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Code Issues Releases Activity

(do_backtrace): Keep track of initial IP so we can issue better error messages.

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(main): Update comment for -t.

(Logical change 1.276)
This commit is contained in:
hp.com!davidm 2004-10-15 13:48:38 +00:00
parent b4f1459444
commit b0048ee762
1 changed files with 9 additions and 5 deletions
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12
tests/test-ptrace.c
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@ -70,7 +70,7 @@ do_backtrace (pid_t target_pid)
{ {
int n = 0, ret; int n = 0, ret;
unw_proc_info_t pi; unw_proc_info_t pi;
unw_word_t ip, sp; unw_word_t ip, sp, start_ip;
unw_cursor_t c; unw_cursor_t c;
char buf[512]; char buf[512];
@ -84,6 +84,9 @@ do_backtrace (pid_t target_pid)
|| (ret = unw_get_reg (&c, UNW_REG_SP, &sp)) < 0) || (ret = unw_get_reg (&c, UNW_REG_SP, &sp)) < 0)
panic ("unw_get_reg/unw_get_proc_name() failed: ret=%d\n", ret); panic ("unw_get_reg/unw_get_proc_name() failed: ret=%d\n", ret);
if (n == 0)
start_ip = ip;
buf[0] = '\0'; buf[0] = '\0';
if (print_names) if (print_names)
unw_get_proc_name (&c, buf, sizeof (buf), NULL); unw_get_proc_name (&c, buf, sizeof (buf), NULL);
@ -115,8 +118,8 @@ do_backtrace (pid_t target_pid)
if (ret < 0) if (ret < 0)
{ {
unw_get_reg (&c, UNW_REG_IP, &ip); unw_get_reg (&c, UNW_REG_IP, &ip);
panic ("FAILURE: unw_step() returned %d for ip=%lx\n", panic ("FAILURE: unw_step() returned %d for ip=%lx (start ip=%lx)\n",
ret, (long) ip); ret, (long) ip, (long) start_ip);
} }
if (++n > 32) if (++n > 32)
@ -162,7 +165,8 @@ main (int argc, char **argv)
else if (strcmp (argv[optind], "-s") == 0) else if (strcmp (argv[optind], "-s") == 0)
++optind, trace_mode = SYSCALL; /* backtrace at each syscall */ ++optind, trace_mode = SYSCALL; /* backtrace at each syscall */
else if (strcmp (argv[optind], "-t") == 0) else if (strcmp (argv[optind], "-t") == 0)
/* Execute until syscall(-1), then backtrace at each insn. */ /* Execute until raise(SIGUSR1), then backtrace at each insn
until raise(SIGUSR2). */
++optind, trace_mode = TRIGGER; ++optind, trace_mode = TRIGGER;
else if (strcmp (argv[optind], "-c") == 0) else if (strcmp (argv[optind], "-c") == 0)
/* Enable caching of unwind-info. */ /* Enable caching of unwind-info. */