Fix a test broken by r216564.

llgs Linux is no longer doing the translation to some gdb fixed signal
numbers.  This change modifies the test method to take in the signo
expected for a segfault.  The debugserver test uses the fixed gdb number,
and everything else uses signal.SIGSEGV for the platform.

Sidenote: I somehow did not see this reported in multicore tests.
I will need to verify that we aren't missing test failures in that
script.  I need to verify why this wasn't more obvious with
test/dosep.py.

llvm-svn: 216770

lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py

@@ -13,6 +13,7 @@ the initial set of tests implemented.
 import gdbremote_testcase
 import lldbgdbserverutils
 import platform
+import signal
 import unittest2
 from lldbtest import *
 
@@ -736,7 +737,7 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.set_inferior_startup_attach()
         self.Hg_switches_to_3_threads()
 
-    def Hc_then_Csignal_signals_correct_thread(self):
+    def Hc_then_Csignal_signals_correct_thread(self, segfault_signo):
         # NOTE only run this one in inferior-launched mode: we can't grab inferior stdout when running attached,
         # and the test requires getting stdout from the exe.
 
@@ -778,7 +779,7 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase):
             context = self.expect_gdbremote_sequence(timeout_seconds=10)
             self.assertIsNotNone(context)
             signo = context.get("signo")
-            self.assertEqual(int(signo, 16), self.TARGET_EXC_BAD_ACCESS)
+            self.assertEqual(int(signo, 16), segfault_signo)
 
             # Ensure we haven't seen this tid yet.
             thread_id = int(context.get("thread_id"), 16)
@@ -845,7 +846,8 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.init_debugserver_test()
         self.buildDsym()
         self.set_inferior_startup_launch()
-        self.Hc_then_Csignal_signals_correct_thread()
+        # Darwin debugserver translates some signals like SIGSEGV into some gdb expectations about fixed signal numbers.
+        self.Hc_then_Csignal_signals_correct_thread(self.TARGET_EXC_BAD_ACCESS)
 
     @llgs_test
     @dwarf_test
@@ -853,7 +855,7 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.init_llgs_test()
         self.buildDwarf()
         self.set_inferior_startup_launch()
-        self.Hc_then_Csignal_signals_correct_thread()
+        self.Hc_then_Csignal_signals_correct_thread(signal.SIGSEGV)
 
     def m_packet_reads_memory(self):
         # This is the memory we will write into the inferior and then ensure we can read back with $m.