1 // Copyright 2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
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13 // contributors may be used to endorse or promote products derived
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16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 #include "log-utils.h"
31 #include "string-stream.h"
37 const char* const Log::kLogToTemporaryFile = "&";
40 Log::Log(Logger* logger)
43 ll_output_handle_(NULL),
45 message_buffer_(NULL),
50 static void AddIsolateIdIfNeeded(StringStream* stream) {
51 Isolate* isolate = Isolate::Current();
52 if (isolate->IsDefaultIsolate()) return;
53 stream->Add("isolate-%p-", isolate);
57 void Log::Initialize() {
58 mutex_ = OS::CreateMutex();
59 message_buffer_ = NewArray<char>(kMessageBufferSize);
61 // --log-all enables all the log flags.
63 FLAG_log_runtime = true;
67 FLAG_log_suspect = true;
68 FLAG_log_handles = true;
69 FLAG_log_regexp = true;
72 // --prof implies --log-code.
73 if (FLAG_prof) FLAG_log_code = true;
75 // --prof_lazy controls --log-code, implies --noprof_auto.
77 FLAG_log_code = false;
78 FLAG_prof_auto = false;
81 bool open_log_file = FLAG_log || FLAG_log_runtime || FLAG_log_api
82 || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
83 || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
85 // If we're logging anything, we need to open the log file.
87 if (strcmp(FLAG_logfile, "-") == 0) {
89 } else if (strcmp(FLAG_logfile, kLogToTemporaryFile) == 0) {
92 if (strchr(FLAG_logfile, '%') != NULL ||
93 !Isolate::Current()->IsDefaultIsolate()) {
94 // If there's a '%' in the log file name we have to expand
96 HeapStringAllocator allocator;
97 StringStream stream(&allocator);
98 AddIsolateIdIfNeeded(&stream);
99 for (const char* p = FLAG_logfile; *p; p++) {
104 // If there's a % at the end of the string we back up
105 // one character so we can escape the loop properly.
109 // %t expands to the current time in milliseconds.
110 double time = OS::TimeCurrentMillis();
111 stream.Add("%.0f", FmtElm(time));
115 // %% expands (contracts really) to %.
119 // All other %'s expand to themselves.
128 SmartArrayPointer<const char> expanded = stream.ToCString();
131 OpenFile(FLAG_logfile);
138 void Log::OpenStdout() {
139 ASSERT(!IsEnabled());
140 output_handle_ = stdout;
144 void Log::OpenTemporaryFile() {
145 ASSERT(!IsEnabled());
146 output_handle_ = i::OS::OpenTemporaryFile();
150 // Extension added to V8 log file name to get the low-level log name.
151 static const char kLowLevelLogExt[] = ".ll";
153 // File buffer size of the low-level log. We don't use the default to
154 // minimize the associated overhead.
155 static const int kLowLevelLogBufferSize = 2 * MB;
158 void Log::OpenFile(const char* name) {
159 ASSERT(!IsEnabled());
160 output_handle_ = OS::FOpen(name, OS::LogFileOpenMode);
162 // Open the low-level log file.
163 size_t len = strlen(name);
164 ScopedVector<char> ll_name(static_cast<int>(len + sizeof(kLowLevelLogExt)));
165 memcpy(ll_name.start(), name, len);
166 memcpy(ll_name.start() + len, kLowLevelLogExt, sizeof(kLowLevelLogExt));
167 ll_output_handle_ = OS::FOpen(ll_name.start(), OS::LogFileOpenMode);
168 setvbuf(ll_output_handle_, NULL, _IOFBF, kLowLevelLogBufferSize);
175 if (output_handle_ != NULL) {
176 if (strcmp(FLAG_logfile, kLogToTemporaryFile) != 0) {
177 fclose(output_handle_);
179 result = output_handle_;
182 output_handle_ = NULL;
183 if (ll_output_handle_ != NULL) fclose(ll_output_handle_);
184 ll_output_handle_ = NULL;
186 DeleteArray(message_buffer_);
187 message_buffer_ = NULL;
197 LogMessageBuilder::LogMessageBuilder(Logger* logger)
198 : log_(logger->log_),
201 ASSERT(log_->message_buffer_ != NULL);
205 void LogMessageBuilder::Append(const char* format, ...) {
206 Vector<char> buf(log_->message_buffer_ + pos_,
207 Log::kMessageBufferSize - pos_);
209 va_start(args, format);
210 AppendVA(format, args);
212 ASSERT(pos_ <= Log::kMessageBufferSize);
216 void LogMessageBuilder::AppendVA(const char* format, va_list args) {
217 Vector<char> buf(log_->message_buffer_ + pos_,
218 Log::kMessageBufferSize - pos_);
219 int result = v8::internal::OS::VSNPrintF(buf, format, args);
221 // Result is -1 if output was truncated.
225 pos_ = Log::kMessageBufferSize;
227 ASSERT(pos_ <= Log::kMessageBufferSize);
231 void LogMessageBuilder::Append(const char c) {
232 if (pos_ < Log::kMessageBufferSize) {
233 log_->message_buffer_[pos_++] = c;
235 ASSERT(pos_ <= Log::kMessageBufferSize);
239 void LogMessageBuilder::Append(String* str) {
240 AssertNoAllocation no_heap_allocation; // Ensure string stay valid.
241 int length = str->length();
242 for (int i = 0; i < length; i++) {
243 Append(static_cast<char>(str->Get(i)));
248 void LogMessageBuilder::AppendAddress(Address addr) {
249 Append("0x%" V8PRIxPTR, addr);
253 void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
254 if (str == NULL) return;
255 AssertNoAllocation no_heap_allocation; // Ensure string stay valid.
256 int len = str->length();
259 if (show_impl_info) {
260 Append(str->IsAsciiRepresentation() ? 'a' : '2');
261 if (StringShape(str).IsExternal())
263 if (StringShape(str).IsSymbol())
265 Append(":%i:", str->length());
267 for (int i = 0; i < len; i++) {
268 uc32 c = str->Get(i);
270 Append("\\u%04x", c);
271 } else if (c < 32 || c > 126) {
272 Append("\\x%02x", c);
273 } else if (c == ',') {
275 } else if (c == '\\') {
277 } else if (c == '\"') {
286 void LogMessageBuilder::AppendStringPart(const char* str, int len) {
287 if (pos_ + len > Log::kMessageBufferSize) {
288 len = Log::kMessageBufferSize - pos_;
290 if (len == 0) return;
292 Vector<char> buf(log_->message_buffer_ + pos_,
293 Log::kMessageBufferSize - pos_);
294 OS::StrNCpy(buf, str, len);
296 ASSERT(pos_ <= Log::kMessageBufferSize);
300 void LogMessageBuilder::WriteToLogFile() {
301 ASSERT(pos_ <= Log::kMessageBufferSize);
302 const int written = log_->WriteToFile(log_->message_buffer_, pos_);
303 if (written != pos_) {
305 log_->logger_->LogFailure();
310 } } // namespace v8::internal