Add a simple watchpoint test to exercise watchpoint creation followed by watchpoint hit events.

llvm-svn: 139847

lldb/test/functionalities/watchpoint/hello_watchpoint/Makefile

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

lldb/test/functionalities/watchpoint/hello_watchpoint/TestMyFirstWatchpoint.py

@@ -0,0 +1,81 @@
+"""
+Test my first lldb watchpoint.
+"""
+
+import os, time
+import unittest2
+import lldb
+from lldbtest import *
+
+class HelloWatchpointTestCase(TestBase):
+
+    mydir = os.path.join("functionalities", "watchpoint", "hello_watchpoint")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    def test_hello_watchpoint_with_dsym(self):
+        """Test a simple sequence of watchpoint creation and watchpoint hit."""
+        self.buildDsym(dictionary=self.d)
+        self.setTearDownCleanup(dictionary=self.d)
+        self.hello_watchpoint()
+
+    def test_hello_watchpoint_with_dwarf(self):
+        """Test a simple sequence of watchpoint creation and watchpoint hit."""
+        self.buildDwarf(dictionary=self.d)
+        self.setTearDownCleanup(dictionary=self.d)
+        self.hello_watchpoint()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Our simple source filename.
+        self.source = 'main.c'
+        # Find the line number to break inside main().
+        self.line = line_number(self.source, '// Set break point at this line.')
+        # Build dictionary to have unique executable names for each test method.
+        self.exe_name = self.testMethodName
+        self.d = {'C_SOURCES': self.source, 'EXE': self.exe_name}
+
+    def hello_watchpoint(self):
+        """Test a simple sequence of watchpoint creation and watchpoint hit."""
+        exe = os.path.join(os.getcwd(), self.exe_name)
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        # Add a breakpoint to set a watchpoint when stopped on the breakpoint.
+        self.expect("breakpoint set -l %d" % self.line, BREAKPOINT_CREATED,
+            startstr = "Breakpoint created: 1: file ='%s', line = %d, locations = 1" %
+                       (self.source, self.line))
+
+        # Run the program.
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # We should be stopped again due to the breakpoint.
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['stopped',
+                       'stop reason = breakpoint'])
+
+        # Now let's set a write-type watchpoint for 'global'.
+        # There should be only one watchpoint hit (see main.c).
+        self.expect("frame variable -w write -g -L global", WATCHPOINT_CREATED,
+            substrs = ['Watchpoint created', 'size = 4', 'type = w'])
+
+        self.runCmd("process continue")
+
+        # We should be stopped again due to the watchpoint (write type), but
+        # only once.  The stop reason of the thread should be watchpoint.
+        self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT,
+            substrs = ['stopped',
+                       'stop reason = watchpoint'])
+
+        self.runCmd("process continue")
+        # Don't expect the read of 'global' to trigger a stop exception.
+        # The process status should be 'exited'.
+        self.expect("process status",
+            substrs = ['exited'])
+
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/watchpoint/hello_watchpoint/main.c

@@ -0,0 +1,24 @@
+//===-- 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 <stdio.h>
+#include <stdint.h>
+
+int32_t global = 10;
+
+int main(int argc, char** argv) {
+    int local = 0;
+    printf("&global=%p\n", &global);
+    printf("about to write to 'global'...\n"); // Set break point at this line.
+                                               // When stopped, watch 'global' for write.
+    global = 20;
+    local += argc;
+    ++local;
+    printf("local: %d\n", local);
+    printf("global=%d\n", global);
+}

lldb/test/lldbtest.py

@@ -176,6 +176,8 @@ STOPPED_DUE_TO_SIGNAL = "Process state is stopped due to signal"
 
 STOPPED_DUE_TO_STEP_IN = "Process state is stopped due to step in"
 
+STOPPED_DUE_TO_WATCHPOINT = "Process should be stopped due to watchpoint"
+
 DATA_TYPES_DISPLAYED_CORRECTLY = "Data type(s) displayed correctly"
 
 VALID_BREAKPOINT = "Got a valid breakpoint"
@@ -198,6 +200,7 @@ VALID_VARIABLE = "Got a valid variable"
 
 VARIABLES_DISPLAYED_CORRECTLY = "Variable(s) displayed correctly"
 
+WATCHPOINT_CREATED = "Watchpoint created successfully"
 
 def CMD_MSG(str):
     '''A generic "Command '%s' returns successfully" message generator.'''