* localtime.cc (localtime_r): Call tzset.

* Makefile.in: Make version.h/cygwin.din version check a warning since it is
not foolproof.
* cygheap.h (CYGHEAPSIZE): Bump size down.
* cygtls.h (_threadinfo::stacklock): New element.
(_threadinfo::pop): Make regparm.
(_threadinfo::lock): New function.
(_threadinfo::unlock): New function.
* cygtls.cc (_threadinfo::push): Wait for a lock on the stack before performing
the operation.
(_threadinfo::pop): Move to another file.
* cygwin.din: More SIGFE changes.
* exceptions.cc (try_to_debug): Always display messages on console.
(handle_exceptions): Unwind stack only when actually about to call sig_send.
(setup_handler): Lock stack prior to performing any operations.
* gendef (_sigfe): Ditto.
(_sigbe): Ditto.
(_threadinfo::pop): Ditto.  Move here.
* gen_tlsoffsets: Generate positive offsets.
* tlsoffsets.h: Regenerate.

1 files changed, 59 insertions, 19 deletions

diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef
index d317eeacd..2457314b2 100755
--- a/winsup/cygwin/gendef
+++ b/winsup/cygwin/gendef
@@ -88,40 +88,79 @@ EOF
     if (!$main::first++) {
 	$res = <<EOF . longjmp () . $res;
 	.text
-	.global	__sigbe
-	.global	_sigreturn
-	.global	_sigdelayed
 
 	.stabs	"_sigfe:F(0,1)",36,0,0,__sigbe
 __sigfe:
 	pushl	%edx
-	movl	%fs:4,%eax
-	movl	\$4,%edx
-	xadd	%edx,$tls::stackptr(%eax)
-	leal	__sigbe,%eax
-	xchg	%eax,8(%esp)
-	movl	%eax,(%edx)
+	movl	%fs:4,%edx
+1:	movl	\$1,%eax
+	lock	cmpxchg %eax,$tls::stacklock(%edx)
+	jne	2f
+	xorl	%eax,%eax
+	call	_low_priority_sleep
+	jmp	1b
+2:	movl	\$4,%eax
+	xadd	%eax,$tls::stackptr(%edx)
+	decl	$tls::stacklock(%edx)
+	leal	__sigbe,%edx
+	xchg	%edx,8(%esp)
+	movl	%edx,(%eax)
 	popl	%edx
 	ret
 
+	.global	__sigbe
 	.stabs	"_sigbe:F(0,1)",36,0,0,__sigbe
 __sigbe:
-	pushl	%eax
 	pushl	%edx
-	movl	\$-4,%edx
-1:	movl	%fs:4,%eax
-	xadd	%edx,$tls::stackptr(%eax)
+	pushl	%eax
+	movl	%fs:4,%edx
+1:	movl	\$1,%eax
+	lock	cmpxchg %eax,$tls::stacklock(%edx)
+	jne	2f
 	xorl	%eax,%eax
-	lock    xchg %eax,-4(%edx)
-	testl	%eax,%eax
-	jnz	2f
 	call	_low_priority_sleep
-	xorl	%edx,%edx
 	jmp	1b
-2:	xchg	%eax,4(%esp)
-	popl	%edx
+2:	movl	\$-4,%eax
+	xadd	%eax,$tls::stackptr(%edx)
+	xchg	%edx,-4(%eax)
+	xchg	%edx,4(%esp)
+	popl	%eax
+	ret
+
+	.global	__ZN11_threadinfo3popEv
+__ZN11_threadinfo3popEv:
+1:	pushl	%ebx
+	movl	%eax,%edx
+	movl	\$-4,%ebx
+	xadd	%ebx,$tls::pstackptr(%edx)
+	xorl	%eax,%eax
+	xchg	%eax,-4(%ebx)
+	decl	$tls::pstacklock(%edx)
+	popl	%ebx
+	ret
+
+	.global	__ZN11_threadinfo4lockEi
+__ZN11_threadinfo4lockEi:
+	pushl	%ebx
+	movl	%eax,%ebx
+1:	movl	\$1,%eax
+	lock	cmpxchg %eax,$tls::pstacklock(%ebx)
+	jne	2f
+	cmpl	%edx,%edx
+	jz	2f
+	xorl	%eax,%eax
+	call	_low_priority_sleep
+	jmp	1b
+2:	xorl	\$1,%eax
+	popl	%ebx
 	ret
 
+	.global	__ZN11_threadinfo6unlockEv
+__ZN11_threadinfo6unlockEv:
+	decl	$tls::pstacklock(%eax)
+	ret
+
+	.global	_sigreturn
 	.stabs	"sigreturn:F(0,1)",36,0,0,_sigreturn
 _sigreturn:
 	addl	\$4,%esp			# Remove argument
@@ -147,6 +186,7 @@ _sigreturn:
 	popl	%ebp
 	jmp	__sigbe
 
+	.global	_sigdelayed
 	.stabs	"sigdelayed:F(0,1)",36,0,0,_sigdelayed
 _sigdelayed:
 	pushl	%ebp