* problem with '-pg' switch..
@ 2006-04-18 15:23 jim marshall
2006-04-19 19:31 ` dch
0 siblings, 1 reply; 2+ messages in thread
From: jim marshall @ 2006-04-18 15:23 UTC (permalink / raw)
To: gcc-help
Hello,
I am having a problem when using the -pg compile switch with my
application, and was hoping someone might be able to assist somehow. I
have a fairly large application which compiles and runs fine, I wanted
to do some profiling on it so I added the "-pg" compile switch to my
release build. Now when I start the application it gets a "segmentation
fault" when it is starting. Looking in the debugger it is failing in a
function which is basically a no-op in our release build - all it does
is "return;".
The program consists of a fairly generic executable, this executable
calls into a shared object (implicitly) which starts the real
processing. This shared object implicitly and dynamically links to other
shared objects. However; it seems to crash before it gets to any other
shared objects. The main executable calls the stub function in the
primary shared object and the process seg faults.
Here is some information about my environment
gcc (GCC) 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
Copyright (C) 2002 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.
Red Hat 9.0 (no patches)
Linux wbempc 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003 i686 i686 i386
GNU/Linux
compile options for main executable
cc -D_LINUX -Wall -D__USE_ISOC99 -D__USE_POSIX -D_COMPILE_UNIX -z defs
-pg -O2 -D_UNICODE -DUNICODE -lourlib
compile options for shared object (ourlib):
cc -Wall -D_LINUX -fpic -pg -O2 -shared -D_COMPILE_UNIX -D__USE_ISOC99
-D__USE_POSIX -D_UNICODE -DUNICODE -D_REENTRANT -z defs
Thanks in advance
Jim Marshall
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: problem with '-pg' switch..
2006-04-18 15:23 problem with '-pg' switch jim marshall
@ 2006-04-19 19:31 ` dch
0 siblings, 0 replies; 2+ messages in thread
From: dch @ 2006-04-19 19:31 UTC (permalink / raw)
To: jim marshall; +Cc: gcc-help
Hi Jim,
Sounds a bit odd - have you tried doing something in this no-op
function. e.g.
void noop() {
int a;
a = 1;
a++;
return
}
And see if that makes a difference? Perhaps the problem is elsewhere
but shows up here. Also GCC 3.2.2 is very old now - you're basically
four or five major releases behind - 3.3, 3.4, 4.0 and 4.1 I'd give
3.4.x or 4.1.x a go.
Cheers,
David.
jim marshall wrote:
> Hello,
> I am having a problem when using the -pg compile switch with my
> application, and was hoping someone might be able to assist somehow. I
> have a fairly large application which compiles and runs fine, I wanted
> to do some profiling on it so I added the "-pg" compile switch to my
> release build. Now when I start the application it gets a
> "segmentation fault" when it is starting. Looking in the debugger it
> is failing in a function which is basically a no-op in our release
> build - all it does is "return;".
>
> The program consists of a fairly generic executable, this executable
> calls into a shared object (implicitly) which starts the real
> processing. This shared object implicitly and dynamically links to
> other shared objects. However; it seems to crash before it gets to any
> other shared objects. The main executable calls the stub function in
> the primary shared object and the process seg faults.
>
> Here is some information about my environment
>
> gcc (GCC) 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
> Copyright (C) 2002 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.
>
> Red Hat 9.0 (no patches)
> Linux wbempc 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003 i686 i686 i386
> GNU/Linux
>
> compile options for main executable
> cc -D_LINUX -Wall -D__USE_ISOC99 -D__USE_POSIX -D_COMPILE_UNIX -z defs
> -pg -O2 -D_UNICODE -DUNICODE -lourlib
>
> compile options for shared object (ourlib):
> cc -Wall -D_LINUX -fpic -pg -O2 -shared -D_COMPILE_UNIX -D__USE_ISOC99
> -D__USE_POSIX -D_UNICODE -DUNICODE -D_REENTRANT -z defs
>
> Thanks in advance
> Jim Marshall
>
>
>
>
>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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