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charset="utf-8" Content-Transfer-Encoding: quoted-printable Hello, My application using musl libc runs into a seg fault if I call pthread_deta= ch after pthread_join on the same thread. From my understanding pthread_det= ach should return ESRCH if a previous join was called on a particular threa= d. That=E2=80=99s the correct behavior I see if I run my program with glibc= . But on my LEDE based router I run into the seg fault issue. The cross compiling toolchain I use is arm_cortex-a9+neon_gcc-5.4.0_musl-1.= 1.16_eabi. Simple example I used for testing is below. #include #include #include #include void *print_message_function( void *ptr ); int main() { pthread_t thread1, thread2; const char *message1 =3D "Thread 1"; const char *message2 =3D "Thread 2"; int iret1, iret2; int dret1, dret2; iret1 =3D pthread_create( &thread1, NULL, &print_message_function, (vo= id*) message1); if(iret1) { fprintf(stderr,"Error - pthread_create() return code: %d\n",iret1)= ; exit(EXIT_FAILURE); } iret2 =3D pthread_create( &thread2, NULL, &print_message_function, (vo= id*) message2); if(iret2) { fprintf(stderr,"Error - pthread_create() return code: %d\n",iret2)= ; exit(EXIT_FAILURE); } printf("pthread_create() for thread 1 returns: %d\n",iret1); printf("pthread_create() for thread 2 returns: %d\n",iret2); pthread_join( thread1, NULL); pthread_join( thread2, NULL); dret1 =3D pthread_detach(thread1); if (dret1 =3D=3D EINVAL) { printf("got EINVAL when detaching 1\n"); } if (dret1 =3D=3D ESRCH) { printf("got ESRCH when detaching 1\n"); } dret2 =3D pthread_detach(thread2); if (dret2 =3D=3D EINVAL) { printf("got EINVAL when detaching 2\n"); } if (dret2 =3D=3D ESRCH) { printf("got ESRCH when detaching 2\n"); } return 0; } void *print_message_function( void *ptr ) { char *message; message =3D (char *) ptr; printf("%s \n", message); } Output gotten pthread_create() for thread 1 returns: 0 Thread 1 pthread_create() for thread 2 returns: 0 Thread 2 Segmentation fault (core dumped) Regards Salman ________________________________ Kommanditgesellschaft - Sitz: Detmold - Amtsgericht Lemgo HRA 2790 - Komplement=C3=A4rin: Weidm=C3=BCller Interface F=C3=BChrungsgesellschaft mb= H - Sitz: Detmold - Amtsgericht Lemgo HRB 3924; Gesch=C3=A4ftsf=C3=BChrer: Jos=C3=A9 Carlos =C3=81lvarez Tobar, Elke Eckste= in, J=C3=B6rg Timmermann; USt-ID-Nr. DE124599660 --_000_E9B8FCA610BB6249B7C397BE4A01AE19412212SRVDE355weidmuell_ Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Hello,

 

My application using musl libc = runs into a seg fault if I call pthread_detach after pthread_join on the sa= me thread. From my understanding pthread_detach should return ESRCH if a pr= evious join was called on a particular thread. That=E2=80=99s the correct behavior I see if I run my program with= glibc. But on my LEDE based router I run into the seg fault issue.

The cross compiling toolchain I= use is arm_cortex-a9+neon_gcc-5.4.0_musl-1.1.16_eabi. Simple example I= used for testing is below.

 

#include <stdio.h><= /o:p>

#include <errno.h><= /o:p>

#include <stdlib.h>=

#include <pthread.h>

 

void *print_message_function( = void *ptr );

 

int main()

{

     pthre= ad_t thread1, thread2;

     const= char *message1 =3D "Thread 1";

     const= char *message2 =3D "Thread 2";

     int&n= bsp; iret1, iret2;

     int d= ret1, dret2;

 

     iret1= =3D pthread_create( &thread1, NULL, &print_message_function, (void= *) message1);

     if(ir= et1)

     {

     =     fprintf(stderr,"Error - pthread_create() return cod= e: %d\n",iret1);

     =     exit(EXIT_FAILURE);

     }

 

     iret2= =3D pthread_create( &thread2, NULL, &print_message_function, (void= *) message2);

     if(ir= et2)

     {

     =     fprintf(stderr,"Error - pthread_create() return cod= e: %d\n",iret2);

     =     exit(EXIT_FAILURE);

     }

 

     print= f("pthread_create() for thread 1 returns: %d\n",iret1);

     print= f("pthread_create() for thread 2 returns: %d\n",iret2);

 

     pthre= ad_join( thread1, NULL);

     pthre= ad_join( thread2, NULL);

     =

     = dret1 =3D  pthread_detach(thread1);

     if (d= ret1 =3D=3D EINVAL) {

     =      printf("got EINVAL when detaching 1\n");=

     }

     if (d= ret1 =3D=3D  ESRCH) {

     =      printf("got ESRCH when detaching 1\n");<= o:p>

     }

     dret2= =3D pthread_detach(thread2);

     if (d= ret2 =3D=3D EINVAL) {

     =      printf("got EINVAL when detaching 2\n");=

     }

     if (d= ret2 =3D=3D  ESRCH) {

     =      printf("got ESRCH when detaching 2\n");<= o:p>

     }

 

     retur= n 0;

}

 

void *print_message_function( = void *ptr )

{

     char *message;<= /o:p>

     message =3D (char *)= ptr;

     printf("%s \n&q= uot;, message);

}

 

Output gotten

pthread_create() for thread 1 r= eturns: 0

Thread 1

pthread_create() for thread 2 r= eturns: 0

Thread 2

Segmentation fault (core dumped= )

 

Regards

Salman

Kommanditgesellschaft - Sitz: Detmold - Amtsgericht Lemgo HRA 2790 -
Komplement=C3=A4rin: Weidm=C3=BCller Interface F=C3=BChrungsgesellschaft mb= H -
Sitz: Detmold - Amtsgericht Lemgo HRB 3924;
Gesch=C3=A4ftsf=C3=BChrer: Jos=C3=A9 Carlos =C3=81lvarez Tobar, Elke Eckste= in, J=C3=B6rg Timmermann;
USt-ID-Nr. DE124599660
--_000_E9B8FCA610BB6249B7C397BE4A01AE19412212SRVDE355weidmuell_--