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configure.in: rb_cv_mcontext_t_ptr

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* configure.in (rb_cv_mcontext_t_ptr): abstract whether mcontext_t
  is a pointer type.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-12-13 08:59:54 +00:00
parent 21a40e94ac
commit 7dc4bbc140
2 changed files with 12 additions and 2 deletions
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11
configure.in
View file

@ -2712,6 +2712,17 @@ if test x"$enable_pthread" = xyes; then
fi
fi
if test x"$ac_cv_header_ucontext_h" = xyes; then
AC_CACHE_CHECK([if mcontext_t is a pointer], [rb_cv_mcontext_t_ptr],
[AC_TRY_COMPILE([@%:@include <ucontext.h>
mcontext_t test(mcontext_t mc) {return mc+1;}
],
[test(0);],
[rb_cv_mcontext_t_ptr=yes], [rb_cv_mcontext_t_ptr=no])])
if test x"$rb_cv_mcontext_t_ptr" = xyes; then
AC_DEFINE_UNQUOTED(DEFINE_MCONTEXT_PTR(mc, uc), mcontext_t mc = (uc)->uc_mcontext)
else
AC_DEFINE_UNQUOTED(DEFINE_MCONTEXT_PTR(mc, uc), mcontext_t *mc = &(uc)->uc_mcontext)
fi
if test x"$rb_with_pthread" = xyes; then
AC_CHECK_FUNCS(getcontext setcontext)
fi

3
signal.c
View file

@ -742,15 +742,14 @@ NORETURN(void ruby_thread_stack_overflow(rb_thread_t *th));
static void
check_stack_overflow(const uintptr_t addr, const ucontext_t *ctx)
{
const DEFINE_MCONTEXT_PTR(mctx, ctx);
# if defined __linux__
const mcontext_t *mctx = &ctx->uc_mcontext;
# if defined REG_RSP
const greg_t sp = mctx->gregs[REG_RSP];
# else
const greg_t sp = mctx->gregs[REG_ESP];
# endif
# elif defined __APPLE__
const mcontext_t mctx = ctx->uc_mcontext;
# if defined(__LP64__)
const uintptr_t sp = mctx->__ss.__rsp;
# else