glebfm/strace
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Less ugly debug display of ptrace events

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* strace.c (trace): Less ugly debug display of ptrace events.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2012-03-13 12:05:27 +01:00
parent 6bc050cc54
commit 67559ad260
1 changed files with 21 additions and 19 deletions
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40
strace.c
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@ -1816,24 +1816,7 @@ trace(void)
event = ((unsigned)status >> 16);
if (debug) {
char buf[sizeof("WIFEXITED,exitcode=%u") + sizeof(int)*3 /*paranoia:*/ + 16];
if (event != 0) {
static const char *const event_names[] = {
[PTRACE_EVENT_CLONE] = "CLONE",
[PTRACE_EVENT_FORK] = "FORK",
[PTRACE_EVENT_VFORK] = "VFORK",
[PTRACE_EVENT_VFORK_DONE] = "VFORK_DONE",
[PTRACE_EVENT_EXEC] = "EXEC",
[PTRACE_EVENT_EXIT] = "EXIT",
};
const char *e;
if (event < ARRAY_SIZE(event_names))
e = event_names[event];
else {
sprintf(buf, "?? (%u)", event);
e = buf;
}
fprintf(stderr, " PTRACE_EVENT_%s", e);
}
char evbuf[sizeof(",PTRACE_EVENT_?? (%u)") + sizeof(int)*3 /*paranoia:*/ + 16];
strcpy(buf, "???");
if (WIFSIGNALED(status))
#ifdef WCOREDUMP
@ -1852,7 +1835,26 @@ trace(void)
if (WIFCONTINUED(status))
strcpy(buf, "WIFCONTINUED");
#endif
fprintf(stderr, " [wait(0x%04x) = %u] %s\n", status, pid, buf);
evbuf[0] = '\0';
if (event != 0) {
static const char *const event_names[] = {
[PTRACE_EVENT_CLONE] = "CLONE",
[PTRACE_EVENT_FORK] = "FORK",
[PTRACE_EVENT_VFORK] = "VFORK",
[PTRACE_EVENT_VFORK_DONE] = "VFORK_DONE",
[PTRACE_EVENT_EXEC] = "EXEC",
[PTRACE_EVENT_EXIT] = "EXIT",
};
const char *e;
if (event < ARRAY_SIZE(event_names))
e = event_names[event];
else {
sprintf(buf, "?? (%u)", event);
e = buf;
}
sprintf(evbuf, ",PTRACE_EVENT_%s", e);
}
fprintf(stderr, " [wait(0x%04x) = %u] %s%s\n", status, pid, buf, evbuf);
}
/* Look up 'pid' in our table. */