1 files changed, 4 insertions, 0 deletions
diff --git a/simpleperf/environment.h b/simpleperf/environment.h
index 6d81e981..6547862f 100644
--- a/simpleperf/environment.h
+++ b/simpleperf/environment.h
@@ -18,6 +18,7 @@
 #define SIMPLE_PERF_ENVIRONMENT_H_
 
 #include <functional>
+#include <set>
 #include <string>
 #include <vector>
 
@@ -68,6 +69,9 @@ static const char* DEFAULT_KERNEL_FILENAME_FOR_BUILD_ID = "[kernel.kallsyms]";
 bool GetKernelBuildId(BuildId* build_id);
 bool GetModuleBuildId(const std::string& module_name, BuildId* build_id);
 
+bool GetValidThreadsFromProcessString(const std::string& pid_str, std::set<pid_t>* tid_set);
+bool GetValidThreadsFromThreadString(const std::string& tid_str, std::set<pid_t>* tid_set);
+
 // Expose the following functions for unit tests.
 std::vector<int> GetOnlineCpusFromString(const std::string& s);