5476f8cd2e68 ("htl: move pthread_self info libc.") moved the htl
pthread_self() function from libpthread to libc, replacing the previous libc
stub that just returns 0. And 53da64d1cf36 ("htl: Initialize ___pthread_self
early") added initialization code which is needed before being able to
call pthread_self. It is currently in libpthread, and thus never called
before programs can call pthread_self from libc, which then segfaults
when accessing _pthread_self()->thread.
This moves the initialization to libc itself, as initialized variables, so
pthread_self can always be called fine.
---
htl/Versions | 1 +
sysdeps/mach/hurd/htl/pt-pthread_self.c | 9 ++++++++-
sysdeps/mach/hurd/htl/pt-sysdep.c | 12 ++----------
sysdeps/mach/hurd/htl/pt-sysdep.h | 2 ++
4 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/htl/Versions b/htl/Versions
index e1524117a0..69b79b4f1b 100644
--- a/htl/Versions
+++ b/htl/Versions
@@ -38,6 +38,7 @@ libc {
__pthread_cleanup_stack;
__pthread_total;
___pthread_self;
+ __pthread_init_thread;
}
}
diff --git a/sysdeps/mach/hurd/htl/pt-pthread_self.c
b/sysdeps/mach/hurd/htl/pt-pthread_self.c
index 04fa283aab..08ef2e4956 100644
--- a/sysdeps/mach/hurd/htl/pt-pthread_self.c
+++ b/sysdeps/mach/hurd/htl/pt-pthread_self.c
@@ -17,6 +17,13 @@
<https://www.gnu.org/licenses/>. */
#include <pt-sysdep.h>
+#include <pt-internal.h>
-__thread struct __pthread *___pthread_self;
+/* Initial thread structure used before libpthread is initialized, so various
+ * functions can already work at least basically. */
+struct __pthread __pthread_init_thread = {
+ .thread = 1,
+};
+
+__thread struct __pthread *___pthread_self = &__pthread_init_thread;
libc_hidden_tls_def (___pthread_self)
diff --git a/sysdeps/mach/hurd/htl/pt-sysdep.c
b/sysdeps/mach/hurd/htl/pt-sysdep.c
index 5372cbf77f..f5c1c246eb 100644
--- a/sysdeps/mach/hurd/htl/pt-sysdep.c
+++ b/sysdeps/mach/hurd/htl/pt-sysdep.c
@@ -26,10 +26,6 @@
#include <pt-internal.h>
#include <pthreadP.h>
-/* Initial thread structure used temporarily during initialization, so various
- * functions can already work at least basically. */
-static struct __pthread init_thread;
-
static void
reset_pthread_total (void)
{
@@ -51,10 +47,6 @@ _init_routine (void *stack)
/* Already initialized */
return;
- /* Initialize early thread structure. */
- init_thread.thread = 1;
- ___pthread_self = &init_thread;
-
/* Initialize the library. */
___pthread_init ();
@@ -116,9 +108,9 @@ _init_routine (void *stack)
#endif
/* Copy over the thread-specific state */
- assert (!init_thread.thread_specifics);
+ assert (!__pthread_init_thread.thread_specifics);
memcpy (&thread->static_thread_specifics,
- &init_thread.static_thread_specifics,
+ &__pthread_init_thread.static_thread_specifics,
sizeof (thread->static_thread_specifics));
___pthread_self = thread;
diff --git a/sysdeps/mach/hurd/htl/pt-sysdep.h
b/sysdeps/mach/hurd/htl/pt-sysdep.h
index 09d9547a8e..ef7f509611 100644
--- a/sysdeps/mach/hurd/htl/pt-sysdep.h
+++ b/sysdeps/mach/hurd/htl/pt-sysdep.h
@@ -34,6 +34,8 @@
extern __thread struct __pthread *___pthread_self;
libc_hidden_tls_proto (___pthread_self)
+extern struct __pthread ___pthread_init_thread;
+libc_hidden_proto (___pthread_init_thread)
#ifdef DEBUG
#define _pthread_self() \
--
2.43.0
