1 files changed, 235 insertions, 0 deletions
diff --git a/runtime/base/logging.cc b/runtime/base/logging.cc
new file mode 100644
index 000000000..2c6b6a8ce
--- /dev/null
+++ b/runtime/base/logging.cc
@@ -0,0 +1,235 @@
+/*
+ * 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();
+  }
+
+  delete data_;
+}
+
+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