Reduce emulator logspam
The emulator doesn't support systrace, but we should point that out
at most once per process.
Bug 7436352
Change-Id: I06b2c1ea0df6c02c11cd2496423c337f8d7c62a1
diff --git a/include/utils/Trace.h b/include/utils/Trace.h
index 93e2285..41bce00 100644
--- a/include/utils/Trace.h
+++ b/include/utils/Trace.h
@@ -54,6 +54,8 @@
#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
diff --git a/libs/utils/Trace.cpp b/libs/utils/Trace.cpp
index 5cd5731..f5aaea3 100644
--- a/libs/utils/Trace.cpp
+++ b/libs/utils/Trace.cpp
@@ -25,7 +25,7 @@
volatile int32_t Tracer::sIsReady = 0;
int Tracer::sTraceFD = -1;
-uint64_t Tracer::sEnabledTags = 0;
+uint64_t Tracer::sEnabledTags = ATRACE_TAG_NOT_READY;
Mutex Tracer::sMutex;
void Tracer::changeCallback() {
@@ -46,7 +46,7 @@
sTraceFD = open(traceFileName, O_WRONLY);
if (sTraceFD == -1) {
ALOGE("error opening trace file: %s (%d)", strerror(errno), errno);
- // sEnabledTags remains zero indicating that no tracing can occur
+ sEnabledTags = 0; // no tracing can occur
} else {
loadSystemProperty();
}