* vm_exec.h (VM_DEBUG_STACKOVERFLOW): added.

  disable stack overflow check for every stack pushing as default.
* vm_exec.c (vm_stack_overflow_for_insn): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44275 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 16 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 7816e9221a..83a084c278 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Wed Dec 18 14:32:06 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* vm_exec.h (VM_DEBUG_STACKOVERFLOW): added.
+	  disable stack overflow check for every stack pushing as default.
+
+	* vm_exec.c (vm_stack_overflow_for_insn): ditto.
+
 Wed Dec 18 10:00:22 2013  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/rubygems:  Update to RubyGems master d8f12e2.  This increases the
diff --git a/vm_exec.c b/vm_exec.c
index c7057cd445..a8b14e30de 100644
--- a/vm_exec.c
+++ b/vm_exec.c
@@ -29,6 +29,7 @@ static void vm_analysis_insn(int insn);
 #endif
 /* #define DECL_SC_REG(r, reg) VALUE reg_##r */
 
+#if VM_DEBUG_STACKOVERFLOW
 NORETURN(static void vm_stack_overflow_for_insn(void));
 static void
 vm_stack_overflow_for_insn(void)
@@ -37,6 +38,7 @@ vm_stack_overflow_for_insn(void)
 	   "Please contact ruby-core/dev with your (a part of) script. "
 	   "This check will be removed soon.");
 }
+#endif
 
 #if !OPT_CALL_THREADED_CODE
 static VALUE
diff --git a/vm_exec.h b/vm_exec.h
index e087a7f603..391eb6d151 100644
--- a/vm_exec.h
+++ b/vm_exec.h
@@ -169,7 +169,14 @@ default:                        \
 #endif
 
 #define SCREG(r) (reg_##r)
+
+#define VM_DEBUG_STACKOVERFLOW 0
+
+#if VM_DEBUG_STACKOVERFLOW
 #define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) \
     WHEN_VM_STACK_OVERFLOWED(cfp, (cfp)->sp, margin) vm_stack_overflow_for_insn()
+#else
+#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin)
+#endif
 
 #endif /* RUBY_VM_EXEC_H */