On Sat, 2021-07-10 at 17:14 +0000, Mahmood Naderan via Gcc-help wrote:
> OK. I tried to do some more tricks and got new signs of crash.
> I edited the Makefile in the folder that trace_driven.cc is compiled
> and instead of using -O3, I used -O1 and now I get
>
>
> free(): double free detected in tcache 2
It indicates a bug in your code (in 99.99% chance).
Even if you paid money for a commercial compiler, its supporting team
wouldn't help you to debug your code.
> std::vector<std::vector<inst_trace_t> *> threadblock_traces;
> for (unsigned i = start_warp; i < end_warp; ++i) {
> trace_shd_warp_t *m_trace_warp = static_cast<trace_shd_warp_t
> *>(m_warp[i]);
> m_trace_warp->clear();
> threadblock_traces.push_back(&(m_trace_warp->warp_traces));
> }
> trace_kernel_info_t &trace_kernel =
> static_cast<trace_kernel_info_t &>(kernel);
> printf("hello %d\n",threadblock_traces.size());
> trace_kernel.get_next_threadblock_traces(threadblock_traces);
There is no way to determine if this snippnet is correct, as its
behavior depends on what "m_trace_wrap" is, what "clear" does, etc.
And you are still using %d for size_t, which is an undefined behavior.
It seems you don't know what undefined behavior is, so it's very likely
there are more cases of undefined behavior in your code.
--
Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University
