Does the memory leak check not work?

[Nic McPhee]

I'm new to Cmockery, and it's likely to prove very useful for me. I
was disappointed, though, to find that apparently the memory leak
check doesn't work. When I comment out all the free calls in the code
I'm testing, all the tests still pass, and when I run the
allocate_module example with just the memory leak test it also passes.

Is this a known problem? Do I need to do something to enable that
functionality?

Many thanks in advance,

Nic

[Alexander Demin]

Nic,

Can you show the source of your example?

Regards,
Alexander

[Nic McPhee]

I downloaded the files allocate_module.c and allocate_module_test.c
from the manual (http://cmockery.googlecode.com/svn/trunk/doc/
index.html#Dynamic_Memory_Allocation), and commented out the second
and third test in the main method of the test file:

int main(int argc, char* argv[]) {
const UnitTest tests[] = {
unit_test(leak_memory_test) // ,
/*
unit_test(buffer_overflow_test),
unit_test(buffer_underflow_test), */
};
return run_tests(tests);
}

My reading of the documentation indicates that this should fail, but
it passes quite happily.

Thoughts?

Nic

[Stewart Miles]

Running allocate_module.c on windows....

C:\src-cmockery\cmockery\windows>allocate_module_test.exe
leak_memory_test: Starting test
Blocks allocated...
0x00032c18 : ..\src\example\allocate_module.c:36
ERROR: leak_memory_test leaked 1 block(s)
leak_memory_test: Test failed.
buffer_overflow_test: Starting test
Guard block of 0x00032c50 size=4 allocated by
..\src\example\allocate_module.c:41 at 0x00032c54 is corrupt
ERROR: ..\src\example\allocate_module.c:43 Failure!
buffer_overflow_test: Test failed.
buffer_underflow_test: Starting test
Guard block of 0x00032ca8 size=4 allocated by
..\src\example\allocate_module.c:47 at 0x00032ca7 is corrupt
ERROR: ..\src\example\allocate_module.c:49 Failure!
buffer_underflow_test: Test failed.
3 out of 3 tests failed!
leak_memory_test
buffer_overflow_test
buffer_underflow_test
Blocks allocated...
0x00032c18 : ..\src\example\allocate_module.c:41
0x00032c70 : ..\src\example\allocate_module.c:47
Guard block of 0x00032c50 size=4 allocated by
..\src\example\allocate_module.c:41 at 0x00032c54 is corrupt
ERROR: ..\src\cmockery.c:1463 Failure!


On Linux....

cmockery2$./allocate_module_test
leak_memory_test: Starting test
Blocks allocated...
0x00601150 : src/example/allocate_module.c:36
ERROR: leak_memory_test leaked 1 block(s)
leak_memory_test: Test failed.
buffer_overflow_test: Starting test
Guard block of 0x006011b0 size=4 allocated by
src/example/allocate_module.c:41 at 0x006011b4 is corrupt
ERROR: src/example/allocate_module.c:43 Failure!
buffer_overflow_test: Test failed.
buffer_underflow_test: Starting test
Guard block of 0x00601230 size=4 allocated by
src/example/allocate_module.c:47 at 0x0060122f is corrupt
ERROR: src/example/allocate_module.c:49 Failure!
buffer_underflow_test: Test failed.
3 out of 3 tests failed!
leak_memory_test
buffer_overflow_test
buffer_underflow_test
Blocks allocated...
0x00601150 : src/example/allocate_module.c:41
0x006011d0 : src/example/allocate_module.c:47
Guard block of 0x006011b0 size=4 allocated by
src/example/allocate_module.c:41 at 0x006011b4 is corrupt
ERROR: src/cmockery.c:1463 Failure!

The leak_memory_test fails in both my test cases. Could you give the
exact steps you're using to build cmockery, the platform and your test
output?

Thanks,
Stewart