Update.

2003-11-05  Jakub Jelinek  <jakub@redhat.com>

	* unwind.c (FRAME_LEFT): Define.
	(unwind_stop): Handle old style cleanups here.
	(__pthread_unwind): Handle old style cleanups only if
	!HAVE_FORCED_UNWIND.
	* Makefile (tests): Add tst-cleanup4 and tst-cleanupx4.
	(CFLAGS-tst-cleanupx4.c): Add -fexceptions.
	($(objpfx)tst-cleanup4): Depend on $(objpfx)tst-cleanup4aux.o.
	($(objpfx)tst-cleanupx4): Likewise.
	* tst-cleanup4.c: New test.
	* tst-cleanup4aux.c: New.
	* tst-cleanupx4.c: New test.

nptl/ChangeLog

@@ -1,3 +1,17 @@
+2003-11-05  Jakub Jelinek  <jakub@redhat.com>
+
+	* unwind.c (FRAME_LEFT): Define.
+	(unwind_stop): Handle old style cleanups here.
+	(__pthread_unwind): Handle old style cleanups only if
+	!HAVE_FORCED_UNWIND.
+	* Makefile (tests): Add tst-cleanup4 and tst-cleanupx4.
+	(CFLAGS-tst-cleanupx4.c): Add -fexceptions.
+	($(objpfx)tst-cleanup4): Depend on $(objpfx)tst-cleanup4aux.o.
+	($(objpfx)tst-cleanupx4): Likewise.
+	* tst-cleanup4.c: New test.
+	* tst-cleanup4aux.c: New.
+	* tst-cleanupx4.c: New test.
+
 2003-11-04  Ulrich Drepper  <drepper@redhat.com>
 
 	* sysdeps/pthread/bits/stdio-lock.h: Use lll_*lock instead of

nptl/Makefile

@@ -216,7 +216,7 @@ tests = tst-attr1 tst-attr2 tst-attr3 \
 	tst-cancel6 tst-cancel7 tst-cancel8 tst-cancel9 tst-cancel10 \
 	tst-cancel11 tst-cancel12 tst-cancel13 tst-cancel14 tst-cancel15 \
 	tst-cancel16 tst-cancel17 tst-cancel18 tst-cancel19 \
-	tst-cleanup0 tst-cleanup1 tst-cleanup2 tst-cleanup3 \
+	tst-cleanup0 tst-cleanup1 tst-cleanup2 tst-cleanup3 tst-cleanup4 \
 	tst-flock1 tst-flock2 \
 	tst-signal1 tst-signal2 tst-signal3 tst-signal4 tst-signal5 \
 	tst-signal6 \
@@ -248,7 +248,7 @@ tests += tst-cancelx2 tst-cancelx3 tst-cancelx4 tst-cancelx5 \
 	 tst-cancelx6 tst-cancelx7 tst-cancelx8 tst-cancelx9 tst-cancelx10 \
 	 tst-cancelx11 tst-cancelx12 tst-cancelx13 tst-cancelx14 tst-cancelx15\
 	 tst-cancelx16 tst-cancelx17 tst-cancelx18 \
-	 tst-cleanupx0 tst-cleanupx1 tst-cleanupx2 tst-cleanupx3 \
+	 tst-cleanupx0 tst-cleanupx1 tst-cleanupx2 tst-cleanupx3 tst-cleanupx4 \
 	 tst-oncex3 tst-oncex4
 endif
 ifeq ($(build-shared),yes)
@@ -393,6 +393,7 @@ CFLAGS-tst-cleanupx0.c += -fexceptions -fasynchronous-unwind-tables
 CFLAGS-tst-cleanupx1.c += -fexceptions -fasynchronous-unwind-tables
 CFLAGS-tst-cleanupx2.c += -fexceptions
 CFLAGS-tst-cleanupx3.c += -fexceptions
+CFLAGS-tst-cleanupx4.c += -fexceptions
 CFLAGS-tst-oncex3.c += -fexceptions
 CFLAGS-tst-oncex4.c += -fexceptions
 CFLAGS-tst-align.c += $(stack-align-test-flags)
@@ -405,6 +406,9 @@ LDFLAGS-tst-atfork2 = -rdynamic
 tst-atfork2-ENV = MALLOC_TRACE=$(objpfx)tst-atfork2.mtrace
 $(objpfx)tst-atfork2mod.so: $(shared-thread-library)
 
+$(objpfx)tst-cleanup4: $(objpfx)tst-cleanup4aux.o $(shared-thread-library)
+$(objpfx)tst-cleanupx4: $(objpfx)tst-cleanup4aux.o $(shared-thread-library)
+
 $(objpfx)tst-tls3: $(libdl) $(shared-thread-library)
 LDFLAGS-tst-tls3 = -rdynamic
 $(objpfx)tst-tls3.out: $(objpfx)tst-tls3mod.so

nptl/tst-cleanup4.c

@@ -0,0 +1,198 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* LinuxThreads pthread_cleanup_{push,pop} helpers.  */
+extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer,
+                                   void (*__routine) (void *),
+                                   void *__arg);
+extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer,
+                                  int __execute);
+
+static int fds[2];
+static pthread_barrier_t b2;
+static int global;
+
+/* Defined in tst-cleanup4aux.c, never compiled with -fexceptions.  */
+extern void fn5 (void);
+extern void fn7 (void);
+extern void fn9 (void);
+
+void
+clh (void *arg)
+{
+  int val = (long int) arg;
+
+  printf ("clh (%d)\n", val);
+
+  global *= val;
+  global += val;
+}
+
+
+static __attribute__((noinline)) void
+fn_read (void)
+{
+  int r = pthread_barrier_wait (&b2);
+  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
+    {
+      printf ("%s: barrier_wait failed\n", __FUNCTION__);
+      exit (1);
+    }
+
+  char c;
+  read (fds[0], &c, 1);
+}
+
+
+__attribute__((noinline)) void
+fn0 (void)
+{
+  pthread_cleanup_push (clh, (void *) 1l);
+
+  fn_read ();
+
+  pthread_cleanup_pop (1);
+}
+
+
+__attribute__((noinline)) void
+fn1 (void)
+{
+  /* This is the old LinuxThreads pthread_cleanup_{push,pop}.  */
+  struct _pthread_cleanup_buffer b;
+  _pthread_cleanup_push (&b, clh, (void *) 2l);
+
+  fn0 ();
+
+  _pthread_cleanup_pop (&b, 1);
+}
+
+
+static __attribute__((noinline)) void
+fn2 (void)
+{
+  pthread_cleanup_push (clh, (void *) 3l);
+
+  fn1 ();
+
+  pthread_cleanup_pop (1);
+}
+
+
+static void *
+tf (void *a)
+{
+  switch ((long) a)
+    {
+    case 0:
+      fn2 ();
+      break;
+    case 1:
+      fn5 ();
+      break;
+    case 2:
+      fn7 ();
+      break;
+    case 3:
+      fn9 ();
+      break;
+    }
+
+  return NULL;
+}
+
+
+int
+do_test (void)
+{
+  int result = 0;
+
+  if (pipe (fds) != 0)
+    {
+      puts ("pipe failed");
+      exit (1);
+    }
+
+  if (pthread_barrier_init (&b2, NULL, 2) != 0)
+    {
+      puts ("b2 init failed");
+      exit (1);
+    }
+
+  const int expect[] =
+    {
+      15,	/* 1 2 3 */
+      276,	/* 1 4 5 6 */
+      120,	/* 1 7 8 */
+      460	/* 1 2 9 10 */
+    };
+
+  long i;
+  for (i = 0; i < 4; ++i)
+    {
+      global = 0;
+
+      printf ("test %ld\n", i);
+
+      pthread_t th;
+      if (pthread_create (&th, NULL, tf, (void *) i) != 0)
+	{
+	  puts ("create failed");
+	  exit (1);
+	}
+
+      int e = pthread_barrier_wait (&b2);
+      if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  printf ("%s: barrier_wait failed\n", __FUNCTION__);
+	  exit (1);
+	}
+
+      pthread_cancel (th);
+
+      void *r;
+      if ((e = pthread_join (th, &r)) != 0)
+	{
+	  printf ("join failed: %d\n", e);
+	  _exit (1);
+	}
+
+      if (r != PTHREAD_CANCELED)
+	{
+	  puts ("thread not canceled");
+	  exit (1);
+	}
+
+      if (global != expect[i])
+	{
+	  printf ("global = %d, expected %d\n", global, expect[i]);
+	  result = 1;
+	}
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"

nptl/tst-cleanup4aux.c

@@ -0,0 +1,121 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer,
+                                   void (*__routine) (void *),
+                                   void *__arg);
+extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer,
+                                  int __execute);
+
+extern void clh (void *arg);
+extern void fn0 (void);
+extern void fn1 (void);
+extern void fn5 (void);
+extern void fn7 (void);
+extern void fn9 (void);
+
+
+static __attribute__((noinline)) void
+fn3 (void)
+{
+  /* This is the old LinuxThreads pthread_cleanup_{push,pop}.  */
+     struct _pthread_cleanup_buffer b;
+  _pthread_cleanup_push (&b, clh, (void *) 4l);
+
+  fn0 ();
+        
+  _pthread_cleanup_pop (&b, 1);
+}
+
+
+static __attribute__((noinline)) void
+fn4 (void)
+{
+  pthread_cleanup_push (clh, (void *) 5l);
+
+  fn3 ();
+
+  pthread_cleanup_pop (1);
+}
+
+
+void
+fn5 (void)
+{
+  /* This is the old LinuxThreads pthread_cleanup_{push,pop}.  */
+     struct _pthread_cleanup_buffer b;
+  _pthread_cleanup_push (&b, clh, (void *) 6l);
+
+  fn4 ();
+        
+  _pthread_cleanup_pop (&b, 1);
+}
+
+
+static __attribute__((noinline)) void
+fn6 (void)
+{
+  pthread_cleanup_push (clh, (void *) 7l);
+
+  fn0 ();
+
+  pthread_cleanup_pop (1);
+}
+
+
+void
+fn7 (void)
+{
+  /* This is the old LinuxThreads pthread_cleanup_{push,pop}.  */
+     struct _pthread_cleanup_buffer b;
+  _pthread_cleanup_push (&b, clh, (void *) 8l);
+
+  fn6 ();
+        
+  _pthread_cleanup_pop (&b, 1);
+}
+
+
+static __attribute__((noinline)) void
+fn8 (void)
+{
+  pthread_cleanup_push (clh, (void *) 9l);
+
+  fn1 ();
+
+  pthread_cleanup_pop (1);
+}
+
+
+void
+fn9 (void)
+{
+  /* This is the old LinuxThreads pthread_cleanup_{push,pop}.  */
+     struct _pthread_cleanup_buffer b;
+  _pthread_cleanup_push (&b, clh, (void *) 10l);
+
+  fn8 ();
+        
+  _pthread_cleanup_pop (&b, 1);
+}

nptl/tst-cleanupx4.c

@@ -0,0 +1 @@
+#include "tst-cleanup4.c"

nptl/unwind.c

@@ -27,6 +27,14 @@
 
 #ifdef HAVE_FORCED_UNWIND
 
+#ifdef _STACK_GROWS_DOWN
+# define FRAME_LEFT(frame, other) ((char *) frame >= (char *) other)
+#elif _STACK_GROWS_UP
+# define FRAME_LEFT(frame, other) ((char *) frame <= (char *) other)
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+
 static _Unwind_Reason_Code
 unwind_stop (int version, _Unwind_Action actions,
 	     _Unwind_Exception_Class exc_class,
@@ -34,6 +42,9 @@ unwind_stop (int version, _Unwind_Action actions,
 	     struct _Unwind_Context *context, void *stop_parameter)
 {
   struct pthread_unwind_buf *buf = stop_parameter;
+  struct pthread *self = THREAD_SELF;
+  struct _pthread_cleanup_buffer *curp = THREAD_GETMEM (self, cleanup);
+  int do_longjump = 0;
 
   /* Do longjmp if we're at "end of stack", aka "end of unwind data".
      We assume there are only C frame without unwind data in between
@@ -42,6 +53,37 @@ unwind_stop (int version, _Unwind_Action actions,
      previous frame.  */
   if ((actions & _UA_END_OF_STACK)
       || ! _JMPBUF_CFA_UNWINDS  (buf->cancel_jmp_buf[0].jmp_buf, context))
+    do_longjump = 1;
+
+  if (__builtin_expect (curp != NULL, 0))
+    {
+      /* Handle the compatibility stuff.  Execute all handlers
+	 registered with the old method which would be unwound by this
+	 step.  */
+      struct _pthread_cleanup_buffer *oldp = buf->priv.data.cleanup;
+      void *cfa = (void *) _Unwind_GetCFA (context);
+
+      if (curp != oldp && (do_longjump || FRAME_LEFT (cfa, curp)))
+	{
+	  do
+	    {
+	      /* Pointer to the next element.  */
+	      struct _pthread_cleanup_buffer *nextp = curp->__prev;
+
+	      /* Call the handler.  */
+	      curp->__routine (curp->__arg);
+
+	      /* To the next.  */
+	      curp = nextp;
+	    }
+	  while (curp != oldp && (do_longjump || FRAME_LEFT (cfa, curp)));
+
+	  /* Mark the current element as handled.  */
+	  THREAD_SETMEM (self, cleanup, curp);
+	}
+    }
+
+  if (do_longjump)
     __libc_longjmp ((struct __jmp_buf_tag *) buf->cancel_jmp_buf, 1);
 
   return _URC_NO_REASON;
@@ -70,6 +112,14 @@ __pthread_unwind (__pthread_unwind_buf_t *buf)
   struct pthread_unwind_buf *ibuf = (struct pthread_unwind_buf *) buf;
   struct pthread *self = THREAD_SELF;
 
+#ifdef HAVE_FORCED_UNWIND
+  /* This is not a catchable exception, so don't provide any details about
+     the exception type.  We do need to initialize the field though.  */
+  THREAD_SETMEM (self, exc.exception_class, 0);
+  THREAD_SETMEM (self, exc.exception_cleanup, unwind_cleanup);
+
+  _Unwind_ForcedUnwind (&self->exc, unwind_stop, ibuf);
+#else
   /* Handle the compatibility stuff first.  Execute all handlers
      registered with the old method.  We don't execute them in order,
      instead, they will run first.  */
@@ -95,14 +145,6 @@ __pthread_unwind (__pthread_unwind_buf_t *buf)
       THREAD_SETMEM (self, cleanup, curp);
     }
 
-#ifdef HAVE_FORCED_UNWIND
-  /* This is not a catchable exception, so don't provide any details about
-     the exception type.  We do need to initialize the field though.  */
-  THREAD_SETMEM (self, exc.exception_class, 0);
-  THREAD_SETMEM (self, exc.exception_cleanup, unwind_cleanup);
-
-  _Unwind_ForcedUnwind (&self->exc, unwind_stop, ibuf);
-#else
   /* We simply jump to the registered setjmp buffer.  */
   __libc_longjmp ((struct __jmp_buf_tag *) ibuf->cancel_jmp_buf, 1);
 #endif