Avoid GC when printing shared function info.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "execution.h"
 #include "factory.h"
 #include "macro-assembler.h"
 #include "global-handles.h"
@@ skipping 1948 matching lines @@
     }
     CHECK(t->IsSlicedString());
     CHECK(!HEAP->InNewSpace(*t));
     *slice.location() = *t.location();
   }
 
   CHECK(SlicedString::cast(*slice)->parent()->IsSeqAsciiString());
   HEAP->CollectAllGarbage(Heap::kNoGCFlags);
   CHECK(SlicedString::cast(*slice)->parent()->IsSeqAsciiString());
 }
+
+
+#ifdef OBJECT_PRINT
+TEST(PrintSharedFunctionInfo) {
+  InitializeVM();
+  v8::HandleScope scope;
+  const char* source = "f = function() { return 987654321; }\n"
+                       "g = function() { return 123456789; }\n";
+  CompileRun(source);
+  Handle<String> g_symbol = FACTORY->LookupAsciiSymbol("g");
+  JSFunction* g_func;
+  MaybeObject* maybe_obj =
+      Isolate::Current()->context()->global()->GetProperty(*g_symbol);
+  CHECK(!maybe_obj->IsFailure());
+  CHECK(maybe_obj->To<JSFunction>(&g_func));

[Michael Starzinger, 2012/07/27 09:50:27]

Consider using the following to get to the "g" function ...

Handle<JSFunction> g =
    v8::Utils::OpenHandle(
        *v8::Handle<v8::Function>::Cast(
            v8::Context::GetCurrent()->Global()->Get(v8_str("g"))));

+
+  AssertNoAllocation no_alloc;
+  g_func->shared()->PrintLn();
+}
+#endif  // OBJECT_PRINT