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

.gitignore

+2 −0
Changes for .gitignore: 2 added lines, 0 removed lines.
Original line number Diff line number Diff line
@@ -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

src/test/bt_test.py

0 → 100755
+42 −0
Changes for src/test/bt_test.py: 42 added lines, 0 removed lines.
Original line number Diff line number Diff line 
# 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"

src/test/include.am

+8 −0
Changes for src/test/include.am: 8 added lines, 0 removed lines.
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@@ -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)

src/test/test_bt_cl.c

0 → 100644
+110 −0
Changes for src/test/test_bt_cl.c: 110 added lines, 0 removed lines.
Original line number Diff line number Diff line 
/* 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;

}

src/test/test_logging.c

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Changes for src/test/test_logging.c: 2 added lines, 0 removed lines.
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@@ -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",