Fix support for distinguishing archive members by timestamp on Darwin.

On Darwin, the binary's symbol table points to debug info in object
files -- potentially object files within a static library. Such a
library may have multiple entries with the same name, distinguished
only by timestamp.

The code was already _attempting_ to handle this case (see the code in
ObjectContainerBSDArchive::Archive::FindObject which disambiguates via
timestamp). But, unfortunately, while the timestamp was taken into
account on the _first_ lookup, the result was then cached in a map
keyed only off of the path.

Added the timestamp to the cache, and added a test case.

Differential Revision: https://reviews.llvm.org/D47660

llvm-svn: 333813

1 files changed, 17 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/macosx/duplicate-archive-members/main.c b/lldb/packages/Python/lldbsuite/test/macosx/duplicate-archive-members/main.c
new file mode 100644
index 00000000000..c5b1cc2f0d1
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/macosx/duplicate-archive-members/main.c
@@ -0,0 +1,17 @@
+//===-- main.c --------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include <stdio.h>
+
+extern int a(int);
+extern int b(int);
+int main (int argc, char const *argv[])
+{
+    printf ("a(1) returns %d\n", a(1));
+    printf ("b(2) returns %d\n", b(2));
+}