I had the exact same issue with MSYS2's i686 mingw gdb today, except I was
debugging a complicated program that I had cross-compiled from Linux. I
was unable to reproduce the issue with a simple program.
--David
On Fri, Feb 17, 2017 at 5:45 PM, goldenhawk...@163.com <
goldenhawk...@163.com> wrote:
>
> Dear developer:
> Yesterday, I upgraded MSYS2 to the latest version. When I
> debug a 32 bit Qt project, the debugger ends when the
> first breakpoint is hit by an unknown signal.
> This is also true in non Qt projects, even if it is an
> empty HelloWorld C++ program that will crash before the
> first breakpoint triggers.
> Environmental Science：
> Operating system: Windows 7 X64
> MSYS2:MSYS2 x64 Edition
> Upgrade date: North America time February 16, 2017
> GCC version: gcc.exe (Rev1, Built by MSYS2 project) 6.3.0
> GDB version: GNU GDB (GDB) 7.12.1
> ENV: No anti-virus software is installed.
> Test project see annex.
> 1. x64 gdb is OK:
> commands in shell started by mingw64.exe:
> $g++ -g test.cpp -o test.exe
> $gdb ./test.exe
> (gdb) b add(int,int)
> Breakpoint 1 at 0x4015be: file ./test.cpp, line 4.
> (gdb) r
> Starting program: C:\msys64\home\gougoumimi\dbgtest\test.exe
> [New Thread 5692.0x1eb4]
> Hello World!
>
> Breakpoint 1, add (a=12, b=13) at ./test.cpp:4
> 4 int c = a + b;
> (gdb) list
> 1 #include <iostream>
> 2 int add (int a, int b)
> 3 {
> 4 int c = a + b;
> 5 return c;
> 6 }
> 7 int main(int argc, char * argv[])
> 8 {
> 9 std::cout<<"Hello World!"<<std::endl;
> 10 std::cout<<add(12,13)<<std::endl;
> (gdb) c
> Continuing.
> 25
> Break point passed.
> [Inferior 1 (process 5692) exited normally]
>
>
> 2. x86 is NOT OK
> commands in shell started by mingw32.exe:
> $g++ -g test.cpp -o test.exe
> $gdb ./test.exe
> (gdb) b add(int,int)
> Breakpoint 1 at 0x401636: file ./test.cpp, line 4.
> (gdb) r
> Starting program: C:\msys64\home\gougoumimi\dbgtest\test.exe
> [New Thread 5584.0xeec]
> Hello World!
>
> This application has requested the Runtime to terminate it in an
> unusual way.
> Please contact the application's support team for more
> information.
>
> Breakpoint 1, add (
>
> 3. For examples above, it seems that, x86 edition gdb has some problems
> in stdout display .
>
> 4. There was a same problem in qtcreator IDE
>
> Thanks a lot!
> ------------------------------
> goldenhawk...@163.com
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