deps: update V8 to 7.5.288.22

PR-URL: https://github.com/nodejs/node/pull/27375
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 15 insertions, 9 deletions

diff --git a/deps/v8/src/base/platform/platform-posix.cc b/deps/v8/src/base/platform/platform-posix.cc
index 33a9371a92..2301c26688 100644
--- a/deps/v8/src/base/platform/platform-posix.cc
+++ b/deps/v8/src/base/platform/platform-posix.cc
@@ -43,7 +43,7 @@
 #include "src/base/utils/random-number-generator.h"
 
 #ifdef V8_FAST_TLS_SUPPORTED
-#include "src/base/atomicops.h"
+#include <atomic>
 #endif
 
 #if V8_OS_MACOSX
@@ -444,15 +444,22 @@ class PosixMemoryMappedFile final : public OS::MemoryMappedFile {
 
 
 // static
-OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
-  if (FILE* file = fopen(name, "r+")) {
+OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name,
+                                                 FileMode mode) {
+  const char* fopen_mode = (mode == FileMode::kReadOnly) ? "r" : "r+";
+  if (FILE* file = fopen(name, fopen_mode)) {
     if (fseek(file, 0, SEEK_END) == 0) {
       long size = ftell(file);  // NOLINT(runtime/int)
       if (size == 0) return new PosixMemoryMappedFile(file, nullptr, 0);
       if (size > 0) {
+        int prot = PROT_READ;
+        int flags = MAP_PRIVATE;
+        if (mode == FileMode::kReadWrite) {
+          prot |= PROT_WRITE;
+          flags = MAP_SHARED;
+        }
         void* const memory =
-            mmap(OS::GetRandomMmapAddr(), size, PROT_READ | PROT_WRITE,
-                 MAP_SHARED, fileno(file), 0);
+            mmap(OS::GetRandomMmapAddr(), size, prot, flags, fileno(file), 0);
         if (memory != MAP_FAILED) {
           return new PosixMemoryMappedFile(file, memory, size);
         }
@@ -463,7 +470,6 @@ OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
   return nullptr;
 }
 
-
 // static
 OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name,
                                                    size_t size, void* initial) {
@@ -815,7 +821,7 @@ static pthread_key_t LocalKeyToPthreadKey(Thread::LocalStorageKey local_key) {
 
 #ifdef V8_FAST_TLS_SUPPORTED
 
-static Atomic32 tls_base_offset_initialized = 0;
+static std::atomic<bool> tls_base_offset_initialized{false};
 intptr_t kMacTlsBaseOffset = 0;
 
 // It's safe to do the initialization more that once, but it has to be
@@ -851,7 +857,7 @@ static void InitializeTlsBaseOffset() {
     kMacTlsBaseOffset = 0;
   }
 
-  Release_Store(&tls_base_offset_initialized, 1);
+  tls_base_offset_initialized.store(true, std::memory_order_release);
 }
 
 
@@ -871,7 +877,7 @@ static void CheckFastTls(Thread::LocalStorageKey key) {
 Thread::LocalStorageKey Thread::CreateThreadLocalKey() {
 #ifdef V8_FAST_TLS_SUPPORTED
   bool check_fast_tls = false;
-  if (tls_base_offset_initialized == 0) {
+  if (!tls_base_offset_initialized.load(std::memory_order_acquire)) {
     check_fast_tls = true;
     InitializeTlsBaseOffset();
   }