diff --git a/tools/v8_gypfiles/inspector.gypi b/tools/v8_gypfiles/inspector.gypi
index 75a876ff763814..f8f9a1c1b7a392 100644
--- a/tools/v8_gypfiles/inspector.gypi
+++ b/tools/v8_gypfiles/inspector.gypi
@@ -73,6 +73,8 @@
       '<(V8_ROOT)/src/inspector/v8-debugger.h',
       '<(V8_ROOT)/src/inspector/v8-debugger-agent-impl.cc',
       '<(V8_ROOT)/src/inspector/v8-debugger-agent-impl.h',
+      '<(V8_ROOT)/src/inspector/v8-debugger-id.cc',
+      '<(V8_ROOT)/src/inspector/v8-debugger-id.h',
       '<(V8_ROOT)/src/inspector/v8-debugger-script.cc',
       '<(V8_ROOT)/src/inspector/v8-debugger-script.h',
       '<(V8_ROOT)/src/inspector/v8-heap-profiler-agent-impl.cc',
diff --git a/tools/v8_gypfiles/toolchain.gypi b/tools/v8_gypfiles/toolchain.gypi
index 4b75f865369239..165ba936e562d5 100644
--- a/tools/v8_gypfiles/toolchain.gypi
+++ b/tools/v8_gypfiles/toolchain.gypi
@@ -304,6 +304,9 @@
             'defines': [
               'V8_TARGET_ARCH_PPC64',
             ],
+            'cflags': [
+              '-ffp-contract=off',
+            ],
           }],
           ['v8_host_byteorder=="little"', {
             'defines': [
@@ -1341,12 +1344,13 @@
       4324,  # Padding structure due to alignment.
       # 4351, # [refack] Old issue with array init.
       4355,  # 'this' used in base member initializer list
+      4506,  # Benign "no definition for inline function"
       4661,  # no suitable definition provided for explicit template instantiation request
       4701,  # Potentially uninitialized local variable.
       4702,  # Unreachable code.
       4703,  # Potentially uninitialized local pointer variable.
       4709,  # Comma operator within array index expr (bugged).
-      # 4714,  # Function marked forceinline not inlined.
+      4714,  # Function marked forceinline not inlined.
       4715,  # Not all control paths return a value. (see https://crbug.com/v8/7658)
       4718,  # Recursive call has no side-effect.
       4723,  # https://crbug.com/v8/7771
diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index 071540524bcfeb..9abbcc0289d9af 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -64,26 +64,24 @@
             '<@(torque_files)',
           ],
           'outputs': [
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/bit-fields.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/builtin-definitions.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/interface-descriptors.inc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/factory.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/factory.inc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/field-offsets.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-verifiers.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-verifiers.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/enum-verifiers.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/objects-printer.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/objects-body-descriptors-inl.inc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-debug-readers.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-debug-readers.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/exported-macros-assembler.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/exported-macros-assembler.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/csa-types.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/instance-types.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/runtime-macros.cc',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/runtime-macros.h',
-            '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-forward-declarations.h',
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/bit-fields.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/builtin-definitions.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/interface-descriptors.inc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/factory.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/factory.inc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/field-offsets.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-verifiers.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-verifiers.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/enum-verifiers.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/objects-printer.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/objects-body-descriptors-inl.inc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-debug-readers.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-debug-readers.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/exported-macros-assembler.cc",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/exported-macros-assembler.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/csa-types.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/instance-types.h",
+            "<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-forward-declarations.h",
             '<@(torque_outputs_csa_cc)',
             '<@(torque_outputs_csa_h)',
             '<@(torque_outputs_inl_inc)',
@@ -92,9 +90,9 @@
           ],
           'action': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)torque<(EXECUTABLE_SUFFIX)',
-            '<@(torque_files_without_v8_root)',
             '-o', '<(SHARED_INTERMEDIATE_DIR)/torque-generated',
-            '-v8-root', '<(V8_ROOT)'
+            '-v8-root', '<(V8_ROOT)',
+            '<@(torque_files_without_v8_root)',
           ],
         },
       ],
@@ -166,7 +164,6 @@
           '<(SHARED_INTERMEDIATE_DIR)/torque-generated/class-verifiers.h',
           '<(SHARED_INTERMEDIATE_DIR)/torque-generated/factory.cc',
           '<(SHARED_INTERMEDIATE_DIR)/torque-generated/objects-printer.cc',
-          '<(SHARED_INTERMEDIATE_DIR)/torque-generated/runtime-macros.cc',
         ],
         'include_dirs': [
           '<(SHARED_INTERMEDIATE_DIR)',
@@ -1092,6 +1089,8 @@
         '<(V8_ROOT)/src/libplatform/delayed-task-queue.h',
         '<(V8_ROOT)/src/libplatform/task-queue.cc',
         '<(V8_ROOT)/src/libplatform/task-queue.h',
+        '<(V8_ROOT)/src/libplatform/tracing/recorder-default.cc',
+        '<(V8_ROOT)/src/libplatform/tracing/recorder.h',
         '<(V8_ROOT)/src/libplatform/tracing/trace-buffer.cc',
         '<(V8_ROOT)/src/libplatform/tracing/trace-buffer.h',
         '<(V8_ROOT)/src/libplatform/tracing/trace-config.cc',
@@ -1112,10 +1111,17 @@
           },
           'defines': ['BUILDING_V8_PLATFORM_SHARED'],
         }],
-        ['v8_use_perfetto', {
+        ['v8_use_perfetto==1', {
+          'sources!': [
+            '<(V8_ROOT)/base/trace_event/common/trace_event_common.h',
+            '<(V8_ROOT)/src/libplatform/tracing/recorder-default.cc',
+            '<(V8_ROOT)/src/libplatform/tracing/trace-buffer.cc',
+            '<(V8_ROOT)/src/libplatform/tracing/trace-buffer.h',
+            '<(V8_ROOT)/src/libplatform/tracing/trace-object.cc',
+            '<(V8_ROOT)/src/libplatform/tracing/trace-writer.cc',
+            '<(V8_ROOT)/src/libplatform/tracing/trace-writer.h',
+          ],
           'sources': [
-            '<(V8_ROOT)/src/libplatform/tracing/json-trace-event-listener.cc',
-            '<(V8_ROOT)/src/libplatform/tracing/json-trace-event-listener.h',
             '<(V8_ROOT)/src/libplatform/tracing/trace-event-listener.cc',
             '<(V8_ROOT)/src/libplatform/tracing/trace-event-listener.h',
           ],
@@ -1124,6 +1130,14 @@
             '<(V8_ROOT)/third_party/perfetto/protos/perfetto/trace:lite',
           ],
         }],
+        ['v8_use_perfetto==0 and is_win', {
+          'sources!': [
+            '<(V8_ROOT)/src/libplatform/tracing/recorder-default.cc',
+          ],
+          'sources': [
+            '<(V8_ROOT)/src/libplatform/tracing/recorder-win.cc',
+          ],
+        }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [