1 files changed, 21 insertions, 0 deletions
diff --git a/runtime/utils.h b/runtime/utils.h
index 5b9e963919..153749eff4 100644
--- a/runtime/utils.h
+++ b/runtime/utils.h
@@ -99,6 +99,18 @@ static inline bool NeedsEscaping(uint16_t ch) {
   return (ch < ' ' || ch > '~');
 }
 
+template <typename T> T SafeAbs(T value) {
+  // std::abs has undefined behavior on min limits.
+  DCHECK_NE(value, std::numeric_limits<T>::min());
+  return std::abs(value);
+}
+
+template <typename T> T AbsOrMin(T value) {
+  return (value == std::numeric_limits<T>::min())
+      ? value
+      : std::abs(value);
+}
+
 std::string PrintableChar(uint16_t ch);
 
 // Returns an ASCII string corresponding to the given UTF-8 string.
@@ -276,6 +288,9 @@ std::string GetSystemImageFilename(const char* location, InstructionSet isa);
 // Wrapper on fork/execv to run a command in a subprocess.
 bool Exec(std::vector<std::string>& arg_vector, std::string* error_msg);
 
+// Returns true if the file exists.
+bool FileExists(const std::string& filename);
+
 class VoidFunctor {
  public:
   template <typename A>
@@ -367,6 +382,12 @@ T GetRandomNumber(T min, T max) {
   return dist(rng);
 }
 
+// Return the file size in bytes or -1 if the file does not exists.
+int64_t GetFileSizeBytes(const std::string& filename);
+
+// Sleep forever and never come back.
+NO_RETURN void SleepForever();
+
 }  // namespace art
 
 #endif  // ART_RUNTIME_UTILS_H_