Segmentation fault : Calling Julia from Multi Threaded C Program

[ravismula]

Getting Segmentation Fault in jl_load function.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffde0e73700 (LWP 12246)]
jl_enter_handler (eh=eh@entry=0x7ffde0e72300) at /home/centos/buildbot/slave/package_tarball64/build/src/builtins.c:214
214	/home/centos/buildbot/slave/package_tarball64/build/src/builtins.c: No such file or directory.

Here is the part of C Code which calls Julia

#include "julia.h"
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int counter = 0;

void do_prediction(){
	printf("%d\n",counter);
	counter++;
	int i = 0;
		jl_value_t* mod = (jl_value_t*)jl_eval_string("MyModule");
		jl_function_t *func = jl_get_function((jl_module_t*)mod,"custom_compute");

		jl_value_t *ret = jl_call2(func, (jl_value_t*)1, (jl_value_t*)2);

		if (jl_exception_occurred())
			printf("%s \n", jl_typeof_str(jl_exception_occurred()));
		// jl_atexit_hook(0);
		cout << "Returned Value:" << jl_unbox_float64(ret) << endl;
		i++;
}

void* test2(){
	do_compute();
	sleep(10);
}

void* test1(void* p){
	test2();
	sleep(10);
}




int main(int argc, char *argv[]){
	jl_init(JULIA_INIT_DIR);
	jl_load("MyModule.jl");
	// test1(argv[1], argv[2]);
	int i;
	pthread_t p_test[10];

	for(i =0 ;i <10; i ++){
		/* create a second thread which executes inc_x(&x) */
		if(pthread_create(&p_test[i], NULL, test1, NULL)) {
			fprintf(stderr, "Error creating thread\n");
			return 1;

		}
	}

	for(i =0 ;i <10; i ++){
		/* wait for the second thread to finish */
		if(pthread_join(p_test[i], NULL)) {
			fprintf(stderr, "Error joining thread\n");
			return 2;
		}
	}
	return 1;
}

Without multi threading it works fine, but with multi threading it fails!

[yuyichao]

Dup of #17573. It's not supported now.