From 62da3c4bd49354646f31a18e74c0f26a088c5711 Mon Sep 17 00:00:00 2001
From: Chris Bieneman <beanz@apple.com>
Date: Tue, 22 Mar 2016 02:55:40 +0000
Subject: [PATCH] [Perf-training] Fixing an issue with multi-threading PGO
generation
When LIT parallelizes the profraw file generation we need to generate unique temp filenames then clean them up after the driver executes.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@264021 91177308-0d34-0410-b5e6-96231b3b80d8
---
utils/perf-training/perf-helper.py | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/utils/perf-training/perf-helper.py b/utils/perf-training/perf-helper.py
index 19f3819b301..3fd1c0bb7c9 100644
--- a/utils/perf-training/perf-helper.py
+++ b/utils/perf-training/perf-helper.py
@@ -16,6 +16,7 @@ import argparse
import time
import bisect
import shlex
+import tempfile
test_env = { 'PATH' : os.environ['PATH'] }
@@ -149,10 +150,12 @@ def cc1(args):
# clear the profile file env, so that we don't generate profdata
# when capturing the cc1 command
+ handle, profraw_file = tempfile.mkstemp()
+ os.close(handle)
cc1_env = test_env
- cc1_env["LLVM_PROFILE_FILE"] = "driver.prfraw"
+ cc1_env["LLVM_PROFILE_FILE"] = profraw_file
cc1_cmd = get_cc1_command_for_args(cmd, cc1_env)
- os.remove("driver.prfraw")
+ os.remove(profraw_file)
subprocess.check_call(cc1_cmd)
return 0;
--
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