Disable -check_heap_mismatch for 64-bit Dr. Memory

tools/valgrind/valgrind_test.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Runs an exe through Valgrind and puts the intermediate files in a
 directory.
 """
 
 import datetime
 import glob
@@ skipping 701 matching lines @@
     # disable leak scan for now
     proc += ["-no_count_leaks", "-no_leak_scan"]
 
     # disable warnings about unaddressable prefetches
     proc += ["-no_check_prefetch"]
 
     # crbug.com/413215, no heap mismatch check for Windows release build binary
     if common.IsWindows() and "Release" in self._options.build_dir:
         proc += ["-no_check_delete_mismatch"]
 
+    # We are seeing false positive invalid heap args on 64-bit, so we are
+    # disabling the feature for now (xref
+    # https://github.com/DynamoRIO/drmemory/issues/1839).
+    if common.IsWindows() and "Release_x64" in self._options.build_dir:
+        proc += ["-no_check_heap_mismatch"]
+
     # make callstacks easier to read
     proc += ["-callstack_srcfile_prefix",
              "build\\src,chromium\\src,crt_build\\self_x86"]
     proc += ["-callstack_modname_hide",
              "*drmemory*,chrome.dll"]
 
     boring_callers = common.BoringCallers(mangled=False, use_re_wildcards=False)
     # TODO(timurrrr): In fact, we want "starting from .." instead of "below .."
     proc += ["-callstack_truncate_below", ",".join(boring_callers)]
 
@@ skipping 93 matching lines @@
       return DrMemory(False, True)
     try:
       platform_name = common.PlatformNames()[0]
     except common.NotImplementedError:
       platform_name = sys.platform + "(Unknown)"
     raise RuntimeError, "Unknown tool (tool=%s, platform=%s)" % (tool_name,
                                                                  platform_name)
 
 def CreateTool(tool):
   return ToolFactory().Create(tool)