path: root/src/process
diff options
authorRich Felker <>2011-04-20 21:41:45 -0400
committerRich Felker <>2011-04-20 21:41:45 -0400
commit870cc679771f776333953b2a990a107393d9d0fd (patch)
tree45b6de4ba1170de4654b23d62bd1c6a38220e112 /src/process
parentf9a6372a98cc4d1b70400b2e7238e1f9eae50558 (diff)
fix minor bugs due to incorrect threaded-predicate semantics
some functions that should have been testing whether pthread_self() had been called and initialized the thread pointer were instead testing whether pthread_create() had been called and actually made the program "threaded". while it's unlikely any mismatch would occur in real-world problems, this could have introduced subtle bugs. now, we store the address of the main thread's thread descriptor in the libc structure and use its presence as a flag that the thread register is initialized. note that after fork, the calling thread (not necessarily the original main thread) is the new main thread.
Diffstat (limited to 'src/process')
1 files changed, 2 insertions, 1 deletions
diff --git a/src/process/fork.c b/src/process/fork.c
index bcd47c97..a04e8929 100644
--- a/src/process/fork.c
+++ b/src/process/fork.c
@@ -8,10 +8,11 @@ pid_t fork(void)
pid_t ret;
if (libc.fork_handler) libc.fork_handler(-1);
ret = syscall(SYS_fork);
- if (libc.threaded && !ret) {
+ if (libc.main_thread && !ret) {
pthread_t self = __pthread_self();
self->tid = self->pid = syscall(SYS_getpid);
libc.threads_minus_1 = 0;
+ libc.main_thread = self;
if (libc.fork_handler) libc.fork_handler(!ret);
return ret;