https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90964
Bug ID: 90964
Summary: SJLJ: Backtrace stopped: previous frame inner to this
frame (corrupt stack?)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ocroquette at free dot fr
Target Milestone: ---
On Windows with the SJLJ exception handling, the backtrace doesn't work in GDB
as soon a method enters a try/catch block, instead GDB reports:
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
The problem can be easily reproduced with any SJLJ Mingw-w64 toolchain.
The problem doesn't occur with SEH exception handling.
It is not clear if the problem is in GCC, GDB or MinGW-w64. I don't know how to
find out, hopefully someone competent can tell if it is a GCC bug or not.
main.cpp:
#include <stdexcept>
void
dummy()
{
volatile int i = 0;
}
bool
expectTrue( bool value )
{
dummy();
if ( !static_cast<bool>( value ) )
{
throw std::runtime_error("value failed");
}
dummy();
return value;
}
int
main( int argc, char** argv )
{
dummy();
expectTrue( true );
dummy();
}
gcc --version
gcc (x86_64-posix-sjlj-rev0, Built by MinGW-W64 project) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
g++ -g -O0 main.cpp -o main
gdb ./main
GNU gdb (GDB) 8.0.1
...
(gdb) break dummy
Breakpoint 1 at 0x401578: file main.cpp, line 7.
(gdb) run
...
Thread 1 hit Breakpoint 1, dummy () at main.cpp:7
7 volatile int i = 0;
(gdb) backtrace
#0 dummy () at main.cpp:7
#1 0x0000000000401728 in main (argc=1, argv=0x25d1d20) at main.cpp:28
(gdb) continue
Continuing.
Thread 1 hit Breakpoint 1, dummy () at main.cpp:7
7 volatile int i = 0;
(gdb) backtrace
#0 dummy () at main.cpp:7
#1 0x0000000000401626 in expectTrue (value=true) at main.cpp:13
#2 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) continue
Continuing.
Thread 1 hit Breakpoint 1, dummy () at main.cpp:7
7 volatile int i = 0;
(gdb) backtrace
#0 dummy () at main.cpp:7
#1 0x000000000040167b in expectTrue (value=true) at main.cpp:20
#2 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) continue
Continuing.
Thread 1 hit Breakpoint 1, dummy () at main.cpp:7
7 volatile int i = 0;
(gdb) backtrace
#0 dummy () at main.cpp:7
#1 0x0000000000401737 in main (argc=1, argv=0x25d1d20) at main.cpp:30
(gdb) continue
Continuing.
[Thread 5844.0x1750 exited with code 0]
[Thread 5844.0x1320 exited with code 0]
[Thread 5844.0x2334 exited with code 0]
[Inferior 1 (process 5844) exited normally]
(gdb)
