1 files changed, 87 insertions, 0 deletions
diff --git a/mozglue/linker/Logging.h b/mozglue/linker/Logging.h
new file mode 100644
index 0000000000..046d918f4a
--- /dev/null
+++ b/mozglue/linker/Logging.h
@@ -0,0 +1,87 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef Logging_h
+#define Logging_h
+
+#include "mozilla/Likely.h"
+
+#ifdef ANDROID
+#include <android/log.h>
+#define LOG(...) __android_log_print(ANDROID_LOG_INFO, "GeckoLinker", __VA_ARGS__)
+#define WARN(...) __android_log_print(ANDROID_LOG_WARN, "GeckoLinker", __VA_ARGS__)
+#define ERROR(...) __android_log_print(ANDROID_LOG_ERROR, "GeckoLinker", __VA_ARGS__)
+#else
+#include <cstdio>
+
+/* Expand to 1 or m depending on whether there is one argument or more
+ * given. */
+#define MOZ_ONE_OR_MORE_ARGS_IMPL2(_1, _2, _3, _4, _5, _6, _7, _8, _9, N, ...) \
+  N
+#define MOZ_ONE_OR_MORE_ARGS_IMPL(args) MOZ_ONE_OR_MORE_ARGS_IMPL2 args
+#define MOZ_ONE_OR_MORE_ARGS(...) \
+  MOZ_ONE_OR_MORE_ARGS_IMPL((__VA_ARGS__, m, m, m, m, m, m, m, m, 1, 0))
+
+#define MOZ_MACRO_GLUE(a, b) a b
+#define MOZ_CONCAT2(a, b) a ## b
+#define MOZ_CONCAT1(a, b) MOZ_CONCAT2(a, b)
+#define MOZ_CONCAT(a, b) MOZ_CONCAT1(a, b)
+
+/* Some magic to choose between LOG1 and LOGm depending on the number of
+ * arguments */
+#define MOZ_CHOOSE_LOG(...) \
+  MOZ_MACRO_GLUE(MOZ_CONCAT(LOG, MOZ_ONE_OR_MORE_ARGS(__VA_ARGS__)), \
+                 (__VA_ARGS__))
+
+#define LOG1(format) fprintf(stderr, format "\n")
+#define LOGm(format, ...) fprintf(stderr, format "\n", __VA_ARGS__)
+#define LOG(...) MOZ_CHOOSE_LOG(__VA_ARGS__)
+#define WARN(...) MOZ_CHOOSE_LOG("Warning: " __VA_ARGS__)
+#define ERROR(...) MOZ_CHOOSE_LOG("Error: " __VA_ARGS__)
+
+#endif
+
+class Logging
+{
+public:
+  static bool isVerbose()
+  {
+    return Singleton.verbose;
+  }
+
+private:
+  bool verbose;
+
+public:
+  static void Init()
+  {
+    const char *env = getenv("MOZ_DEBUG_LINKER");
+    if (env && *env == '1')
+      Singleton.verbose = true;
+  }
+
+private:
+  static Logging Singleton;
+};
+
+#define DEBUG_LOG(...)   \
+  do {                   \
+    if (MOZ_UNLIKELY(Logging::isVerbose())) {  \
+      LOG(__VA_ARGS__);  \
+    }                    \
+  } while(0)
+
+#if defined(__LP64__)
+#  define PRIxAddr "lx"
+#  define PRIxSize "lx"
+#  define PRIdSize "ld"
+#  define PRIuSize "lu"
+#else
+#  define PRIxAddr "x"
+#  define PRIxSize "x"
+#  define PRIdSize "d"
+#  define PRIuSize "u"
+#endif
+
+#endif /* Logging_h */