postmortem: export private field offsets

tools/gen-postmortem-metadata.py

Index: tools/gen-postmortem-metadata.py
diff --git a/tools/gen-postmortem-metadata.py b/tools/gen-postmortem-metadata.py
index 032b713393b6609cf8323fae732c846d7178b35b..76c8ad8364cc81adcf94f9d6018c982462494137 100644
--- a/tools/gen-postmortem-metadata.py
+++ b/tools/gen-postmortem-metadata.py
@@ -181,6 +181,25 @@ consts_misc = [
         'value': 'JSArrayBuffer::WasNeutered::kMask' },
     { 'name': 'jsarray_buffer_was_neutered_shift',
         'value': 'JSArrayBuffer::WasNeutered::kShift' },
+
+    { 'name': 'new_space',
+        'value': 'AllocationSpace::NEW_SPACE' },
+    { 'name': 'old_space',
+        'value': 'AllocationSpace::OLD_SPACE' },
+    { 'name': 'code_space',
+        'value': 'AllocationSpace::CODE_SPACE' },
+    { 'name': 'map_space',
+        'value': 'AllocationSpace::MAP_SPACE' },
+    { 'name': 'lo_space',
+        'value': 'AllocationSpace::LO_SPACE' },
+    { 'name': 'first_space',
+        'value': 'AllocationSpace::FIRST_SPACE' },
+    { 'name': 'last_space',
+        'value': 'AllocationSpace::LAST_SPACE' },
+    { 'name': 'first_paged_space',
+        'value': 'AllocationSpace::FIRST_PAGED_SPACE' },
+    { 'name': 'last_paged_space',
+        'value': 'AllocationSpace::LAST_PAGED_SPACE' },
 ];
 
 #
@@ -223,6 +242,7 @@ extras_accessors = [
     'SlicedString, parent, String, kParentOffset',
     'Code, instruction_start, uintptr_t, kHeaderSize',
     'Code, instruction_size, int, kInstructionSizeOffset',
+    'Heap, root_count, int, kRootListLength',
 ];
 
 #
@@ -237,6 +257,67 @@ expected_classes = [
 ];
 
 
+private_fields = [
+    { 'class': 'Isolate', 'field': 'heap_' },
+
+    { 'class': 'Heap', 'field': 'amount_of_external_allocated_memory_' },
+    { 'class': 'Heap', 'field': 'roots_' },
+    { 'class': 'Heap', 'field': 'new_space_' },
+    { 'class': 'Heap', 'field': 'old_space_' },
+    { 'class': 'Heap', 'field': 'code_space_' },
+    { 'class': 'Heap', 'field': 'map_space_' },
+    { 'class': 'Heap', 'field': 'lo_space_' },
+
+    { 'class': 'NewSpace', 'field': 'heap_' },
+    { 'class': 'NewSpace', 'field': 'id_' },
+    { 'class': 'NewSpace', 'field': 'executable_' },
+    { 'class': 'NewSpace', 'field': 'to_space_' },
+    { 'class': 'NewSpace', 'field': 'from_space_' },
+    { 'class': 'NewSpace', 'field': 'pages_used_' },
+
+    { 'class': 'SemiSpace', 'field': 'heap_' },
+    { 'class': 'SemiSpace', 'field': 'id_' },
+    { 'class': 'SemiSpace', 'field': 'executable_' },
+    { 'class': 'SemiSpace', 'field': 'anchor_' },
+    { 'class': 'SemiSpace', 'field': 'current_page_' },
+    { 'class': 'SemiSpace', 'field': 'committed_' },
+
+    { 'class': 'OldSpace', 'field': 'heap_' },
+    { 'class': 'OldSpace', 'field': 'id_' },
+    { 'class': 'OldSpace', 'field': 'executable_' },
+    { 'class': 'OldSpace', 'field': 'anchor_' },
+
+    { 'class': 'MapSpace', 'field': 'heap_' },
+    { 'class': 'MapSpace', 'field': 'id_' },
+    { 'class': 'MapSpace', 'field': 'executable_' },
+    { 'class': 'MapSpace', 'field': 'anchor_' },
+
+    { 'class': 'LargeObjectSpace', 'field': 'heap_' },
+    { 'class': 'LargeObjectSpace', 'field': 'id_' },
+    { 'class': 'LargeObjectSpace', 'field': 'executable_' },
+    { 'class': 'LargeObjectSpace', 'field': 'size_' },
+    { 'class': 'LargeObjectSpace', 'field': 'objects_size_' },
+    { 'class': 'LargeObjectSpace', 'field': 'first_page_' },
+
+    { 'class': 'Page', 'field': 'size_' },
+    { 'class': 'Page', 'field': 'area_start_' },
+    { 'class': 'Page', 'field': 'area_end_' },
+    { 'class': 'Page', 'field': 'prev_chunk_' },
+    { 'class': 'Page', 'field': 'next_chunk_' },
+
+    { 'class': 'NewSpacePage', 'field': 'size_' },
+    { 'class': 'NewSpacePage', 'field': 'area_start_' },
+    { 'class': 'NewSpacePage', 'field': 'area_end_' },
+    { 'class': 'NewSpacePage', 'field': 'prev_chunk_' },
+    { 'class': 'NewSpacePage', 'field': 'next_chunk_' },
+
+    { 'class': 'LargePage', 'field': 'size_' },
+    { 'class': 'LargePage', 'field': 'area_start_' },
+    { 'class': 'LargePage', 'field': 'area_end_' },
+    { 'class': 'LargePage', 'field': 'prev_chunk_' },
+    { 'class': 'LargePage', 'field': 'next_chunk_' },
+];
+
 #
 # The following structures store high-level representations of the structures
 # for which we're going to emit descriptive constants.
@@ -538,6 +619,31 @@ def emit_set(out, consts):
         out.write('\n');
 
 #
+# Emit private fields class and values
+#
+def emit_private_fields(out, fields, consts):
+        # Fix up overzealous parses.  This could be done inside the
+        # parsers but as there are several, it's easiest to do it here.
+        ws = re.compile('\s+')
+        out.write('namespace v8 {\n');
+        out.write('namespace internal {\n\n');
+        out.write('class PostMortem {\n');
+        out.write(' public:\n');
+        for field in fields:
+                klass = ws.sub('', field['class'])
+                field = ws.sub('', field['field'])
+                out.write('  static const int k%s__%s = offsetof(%s, %s);\n' %
+                        (klass, field, klass, field));
+                consts.append({
+                    'name': 'field_%s__%s' % (klass, field),
+                    'value': 'v8::internal::PostMortem::k%s__%s' %
+                        (klass, field)
+                });
+        out.write('};\n');
+        out.write('}  // namespace internal\n');
+        out.write('}  // namespace v8\n\n');
+
+#
 # Emit the whole output file.
 #
 def emit_config():
@@ -580,6 +686,12 @@ def emit_config():
         out.write('/* field information */\n');
         emit_set(out, fields);
 
+        out.write('/* private fields */\n');
+        consts = []
+        emit_private_fields(out, private_fields, consts);
+
+        emit_set(out, consts);
+
         out.write(footer);
 
 if (len(sys.argv) < 4):