runtime/base/logging.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "logging.h"

 #include "base/mutex.h"
 #include "runtime.h"
 #include "thread-inl.h"
 #include "UniquePtr.h"
 #include "utils.h"

 namespace art {

 LogVerbosity gLogVerbosity;

 unsigned int gAborting = 0;

 static LogSeverity gMinimumLogSeverity = INFO;
 static UniquePtr<std::string> gCmdLine;
 static UniquePtr<std::string> gProgramInvocationName;
 static UniquePtr<std::string> gProgramInvocationShortName;

 const char* GetCmdLine() {
   return (gCmdLine.get() != nullptr) ? gCmdLine->c_str() : nullptr;
 }

 const char* ProgramInvocationName() {
   return (gProgramInvocationName.get() != nullptr) ? gProgramInvocationName->c_str() : "art";
 }

 const char* ProgramInvocationShortName() {
   return (gProgramInvocationShortName.get() != nullptr) ? gProgramInvocationShortName->c_str()
                                                         : "art";
 }

 // Configure logging based on ANDROID_LOG_TAGS environment variable.
 // We need to parse a string that looks like
 //
 //      *:v jdwp:d dalvikvm:d dalvikvm-gc:i dalvikvmi:i
 //
 // The tag (or '*' for the global level) comes first, followed by a colon
 // and a letter indicating the minimum priority level we're expected to log.
 // This can be used to reveal or conceal logs with specific tags.
 void InitLogging(char* argv[]) {
   if (gCmdLine.get() != nullptr) {
     return;
   }
   // TODO: Move this to a more obvious InitART...
   Locks::Init();

   // Stash the command line for later use. We can use /proc/self/cmdline on Linux to recover this,
   // but we don't have that luxury on the Mac, and there are a couple of argv[0] variants that are
   // commonly used.
   if (argv != NULL) {
     gCmdLine.reset(new std::string(argv[0]));
     for (size_t i = 1; argv[i] != NULL; ++i) {
       gCmdLine->append(" ");
       gCmdLine->append(argv[i]);
     }
     gProgramInvocationName.reset(new std::string(argv[0]));
     const char* last_slash = strrchr(argv[0], '/');
     gProgramInvocationShortName.reset(new std::string((last_slash != NULL) ? last_slash + 1
                                                                            : argv[0]));
   } else {
     // TODO: fall back to /proc/self/cmdline when argv is NULL on Linux
     gCmdLine.reset(new std::string("<unset>"));
   }
   const char* tags = getenv("ANDROID_LOG_TAGS");
   if (tags == NULL) {
     return;
   }

   std::vector<std::string> specs;
   Split(tags, ' ', specs);
   for (size_t i = 0; i < specs.size(); ++i) {
     // "tag-pattern:[vdiwefs]"
     std::string spec(specs[i]);
     if (spec.size() == 3 && StartsWith(spec, "*:")) {
       switch (spec[2]) {
         case 'v':
           gMinimumLogSeverity = VERBOSE;
           continue;
         case 'd':
           gMinimumLogSeverity = DEBUG;
           continue;
         case 'i':
           gMinimumLogSeverity = INFO;
           continue;
         case 'w':
           gMinimumLogSeverity = WARNING;
           continue;
         case 'e':
           gMinimumLogSeverity = ERROR;
           continue;
         case 'f':
           gMinimumLogSeverity = FATAL;
           continue;
         // liblog will even suppress FATAL if you say 's' for silent, but that's crazy!
         case 's':
           gMinimumLogSeverity = FATAL;
           continue;
       }
     }
     LOG(FATAL) << "unsupported '" << spec << "' in ANDROID_LOG_TAGS (" << tags << ")";
   }
 }

 LogMessageData::LogMessageData(const char* file, int line, LogSeverity severity, int error)
     : file(file),
       line_number(line),
       severity(severity),
       error(error) {
   const char* last_slash = strrchr(file, '/');
   file = (last_slash == NULL) ? file : last_slash + 1;
 }

 LogMessage::~LogMessage() {
   if (data_->severity < gMinimumLogSeverity) {
     return;  // No need to format something we're not going to output.
   }

   // Finish constructing the message.
   if (data_->error != -1) {
     data_->buffer << ": " << strerror(data_->error);
   }
   std::string msg(data_->buffer.str());

   // Do the actual logging with the lock held.
   {
     MutexLock mu(Thread::Current(), *Locks::logging_lock_);
     if (msg.find('\n') == std::string::npos) {
       LogLine(*data_, msg.c_str());
     } else {
       msg += '\n';
       size_t i = 0;
       while (i < msg.size()) {
         size_t nl = msg.find('\n', i);
         msg[nl] = '\0';
         LogLine(*data_, &msg[i]);
         i = nl + 1;
       }
     }
   }

   // Abort if necessary.
   if (data_->severity == FATAL) {
     Runtime::Abort();
   }
 }

 HexDump::HexDump(const void* address, size_t byte_count, bool show_actual_addresses)
     : address_(address), byte_count_(byte_count), show_actual_addresses_(show_actual_addresses) {
 }

 void HexDump::Dump(std::ostream& os) const {
   if (byte_count_ == 0) {
     return;
   }

   if (address_ == NULL) {
     os << "00000000:";
     return;
   }

   static const char gHexDigit[] = "0123456789abcdef";
   const unsigned char* addr = reinterpret_cast<const unsigned char*>(address_);
   char out[76];           /* exact fit */
   unsigned int offset;    /* offset to show while printing */

   if (show_actual_addresses_) {
     offset = reinterpret_cast<int>(addr);
   } else {
     offset = 0;
   }
   memset(out, ' ', sizeof(out)-1);
   out[8] = ':';
   out[sizeof(out)-1] = '\0';

   size_t byte_count = byte_count_;
   int gap = static_cast<int>(offset & 0x0f);
   while (byte_count) {
     unsigned int line_offset = offset & ~0x0f;

     char* hex = out;
     char* asc = out + 59;

     for (int i = 0; i < 8; i++) {
       *hex++ = gHexDigit[line_offset >> 28];
       line_offset <<= 4;
     }
     hex++;
     hex++;

     int count = std::min(static_cast<int>(byte_count), 16 - gap);
     CHECK_NE(count, 0);
     CHECK_LE(count + gap, 16);

     if (gap) {
       /* only on first line */
       hex += gap * 3;
       asc += gap;
     }

     int i;
     for (i = gap ; i < count+gap; i++) {
       *hex++ = gHexDigit[*addr >> 4];
       *hex++ = gHexDigit[*addr & 0x0f];
       hex++;
       if (*addr >= 0x20 && *addr < 0x7f /*isprint(*addr)*/) {
         *asc++ = *addr;
       } else {
         *asc++ = '.';
       }
       addr++;
     }
     for (; i < 16; i++) {
       /* erase extra stuff; only happens on last line */
       *hex++ = ' ';
       *hex++ = ' ';
       hex++;
       *asc++ = ' ';
     }

     os << out;

     gap = 0;
     byte_count -= count;
     offset += count;
   }
 }

 std::ostream& operator<<(std::ostream& os, const HexDump& rhs) {
   rhs.Dump(os);
   return os;
 }

 }  // namespace art
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "logging.h"

	#include "base/mutex.h"
	#include "runtime.h"
	#include "thread-inl.h"
	#include "UniquePtr.h"
	#include "utils.h"

	namespace art {

	LogVerbosity gLogVerbosity;

	unsigned int gAborting = 0;

	static LogSeverity gMinimumLogSeverity = INFO;
	static UniquePtr<std::string> gCmdLine;
	static UniquePtr<std::string> gProgramInvocationName;
	static UniquePtr<std::string> gProgramInvocationShortName;

	const char* GetCmdLine() {
	return (gCmdLine.get() != nullptr) ? gCmdLine->c_str() : nullptr;
	}

	const char* ProgramInvocationName() {
	return (gProgramInvocationName.get() != nullptr) ? gProgramInvocationName->c_str() : "art";
	}

	const char* ProgramInvocationShortName() {
	return (gProgramInvocationShortName.get() != nullptr) ? gProgramInvocationShortName->c_str()
	: "art";
	}

	// Configure logging based on ANDROID_LOG_TAGS environment variable.
	// We need to parse a string that looks like
	//
	// *:v jdwp:d dalvikvm:d dalvikvm-gc:i dalvikvmi:i
	//
	// The tag (or '*' for the global level) comes first, followed by a colon
	// and a letter indicating the minimum priority level we're expected to log.
	// This can be used to reveal or conceal logs with specific tags.
	void InitLogging(char* argv[]) {
	if (gCmdLine.get() != nullptr) {
	return;
	}
	// TODO: Move this to a more obvious InitART...
	Locks::Init();

	// Stash the command line for later use. We can use /proc/self/cmdline on Linux to recover this,
	// but we don't have that luxury on the Mac, and there are a couple of argv[0] variants that are
	// commonly used.
	if (argv != NULL) {
	gCmdLine.reset(new std::string(argv[0]));
	for (size_t i = 1; argv[i] != NULL; ++i) {
	gCmdLine->append(" ");
	gCmdLine->append(argv[i]);
	}
	gProgramInvocationName.reset(new std::string(argv[0]));
	const char* last_slash = strrchr(argv[0], '/');
	gProgramInvocationShortName.reset(new std::string((last_slash != NULL) ? last_slash + 1
	: argv[0]));
	} else {
	// TODO: fall back to /proc/self/cmdline when argv is NULL on Linux
	gCmdLine.reset(new std::string("<unset>"));
	}
	const char* tags = getenv("ANDROID_LOG_TAGS");
	if (tags == NULL) {
	return;
	}

	std::vector<std::string> specs;
	Split(tags, ' ', specs);
	for (size_t i = 0; i < specs.size(); ++i) {
	// "tag-pattern:[vdiwefs]"
	std::string spec(specs[i]);
	if (spec.size() == 3 && StartsWith(spec, "*:")) {
	switch (spec[2]) {
	case 'v':
	gMinimumLogSeverity = VERBOSE;
	continue;
	case 'd':
	gMinimumLogSeverity = DEBUG;
	continue;
	case 'i':
	gMinimumLogSeverity = INFO;
	continue;
	case 'w':
	gMinimumLogSeverity = WARNING;
	continue;
	case 'e':
	gMinimumLogSeverity = ERROR;
	continue;
	case 'f':
	gMinimumLogSeverity = FATAL;
	continue;
	// liblog will even suppress FATAL if you say 's' for silent, but that's crazy!
	case 's':
	gMinimumLogSeverity = FATAL;
	continue;
	}
	}
	LOG(FATAL) << "unsupported '" << spec << "' in ANDROID_LOG_TAGS (" << tags << ")";
	}
	}

	LogMessageData::LogMessageData(const char* file, int line, LogSeverity severity, int error)
	: file(file),
	line_number(line),
	severity(severity),
	error(error) {
	const char* last_slash = strrchr(file, '/');
	file = (last_slash == NULL) ? file : last_slash + 1;
	}

	LogMessage::~LogMessage() {
	if (data_->severity < gMinimumLogSeverity) {
	return; // No need to format something we're not going to output.
	}

	// Finish constructing the message.
	if (data_->error != -1) {
	data_->buffer << ": " << strerror(data_->error);
	}
	std::string msg(data_->buffer.str());

	// Do the actual logging with the lock held.
	{
	MutexLock mu(Thread::Current(), *Locks::logging_lock_);
	if (msg.find('\n') == std::string::npos) {
	LogLine(*data_, msg.c_str());
	} else {
	msg += '\n';
	size_t i = 0;
	while (i < msg.size()) {
	size_t nl = msg.find('\n', i);
	msg[nl] = '\0';
	LogLine(*data_, &msg[i]);
	i = nl + 1;
	}
	}
	}

	// Abort if necessary.
	if (data_->severity == FATAL) {
	Runtime::Abort();
	}
	}

	HexDump::HexDump(const void* address, size_t byte_count, bool show_actual_addresses)
	: address_(address), byte_count_(byte_count), show_actual_addresses_(show_actual_addresses) {
	}

	void HexDump::Dump(std::ostream& os) const {
	if (byte_count_ == 0) {
	return;
	}

	if (address_ == NULL) {
	os << "00000000:";
	return;
	}

	static const char gHexDigit[] = "0123456789abcdef";
	const unsigned char* addr = reinterpret_cast<const unsigned char*>(address_);
	char out[76]; /* exact fit */
	unsigned int offset; /* offset to show while printing */

	if (show_actual_addresses_) {
	offset = reinterpret_cast<int>(addr);
	} else {
	offset = 0;
	}
	memset(out, ' ', sizeof(out)-1);
	out[8] = ':';
	out[sizeof(out)-1] = '\0';

	size_t byte_count = byte_count_;
	int gap = static_cast<int>(offset & 0x0f);
	while (byte_count) {
	unsigned int line_offset = offset & ~0x0f;

	char* hex = out;
	char* asc = out + 59;

	for (int i = 0; i < 8; i++) {
	*hex++ = gHexDigit[line_offset >> 28];
	line_offset <<= 4;
	}
	hex++;
	hex++;

	int count = std::min(static_cast<int>(byte_count), 16 - gap);
	CHECK_NE(count, 0);
	CHECK_LE(count + gap, 16);

	if (gap) {
	/* only on first line */
	hex += gap * 3;
	asc += gap;
	}

	int i;
	for (i = gap ; i < count+gap; i++) {
	hex++ = gHexDigit[addr >> 4];
	hex++ = gHexDigit[addr & 0x0f];
	hex++;
	if (addr >= 0x20 && addr < 0x7f /isprint(addr)*/) {
	asc++ = addr;
	} else {
	*asc++ = '.';
	}
	addr++;
	}
	for (; i < 16; i++) {
	/* erase extra stuff; only happens on last line */
	*hex++ = ' ';
	*hex++ = ' ';
	hex++;
	*asc++ = ' ';
	}

	os << out;

	gap = 0;
	byte_count -= count;
	offset += count;
	}
	}

	std::ostream& operator<<(std::ostream& os, const HexDump& rhs) {
	rhs.Dump(os);
	return os;
	}

	} // namespace art