1 files changed, 90 insertions, 0 deletions
diff --git a/tools/jvmti-agents/ti-alloc-sample/mkflame.py b/tools/jvmti-agents/ti-alloc-sample/mkflame.py
new file mode 100755
index 0000000000..8f1dccfd99
--- /dev/null
+++ b/tools/jvmti-agents/ti-alloc-sample/mkflame.py
@@ -0,0 +1,90 @@
+#!/usr/bin/python3
+#
+# Copyright 2019, 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.
+
+"""
+Usage: mkflame.py <jvmti_trace_file>
+"""
+
+import sys
+
+table = {}
+
+def add_definition_to_table(line):
+  """
+  Adds line to the list of definitions in table.
+  """
+  comma_pos = line.find(",")
+  index = int(line[1:comma_pos])
+  definition = line[comma_pos+1:]
+  if line[0:1] == "=":
+    # Skip the type/size prefix for flame graphs.
+    semi_pos = definition.find(";")
+    definition = definition[semi_pos + 1:]
+    # Expand stack frame definitions to be a semicolon-separated list of stack
+    # frame methods.
+    expanded_definition = ""
+    while definition != "":
+      semi_pos = definition.find(";")
+      if semi_pos == -1:
+        method_index = int(definition)
+        definition = ""
+      else:
+        method_index = int(definition[:semi_pos])
+        definition = definition[semi_pos + 1:]
+      # Replace semicolons by colons in the method entry signatures.
+      method = lookup_definition(method_index).replace(";", ":")
+      expanded_definition += ";" + method
+    definition = expanded_definition
+  table[index] = definition
+
+def lookup_definition(index):
+  """
+  Returns the definition for "index" from table.
+  """
+  return table[index]
+
+traces = {}
+def record_stack_trace(string):
+  """
+  Remembers one stack trace index in the list of stack traces we have seen.
+  Remembering a stack trace increments a count associated with the trace.
+  """
+  index = int(string)
+  if index in traces:
+    count = traces[index]
+    traces[index] = count + 1
+  else:
+    traces[index] = 1
+
+def main(argv):
+  filename = argv[1]
+  pagefile = open(filename, "r")
+  current_allocation_trace = ""
+  for line in pagefile:
+    args = line.split()
+    line = line.rstrip("\n")
+    if line[0:1] == "=" or line[0:1] == "+":
+      # definition.
+      add_definition_to_table(line)
+    else:
+      # stack trace.
+      record_stack_trace(line)
+  # Dump all the traces, with count.
+  for k, v in traces.items():
+    print(lookup_definition(k) + " " + str(v))
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))