Adding test-case for llvm.org/pr15936 (known failure with GCC 4.6/4.7)
- verify that backtraces for stacks that include functions which contain
illegal instructions are correct, and that variables in said functions can be
printed.
git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181442 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/linux/builtin_trap/Makefile b/test/linux/builtin_trap/Makefile
new file mode 100644
index 0000000..8a7102e
--- /dev/null
+++ b/test/linux/builtin_trap/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules
diff --git a/test/linux/builtin_trap/TestBuiltinTrap.py b/test/linux/builtin_trap/TestBuiltinTrap.py
new file mode 100644
index 0000000..2e807fa
--- /dev/null
+++ b/test/linux/builtin_trap/TestBuiltinTrap.py
@@ -0,0 +1,70 @@
+"""
+Test lldb ability to unwind a stack with a function containing a call to the
+'__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode.
+"""
+
+import os
+import unittest2
+import lldb
+from lldbtest import *
+import lldbutil
+
+class BuiltinTrapTestCase(TestBase):
+
+ mydir = os.path.join("linux", "builtin_trap")
+
+ @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+ @dsym_test
+ def test_with_dsym_and_run_command(self):
+ """Test that LLDB handles a function with __builtin_trap correctly."""
+ self.buildDsym()
+ self.builtin_trap_unwind()
+
+ @dwarf_test
+ @expectedFailureGcc # PR-15936: LLDB is omits a function that contains an
+ # illegal opcode from backtraces. This
+ # failure is GCC 4.6 specific.
+ def test_with_dwarf_and_run_command(self):
+ """Test that LLDB handles a function with __builtin_trap correctly."""
+ self.buildDwarf()
+ self.builtin_trap_unwind()
+
+ def setUp(self):
+ # Call super's setUp().
+ TestBase.setUp(self)
+ # Find the line number to break at.
+ self.line = line_number('main.cpp', '// Set break point at this line.')
+
+ def builtin_trap_unwind(self):
+ """Test that LLDB handles unwinding a frame that contains a function
+ with a __builtin_trap intrinsic.
+ """
+ self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+
+ lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line,
+ num_expected_locations=1,
+ loc_exact=True)
+
+ self.runCmd("run", RUN_SUCCEEDED)
+
+ # The stop reason of the thread should be breakpoint.
+ self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+ substrs = ['stopped',
+ 'stop reason = breakpoint'])
+
+ # print backtrace, expect both 'bar' and 'main' functions to be listed
+ self.expect('bt', substrs = ['bar', 'main'])
+
+ # go up one frame
+ self.runCmd("up", RUN_SUCCEEDED)
+
+ # evaluate a local
+ self.expect('p foo', substrs = ['= 5'])
+
+
+
+if __name__ == '__main__':
+ import atexit
+ lldb.SBDebugger.Initialize()
+ atexit.register(lambda: lldb.SBDebugger.Terminate())
+ unittest2.main()
diff --git a/test/linux/builtin_trap/main.cpp b/test/linux/builtin_trap/main.cpp
new file mode 100644
index 0000000..84156ef
--- /dev/null
+++ b/test/linux/builtin_trap/main.cpp
@@ -0,0 +1,17 @@
+//===-- main.cpp ------------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+void bar(int const *foo) {
+ __builtin_trap(); // Set break point at this line.
+}
+
+int main() {
+ int foo = 5;
+ bar(&foo);
+}