https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88742
Bug ID: 88742
Summary: Debugger jumps back when stepping over class
destructor
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: ks1322 at gmail dot com
Target Milestone: ---
This is basically the same bug report as the Bug 49951 because it can be
reproduced with recent version of gcc.
I don't know whether Bug 49951 should be reopened or not, so I am reporting the
new one.
In short, when stepping to destructor code in debugger, it jumps back to the
declaration of the class.
The code:
#include <stdio.h>
class MyClass
{
public:
MyClass() {}; // constructor
~MyClass() {}; // destructor
};
int main ()
{
int i = 1;
MyClass m;
if (i == 1)
{
printf ("Hello world %d\n", i);
}
}
Compiling:
g++ -Wall -Wextra -g -O0 t03.cpp
Debugging:
$ gdb -q a.out
Reading symbols from a.out...done.
(gdb) start
Temporary breakpoint 1 at 0x40114f: file t03.cpp, line 13.
Starting program: /tmp/a.out
Missing separate debuginfos, use: dnf debuginfo-install
glibc-2.28-23.fc29.x86_64
Temporary breakpoint 1, main () at t03.cpp:13
13 int i = 1;
Missing separate debuginfos, use: dnf debuginfo-install
libgcc-8.2.1-5.fc29.x86_64 libstdc++-8.2.1-5.fc29.x86_64
(gdb) n
14 MyClass m;
(gdb)
16 if (i == 1)
(gdb)
18 printf ("Hello world %d\n", i);
(gdb)
Hello world 1
14 MyClass m;
(gdb)
20 }
Note the jump back to line 14 before continuing to line 20.
I don't observe this behavior with clang, no jumps back in debugger (clang
version 7.0.0).
