Commit 56e3f056 authored by Nick Mathewson's avatar Nick Mathewson 🎨
Browse files

Tests for backtrace.c

These need to be a separate executable, since the point of backtrace.c
is that it can crash and write stuff.
parent 0cf23431
......@@ -164,9 +164,11 @@
/src/test/bench
/src/test/bench.exe
/src/test/test
/src/test/test-bt-cl
/src/test/test-child
/src/test/test-ntor-cl
/src/test/test.exe
/src/test/test-bt-cl.exe
/src/test/test-child.exe
/src/test/test-ntor-cl.exe
......
# Copyright 2013, The Tor Project, Inc
# See LICENSE for licensing information
"""
bt_test.py
This file tests the output from test-bt-cl to make sure it's as expected.
Example usage:
$ ./src/test/test-bt-cl crash | ./src/test/bt_test.py
OK
$ ./src/test/test-bt-cl assert | ./src/test/bt_test.py
OK
"""
import sys
def matches(lines, funcs):
if len(lines) < len(funcs):
return False
try:
for l, f in zip(lines, funcs):
l.index(f)
except ValueError:
return False
else:
return True
FUNCNAMES = "crash oh_what a_tangled_web we_weave main".split()
LINES = sys.stdin.readlines()
for I in range(len(LINES)):
if matches(LINES[I:], FUNCNAMES):
print "OK"
break
else:
print "BAD"
......@@ -77,3 +77,11 @@ src_test_test_ntor_cl_AM_CPPFLAGS = \
endif
noinst_PROGRAMS += src/test/test-bt-cl
src_test_test_bt_cl_SOURCES = src/test/test_bt_cl.c
src_test_test_bt_cl_LDADD = src/common/libor-testing.a \
@TOR_LIB_MATH@ \
@TOR_LIB_WS32@ @TOR_LIB_GDI@
src_test_test_bt_cl_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
src_test_test_bt_cl_CPPFLAGS= $(src_test_AM_CPPFLAGS)
/* Copyright (c) 2012-2013, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "orconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include "or.h"
#include "util.h"
#include "backtrace.h"
#include "torlog.h"
/* -1: no crash.
* 0: crash with a segmentation fault.
* 1x: crash with an assertion failure. */
static int crashtype = 0;
#ifdef __GNUC__
#define NOINLINE __attribute__((noinline))
#define NORETURN __attribute__((noreturn))
#endif
int crash(int x) NOINLINE;
int oh_what(int x) NOINLINE;
int a_tangled_web(int x) NOINLINE;
int we_weave(int x) NOINLINE;
static void abort_handler(int s) NORETURN;
int
crash(int x)
{
if (crashtype == 0) {
*(volatile int *)0 = 0;
} else if (crashtype == 1) {
tor_assert(1 == 0);
} else if (crashtype == -1) {
;
}
crashtype *= x;
return crashtype;
}
int
oh_what(int x)
{
/* We call crash() twice here, so that the compiler won't try to do a
* tail-call optimization. Only the first call will actually happen, but
* telling the compiler to maybe do the second call will prevent it from
* replacing the first call with a jump. */
return crash(x) + crash(x*2);
}
int
a_tangled_web(int x)
{
return oh_what(x) * 99 + oh_what(x);
}
int
we_weave(int x)
{
return a_tangled_web(x) + a_tangled_web(x+1);
}
static void
abort_handler(int s)
{
(void)s;
exit(0);
}
int
main(int argc, char **argv)
{
log_severity_list_t severity;
if (argc < 2) {
puts("I take an argument. It should be \"assert\" or \"crash\" or "
"\"none\"");
return 1;
}
if (!strcmp(argv[1], "assert")) {
crashtype = 1;
} else if (!strcmp(argv[1], "crash")) {
crashtype = 0;
} else if (!strcmp(argv[1], "none")) {
crashtype = -1;
} else {
puts("Argument should be \"assert\" or \"crash\" or \"none\"");
return 1;
}
init_logging();
set_log_severity_config(LOG_WARN, LOG_ERR, &severity);
add_stream_log(&severity, "stdout", STDOUT_FILENO);
tor_log_update_sigsafe_err_fds();
configure_backtrace_handler(NULL);
signal(SIGABRT, abort_handler);
printf("%d\n", we_weave(2));
clean_up_backtrace_handler();
return 0;
}
......@@ -96,6 +96,8 @@ test_sigsafe_err(void *arg)
close(STDERR_FILENO);
log_err(LD_BUG, "Say, this isn't too cool.");
tor_log_err_sigsafe("Minimal.\n", NULL);
set_log_time_granularity(100*1000);
tor_log_err_sigsafe("Testing any ",
"attempt to manually log ",
"from a signal.\n",
......
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