Perf profile collection daemon.
Collects system-wide profiles via periodic invocation of
/system/bin/perf, placing the resulting data files in a destination
directory selected via config file. Behavior of the daemon, e.g how
often to profile, duration of profiling runs, etc, can also be
controlled with config file settings.
Change-Id: I7978cab62aa0c2507ecf8d70ba073e77db730120
diff --git a/perfprofd/perfprofdcore.h b/perfprofd/perfprofdcore.h
new file mode 100644
index 0000000..1bff9ba
--- /dev/null
+++ b/perfprofd/perfprofdcore.h
@@ -0,0 +1,56 @@
+/*
+**
+** Copyright 2015, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+// Semaphore file that indicates that the user is opting in
+#define SEMAPHORE_FILENAME "perf_profile_collection_enabled.txt"
+
+// Main routine for perfprofd daemon
+extern int perfprofd_main(int argc, char **argv);
+
+//
+// This enumeration holds the results of what happened when on an
+// attempted perf profiling run.
+//
+typedef enum {
+
+ // Success
+ OK_PROFILE_COLLECTION,
+
+ // Fork system call failed (lo mem?)
+ ERR_FORK_FAILED,
+
+ // Perf ran but crashed or returned a bad exit status
+ ERR_PERF_RECORD_FAILED,
+
+ // The perf.data encoding process failed somehow
+ ERR_PERF_ENCODE_FAILED,
+
+ // We tried to open the output file perf.data.encoded but the open failed
+ ERR_OPEN_ENCODED_FILE_FAILED,
+
+ // Error while writing perf.data.encoded
+ ERR_WRITE_ENCODED_FILE_FAILED
+} PROFILE_RESULT;
+
+//
+// Given a full path to a perf.data file specified by "data_file_path",
+// read/summarize/encode the contents into a new file specified
+// by "encoded_file_path". Return status indicates whether the operation
+// was successful (either OK_PROFILE_COLLECTION or an error of some sort).
+//
+PROFILE_RESULT encode_to_proto(const std::string &data_file_path,
+ const std::string &encoded_file_path);