Add postmortem metadata to access bytecode

Bug: v8:12092
Change-Id: Ibca6082c28cfd5b23680d554b692bc8ab60cb416
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3094013Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76300}

AUTHORS

@@ -223,6 +223,7 @@ Tao Liqiang <taolq@outlook.com>
 Teddy Katz <teddy.katz@gmail.com>
 Thomas Young <wenzhang5800@gmail.com>
 Tiancheng "Timothy" Gu <timothygu99@gmail.com>
+Timo Teräs <timo.teras@iki.fi>
 Tobias Burnus <burnus@net-b.de>
 Tobias Nießen <tniessen@tnie.de>
 Ujjwal Sharma <usharma1998@gmail.com>

tools/gen-postmortem-metadata.py

@@ -91,6 +91,16 @@ consts_misc = [
     { 'name': 'TaggedSize',             'value': 'kTaggedSize' },
     { 'name': 'TaggedSizeLog2',         'value': 'kTaggedSizeLog2' },
 
+    { 'name': 'CodeKindFieldMask',      'value': 'Code::KindField::kMask' },
+    { 'name': 'CodeKindFieldShift',     'value': 'Code::KindField::kShift' },
+
+    { 'name': 'CodeKindBytecodeHandler',
+      'value': 'static_cast<int>(CodeKind::BYTECODE_HANDLER)' },
+    { 'name': 'CodeKindInterpretedFunction',
+      'value': 'static_cast<int>(CodeKind::INTERPRETED_FUNCTION)' },
+    { 'name': 'CodeKindBaseline',
+      'value': 'static_cast<int>(CodeKind::BASELINE)' },
+
     { 'name': 'OddballFalse',           'value': 'Oddball::kFalse' },
     { 'name': 'OddballTrue',            'value': 'Oddball::kTrue' },
     { 'name': 'OddballTheHole',         'value': 'Oddball::kTheHole' },
@@ -189,6 +199,10 @@ consts_misc = [
         'value': 'StandardFrameConstants::kFunctionOffset' },
     { 'name': 'off_fp_args',
         'value': 'StandardFrameConstants::kFixedFrameSizeAboveFp' },
+    { 'name': 'off_fp_bytecode_array',
+        'value': 'UnoptimizedFrameConstants::kBytecodeArrayFromFp' },
+    { 'name': 'off_fp_bytecode_offset',
+        'value': 'UnoptimizedFrameConstants::kBytecodeOffsetOrFeedbackVectorFromFp' },
 
     { 'name': 'scopeinfo_idx_nparams',
         'value': 'ScopeInfo::kParameterCount' },
@@ -250,6 +264,7 @@ extras_accessors = [
     'JSObject, elements, Object, kElementsOffset',
     'JSObject, internal_fields, uintptr_t, kHeaderSize',
     'FixedArray, data, uintptr_t, kHeaderSize',
+    'BytecodeArray, data, uintptr_t, kHeaderSize',
     'JSArrayBuffer, backing_store, uintptr_t, kBackingStoreOffset',
     'JSArrayBuffer, byte_length, size_t, kByteLengthOffset',
     'JSArrayBufferView, byte_length, size_t, kByteLengthOffset',
@@ -273,6 +288,7 @@ extras_accessors = [
     'UncompiledData, inferred_name, String, kInferredNameOffset',
     'UncompiledData, start_position, int32_t, kStartPositionOffset',
     'UncompiledData, end_position, int32_t, kEndPositionOffset',
+    'Script, source, Object, kSourceOffset',
     'Script, name, Object, kNameOffset',
     'Script, line_ends, Object, kLineEndsOffset',
     'SharedFunctionInfo, raw_function_token_offset, int16_t, kFunctionTokenOffsetOffset',
@@ -280,6 +296,7 @@ extras_accessors = [
     'SharedFunctionInfo, flags, int, kFlagsOffset',
     'SharedFunctionInfo, length, uint16_t, kLengthOffset',
     'SlicedString, parent, String, kParentOffset',
+    'Code, flags, uint32_t, kFlagsOffset',
     'Code, instruction_start, uintptr_t, kHeaderSize',
     'Code, instruction_size, int, kInstructionSizeOffset',
     'String, length, int32_t, kLengthOffset',