[Boost-testing] Patch for sigaltstack failure on Leopard with XCode 3.0

From: Jeroen van der Wulp (J.v.d.Wulp_at_[hidden])
Date: 2008-07-13 11:33:04

Hello everyone,

The recent changes to Boost.test on trunk have caused testing failures 
on OS X. The problem is that internally an exception is thrown on 
destruction of every signal_handler. The result looks like this:

boost/boost/test/minimal.hpp(123): exception "system_error produced by: 
::sigaltstack( &sigstk, 0 ) != -1: Cannot allocate memory" caught in 
function: 'int main(int, char**)'

The cause seems to be that the implementation of sigaltstack() on 
Leopard requires the ss_size of a stack_t structure to be MINSIGSTKSZ at 
least.

The attached patch accomplishes just this.

Regards,

Jeroen van der Wulp

Index: 3rd-party/boost/boost/test/impl/execution_monitor.ipp
===================================================================
--- 3rd-party/boost/boost/test/impl/execution_monitor.ipp	(revision 47301)
+++ 3rd-party/boost/boost/test/impl/execution_monitor.ipp	(working copy)
@@ -669,6 +669,7 @@
 #ifdef BOOST_TEST_USE_ALT_STACK
     stack_t sigstk = {};
 
+    sigstk.ss_size  = BOOST_TEST_ALT_STACK_SIZE;
     sigstk.ss_flags = SS_DISABLE;
     BOOST_TEST_SYS_ASSERT( ::sigaltstack( &sigstk, 0 ) != -1 );
 #endif