[Bug gcov-profile/31624] New: gprof names are mangled under 64 bit compilation

[Bug gcov-profile/31624] New: gprof names are mangled under 64 bit compilation

[vkywong at ca dot ibm dot com]

Problem description
===================
Function names are mangled in gprof output. Such name mangling in gprof
output only occurs when compiling with g++ under 64 bit modes

Compiler output
===============
The name HelloWorld is mangled.

Flat profile:

Each sample counts as 0.01 seconds.
 no time accumulated

  %   cumulative   self              self     total
 time   seconds   seconds    calls  Ts/call  Ts/call  name
  0.00      0.00     0.00        7     0.00     0.00  ._Z10HelloWorldv
  0.00      0.00     0.00        1     0.00     0.00  .__gmon_start__
^L                        Call graph


granularity: each sample hit covers 4 byte(s) no time propagated

index % time    self  children    called     name
                0.00    0.00       7/7           .main [9]
[1]      0.0    0.00    0.00       7         ._Z10HelloWorldv [1]
-----------------------------------------------
                                   1             .__gmon_start__ [2]
                0.00    0.00       1/1           .atexit [8]
[2]      0.0    0.00    0.00       1+1       .__gmon_start__ [2]
                                   1             .__gmon_start__ [2]
-----------------------------------------------
^L
Index by function name

   [1] ._Z10HelloWorldv        [2] .__gmon_start__Expected output
===============

Flat profile:

Each sample counts as 0.01 seconds.
 no time accumulated

  %   cumulative   self              self     total
 time   seconds   seconds    calls  Ts/call  Ts/call  name
  0.00      0.00     0.00        7     0.00     0.00  HelloWorld()
  0.00      0.00     0.00        1     0.00     0.00  global constructors keyed
to _Z10HelloWorldv
  0.00      0.00     0.00        1     0.00     0.00 
__static_initialization_and_destruction_0(int, int)
^L


                        Call graph


granularity: each sample hit covers 4 byte(s) no time propagated

index % time    self  children    called     name
                0.00    0.00       7/7           main [10]
[11]     0.0    0.00    0.00       7         HelloWorld() [11]
-----------------------------------------------
                0.00    0.00       1/1           __do_global_ctors_aux [14]
[12]     0.0    0.00    0.00       1         global constructors keyed to
_Z10HelloWorldv [12]
                0.00    0.00       1/1          
__static_initialization_and_destruction_0(int, int) [13]
-----------------------------------------------
                0.00    0.00       1/1           global constructors keyed to
_Z10HelloWorldv [12]
[13]     0.0    0.00    0.00       1        
__static_initialization_and_destruction_0(int, int) [13]
-----------------------------------------------
^L
Index by function name

  [12] global constructors keyed to _Z10HelloWorldv [11] HelloWorld() [13]
__static_initialization_and_destruction_0(int, int)


Steps to reproduce the problem
==============================
#
/usr/bin/g++ -m64 -pg -o hello hello.C >STEP1.out 2>&1
#
./hello >hello.out 2>STEP2.out
#
/usr/bin/gprof -b hello gmon.out >gprof.out 2>STEP6.out

/* Listing of hello.C */
#include <stream.h>

void HelloWorld()
{
        cout << "Hello, World\n";
}
int main()
{
        for(int i=0; i<7; i++)
                HelloWorld();
        return(0);
}


-- 
           Summary: gprof names are mangled under 64 bit compilation
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: vkywong at ca dot ibm dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31624

[Bug gcov-profile/31624] gprof names are mangled under 64 bit compilation

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-04-18 20:04 -------
gprof is not part of GCC, it is part of binutils.

The problem is that gprof is not stripping out the dot part of the symbol.

Report this to the binutils folks.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31624