Adds an API for changing the default stack size limit.

src/execution.cc

 // Copyright 2006-2008 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
@@ skipping 204 matching lines @@
 
 // Static state for stack guards.
 StackGuard::ThreadLocal StackGuard::thread_local_;
 
 
 StackGuard::StackGuard() {
   // NOTE: Overall the StackGuard code assumes that the stack grows towards
   // lower addresses.
   ExecutionAccess access;
   if (thread_local_.nesting_++ == 0) {
-    // Initial StackGuard is being set. We will set the stack limits based on
-    // the current stack pointer allowing the stack to grow kLimitSize from
-    // here.
+    // Initial StackGuard is being set.
 
     // Ensure that either the stack limits are unset (kIllegalLimit) or that
     // they indicate a pending interruption. The interrupt limit will be
     // temporarily reset through the code below and reestablished if the
     // interrupt flags indicate that an interrupt is pending.
     ASSERT(thread_local_.jslimit_ == kIllegalLimit ||
            (thread_local_.jslimit_ == kInterruptLimit &&
             thread_local_.interrupt_flags_ != 0));
     ASSERT(thread_local_.climit_ == kIllegalLimit ||
            (thread_local_.climit_ == kInterruptLimit &&
             thread_local_.interrupt_flags_ != 0));
 
-    uintptr_t limit = GENERATED_CODE_STACK_LIMIT(kLimitSize);
-    thread_local_.initial_jslimit_ = thread_local_.jslimit_ = limit;
-    Heap::SetStackLimit(limit);
-    // NOTE: The check for overflow is not safe as there is no guarantee that
-    // the running thread has its stack in all memory up to address 0x00000000.
-    thread_local_.initial_climit_ = thread_local_.climit_ =
-        reinterpret_cast<uintptr_t>(this) >= kLimitSize ?
-            reinterpret_cast<uintptr_t>(this) - kLimitSize : 0;
+    if (thread_local_.initial_jslimit_ == kIllegalLimit ||
+        thread_local_.initial_climit_ == kIllegalLimit) {
+      CHECK(thread_local_.initial_jslimit_ == kIllegalLimit);
+      CHECK(thread_local_.initial_climit_ == kIllegalLimit);
+
+      // No limit has been set with ResourceConstraints. We will set
+      // the stack limits based on the current stack pointer allowing
+      // the stack to grow kLimitSize from here.
+      uintptr_t limit = GENERATED_CODE_STACK_LIMIT(kLimitSize);
+      thread_local_.initial_jslimit_ = limit;
+
+      // NOTE: The check for overflow is not safe as there is no
+      // guarantee that the running thread has its stack in all memory
+      // up to address 0x00000000.
+      thread_local_.initial_climit_ =
+          reinterpret_cast<uintptr_t>(this) >= kLimitSize ?
+              reinterpret_cast<uintptr_t>(this) - kLimitSize : 0;
+    }
+    thread_local_.jslimit_ = thread_local_.initial_jslimit_;
+    thread_local_.climit_ = thread_local_.initial_climit_;
+    Heap::SetStackLimit(thread_local_.jslimit_);
 
     if (thread_local_.interrupt_flags_ != 0) {
       set_limits(kInterruptLimit, access);
     }
   }
   // Ensure that proper limits have been set.
   ASSERT(thread_local_.jslimit_ != kIllegalLimit &&
          thread_local_.climit_ != kIllegalLimit);
   ASSERT(thread_local_.initial_jslimit_ != kIllegalLimit &&
          thread_local_.initial_climit_ != kIllegalLimit);
@@ skipping 18 matching lines @@
 void StackGuard::EnableInterrupts() {
   ExecutionAccess access;
   if (IsSet(access)) {
     set_limits(kInterruptLimit, access);
   }
 }
 
 
 void StackGuard::SetStackLimit(uintptr_t limit) {
   ExecutionAccess access;
-  // If the current limits are special (eg due to a pending interrupt) then
-  // leave them alone.
-  if (thread_local_.jslimit_ == thread_local_.initial_jslimit_) {
-    thread_local_.jslimit_ = limit;
-    Heap::SetStackLimit(limit);
-  }
-  if (thread_local_.climit_ == thread_local_.initial_climit_) {
-    thread_local_.climit_ = limit;
-  }
+  CHECK(thread_local_.nesting_ == 0);
   thread_local_.initial_climit_ = limit;
   thread_local_.initial_jslimit_ = limit;
 }
 
 
 void StackGuard::DisableInterrupts() {
   ExecutionAccess access;
   reset_limits(access);
 }
 
@@ skipping 380 matching lines @@
   // All allocation spaces other than NEW_SPACE have the same effect.
   Heap::CollectAllGarbage(false);
   return v8::Undefined();
 }
 
 
 static GCExtension kGCExtension;
 v8::DeclareExtension kGCExtensionDeclaration(&kGCExtension);
 
 } }  // namespace v8::internal