; char *filename = strdup (""); assert (filename); size_t filename_len = 0; @@ -131,6 +137,8 @@ maps_lookup (pid_t pid, Dwarf_Addr addr, GElf_Addr *basep) } free (filename); } + *basep = 0; + return NULL; } /* Add module containing ADDR to the DWFL address space. @@ -145,6 +153,8 @@ report_module (Dwfl *dwfl, pid_t child, Dwarf_Addr addr) { GElf_Addr base; char *long_name = maps_lookup (child, addr, &base); + if (!long_name) + return NULL; // not found Dwfl_Module *mod = dwfl_report_elf (dwfl, long_name, long_name, -1, base, false /* add_p_vaddr */); assert (mod); |