From feeccf0d1055b6685acf1d7d7259300e82179727 Mon Sep 17 00:00:00 2001
From: "jochen@chromium.org"
 <jochen@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Fri, 28 Mar 2014 14:16:11 +0000
Subject: [PATCH] Revert r20335 - "Raise StackOverflow during bootstrapping"

Reason for revert: New test crashes on nosnap bots

> See https://github.com/joyent/node/issues/7120
>
> R=jarin@chromium.org
> BUG=
>
> Review URL: https://codereview.chromium.org/178073002
>
> Patch from Alexis Campailla <alexis@janeasystems.com>.

TBR=jarin@chromium.org
BUG=none
LOG=n

Review URL: https://codereview.chromium.org/217013002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20337 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/bootstrapper.cc     | 15 +++++-------
 src/isolate.h           |  5 ----
 test/cctest/test-api.cc | 61 -------------------------------------------------
 3 files changed, 6 insertions(+), 75 deletions(-)

diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index ce625b7..6496e26 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1476,6 +1476,11 @@ bool Genesis::CompileNative(Isolate* isolate,
 #ifdef ENABLE_DEBUGGER_SUPPORT
   isolate->debugger()->set_compiling_natives(true);
 #endif
+  // During genesis, the boilerplate for stack overflow won't work until the
+  // environment has been at least partially initialized. Add a stack check
+  // before entering JS code to catch overflow early.
+  StackLimitCheck check(isolate);
+  if (check.HasOverflowed()) return false;
 
   bool result = CompileScriptCached(isolate,
                                     name,
@@ -2609,16 +2614,8 @@ Genesis::Genesis(Isolate* isolate,
   // During genesis, the boilerplate for stack overflow won't work until the
   // environment has been at least partially initialized. Add a stack check
   // before entering JS code to catch overflow early.
-  const uint32_t stack_to_get_through_genesis = 3500 * sizeof(intptr_t);
   StackLimitCheck check(isolate);
-  if (check.WillOverflow(stack_to_get_through_genesis)) {
-    // Only raise a StackOverflow if there is a valid current context
-    if (isolate->context() != NULL) {
-      isolate->StackOverflow();
-      isolate->OptionalRescheduleException(true);
-    }
-    return;
-  }
+  if (check.HasOverflowed()) return;
 
   // We can only de-serialize a context if the isolate was initialized from
   // a snapshot. Otherwise we have to build the context from scratch.
diff --git a/src/isolate.h b/src/isolate.h
index bcb7cd4..b471378 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1438,11 +1438,6 @@ class StackLimitCheck BASE_EMBEDDED {
     StackGuard* stack_guard = isolate_->stack_guard();
     return (reinterpret_cast<uintptr_t>(this) < stack_guard->real_climit());
   }
-  bool WillOverflow(uint32_t additionalUsage) const {
-    StackGuard* stack_guard = isolate_->stack_guard();
-    return (reinterpret_cast<uintptr_t>(this) < stack_guard->real_climit() +
-        additionalUsage);
-  }
  private:
   Isolate* isolate_;
 };
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index ed0a2fb..276663a 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -5023,67 +5023,6 @@ TEST(APIStackOverflowAndVerboseTryCatch) {
   v8::V8::RemoveMessageListeners(receive_message);
 }
 
-void APIStackOverflowNestedContextsHelper(bool is_bottom_call);
-
-void APIStackOverflowNestedContextsCallback(
-  const v8::FunctionCallbackInfo<Value>& args) {
-  APIStackOverflowNestedContextsHelper(false);
-}
-
-
-void APIStackOverflowNestedContextsHelper(bool is_bottom_call) {
-  v8::Isolate* isolate = CcTest::isolate();
-  TryCatch try_catch;
-
-  Local<ObjectTemplate> global = ObjectTemplate::New();
-  global->Set(String::NewFromUtf8(isolate, "recur"),
-  FunctionTemplate::New(isolate, APIStackOverflowNestedContextsCallback));
-
-  Local<Context> innerContext = Context::New(isolate, NULL, global);
-  if (try_catch.HasCaught()) {
-    try_catch.ReThrow();
-    return;
-  }
-  if (innerContext.IsEmpty()) return;
-
-  Context::Scope context_scope(innerContext);
-  Local<Script> script = v8::Script::Compile(v8::String::NewFromUtf8(
-      isolate,
-      "function f() {                             "
-      "  try { recur(); } catch(e) { throw e; }   "
-      "  return 'bad';                            "
-      "} f();                                     "));
-
-  Local<Value> result = script->Run();
-  CHECK(result.IsEmpty());
-  if (try_catch.HasCaught()) {
-    if (is_bottom_call) {
-      String::Utf8Value ex_value(try_catch.Exception());
-      CHECK_EQ("RangeError: Maximum call stack size exceeded", *ex_value);
-    }
-    try_catch.ReThrow();
-  }
-}
-
-
-void APIStackOverflowNestedContexts(int extra_stack_bytes) {
-  if (extra_stack_bytes) alloca(extra_stack_bytes);
-  LocalContext context;
-  v8::HandleScope scope(context->GetIsolate());
-  v8::TryCatch try_catch;
-  APIStackOverflowNestedContextsHelper(true);
-  CHECK(try_catch.HasCaught());
-}
-
-
-TEST(APIStackOverflowNestedContexts) {
-  // The place where a stack overflow can occur is not completely deterministic
-  // so probe a few different depths
-  APIStackOverflowNestedContexts(2500);
-  APIStackOverflowNestedContexts(2800);
-  APIStackOverflowNestedContexts(30000);
-}
-
 
 THREADED_TEST(ExternalScriptException) {
   v8::Isolate* isolate = CcTest::isolate();
-- 
2.7.4