test: shorten test trace file names

Make sure we don't generate extremely long file names for test trace log
file, as this can cause path-too-long errors. As the compilers in the
android ndk are deeply nested, it's very easy to trigger these.

I chose to output at most 4 path components -- this should keep the full
path for common cases like /usr/bin/gcc with room to spare, and should
be enough to uniquely identify the compiler for more deeply nested
cases.

llvm-svn: 296870

1 files changed, 5 insertions, 2 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index f4f12a76a3b..078f1e83f53 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -1119,8 +1119,11 @@ class Base(unittest2.TestCase):
                     compiler = compiler[2:]
                 if os.path.altsep is not None:
                     compiler = compiler.replace(os.path.altsep, os.path.sep)
-                components.extend(
-                    [x for x in compiler.split(os.path.sep) if x != ""])
+                path_components = [x for x in compiler.split(os.path.sep) if x != ""]
+
+                # Add at most 4 path components to avoid generating very long
+                # filenames
+                components.extend(path_components[-4:])
             elif c == 'a':
                 components.append(self.getArchitecture())
             elif c == 'm':