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+2013-11-08 Balaji V.

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+2013-11-08  Balaji V. Iyer  <balaji.v.iyer@intel.com>
+
+       PR c/59039
+       * runtime/cilk_fiber-unix.cpp: Fixed a crash in run() function
+       when optimization is turned on.
+

From-SVN: r204592
This commit is contained in:
Balaji V. Iyer 2013-11-08 19:52:27 +00:00 committed by Balaji V. Iyer
parent 3361dd3a6d
commit d53b3432e2
2 changed files with 37 additions and 18 deletions
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6
libcilkrts/ChangeLog
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@ -1,3 +1,9 @@
2013-11-08 Balaji V. Iyer <balaji.v.iyer@intel.com>
PR c/59039
* runtime/cilk_fiber-unix.cpp: Fixed a crash in run() function
when optimization is turned on.
2013-11-04 Balaji V. Iyer <balaji.v.iyer@intel.com>
PR bootstrap/58951

49
libcilkrts/runtime/cilk_fiber-unix.cpp
View File

@ -44,24 +44,27 @@
#include <cstdio>
#include <cstdlib>
#if defined HAVE_ALLOCA_H
# include <alloca.h>
#elif defined __GNUC__
# define alloca __builtin_alloca
#elif defined _AIX
# define alloca __alloca
#else
# include <stddef.h>
# ifdef __cplusplus
extern "C"
# endif
void *alloca (size_t);
#endif
#include <errno.h>
#include <sys/mman.h>
#include <unistd.h>
// You'd think that getting a defintion for alloca would be easy. But you'd
// be wrong. Here's a variant on what's recommended in the autoconf doc. I've
// remove the Windows portion since this is Unix-specific code.
#if defined HAVE_ALLOCA_H
# include <alloca.h>
#elif defined __GNUC__
# define alloca __builtin_alloca
#elif defined _AIX
# define alloca __alloca
#else
# include <stddef.h>
# ifdef __cplusplus
extern "C"
# endif
void *alloca (size_t);
#endif
// MAP_ANON is deprecated on Linux, but seems to be required on Mac...
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
@ -163,8 +166,15 @@ NORETURN cilk_fiber_sysdep::jump_to_resume_other_sysdep(cilk_fiber_sysdep* other
__cilkrts_bug("Should not get here");
}
#pragma GCC push_options
#pragma GCC optimize ("-O0")
// GCC doesn't allow us to call __builtin_longjmp in the same function that
// calls __builtin_setjmp, so create a new function to house the call to
// __builtin_longjmp
static void __attribute__((noinline))
do_cilk_longjmp(__CILK_JUMP_BUFFER jmpbuf)
{
CILK_LONGJMP(jmpbuf);
}
NORETURN cilk_fiber_sysdep::run()
{
// Only fibers created from a pool have a proc method to run and execute.
@ -201,7 +211,11 @@ NORETURN cilk_fiber_sysdep::run()
// switching to for any temporaries required for this run()
// function.
JMPBUF_SP(m_resume_jmpbuf) = m_stack_base - frame_size;
CILK_LONGJMP(m_resume_jmpbuf);
// GCC doesn't allow us to call __builtin_longjmp in the same function
// that calls __builtin_setjmp, so it's been moved into it's own
// function that cannot be inlined.
do_cilk_longjmp(m_resume_jmpbuf);
}
// Note: our resetting of the stack pointer is valid only if the
@ -228,7 +242,6 @@ NORETURN cilk_fiber_sysdep::run()
// User proc should never return.
__cilkrts_bug("Should not get here");
}
#pragma GCC pop_options
void cilk_fiber_sysdep::make_stack(size_t stack_size)
{