[lldb] implement 'up' and 'down' shortcuts in lldb gui

Also add a unittest.

Differential Revision: https://reviews.llvm.org/D68541

diff --git a/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/Makefile b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/Makefile
new file mode 100644 (file)
index 0000000..7b75ed7
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/Makefile
@@ -0,0 +1,2 @@
+C_SOURCES := main.c func.c
+include Makefile.rules

diff --git a/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/TestGuiBasicDebug.py b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/TestGuiBasicDebug.py
new file mode 100644 (file)
index 0000000..54c763f
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/TestGuiBasicDebug.py
@@ -0,0 +1,42 @@
+"""
+Test the 'gui' shortcuts 's','n','f','u','d' (step in, step over, step out, up, down)
+"""
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.lldbpexpect import PExpectTest
+
+class TestGuiBasicDebugCommandTest(PExpectTest):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipIfCursesSupportMissing
+    def test_gui(self):
+        self.build()
+
+        self.launch(executable=self.getBuildArtifact("a.out"), dimensions=(100,500))
+        self.expect('br set -f main.c -p "// Break here"', substrs=["Breakpoint 1", "address ="])
+        self.expect("run", substrs=["stop reason ="])
+
+        escape_key = chr(27).encode()
+
+        # Start the GUI and close the welcome window.
+        self.child.sendline("gui")
+        self.child.send(escape_key)
+
+        # Simulate a simple debugging session.
+        self.child.send("s") # step
+        self.child.expect("return 1; // In function[^\r\n]+<<< Thread 1: step in")
+        self.child.send("u") # up
+        self.child.expect_exact("func(); // Break here")
+        self.child.send("d") # down
+        self.child.expect_exact("return 1; // In function")
+        self.child.send("f") # finish
+        self.child.expect("func\(\); // Break here[^\r\n]+<<< Thread 1: step out")
+        self.child.send("s") # move onto the second one
+        self.child.expect("func\(\); // Second[^\r\n]+<<< Thread 1: step in")
+        self.child.send("n") # step over
+        self.child.expect("return 0;[^\r\n]+<<< Thread 1: step over")
+
+        self.quit()

diff --git a/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/func.c b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/func.c
new file mode 100644 (file)
index 0000000..f404a17
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/func.c
@@ -0,0 +1,3 @@
+int func() {
+  return 1; // In function
+}

diff --git a/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/main.c b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/main.c
new file mode 100644 (file)
index 0000000..f776fb9
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/commands/gui/basicdebug/main.c
@@ -0,0 +1,7 @@
+extern int func();
+
+int main(int argc, char **argv) {
+  func(); // Break here
+  func(); // Second
+  return 0;
+}

diff --git a/lldb/source/Core/IOHandlerCursesGUI.cpp b/lldb/source/Core/IOHandlerCursesGUI.cpp
index 52bf889..fda3aa1 100644 (file)
--- a/lldb/source/Core/IOHandlerCursesGUI.cpp
+++ b/lldb/source/Core/IOHandlerCursesGUI.cpp
@@ -3243,6 +3243,8 @@ public:
         {'f', "Step out (finish)"},
         {'s', "Step in (source line)"},
         {'S', "Step in (single instruction)"},
+        {'u', "Frame up"},
+        {'d', "Frame down"},
         {',', "Page up"},
         {'.', "Page down"},
         {'\0', nullptr}};
@@ -3856,6 +3858,26 @@ public:
     }
       return eKeyHandled;
 
+    case 'u': // 'u' == frame up
+    case 'd': // 'd' == frame down
+    {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope()) {
+        Thread *thread = exe_ctx.GetThreadPtr();
+        uint32_t frame_idx = thread->GetSelectedFrameIndex();
+        if (frame_idx == UINT32_MAX)
+          frame_idx = 0;
+        if (c == 'u' && frame_idx + 1 < thread->GetStackFrameCount())
+          ++frame_idx;
+        else if (c == 'd' && frame_idx > 0)
+          --frame_idx;
+        if (thread->SetSelectedFrameByIndex(frame_idx, true))
+          exe_ctx.SetFrameSP(thread->GetSelectedFrame());
+      }
+    }
+      return eKeyHandled;
+
     case 'h':
       window.CreateHelpSubwindow();
       return eKeyHandled;