[Bug gdb/29921] New: GDB steps into printf() when including "cstdio"

[Bug gdb/29921] New: GDB steps into printf() when including "cstdio"

[abdulrahman.mahmoud75 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29921

            Bug ID: 29921
           Summary: GDB steps into printf() when including "cstdio"
           Product: gdb
           Version: 7.10
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: abdulrahman.mahmoud75 at gmail dot com
  Target Milestone: ---

I have noticed that gdb is now able to step into printf function when including
cstdio starting gdb-7.10.

Here is my small app:

#include <cstdio>

int main()
{
        printf("test\n");

        return 0;
}

when using GDB-7.10 to step in printf the normal behavior that it should stop
at the return line but instead it stops inside the printf function:

"printf (__format=0x409050 "test\n")
    at
e:/win64-assert/modeltech/gcc-7.4.0-mingw64vc16/x86_64-w64-mingw32/include/stdio.h:351
351       __builtin_va_list __local_argv; __builtin_va_start( __local_argv,
__format );" 


This behavior happens only on Windows.

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[Bug gdb/29921] GDB steps into printf() when including "cstdio"

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29921

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org

--- Comment #1 from Tom Tromey <tromey at sourceware dot org> ---
Probably this is not a gdb bug, but rather something to do with
mingw.  For example if printf is an inline function then this
could happen.  Can you check that?

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[Bug gdb/29921] GDB steps into printf() when including "cstdio"

[abdulrahman.mahmoud75 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29921

abdulrahman mahmoud <abdulrahman.mahmoud75 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #2 from abdulrahman mahmoud <abdulrahman.mahmoud75 at gmail dot com> ---
Checking further the mingw headers have a definition for the printf which call
mingw version of printf.

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