[Bug c/52747] New: No warning from toolchain with nested function and --noexecstack

[noloader at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52747

             Bug #: 52747
           Summary: No warning from toolchain with nested function and
                    --noexecstack
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: noloa...@gmail.com


According to GCC docs, nested functions and no-exec stacks are mutually
exclusive. Using both does not generate a warning.

$ gcc --version
gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
Copyright (C) 2011 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.

$ uname -a
Linux ubuntu-11-x64 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:48:51 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux

$ cat warn-test.c
// gcc -fPIE -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack -Wl,-z,noexecheap
warn-test.c -o warn-test.exe

#include <stdio.h>

int main(int argc, char* argv[])
{
  void foo()
  {
    printf("%d\n", argc);

    if(argv)
      printf("%p\n", argv);   
  }

  foo();

  return 0;
}

$ gcc -fPIE -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack -Wl,-z,noexecheap
warn-test.c -o warn-test.exe
/usr/bin/ld: warning: -z noexecheap ignored.

$ ./warn-test.exe