Date: Mon, 29 Jan 2001 08:50:41 -0800 (PST) From: dor@cwnt.com To: freebsd-gnats-submit@FreeBSD.org Subject: bin/24721: libgcc_r problem - library precedence with libstdc++ Message-ID: <200101291650.f0TGofU88365@freefall.freebsd.org>
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>Number: 24721
>Category: bin
>Synopsis: libgcc_r problem - library precedence with libstdc++
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jan 29 09:00:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Dor Laor
>Release: 4.2-release
>Organization:
Charlotte WEB
>Environment:
FreeBSD simba.cwnt.co.il 4.2-RELEASE FreeBSD 4.2-RELEASE #2: Wed Jan 17 16:22:29 GMT 2001 barak@simba.cwnt.co.il:/usr/src/sys/compile/COMPAQ_DL360 i386
>Description:
The attached program creates cores using normal compilation & linking .
The compilation command is:
g++ -g3 try.cpp -pthread -o try
// file try.cpp
#include <sys/types.h>
#include <strstream.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <pthread.h>
class a {
public:
a() {
a1 = 0;
}
~a() {
int i;
int a2[100];
for (i = 0; i < 100 ; i++) {
a2[i] = i;
}
a1 = a2[0];
}
int a1;
};
class b : a {
int b1;
};
void func(void* arg) {
int i;
for (i=0;i<100000;i++) {
b obj;
b* p;
p = &obj;
}
printf("thread done\n");
}
void thread_creation(int i) {
int rtn = 0;
pthread_t id;
if (rtn = pthread_create(&id, 0, (void * (*)(void *))func,NULL)) {
printf(" could create thread\n");
}
}
int main() {
for (int i=0; i< 100; i++) {
thread_creation(i);
}
sleep(10);
return 0;
}
>How-To-Repeat:
Just run the program several times.
>Fix:
Link libgcc_r implictly with the executable- use command
g++ -g3 try.cpp -pthread -lgcc_r -o try
Note that if you put libstdc++ before gcc_r the problem remains
>Release-Note:
>Audit-Trail:
>Unformatted:
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