backtrace/1574: Stack is not entirely shown (gdb 6.0 C C++ backtrace limit)

[cyrille dot benard at elios-informatique dot fr]

>Number:         1574
>Category:       backtrace
>Synopsis:       Stack is not entirely shown (gdb 6.0 C C++ backtrace limit)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Feb 26 13:58:00 UTC 2004
>Closed-Date:
>Last-Modified:
>Originator:     Cyrille Bénard
>Release:        GNU gdb 6.0
>Organization:
>Environment:
1) SunOS xxxxxx 5.8 Generic_108528-27 sun4u sparc.
2) The GCC used to compile the application I want to debug is version 3.3.2. The GCC version used to compile GDB 6.0 is version 3.1.
3) This GDB was configured as "sparc-sun-solaris2.8"
>Description:
When I set a breakpoint in the f6() function (see the file attachment) if I ask GDB for showing the stack (backtrace),
the stack is not entirely shown. Only 3 frames are displayed :

**********
#0  f6() () at toto.cc:40
#1  0x00010c80 in f5() () at toto.cc:35
#2  0x00010c68 in f4() () at toto.cc:30
**********


When I ask GDB for informations about the backtrace limit it tells me there is no limit (great ^^ ) :

**********
(gdb) show backtrace limit
The upper bound on the number of backtrace levels is unlimited.
**********



When I set this limit to 8 (trying to investigate) and then asked for backtrace, it tells me that the limit exceeded... really ??? which way did you follow GDB ?? ;^) :

**********
Backtrace limit of 8 exceeded
Backtrace limit of 8 exceeded

Breakpoint 1, f6() () at toto.cc:40
40		cout << "In f6 function" << endl ;
(gdb) bt
#0  f6() () at toto.cc:40
Backtrace limit of 8 exceeded
(gdb) 
**********
>How-To-Repeat:
compile the attached file :
g++ -Wall -g toto.cc

Load the generated file in gdb 6.0 (file a.out by default) :
gdb a.out

set a breakpoint in f6 function :
br f6

Start the application :
run

When the debugger stop, call the backtrace :
bt
>Fix:
unfortunatly I don't know :(
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="toto.cc"
Content-Disposition: inline; filename="toto.cc"

#include <iostream>

using namespace std ;

void f1(void) ;
void f2(void) ;
void f3(void) ;
void f4(void) ;
void f5(void) ;
void f6(void) ;


void f1(void)
{
	f2() ;
}

void f2(void)
{
	f3() ;
}

void f3(void)
{
	f4() ;
}

void f4(void)
{
	f5() ;
}

void f5(void)
{
	f6() ;
}

void f6(void)
{
	cout << "In f6 function" << endl ;
}

int main(void)
{

	f1() ;

	return( 0 ) ;
}