Initial patchset to get the testsuite running against armv7 and arm64 iOS devices.

Normal customer devices won't be able to run these devices, we're hoping to get
a public facing bot set up at some point.

There will be some smaller follow-on patches.  The changes to tools/lldb-server are
verbose and I'm not thrilled with having to skip all of these tests manually.
There are a few places where I'm making the assumption that "armv7", "armv7k", "arm64"
means it's an ios device, and I need to review & clean these up with an OS check
as well.  (Android will show up as "arm" and "aarch64" so by pure luck they shouldn't
cause problems, but it's not an assumption I want to rely on).

I'll be watching the bots for the rest of today; if any problems are introduced by
this patch I'll revert it - if anyone sees a problem with their bot that I don't
see, please do the same.  I know it's a rather large patch.

One change I had to make specifically for iOS devices was that debugserver can't 
create files.  There were several tests that launch the inferior process redirecting
its output to a file, then they retrieve the file.  They were not trying to test
file redirection in these tests, so I rewrote those to write their output to a file
directly.

llvm-svn: 313932

1 files changed, 10 insertions, 2 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/call-function/TestCallStdStringFunction.py b/lldb/packages/Python/lldbsuite/test/expression_command/call-function/TestCallStdStringFunction.py
index a2d149f4b49..16736f79852 100644
--- a/lldb/packages/Python/lldbsuite/test/expression_command/call-function/TestCallStdStringFunction.py
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/call-function/TestCallStdStringFunction.py
@@ -44,5 +44,13 @@ class ExprCommandCallFunctionTestCase(TestBase):
 
         # Calling this function now succeeds, but we follow the typedef return type through to
         # const char *, and thus don't invoke the Summary formatter.
-        self.expect("print str.c_str()",
-                    substrs=['Hello world'])
+
+        # clang's libstdc++ on ios arm64 inlines std::string::c_str() always; 
+        # skip this part of the test.
+        triple = self.dbg.GetSelectedPlatform().GetTriple()
+        do_cstr_test = True
+        if triple == "arm64-apple-ios" or triple == "arm64-apple-tvos" or triple == "armv7k-apple-watchos" or triple == "arm64-apple-bridgeos":
+            do_cstr_test = False
+        if do_cstr_test:
+            self.expect("print str.c_str()",
+                        substrs=['Hello world'])