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-rw-r--r--core/jni/android_tracing_PerfettoDataSource.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/core/jni/android_tracing_PerfettoDataSource.cpp b/core/jni/android_tracing_PerfettoDataSource.cpp
index ea896e1678a7..56ee3dcf7ca5 100644
--- a/core/jni/android_tracing_PerfettoDataSource.cpp
+++ b/core/jni/android_tracing_PerfettoDataSource.cpp
@@ -96,6 +96,9 @@ jobject PerfettoDataSource::newInstance(JNIEnv* env, void* ds_config, size_t ds_
bool PerfettoDataSource::TraceIterateBegin() {
if (gInIteration) {
+ ALOG(LOG_ERROR, LOG_TAG,
+ "Tried calling TraceIterateBegin with an already active iterator for datasource %s.",
+ dataSourceName.c_str());
return false;
}