Two weeks ago, I came across an interesting bug. The convert() function
below returns 0x80000001 when p points to 0x01,
0x00, 0x00, 0x80, but the expected return value is
0x00000001 instead.
int32_t convert(const uint8_t *restrict p) {
uint32_t x = ( p[0] +
256 * p[1] +
256 * 256 * p …Code coverage is a metric to show the code being untested. It can be considered as a hint to add more test cases. When we are writing C/C++, the most notable code coverage testing tool is gcov, which is a GCC built-in coverage testing tool. Besides, we can collect …
In this post, I would like to introduce the bugpoint command line tool. This is a automatic test case reduction tool which can help us generate minimal test case.
As a compiler developer, the first step to debug is to create a minimal test case which can still reproduce the …
