Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/lldb/packages/Python/lldbsuite/test/functionalities/longjmp/Makefile

@@ -0,0 +1,5 @@
+LEVEL = ../../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules

external/llvm-project/lldb/packages/Python/lldbsuite/test/functionalities/longjmp/TestLongjmp.py

@@ -0,0 +1,87 @@
+"""
+Test the use of setjmp/longjmp for non-local goto operations in a single-threaded inferior.
+"""
+
+from __future__ import print_function
+
+
+import os
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LongjmpTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        TestBase.setUp(self)
+
+    @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
+    @skipIfFreeBSD  # llvm.org/pr17214
+    @expectedFailureAll(oslist=["linux"], bugnumber="llvm.org/pr20231")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
+    def test_step_out(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out."""
+        self.build()
+        self.step_out()
+
+    @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
+    @skipIfFreeBSD  # llvm.org/pr17214
+    @expectedFailureAll(oslist=["linux"], bugnumber="llvm.org/pr20231")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
+    def test_step_over(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-over a longjmp."""
+        self.build()
+        self.step_over()
+
+    @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
+    @skipIfFreeBSD  # llvm.org/pr17214
+    @expectedFailureAll(oslist=["linux"], bugnumber="llvm.org/pr20231")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
+    def test_step_back_out(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out after thread step-in."""
+        self.build()
+        self.step_back_out()
+
+    def start_test(self, symbol):
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        # Break in main().
+        lldbutil.run_break_set_by_symbol(
+            self, symbol, num_expected_locations=-1)
+
+        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'])
+
+    def check_status(self):
+        # Note: Depending on the generated mapping of DWARF to assembly,
+        # the process may have stopped or exited.
+        self.expect("process status", PROCESS_STOPPED,
+                    patterns=['Process .* exited with status = 0'])
+
+    def step_out(self):
+        self.start_test("do_jump")
+        self.runCmd("thread step-out", RUN_SUCCEEDED)
+        self.check_status()
+
+    def step_over(self):
+        self.start_test("do_jump")
+        self.runCmd("thread step-over", RUN_SUCCEEDED)
+        self.runCmd("thread step-over", RUN_SUCCEEDED)
+        self.check_status()
+
+    def step_back_out(self):
+        self.start_test("main")
+
+        self.runCmd("thread step-over", RUN_SUCCEEDED)
+        self.runCmd("thread step-in", RUN_SUCCEEDED)
+        self.runCmd("thread step-out", RUN_SUCCEEDED)
+        self.check_status()

external/llvm-project/lldb/packages/Python/lldbsuite/test/functionalities/longjmp/main.c

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+//===-- 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 <setjmp.h>
+#include <stdio.h>
+#include <time.h>
+
+jmp_buf j;
+
+void do_jump(void)
+{
+    // We can't let the compiler know this will always happen or it might make
+    // optimizations that break our test.
+    if (!clock())
+        longjmp(j, 1); // non-local goto
+}
+
+int main (void)
+{
+    if (setjmp(j) == 0)
+        do_jump();
+    else
+        return 0; // destination of longjmp
+
+    return 1;
+}