deps: update V8 to 7.8.279.9

PR-URL: https://github.com/nodejs/node/pull/29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>

1 files changed, 67 insertions, 14 deletions

diff --git a/deps/v8/src/flags/flag-definitions.h b/deps/v8/src/flags/flag-definitions.h
index c32bb03407..c7c07e6dc6 100644
--- a/deps/v8/src/flags/flag-definitions.h
+++ b/deps/v8/src/flags/flag-definitions.h
@@ -206,7 +206,9 @@ DEFINE_IMPLICATION(harmony_import_meta, harmony_dynamic_import)
 #define HARMONY_INPROGRESS_BASE(V)                                        \
   V(harmony_private_methods, "harmony private methods in class literals") \
   V(harmony_regexp_sequence, "RegExp Unicode sequence properties")        \
-  V(harmony_weak_refs, "harmony weak references")
+  V(harmony_weak_refs, "harmony weak references")                         \
+  V(harmony_optional_chaining, "harmony optional chaining syntax")        \
+  V(harmony_nullish, "harmony nullish operator")
 
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_INPROGRESS(V)                              \
@@ -240,7 +242,6 @@ DEFINE_IMPLICATION(harmony_import_meta, harmony_dynamic_import)
   V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")                \
   V(harmony_import_meta, "harmony import.meta property")                   \
   V(harmony_dynamic_import, "harmony dynamic import")                      \
-  V(harmony_numeric_separator, "harmony numeric separator between digits") \
   V(harmony_promise_all_settled, "harmony Promise.allSettled")
 
 #ifdef V8_INTL_SUPPORT
@@ -298,15 +299,47 @@ DEFINE_BOOL(icu_timezone_data, true, "get information about timezones from ICU")
 #define V8_LITE_BOOL false
 #endif
 
+#ifdef V8_ENABLE_LAZY_SOURCE_POSITIONS
+#define V8_LAZY_SOURCE_POSITIONS_BOOL true
+#else
+#define V8_LAZY_SOURCE_POSITIONS_BOOL false
+#endif
+
 DEFINE_BOOL(lite_mode, V8_LITE_BOOL,
             "enables trade-off of performance for memory savings")
 
 // Lite mode implies other flags to trade-off performance for memory.
 DEFINE_IMPLICATION(lite_mode, jitless)
 DEFINE_IMPLICATION(lite_mode, lazy_feedback_allocation)
-DEFINE_IMPLICATION(lite_mode, enable_lazy_source_positions)
 DEFINE_IMPLICATION(lite_mode, optimize_for_size)
 
+#ifdef V8_DISABLE_WRITE_BARRIERS
+#define V8_DISABLE_WRITE_BARRIERS_BOOL true
+#else
+#define V8_DISABLE_WRITE_BARRIERS_BOOL false
+#endif
+
+DEFINE_BOOL_READONLY(disable_write_barriers, V8_DISABLE_WRITE_BARRIERS_BOOL,
+                     "disable write barriers when GC is non-incremental "
+                     "and heap contains single generation.")
+
+// Disable incremental marking barriers
+DEFINE_NEG_IMPLICATION(disable_write_barriers, incremental_marking)
+
+#ifdef V8_ENABLE_SINGLE_GENERATION
+#define V8_GENERATION_BOOL true
+#else
+#define V8_GENERATION_BOOL false
+#endif
+
+DEFINE_BOOL_READONLY(
+    single_generation, V8_GENERATION_BOOL,
+    "allocate all objects from young generation to old generation")
+
+// Prevent inline allocation into new space
+DEFINE_NEG_IMPLICATION(single_generation, inline_new)
+DEFINE_NEG_IMPLICATION(single_generation, turbo_allocation_folding)
+
 #ifdef V8_ENABLE_FUTURE
 #define FUTURE_BOOL true
 #else
@@ -351,10 +384,6 @@ DEFINE_BOOL(feedback_normalization, false,
 DEFINE_BOOL_READONLY(internalize_on_the_fly, true,
                      "internalize string keys for generic keyed ICs on the fly")
 
-// Flag to faster calls with arguments mismatches (https://crbug.com/v8/8895)
-DEFINE_BOOL(fast_calls_with_arguments_mismatches, true,
-            "skip arguments adaptor frames when it's provably safe")
-
 // Flag for one shot optimiztions.
 DEFINE_BOOL(enable_one_shot_optimization, true,
             "Enable size optimizations for the code that will "
@@ -409,7 +438,7 @@ DEFINE_BOOL(ignition_share_named_property_feedback, true,
             "the same object")
 DEFINE_BOOL(print_bytecode, false,
             "print bytecode generated by ignition interpreter")
-DEFINE_BOOL(enable_lazy_source_positions, false,
+DEFINE_BOOL(enable_lazy_source_positions, V8_LAZY_SOURCE_POSITIONS_BOOL,
             "skip generating source positions during initial compile but "
             "regenerate when actually required")
 DEFINE_BOOL(stress_lazy_source_positions, false,
@@ -677,13 +706,18 @@ DEFINE_STRING(dump_wasm_module_path, nullptr,
 // for configurability.
 #include "src/wasm/wasm-feature-flags.h"
 
-#define SPACE
 #define DECL_WASM_FLAG(feat, desc, val)      \
   DEFINE_BOOL(experimental_wasm_##feat, val, \
               "enable prototype " desc " for wasm")
-FOREACH_WASM_FEATURE_FLAG(DECL_WASM_FLAG, SPACE)
+FOREACH_WASM_FEATURE_FLAG(DECL_WASM_FLAG)
 #undef DECL_WASM_FLAG
-#undef SPACE
+
+DEFINE_BOOL(wasm_staging, false, "enable staged wasm features")
+
+#define WASM_STAGING_IMPLICATION(feat, desc, val) \
+  DEFINE_IMPLICATION(wasm_staging, experimental_wasm_##feat)
+FOREACH_WASM_STAGING_FEATURE_FLAG(WASM_STAGING_IMPLICATION)
+#undef WASM_STAGING_IMPLICATION
 
 DEFINE_BOOL(wasm_opt, false, "enable wasm optimization")
 DEFINE_BOOL(wasm_no_bounds_checks, false,
@@ -752,6 +786,7 @@ DEFINE_SIZE_T(
     "max size of the heap (in Mbytes) "
     "both max_semi_space_size and max_old_space_size take precedence. "
     "All three flags cannot be specified at the same time.")
+DEFINE_SIZE_T(initial_heap_size, 0, "initial size of the heap (in Mbytes)")
 DEFINE_BOOL(huge_max_old_generation_size, false,
             "Increase max size of the old space to 4 GB for x64 systems with"
             "the physical memory bigger than 16 GB")
@@ -788,9 +823,18 @@ DEFINE_BOOL(trace_gc_freelists_verbose, false,
 DEFINE_IMPLICATION(trace_gc_freelists_verbose, trace_gc_freelists)
 DEFINE_BOOL(trace_evacuation_candidates, false,
             "Show statistics about the pages evacuation by the compaction")
-DEFINE_INT(gc_freelist_strategy, 0,
+DEFINE_BOOL(
+    trace_allocations_origins, false,
+    "Show statistics about the origins of allocations. "
+    "Combine with --no-inline-new to track allocations from generated code")
+DEFINE_INT(gc_freelist_strategy, 5,
            "Freelist strategy to use: "
-           "1=FreeListFastAlloc. 2=FreeListMany. Anything else=FreeListLegacy")
+           "0:FreeListLegacy. "
+           "1:FreeListFastAlloc. "
+           "2:FreeListMany. "
+           "3:FreeListManyCached. "
+           "4:FreeListManyCachedFastPath. "
+           "5:FreeListManyCachedOrigin. ")
 
 DEFINE_INT(trace_allocation_stack_interval, -1,
            "print stack trace after <n> free-list allocations")
@@ -1210,6 +1254,9 @@ DEFINE_UINT(serialization_chunk_size, 4096,
 DEFINE_BOOL(regexp_optimization, true, "generate optimized regexp code")
 DEFINE_BOOL(regexp_mode_modifiers, false, "enable inline flags in regexp.")
 DEFINE_BOOL(regexp_interpret_all, false, "interpret all regexp code")
+DEFINE_BOOL(regexp_tier_up, false,
+            "enable regexp interpreter and tier up to the compiler")
+DEFINE_NEG_IMPLICATION(regexp_interpret_all, regexp_tier_up)
 
 // Testing flags test/cctest/test-{flags,api,serialization}.cc
 DEFINE_BOOL(testing_bool_flag, true, "testing_bool_flag")
@@ -1348,6 +1395,7 @@ DEFINE_BOOL(trace_regexp_bytecodes, false, "trace regexp bytecode execution")
 DEFINE_BOOL(trace_regexp_assembler, false,
             "trace regexp macro assembler calls.")
 DEFINE_BOOL(trace_regexp_parser, false, "trace regexp parsing")
+DEFINE_BOOL(trace_regexp_tier_up, false, "trace regexp tiering up execution")
 
 // Debugger
 DEFINE_BOOL(print_break_location, false, "print source location on debug break")
@@ -1407,6 +1455,9 @@ DEFINE_BOOL(perf_basic_prof_only_functions, false,
 DEFINE_IMPLICATION(perf_basic_prof_only_functions, perf_basic_prof)
 DEFINE_BOOL(perf_prof, false,
             "Enable perf linux profiler (experimental annotate support).")
+DEFINE_BOOL(perf_prof_annotate_wasm, false,
+            "Used with --perf-prof, load wasm source map and provide annotate "
+            "support (experimental).")
 DEFINE_NEG_IMPLICATION(perf_prof, compact_code_space)
 // TODO(v8:8462) Remove implication once perf supports remapping.
 DEFINE_NEG_IMPLICATION(perf_prof, write_protect_code_memory)
@@ -1463,7 +1514,6 @@ DEFINE_BOOL(trace_elements_transitions, false, "trace elements transitions")
 DEFINE_BOOL(trace_creation_allocation_sites, false,
             "trace the creation of allocation sites")
 
-// codegen-ia32.cc / codegen-arm.cc
 DEFINE_BOOL(print_code, false, "print generated code")
 DEFINE_BOOL(print_opt_code, false, "print optimized code")
 DEFINE_STRING(print_opt_code_filter, "*", "filter for printing optimized code")
@@ -1471,6 +1521,8 @@ DEFINE_BOOL(print_code_verbose, false, "print more information for code")
 DEFINE_BOOL(print_builtin_code, false, "print generated code for builtins")
 DEFINE_STRING(print_builtin_code_filter, "*",
               "filter for printing builtin code")
+DEFINE_BOOL(print_regexp_code, false, "print generated regexp code")
+DEFINE_BOOL(print_regexp_bytecode, false, "print generated regexp bytecode")
 DEFINE_BOOL(print_builtin_size, false, "print code size for builtins")
 
 #ifdef ENABLE_DISASSEMBLER
@@ -1487,6 +1539,7 @@ DEFINE_IMPLICATION(print_all_code, print_code)
 DEFINE_IMPLICATION(print_all_code, print_opt_code)
 DEFINE_IMPLICATION(print_all_code, print_code_verbose)
 DEFINE_IMPLICATION(print_all_code, print_builtin_code)
+DEFINE_IMPLICATION(print_all_code, print_regexp_code)
 DEFINE_IMPLICATION(print_all_code, code_comments)
 #endif