diff options
Diffstat (limited to 'strace.c')
| -rw-r--r-- | strace.c | 33 |
1 files changed, 33 insertions, 0 deletions
@@ -50,6 +50,10 @@ extern char **environ; extern int optind; extern char *optarg; +#ifdef USE_LIBUNWIND +/* if this is true do the stack trace for every system call */ +bool stack_trace_enabled = false; +#endif #if defined __NR_tkill # define my_tkill(tid, sig) syscall(__NR_tkill, (tid), (sig)) @@ -233,6 +237,10 @@ usage: strace [-CdffhiqrtttTvVxxy] [-I n] [-e expr]...\n\ -E var -- remove var from the environment for command\n\ -P path -- trace accesses to path\n\ " +#ifdef USE_LIBUNWIND +"-k obtain stack trace between each syscall\n\ +" +#endif /* ancient, no one should use it -F -- attempt to follow vforks (deprecated, use -f)\n\ */ @@ -695,6 +703,12 @@ alloctcb(int pid) #if SUPPORTED_PERSONALITIES > 1 tcp->currpers = current_personality; #endif + +#ifdef USE_LIBUNWIND + if (stack_trace_enabled) + init_libunwind_ui(tcp); +#endif + nprocs++; if (debug_flag) fprintf(stderr, "new tcb for pid %d, active tcbs:%d\n", tcp->pid, nprocs); @@ -731,6 +745,12 @@ droptcb(struct tcb *tcp) if (printing_tcp == tcp) printing_tcp = NULL; +#ifdef USE_LIBUNWIND + if (stack_trace_enabled) { + delete_mmap_cache(tcp); + free_libunwind_ui(tcp); + } +#endif memset(tcp, 0, sizeof(*tcp)); } @@ -1653,6 +1673,9 @@ init(int argc, char *argv[]) qualify("signal=all"); while ((c = getopt(argc, argv, "+b:cCdfFhiqrtTvVwxyz" +#ifdef USE_LIBUNWIND + "k" +#endif "D" "a:e:o:O:p:s:S:u:E:P:I:")) != EOF) { switch (c) { @@ -1758,6 +1781,11 @@ init(int argc, char *argv[]) case 'u': username = strdup(optarg); break; +#ifdef USE_LIBUNWIND + case 'k': + stack_trace_enabled = true; + break; +#endif case 'E': if (putenv(optarg) < 0) die_out_of_memory(); @@ -1789,6 +1817,11 @@ init(int argc, char *argv[]) error_msg_and_die("-D and -p are mutually exclusive"); } +#ifdef USE_LIBUNWIND + if (stack_trace_enabled) + init_unwind_addr_space(); +#endif + if (!followfork) followfork = optF; |