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From: | Sheheryar Parvaz |
Subject: | bug#30261: segfault on simultaneous initialization |
Date: | Fri, 26 Jan 2018 17:24:11 +0000 |
If the initial call to scm_with_guile is on a thread and in the main
thread at the same time, a segmentation fault occurs.
#include <pthread.h>
#include <libguile.h>
void* hello_world(void *arg) {
scm_c_eval_string("(display \"Hello World!\")");
scm_c_eval_string("(newline)");
}
void run_guile() {
scm_with_guile(&hello_world, NULL);
}
int main(int argc, char **argv) {
pthread_t th;
int ret = pthread_create(&th, NULL, &run_guile, NULL);
run_guile();
pthread_join(&th, NULL);
return 0;
}
Here is a backtrace of the issue.
#0 0x00007ffff7afd976 in scm_set_current_dynamic_state () from /usr/lib/libguile-2.2.so.1
#1 0x00007ffff7b5faec in guilify_self_2 () from /usr/lib/libguile-2.2.so.1
#2 0x00007ffff7b604b4 in scm_i_init_thread_for_guile () from /usr/lib/libguile-2.2.so.1
#3 0x00007ffff7b604f9 in with_guile () from /usr/lib/libguile-2.2.so.1
#4 0x00007ffff7281312 in GC_call_with_stack_base () from /usr/lib/libgc.so.1
#5 0x00007ffff7b60918 in scm_with_guile () from /usr/lib/libguile-2.2.so.1
#6 0x00000000004007a3 in run_guile ()
#7 0x00007ffff7893568 in start_thread (arg=0x7ffff5ea8700) at pthread_create.c:465
#8 0x00007ffff75cb52f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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