[ASan] Close stderr before launching atos in asan_symbolize.py
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185631 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/scripts/asan_symbolize.py b/lib/asan/scripts/asan_symbolize.py
index 81c9b96..3571468 100755
--- a/lib/asan/scripts/asan_symbolize.py
+++ b/lib/asan/scripts/asan_symbolize.py
@@ -142,10 +142,13 @@
Wrap a child process that responds to each line of input with one line of
output. Uses pty to trick the child into providing unbuffered output.
"""
- def __init__(self, args):
+ def __init__(self, args, close_stderr=False):
pid, fd = pty.fork()
if pid == 0:
- # We're the child. Transfer control to command.
+ # We're the child. Transfer control to command.
+ if close_stderr:
+ dev_null = os.open('/dev/null', 0)
+ os.dup2(dev_null, 2)
os.execvp(args[0], args)
else:
# Disable echoing.
@@ -179,7 +182,7 @@
if DEBUG:
print 'atos -o %s -arch %s' % (self.binary, self.arch)
cmdline = ['atos', '-o', self.binary, '-arch', self.arch]
- self.atos = UnbufferedLineConverter(cmdline)
+ self.atos = UnbufferedLineConverter(cmdline, close_stderr=True)
def symbolize(self, addr, binary, offset):
"""Overrides Symbolizer.symbolize."""
