[LNT] r292527 - Builds are not clean between repeated runs

[A Bergen via llvm-commits]

Author: sudofortune
Date: Thu Jan 19 16:34:50 2017
New Revision: 292527

URL: http://llvm.org/viewvc/llvm-project?rev=292527&view=rev
Log:
Builds are not clean between repeated runs

Motivation:
When doing a compile multiple times in a row only the first build is actually happening.
All subsequent runs to build do nothing as make detects that none of the files have changed.

What changed:
This deletes the entire build directory before each compile happens, thereby ensuring that each run has a clean build.
Since the build directory is deleted before the compile, the "last" build directory is kept. In case there is a failure this build directory can be used to look at what happened.

To delete the build directory I am using the -p flag of runN to perform the cleaning before the timing run.
Differential Revision: https://reviews.llvm.org/D28882

Modified:
    lnt/trunk/lnt/tests/compile.py

Modified: lnt/trunk/lnt/tests/compile.py
URL: http://llvm.org/viewvc/llvm-project/lnt/trunk/lnt/tests/compile.py?rev=292527&r1=292526&r2=292527&view=diff
==============================================================================
--- lnt/trunk/lnt/tests/compile.py (original)
+++ lnt/trunk/lnt/tests/compile.py Thu Jan 19 16:34:50 2017
@@ -53,6 +53,7 @@ def runN(args, N, cwd, preprocess_cmd=No
     FIXME: Figure out a better way to deal with need to run as root. Maybe farm
     memory sampling process out into something we can setuid? Eek.
     """
+    g_log.info("preprocess_cmd at top of runN: %s:", preprocess_cmd)
     cmd = ['runN', '-a']
     if sample_mem:
         cmd = ['sudo'] + cmd + ['-m']
@@ -473,6 +474,9 @@ def test_build(base_name, run_info, vari
         # Set build base to copied_src_dir so that if codesize_util
         # is not None, we pass it the correct path.
         build_base = copied_src_dir
+        preprocess_cmd = 'rm -rf "%s"/build' % (build_base,)
+        g_log.info('preprocess_cmd: %s' % preprocess_cmd)
+
     else:
         fatal("unknown build style in project: %r" % project)