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
At the same like that I received segfault with -O3.
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff77de859 in __GI_abort () at abort.c:79
#2 0x00007ffff78493ee in __libc_message (action=action@entry=do_abort,
fmt=fmt@entry=0x7ffff7973285 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
#3 0x00007ffff785147c in malloc_printerr (
str=str@entry=0x7ffff79755d0 "free(): double free detected in tcache 2") at malloc.c:5347
#4 0x00007ffff78530ed in _int_free (av=0x7ffff79a4b80 <main_arena>, p=0x5555fdbbd7f0,
have_lock=0) at malloc.c:4201
#5 0x0000555555562a88 in __gnu_cxx::new_allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*>::deallocate (__p=<optimized out>, this=0x7fffffffc5a0)
at /usr/include/c++/9/ext/new_allocator.h:119
#6 std::allocator_traits<std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> >::deallocate (__n=<optimized out>, __p=<optimized out>, __a=...)
at /usr/include/c++/9/bits/alloc_traits.h:470
#7 std::_Vector_base<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> >::_M_deallocate (__n=<optimized out>,
__p=<optimized out>, this=0x7fffffffc5a0) at /usr/include/c++/9/bits/stl_vector.h:351
#8 std::_Vector_base<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> >::~_Vector_base (this=0x7fffffffc5a0,
__in_chrg=<optimized out>) at /usr/include/c++/9/bits/stl_vector.h:332
#9 std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> >::~vector (this=0x7fffffffc5a0,
__in_chrg=<optimized out>) at /usr/include/c++/9/bits/stl_vector.h:680
#10 trace_shader_core_ctx::init_traces (this=this@entry=0x55555696fb20, start_warp=0,
end_warp=end_warp@entry=4, kernel=...) at trace_driven.cc:487
The code looks like
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);
Any feedback is appreciated.
Regards,
Mahmood
On Friday, July 9, 2021, 9:57:26 AM GMT+2, Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx> wrote:
On Thu, 2021-07-08 at 16:42 +0000, Mahmood N via Gcc-help wrote:
> Hi
>
> I see that my program works fine in the debug mode, but not in the
> release mode. With GDB I was able to find the function that got error.
> The code looks like
>
>
>
> std::vector<std::vector<inst_trace_t> *> threadblock_traces;
> ...
> printf("hello %d\n",threadblock_traces.size());
At least you can't use "%d" to print the result of
std::vector<T>::size() (which is not an `int`).
> trace_kernel.get_next_threadblock_traces(threadblock_traces);
>
Try to find the bug of your code with warnings, sanitizers, or
-D_GLIBCXX_DEBUG.
--
Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University
