diff options
| -rw-r--r-- | vm_dump.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -475,8 +475,8 @@ darwin_sigtramp: unw_set_reg(&cursor, UNW_X86_64_R14, uctx->uc_mcontext->__ss.__r14); unw_set_reg(&cursor, UNW_X86_64_R15, uctx->uc_mcontext->__ss.__r15); ip = uctx->uc_mcontext->__ss.__rip; - if (((char*)ip)[-2] == 0x0f && ((char*)ip)[-1] == 5) { - /* signal received in syscall */ + if (!ip || (((char*)ip)[-2] == 0x0f && ((char*)ip)[-1] == 5)) { + /* NULL reference or signal received in syscall */ trace[n++] = (void *)ip; ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp; } |