utils: Use cutils tracing functionality.

Tracing functionality has moved to cutils.

Change-Id: Ie78ccc1d59dd5178f5058fbc3858a37f9adce552

1 files changed, 9 insertions, 141 deletions

diff --git a/include/utils/Trace.h b/include/utils/Trace.h
index 41bce00..940aec1 100644
--- a/include/utils/Trace.h
+++ b/include/utils/Trace.h
@@ -27,42 +27,9 @@
 
 #include <cutils/compiler.h>
 #include <utils/threads.h>
+#include <cutils/trace.h>
 
-// The ATRACE_TAG macro can be defined before including this header to trace
-// using one of the tags defined below.  It must be defined to one of the
-// following ATRACE_TAG_* macros.  The trace tag is used to filter tracing in
-// userland to avoid some of the runtime cost of tracing when it is not desired.
-//
-// Defining ATRACE_TAG to be ATRACE_TAG_ALWAYS will result in the tracing always
-// being enabled - this should ONLY be done for debug code, as userland tracing
-// has a performance cost even when the trace is not being recorded.  Defining
-// ATRACE_TAG to be ATRACE_TAG_NEVER or leaving ATRACE_TAG undefined will result
-// in the tracing always being disabled.
-//
-// These tags must be kept in sync with frameworks/base/core/java/android/os/Trace.java.
-#define ATRACE_TAG_NEVER            0       // The "never" tag is never enabled.
-#define ATRACE_TAG_ALWAYS           (1<<0)  // The "always" tag is always enabled.
-#define ATRACE_TAG_GRAPHICS         (1<<1)
-#define ATRACE_TAG_INPUT            (1<<2)
-#define ATRACE_TAG_VIEW             (1<<3)
-#define ATRACE_TAG_WEBVIEW          (1<<4)
-#define ATRACE_TAG_WINDOW_MANAGER   (1<<5)
-#define ATRACE_TAG_ACTIVITY_MANAGER (1<<6)
-#define ATRACE_TAG_SYNC_MANAGER     (1<<7)
-#define ATRACE_TAG_AUDIO            (1<<8)
-#define ATRACE_TAG_VIDEO            (1<<9)
-#define ATRACE_TAG_CAMERA           (1<<10)
-#define ATRACE_TAG_LAST             ATRACE_TAG_CAMERA
-
-#define ATRACE_TAG_NOT_READY        (1LL<<63)   // Reserved for use during init
-
-#define ATRACE_TAG_VALID_MASK ((ATRACE_TAG_LAST - 1) | ATRACE_TAG_LAST)
-
-#ifndef ATRACE_TAG
-#define ATRACE_TAG ATRACE_TAG_NEVER
-#elif ATRACE_TAG > ATRACE_TAG_LAST
-#error ATRACE_TAG must be defined to be one of the tags defined in utils/Trace.h
-#endif
+// See <cutils/trace.h> for more ATRACE_* macros.
 
 // ATRACE_CALL traces the beginning and end of the current function.  To trace
 // the correct start and end times this macro should be the first line of the
@@ -74,119 +41,20 @@
 // function body.
 #define ATRACE_NAME(name) android::ScopedTrace ___tracer(ATRACE_TAG, name)
 
-// ATRACE_INT traces a named integer value.  This can be used to track how the
-// value changes over time in a trace.
-#define ATRACE_INT(name, value) android::Tracer::traceCounter(ATRACE_TAG, name, value)
-
-// ATRACE_ENABLED returns true if the trace tag is enabled.  It can be used as a
-// guard condition around more expensive trace calculations.
-#define ATRACE_ENABLED() android::Tracer::isTagEnabled(ATRACE_TAG)
-
 namespace android {
 
-class Tracer {
-
-public:
-
-    static uint64_t getEnabledTags() {
-        initIfNeeded();
-        return sEnabledTags;
-    }
-
-    static inline bool isTagEnabled(uint64_t tag) {
-        initIfNeeded();
-        return sEnabledTags & tag;
-    }
-
-    static inline void traceCounter(uint64_t tag, const char* name,
-            int32_t value) {
-        if (CC_UNLIKELY(isTagEnabled(tag))) {
-            char buf[1024];
-            snprintf(buf, 1024, "C|%d|%s|%d", getpid(), name, value);
-            write(sTraceFD, buf, strlen(buf));
-        }
-    }
-
-    static inline void traceBegin(uint64_t tag, const char* name) {
-        if (CC_UNLIKELY(isTagEnabled(tag))) {
-            char buf[1024];
-            size_t len = snprintf(buf, 1024, "B|%d|%s", getpid(), name);
-            write(sTraceFD, buf, len);
-        }
-    }
-
-   static inline void traceEnd(uint64_t tag) {
-        if (CC_UNLIKELY(isTagEnabled(tag))) {
-            char buf = 'E';
-            write(sTraceFD, &buf, 1);
-        }
-    }
-
-private:
-
-    static inline void initIfNeeded() {
-        if (!android_atomic_acquire_load(&sIsReady)) {
-            init();
-        }
-    }
-
-    static void changeCallback();
-
-    // init opens the trace marker file for writing and reads the
-    // atrace.tags.enableflags system property.  It does this only the first
-    // time it is run, using sMutex for synchronization.
-    static void init();
-
-    // retrieve the current value of the system property.
-    static void loadSystemProperty();
-
-    // sIsReady is a boolean value indicating whether a call to init() has
-    // completed in this process.  It is initialized to 0 and set to 1 when the
-    // first init() call completes.  It is set to 1 even if a failure occurred
-    // in init (e.g. the trace marker file couldn't be opened).
-    //
-    // This should be checked by all tracing functions using an atomic acquire
-    // load operation before calling init().  This check avoids the need to lock
-    // a mutex each time a trace function gets called.
-    static volatile int32_t sIsReady;
-
-    // sTraceFD is the file descriptor used to write to the kernel's trace
-    // buffer.  It is initialized to -1 and set to an open file descriptor in
-    // init() while a lock on sMutex is held.
-    //
-    // This should only be used by a trace function after init() has
-    // successfully completed.
-    static int sTraceFD;
-
-    // sEnabledTags is the set of tag bits for which tracing is currently
-    // enabled.  It is initialized to 0 and set based on the
-    // atrace.tags.enableflags system property in init() while a lock on sMutex
-    // is held.
-    //
-    // This should only be used by a trace function after init() has
-    // successfully completed.
-    //
-    // This value is only ever non-zero when tracing is initialized and sTraceFD is not -1.
-    static uint64_t sEnabledTags;
-
-    // sMutex is used to protect the execution of init().
-    static Mutex sMutex;
-};
-
 class ScopedTrace {
-
 public:
-    inline ScopedTrace(uint64_t tag, const char* name) :
-            mTag(tag) {
-        Tracer::traceBegin(mTag, name);
-    }
+inline ScopedTrace(uint64_t tag, const char* name)
+    : mTag(tag) {
+    atrace_begin(mTag,name);
+}
 
-    inline ~ScopedTrace() {
-        Tracer::traceEnd(mTag);
-    }
+inline ~ScopedTrace() {
+    atrace_end(mTag);
+}
 
 private:
-
     uint64_t mTag;
 };