/*
* 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.h"
#include "utils.h"
namespace art {
LogVerbosity gLogVerbosity;
unsigned int gAborting = 0;
static LogSeverity gMinimumLogSeverity = INFO;
static std::string* gCmdLine = NULL;
static std::string* gProgramInvocationName = NULL;
static std::string* gProgramInvocationShortName = NULL;
const char* GetCmdLine() {
return (gCmdLine != NULL) ? gCmdLine->c_str() : NULL;
}
const char* ProgramInvocationName() {
return (gProgramInvocationName != NULL) ? gProgramInvocationName->c_str() : "art";
}
const char* ProgramInvocationShortName() {
return (gProgramInvocationShortName != NULL) ? 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 != NULL) {
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 = new std::string(argv[0]);
for (size_t i = 1; argv[i] != NULL; ++i) {
gCmdLine->append(" ");
gCmdLine->append(argv[i]);
}
gProgramInvocationName = new std::string(argv[0]);
const char* last_slash = strrchr(argv[0], '/');
gProgramInvocationShortName = 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 = 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