Version 3.3.3
Added support for generating Visual Studio solution and project files using GYP.
Implemented support for ARM EABI calling convention variation where floating-point arguments are passed in registers (hardfloat).
Added Object::HasOwnProperty() to the API.
Added support for compressing startup data to reduce binary size. This includes build time support and an API for the embedder to decompress the startup data before initializing V8.
Reduced the profiling hooks overhead from >400% to 25% when using ll_prof.
Performance improvements and bug fixes on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@7749 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/log-utils.cc b/src/log-utils.cc
index a854ade..1bba7cd 100644
--- a/src/log-utils.cc
+++ b/src/log-utils.cc
@@ -126,7 +126,7 @@
: write_to_file_(false),
is_stopped_(false),
output_handle_(NULL),
- output_code_handle_(NULL),
+ ll_output_handle_(NULL),
output_buffer_(NULL),
mutex_(NULL),
message_buffer_(NULL),
@@ -168,7 +168,7 @@
bool start_logging = FLAG_log || FLAG_log_runtime || FLAG_log_api
|| FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
- || FLAG_log_regexp || FLAG_log_state_changes;
+ || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
bool open_log_file = start_logging || FLAG_prof_lazy;
@@ -233,7 +233,12 @@
}
-static const char kCodeLogExt[] = ".code";
+// Extension added to V8 log file name to get the low-level log name.
+static const char kLowLevelLogExt[] = ".ll";
+
+// File buffer size of the low-level log. We don't use the default to
+// minimize the associated overhead.
+static const int kLowLevelLogBufferSize = 2 * MB;
void Log::OpenFile(const char* name) {
@@ -241,14 +246,13 @@
output_handle_ = OS::FOpen(name, OS::LogFileOpenMode);
write_to_file_ = true;
if (FLAG_ll_prof) {
- // Open a file for logging the contents of code objects so that
- // they can be disassembled later.
- size_t name_len = strlen(name);
- ScopedVector<char> code_name(
- static_cast<int>(name_len + sizeof(kCodeLogExt)));
- memcpy(code_name.start(), name, name_len);
- memcpy(code_name.start() + name_len, kCodeLogExt, sizeof(kCodeLogExt));
- output_code_handle_ = OS::FOpen(code_name.start(), OS::LogFileOpenMode);
+ // Open the low-level log file.
+ size_t len = strlen(name);
+ ScopedVector<char> ll_name(static_cast<int>(len + sizeof(kLowLevelLogExt)));
+ memcpy(ll_name.start(), name, len);
+ memcpy(ll_name.start() + len, kLowLevelLogExt, sizeof(kLowLevelLogExt));
+ ll_output_handle_ = OS::FOpen(ll_name.start(), OS::LogFileOpenMode);
+ setvbuf(ll_output_handle_, NULL, _IOFBF, kLowLevelLogBufferSize);
}
}
@@ -266,8 +270,8 @@
if (write_to_file_) {
if (output_handle_ != NULL) fclose(output_handle_);
output_handle_ = NULL;
- if (output_code_handle_ != NULL) fclose(output_code_handle_);
- output_code_handle_ = NULL;
+ if (ll_output_handle_ != NULL) fclose(ll_output_handle_);
+ ll_output_handle_ = NULL;
} else {
delete output_buffer_;
output_buffer_ = NULL;
@@ -361,6 +365,7 @@
void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
+ if (str == NULL) return;
AssertNoAllocation no_heap_allocation; // Ensure string stay valid.
int len = str->length();
if (len > 0x1000)