Bug 1014382 - Add nm-symbolicate.py helper script. r=jrmuizel DONTBUILD as NPOTB

tools/profiler/nm-symbolicate.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import sys, subprocess
+
+def NMSymbolicate(library, addresses):
+  args = [
+    "nm", "-D", "-S", library
+  ]
+  nm_lines = subprocess.check_output(args).split("\n")
+  symbol_table = []
+  for line in nm_lines:
+    pieces = line.split(" ", 4)
+    if len(pieces) != 4 or pieces[2] != "T":
+      continue
+    start = int(pieces[0], 16)
+    end = int(pieces[1], 16)
+    symbol = pieces[3]
+    symbol_table.append({
+      "start": int(pieces[0], 16),
+      "end": int(pieces[0], 16) + int(pieces[1], 16),
+      "funcName": pieces[3]
+    });
+
+  for addressStr in addresses:
+    address = int(addressStr, 16)
+    symbolForAddress = None
+    for symbol in symbol_table:
+      if address >= symbol["start"] and address <= symbol["end"]:
+        symbolForAddress = symbol
+        break
+    if symbolForAddress:
+      print symbolForAddress["funcName"]
+    else:
+      print "??" # match addr2line
+    print ":0" # no line information from nm
+
+if len(sys.argv) > 1:
+    NMSymbolicate(sys.argv[1], sys.argv[2:])
+    sys.exit(0)
+
+print "Usage: nm-symbolicate.py <library> <addresses> > merged.sym"
+
+