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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2020-01-13 20:05:08 +0000
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2020-02-09 13:56:48 +0100
commit0c0361235ca7d4f5be0f88fe9b03afcf6a3cb8c6 (patch)
tree1a891e5c28f899d5490a7068b36d17f0515e023a /htl
parent95669bbf2c20518cbbcd31681e2dc954c5233b79 (diff)
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htl: Add support for C11 threads behavior
Essentially properly calling the thread function which returns an int instead of a void*. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'htl')
-rw-r--r--htl/pt-create.c20
-rw-r--r--htl/pt-internal.h3
2 files changed, 22 insertions, 1 deletions
diff --git a/htl/pt-create.c b/htl/pt-create.c
index 0b3237f46a..090d394f53 100644
--- a/htl/pt-create.c
+++ b/htl/pt-create.c
@@ -59,7 +59,17 @@ entry_point (struct __pthread *self, void *(*start_routine) (void *), void *arg)
__pthread_startup ();
- __pthread_exit (start_routine (arg));
+ if (self->c11)
+ {
+ /* The function pointer of the c11 thread start is cast to an incorrect
+ type on __pthread_create call, however it is casted back to correct
+ one so the call behavior is well-defined (it is assumed that pointers
+ to void are able to represent all values of int). */
+ int (*start)(void*) = (int (*) (void*)) start_routine;
+ __pthread_exit ((void*) (uintptr_t) start (arg));
+ }
+ else
+ __pthread_exit (start_routine (arg));
}
/* Create a thread with attributes given by ATTR, executing
@@ -99,6 +109,14 @@ __pthread_create_internal (struct __pthread **thread,
if (err)
goto failed;
+ if (attr == ATTR_C11_THREAD)
+ {
+ attr = NULL;
+ pthread->c11 = true;
+ }
+ else
+ pthread->c11 = false;
+
/* Use the default attributes if ATTR is NULL. */
setup = attr ? attr : &__pthread_default_attr;
diff --git a/htl/pt-internal.h b/htl/pt-internal.h
index 274223cfe1..9147b87740 100644
--- a/htl/pt-internal.h
+++ b/htl/pt-internal.h
@@ -100,6 +100,9 @@ struct __pthread
/* Resolver state. */
struct __res_state res_state;
+ /* Indicates whether is a C11 thread created by thrd_creat. */
+ bool c11;
+
/* Thread context. */
struct pthread_mcontext mcontext;