Compile the LLDB tests out-of-tree.

This patch is the result of a discussion on lldb-dev, see
http://lists.llvm.org/pipermail/lldb-dev/2018-January/013111.html for
background.

For each test (should be eventually: each test configuration) a
separate build directory is created and we execute

  make VPATH=$srcdir/path/to/test -C $builddir/path/to/test -f $srcdir/path/to/test/Makefile -I $srcdir/path/to/test

In order to make this work all LLDB tests need to be updated to find
the executable in the test build directory, since CWD still points at
the test's source directory, which is a requirement for unittest2.

Although we have done extensive testing, I'm expecting that this first
attempt will break a few bots. Please DO NOT HESITATE TO REVERT this
patch in order to get the bots green again. We will likely have to
iterate on this some more.

Differential Revision: https://reviews.llvm.org/D42281

llvm-svn: 323803

3 files changed, 17 insertions, 11 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/settings/TestSettings.py b/lldb/packages/Python/lldbsuite/test/settings/TestSettings.py
index 717c0744b1b..8d68ff865d1 100644
--- a/lldb/packages/Python/lldbsuite/test/settings/TestSettings.py
+++ b/lldb/packages/Python/lldbsuite/test/settings/TestSettings.py
@@ -155,7 +155,7 @@ class SettingsCommandTestCase(TestBase):
         self.runCmd("breakpoint set -n main")
         self.runCmd("run")
         self.expect("thread backtrace",
-                    substrs=["`main", os.getcwd()])
+                    substrs=["`main", self.getSourceDir()])
 
     def test_set_auto_confirm(self):
         """Test that after 'set auto-confirm true', manual confirmation should not kick in."""
@@ -421,8 +421,8 @@ class SettingsCommandTestCase(TestBase):
                     startstr='target.arg0 (string) = "cde"')
         self.runCmd("settings clear target.arg0", check=False)
         # file
-        path1 = os.path.join(os.getcwd(), "path1.txt")
-        path2 = os.path.join(os.getcwd(), "path2.txt")
+        path1 = self.getBuildArtifact("path1.txt")
+        path2 = self.getBuildArtifact("path2.txt")
         self.runCmd(
             "settings set target.output-path %s" %
             path1)   # Set to known value
diff --git a/lldb/packages/Python/lldbsuite/test/settings/quoting/TestQuoting.py b/lldb/packages/Python/lldbsuite/test/settings/quoting/TestQuoting.py
index 54a96710b3d..0bf688a42ed 100644
--- a/lldb/packages/Python/lldbsuite/test/settings/quoting/TestQuoting.py
+++ b/lldb/packages/Python/lldbsuite/test/settings/quoting/TestQuoting.py
@@ -22,7 +22,7 @@ class SettingsCommandTestCase(TestBase):
     @classmethod
     def classCleanup(cls):
         """Cleanup the test byproducts."""
-        cls.RemoveTempFile("stdout.txt")
+        cls.RemoveTempFile(self.getBuildArtifact("stdout.txt"))
 
     @no_debug_info_test
     def test_no_quote(self):
@@ -82,16 +82,22 @@ class SettingsCommandTestCase(TestBase):
         exe = self.getBuildArtifact("a.out")
         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
 
-        self.runCmd("process launch -- " + args_in)
+        local_outfile = self.getBuildArtifact("output.txt")
+        if lldb.remote_platform:
+            remote_outfile = "output.txt" # Relative to platform's PWD
+        else:
+            remote_outfile = local_outfile
+
+        self.runCmd("process launch -- %s %s" %(remote_outfile, args_in))
 
         if lldb.remote_platform:
-            src_file_spec = lldb.SBFileSpec('output.txt', False)
-            dst_file_spec = lldb.SBFileSpec('output.txt', True)
+            src_file_spec = lldb.SBFileSpec(remote_outfile, False)
+            dst_file_spec = lldb.SBFileSpec(local_outfile, True)
             lldb.remote_platform.Get(src_file_spec, dst_file_spec)
 
-        with open('output.txt', 'r') as f:
+        with open(local_outfile, 'r') as f:
             output = f.read()
 
-        self.RemoveTempFile("output.txt")
+        self.RemoveTempFile(local_outfile)
 
         self.assertEqual(output, args_out)
diff --git a/lldb/packages/Python/lldbsuite/test/settings/quoting/main.c b/lldb/packages/Python/lldbsuite/test/settings/quoting/main.c
index 5e3e34f84a6..2ebaa142bc5 100644
--- a/lldb/packages/Python/lldbsuite/test/settings/quoting/main.c
+++ b/lldb/packages/Python/lldbsuite/test/settings/quoting/main.c
@@ -8,11 +8,11 @@ main(int argc, char const *argv[])
 {
     int i;
 
-    FILE *output = fopen ("output.txt", "w");
+    FILE *output = fopen (argv[1], "w");
     if (output == NULL)
         exit (1);
 
-    for (i = 1; i < argc; ++i)
+    for (i = 2; i < argc; ++i)
         fwrite(argv[i], strlen(argv[i])+1, 1, output);
 
     fclose (output);