Introduce mkgrokdump to update tools/v8heapconst.py.

tools/mkgrokdump.cc

Index: tools/mkgrokdump.cc
diff --git a/tools/mkgrokdump.cc b/tools/mkgrokdump.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3fcd4460076e102123da134a1bd3078676a80086
--- /dev/null
+++ b/tools/mkgrokdump.cc
@@ -0,0 +1,114 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdio.h>
+
+#include "include/libplatform/libplatform.h"
+#include "include/v8.h"
+
+#include "src/frames.h"
+#include "src/heap/heap.h"
+#include "src/heap/spaces.h"
+#include "src/isolate.h"
+#include "src/objects-inl.h"
+
+namespace v8 {
+
+static const char* kHeader =
+    "# Copyright 2017 the V8 project authors. All rights reserved.\n"
+    "# Use of this source code is governed by a BSD-style license that can\n"
+    "# be found in the LICENSE file.\n"
+    "\n"
+    "# This file is automatically generated by mkgrokdump and should not\n"
+    "# be modified manually.\n"
+    "\n"
+    "# List of known V8 instance types.\n";
+
+class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+ public:
+  void* Allocate(size_t length) override { return nullptr; }
+  void* AllocateUninitialized(size_t length) override { return nullptr; }
+  void Free(void* p, size_t) override {}
+};
+
+static int DumpHeapConstants(const char* argv0) {
+  // Start up V8.
+  v8::Platform* platform = v8::platform::CreateDefaultPlatform();
+  v8::V8::InitializePlatform(platform);
+  v8::V8::Initialize();
+  v8::V8::InitializeExternalStartupData(argv0);
+  Isolate::CreateParams create_params;
+  MockArrayBufferAllocator mock_arraybuffer_allocator;
+  create_params.array_buffer_allocator = &mock_arraybuffer_allocator;
+  Isolate* isolate = Isolate::New(create_params);
+  {
+    Isolate::Scope scope(isolate);
+    i::Heap* heap = reinterpret_cast<i::Isolate*>(isolate)->heap();
+    printf("%s", kHeader);
+#define DUMP_TYPE(T) printf("  %d: \"%s\",\n", i::T, #T);
+    printf("INSTANCE_TYPES = {\n");
+    INSTANCE_TYPE_LIST(DUMP_TYPE)
+    printf("}\n");
+#undef DUMP_TYPE
+
+    // Dump the KNOWN_MAP table to the console.
+    printf("\n# List of known V8 maps.\n");
+#define ROOT_LIST_CASE(type, name, camel_name) \
+  if (n == NULL && o == heap->name()) n = #camel_name;
+#define STRUCT_LIST_CASE(upper_name, camel_name, name) \
+  if (n == NULL && o == heap->name##_map()) n = #camel_name "Map";
+    i::HeapObjectIterator it(heap->map_space());
+    printf("KNOWN_MAPS = {\n");
+    for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
+      i::Map* m = i::Map::cast(o);
+      const char* n = NULL;
+      intptr_t p = reinterpret_cast<intptr_t>(m) & 0x7ffff;
+      int t = m->instance_type();
+      ROOT_LIST(ROOT_LIST_CASE)
+      STRUCT_LIST(STRUCT_LIST_CASE)
+      if (n == NULL) continue;
+      printf("  0x%05" V8PRIxPTR ": (%d, \"%s\"),\n", p, t, n);
+    }
+    printf("}\n");
+#undef STRUCT_LIST_CASE
+#undef ROOT_LIST_CASE
+
+    // Dump the KNOWN_OBJECTS table to the console.
+    printf("\n# List of known V8 objects.\n");
+#define ROOT_LIST_CASE(type, name, camel_name) \
+  if (n == NULL && o == heap->name()) n = #camel_name;
+    i::OldSpaces spit(heap);
+    printf("KNOWN_OBJECTS = {\n");
+    for (i::PagedSpace* s = spit.next(); s != NULL; s = spit.next()) {
+      i::HeapObjectIterator it(s);
+      const char* sname = AllocationSpaceName(s->identity());
+      for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
+        const char* n = NULL;
+        intptr_t p = reinterpret_cast<intptr_t>(o) & 0x7ffff;
+        ROOT_LIST(ROOT_LIST_CASE)
+        if (n == NULL) continue;
+        printf("  (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", sname, p, n);
+      }
+    }
+    printf("}\n");
+#undef ROOT_LIST_CASE
+
+    // Dump frame markers
+    printf("\n# List of known V8 Frame Markers.\n");
+#define DUMP_MARKER(T, class) printf("  \"%s\",\n", #T);
+    printf("FRAME_MARKERS = (\n");
+    STACK_FRAME_TYPE_LIST(DUMP_MARKER)
+    printf(")\n");
+#undef DUMP_TYPE
+  }
+  // Teardown.
+  isolate->Dispose();
+  v8::V8::ShutdownPlatform();
+  delete platform;
+  return 0;
+}
+
+}  // namespace v8
+
+int main(int argc, char* argv[]) { return v8::DumpHeapConstants(argv[0]); }