Repo created

TMessagesProj/jni/voip/webrtc/third_party/jni_zero/logging.cc

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+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "third_party/jni_zero/logging.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <atomic>
+#include <memory>
+#ifndef JNI_ZERO_IS_ROBOLECTRIC
+#include <android/log.h>
+#endif
+
+namespace jni_zero {
+
+std::atomic<LogMessageCallback> g_log_callback{};
+
+void SetLogMessageCallback(LogMessageCallback callback) {
+  g_log_callback.store(callback, std::memory_order_relaxed);
+}
+
+void LogMessage(LogLev level,
+                const char* fname,
+                int line,
+                const char* fmt,
+                ...) {
+  char stack_buf[512];
+  std::unique_ptr<char[]> large_buf;
+  char* log_msg = &stack_buf[0];
+
+  // By default use a stack allocated buffer because most log messages are quite
+  // short. In rare cases they can be larger (e.g. --help). In those cases we
+  // pay the cost of allocating the buffer on the heap.
+  for (size_t max_len = sizeof(stack_buf);;) {
+    va_list args;
+    va_start(args, fmt);
+    int res = vsnprintf(log_msg, max_len, fmt, args);
+    va_end(args);
+
+    // If for any reason the print fails, overwrite the message but still print
+    // it. The code below will attach the filename and line, which is still
+    // useful.
+    if (res < 0) {
+      snprintf(log_msg, max_len, "%s", "[printf format error]");
+      break;
+    }
+    // if res == max_len, vsnprintf saturated the input buffer. Retry with a
+    // larger buffer in that case (within reasonable limits).
+    if (res < static_cast<int>(max_len) || max_len >= 128 * 1024) {
+      break;
+    }
+
+    max_len *= 4;
+    large_buf.reset(new char[max_len]);
+    log_msg = &large_buf[0];
+  }
+
+  LogMessageCallback cb = g_log_callback.load(std::memory_order_relaxed);
+  if (cb) {
+    cb({level, line, fname, log_msg});
+    return;
+  }
+
+#ifdef JNI_ZERO_IS_ROBOLECTRIC
+  fprintf(stderr, "%s:%d %s\n", fname, line, log_msg);
+#else
+  __android_log_print(int{ANDROID_LOG_DEBUG} + level, "jni_zero", "%s:%d %s",
+                      fname, line, log_msg);
+#endif
+  if (level >= kLogFatal) {
+    JNI_ZERO_IMMEDIATE_CRASH();
+  }
+}
+
+}  // namespace jni_zero