diff --git a/tools/v8_gypfiles/inspector.gypi b/tools/v8_gypfiles/inspector.gypi
index fbf6741ea159bd..4a423bd9e8a21f 100644
--- a/tools/v8_gypfiles/inspector.gypi
+++ b/tools/v8_gypfiles/inspector.gypi
@@ -71,6 +71,8 @@
       '<(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-barrier.cc',
+      '<(V8_ROOT)/src/inspector/v8-debugger-barrier.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',
diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index 19f224d01b82d8..34af094ea61e0d 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -21,10 +21,7 @@
     'torque_outputs_inl_inc': ['<!@pymod_do_main(ForEachFormat "<(SHARED_INTERMEDIATE_DIR)/torque-generated/%s-inl.inc" <@(torque_files_replaced))'],
     'torque_outputs_cc': ['<!@pymod_do_main(ForEachFormat "<(SHARED_INTERMEDIATE_DIR)/torque-generated/%s.cc" <@(torque_files_replaced))'],
     'torque_outputs_inc': ['<!@pymod_do_main(ForEachFormat "<(SHARED_INTERMEDIATE_DIR)/torque-generated/%s.inc" <@(torque_files_replaced))'],
-    'v8_compiler_sources': [
-      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_compiler_sources = ")',
-      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_source_set.\\"v8_turboshaft.*?sources = ")',
-    ],
+    'v8_compiler_sources': ['<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_compiler_sources = ")'],
     'conditions': [
       ['v8_enable_i18n_support==1', {
         'torque_files': [
@@ -542,6 +539,18 @@
             'sources': [
               '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_maglev.*?sources \\+= ")',
             ],
+            'conditions': [
+              ['v8_target_arch=="arm64"', {
+                'sources': [
+                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_maglev.*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
+                ],
+              }],
+              ['v8_target_arch=="x64"', {
+                'sources': [
+                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_maglev.*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
+                ],
+              }],
+            ],
           }],
           ['v8_enable_webassembly==1', {
             'sources': [
@@ -570,29 +579,29 @@
           }],
           ['v8_target_arch=="ia32"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"x86\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"x86\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="x64"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
             ],
             'conditions': [
               ['OS=="win"', {
                 'sources': [
-                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"x64\\".*?is_win.*?sources \\+= ")',
+                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"x64\\".*?is_win.*?sources \\+= ")',
                 ],
               }],
               ['v8_enable_webassembly==1', {
                 'conditions': [
                   ['OS=="linux" or OS=="mac" or OS=="ios" or OS=="freebsd"', {
                     'sources': [
-                      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_linux.*?sources \\+= ")',
+                      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_linux.*?sources \\+= ")',
                     ],
                   }],
                   ['OS=="win"', {
                     'sources': [
-                      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_win.*?sources \\+= ")',
+                      '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_win.*?sources \\+= ")',
                     ],
                   }],
                 ],
@@ -601,17 +610,17 @@
           }],
           ['v8_target_arch=="arm"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"arm\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"arm\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="arm64"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
             ],
             'conditions': [
               ['v8_control_flow_integrity==1', {
                 'sources': [
-                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"arm64\\".*?v8_control_flow_integrity.*?sources \\+= ")',
+                  '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"arm64\\".*?v8_control_flow_integrity.*?sources \\+= ")',
                 ],
               }],
               ['v8_enable_webassembly==1', {
@@ -637,32 +646,32 @@
           }],
           ['v8_target_arch=="mips64" or v8_target_arch=="mips64el"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"mips64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"mips64\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="ppc"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="ppc64"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="s390x"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"s390\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"s390\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="riscv64"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
             ],
           }],
           ['v8_target_arch=="loong64"', {
             'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
             ],
           }],
         ],
@@ -705,6 +714,7 @@
         'v8_base_without_compiler',
         'v8_libbase',
         'v8_shared_internal_headers',
+        'v8_turboshaft',
       ],
       'sources': ['<@(v8_compiler_sources)'],
       'conditions': [
@@ -718,6 +728,33 @@
         }],
       ],
     },  # v8_compiler
+    {
+      'target_name': 'v8_turboshaft',
+      'type': 'static_library',
+      'toolsets': ['host', 'target'],
+      'dependencies': [
+        'generate_bytecode_builtins_list',
+        'run_torque',
+        'v8_internal_headers',
+        'v8_maybe_icu',
+        'v8_base_without_compiler',
+        'v8_libbase',
+        'v8_shared_internal_headers',
+      ],
+      'sources': [
+        '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_source_set.\\"v8_turboshaft.*?sources = ")',
+      ],
+      'conditions': [
+        ['OS=="win"', {
+          'msvs_precompiled_header': '<(V8_ROOT)/../../tools/msvs/pch/v8_pch.h',
+          'msvs_precompiled_source': '<(V8_ROOT)/../../tools/msvs/pch/v8_pch.cc',
+          'sources': [
+            '<(_msvs_precompiled_header)',
+            '<(_msvs_precompiled_source)',
+          ],
+        }],
+      ],
+    },  # v8_turboshaft
     {
       'target_name': 'v8_compiler_for_mksnapshot',
       'type': 'none',
@@ -796,6 +833,18 @@
           'sources': [
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_maglev.*?sources \\+= ")',
           ],
+          'conditions': [
+            ['v8_target_arch=="arm64"', {
+              'sources': [
+                '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_base_without_compiler.*?v8_enable_maglev.*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
+              ],
+            }],
+            ['v8_target_arch=="x64"', {
+              'sources': [
+                '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_base_without_compiler.*?v8_enable_maglev.*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
+              ],
+            }],
+          ],
         }],
         ['v8_enable_webassembly==1', {
           'sources': [
@@ -809,29 +858,29 @@
         }],
         ['v8_target_arch=="ia32"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x86.*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"x86.*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="x64"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"x64\\".*?sources \\+= ")',
           ],
           'conditions': [
             ['OS=="win"', {
               'sources': [
-                '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x64\\".*?is_win.*?sources \\+= ")',
+                '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"x64\\".*?is_win.*?sources \\+= ")',
               ],
             }],
             ['v8_enable_webassembly==1', {
               'conditions': [
                 ['OS=="linux" or OS=="mac" or OS=="ios" or OS=="freebsd"', {
                   'sources': [
-                    '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_linux.*?sources \\+= ")',
+                    '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_linux.*?sources \\+= ")',
                   ],
                 }],
                 ['OS=="win"', {
                   'sources': [
-                    '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_win.*?sources \\+= ")',
+                    '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"x64\\".*?v8_enable_webassembly.*?is_win.*?sources \\+= ")',
                   ],
                 }],
               ],
@@ -840,12 +889,12 @@
         }],
         ['v8_target_arch=="arm"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"arm\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"arm\\".*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="arm64"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"arm64\\".*?sources \\+= ")',
           ],
           'conditions': [
             ['v8_enable_webassembly==1', {
@@ -880,32 +929,32 @@
         }],
         ['v8_target_arch=="mips64" or v8_target_arch=="mips64el"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"mips64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"mips64\\".*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="ppc"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="ppc64"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="s390x"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"s390\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"s390\\".*?sources \\+= ")',
           ],
         }],
         ['v8_target_arch=="riscv64"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
           ],
         }],        
         ['v8_target_arch=="loong64"', {
           'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
           ],
         }],        
         ['OS=="win"', {
@@ -987,6 +1036,7 @@
       'dependencies': [
         'v8_base_without_compiler',
         'v8_compiler',
+        'v8_turboshaft',
       ],
     },  # v8_base
     {
@@ -1424,6 +1474,7 @@
         'v8_libbase',
         'v8_libplatform',
         'v8_maybe_icu',
+        'v8_turboshaft',
         # "build/win:default_exe_manifest",
       ],
       'sources': [