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Date: | Tue, 11 Sep 2007 10:06:53 +1200 |
From: | Danny Smith <dannysmith AT clear DOT net DOT nz> |
Subject: | RE: gcc-dw2? or fast sjlj-exceptions EH |
To: | matsuoka AT nuce DOT nagoya-u DOT ac DOT jp |
Cc: | Cygwin <cygwin AT cygwin DOT com> |
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At http://www.cygwin.com/ml/cygwin/2007-09/msg00194.html Tatsuro Matsuoka wrote: > The best solution, I think, the speed of sjlj-exceptions EH on the > cygwin is as fast as that of other platforms. > In the case of octave, I believe that the main cause of slowdown is the sjlj EH code generated in prologue of new() Does a no-throw override of libary version of these functions help ? Danny #ifdef __USING_SJLJ_EXCEPTIONS__ #define NEW_THROW_SPEC throw() #else #define NEW_THROW_SPEC throw(std::bad_alloc) #endif #include ... void * operator new (std::size_t sz) NEW_THROW_SPEC { void *p; /* malloc (0) is unpredictable; avoid it. */ if (sz == 0) sz = 1; p = (void *) malloc (sz); while (p == 0) { new_handler handler = __new_handler; if (! handler) #ifdef __USING_SJLJ_EXCEPTIONS__ std::abort(); #else throw bad_alloc(); #endif handler (); p = (void *) malloc (sz); } return p; } void * operator new[] (std::size_t sz) NEW_THROW_SPEC { return ::operator new(sz); } -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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