From 73c02394bff175815a22d785036a3b6883e39039 Mon Sep 17 00:00:00 2001
From: "kaznacheev@chromium.org"
 <kaznacheev@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Tue, 7 Sep 2010 13:33:40 +0000
Subject: [PATCH] Avoid pushing arguments twice in GenericBinaryOpStub.

Under some conditions (ADD, non-number arguments passed in registers)
GenerateRegisterArgumentsPush was called twice and the stack broke.

Review URL: http://codereview.chromium.org/3290012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5422 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/ia32/code-stubs-ia32.cc                     | 13 +++++----
 test/mjsunit/regress/regress-push-args-twice.js | 37 +++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 5 deletions(-)
 create mode 100644 test/mjsunit/regress/regress-push-args-twice.js

diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index bfd2650..366b91e 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -1001,15 +1001,16 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
     }
   }
 
+  // If all else fails, use the runtime system to get the correct
+  // result. If arguments was passed in registers now place them on the
+  // stack in the correct order below the return address.
+
   // Avoid hitting the string ADD code below when allocation fails in
   // the floating point code above.
   if (op_ != Token::ADD) {
     __ bind(&call_runtime);
   }
 
-  // If all else fails, use the runtime system to get the correct
-  // result. If arguments was passed in registers now place them on the
-  // stack in the correct order below the return address.
   if (HasArgsInRegisters()) {
     GenerateRegisterArgsPush(masm);
   }
@@ -1044,12 +1045,13 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB);
       __ TailCallStub(&string_add_left_stub);
 
+      Label call_runtime_with_args;
       // Left operand is not a string, test right.
       __ bind(&lhs_not_string);
       __ test(rhs, Immediate(kSmiTagMask));
-      __ j(zero, &call_runtime);
+      __ j(zero, &call_runtime_with_args);
       __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx);
-      __ j(above_equal, &call_runtime);
+      __ j(above_equal, &call_runtime_with_args);
 
       StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB);
       __ TailCallStub(&string_add_right_stub);
@@ -1059,6 +1061,7 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       if (HasArgsInRegisters()) {
         GenerateRegisterArgsPush(masm);
       }
+      __ bind(&call_runtime_with_args);
       __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
       break;
     }
diff --git a/test/mjsunit/regress/regress-push-args-twice.js b/test/mjsunit/regress/regress-push-args-twice.js
new file mode 100644
index 0000000..faa6007
--- /dev/null
+++ b/test/mjsunit/regress/regress-push-args-twice.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Check that the ADD binary op stub correctly handles non-number arguments
+// passed on registers.
+
+try {
+  for (var key = 0; key != 10; key++) {
+    var x = 1 + undefined;
+  }
+} catch(e) {
+  fail("no exception", e);
+}
-- 
2.7.4