Clean up the sampling profiler

- rename variables/fields names to match the code style (use
_underscore_names_)
- extract common property parsing in utils.cc
- fail to load profile file if any line is malformed
- added ProfileFile to manage the profile data generate in the previous
runs (replaces ProfileHelper and nests ProfileData)

Bug: 12877748
Change-Id: Ie7bda30bfdeb7e78534c986615b0649eac12a97b

1 files changed, 19 insertions, 0 deletions

diff --git a/runtime/utils.cc b/runtime/utils.cc
index f562252823..05ff5ffbdf 100644
--- a/runtime/utils.cc
+++ b/runtime/utils.cc
@@ -1302,4 +1302,23 @@ bool Exec(std::vector<std::string>& arg_vector, std::string* error_msg) {
   return true;
 }
 
+double GetDoubleProperty(const char* property, double min_value, double max_value, double default_value) {
+#ifndef HAVE_ANDROID_OS
+  return default_value;
+#else
+  char buf[PROP_VALUE_MAX];
+  char* endptr;
+
+  property_get(property, buf, "");
+  double value = strtod(buf, &endptr);
+
+  // Return the defalt value if the string is invalid or the value is outside the given range
+  if ((value == 0 && endptr == buf)                     // Invalid string
+      || (value < min_value) || (value > max_value)) {  // Out of range value
+    return default_value;
+  }
+  return value;
+#endif
+}
+
 }  // namespace art