Add an API SBProcess::GetByteOrder() and add test cases which utilizes GetByteOrder(),
among other SBProcess APIs, to write (int)256 into a memory location of a global variable
(int)my_int and reads/checks the variable afterwards.
llvm-svn: 126792
diff --git a/lldb/test/python_api/process/TestProcessAPI.py b/lldb/test/python_api/process/TestProcessAPI.py
index c526dd6..1e92fa3 100644
--- a/lldb/test/python_api/process/TestProcessAPI.py
+++ b/lldb/test/python_api/process/TestProcessAPI.py
@@ -37,6 +37,19 @@
self.buildDwarf()
self.write_memory()
+ @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+ @python_api_test
+ def test_access_my_int_with_dsym(self):
+ """Test access 'my_int' using Python SBProcess.GetByteOrder() and other APIs."""
+ self.buildDsym()
+ self.access_my_int()
+
+ @python_api_test
+ def test_access_my_int_with_dwarf(self):
+ """Test access 'my_int' using Python SBProcess.GetByteOrder() and other APIs."""
+ self.buildDwarf()
+ self.access_my_int()
+
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
@@ -132,6 +145,83 @@
exe=False,
startstr = 'a')
+ def access_my_int(self):
+ """Test access 'my_int' using Python SBProcess.GetByteOrder() and other APIs."""
+ exe = os.path.join(os.getcwd(), "a.out")
+ self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+ target = self.dbg.CreateTarget(exe)
+ self.assertTrue(target.IsValid(), VALID_TARGET)
+
+ breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
+ self.assertTrue(breakpoint.IsValid(), VALID_BREAKPOINT)
+
+ # Launch the process, and do not stop at the entry point.
+ error = lldb.SBError()
+ self.process = target.Launch (self.dbg.GetListener(), None, None, os.ctermid(), os.ctermid(), os.ctermid(), None, 0, False, error)
+
+ thread = self.process.GetThreadAtIndex(0);
+ frame = thread.GetFrameAtIndex(0);
+
+ # Get the SBValue for the global variable 'my_int'.
+ val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal)
+ self.DebugSBValue(frame, val)
+
+ # If the variable does not have a load address, there's no sense continuing.
+ if not val.GetLocation(frame).startswith("0x"):
+ return
+
+ # OK, let's get the hex location of the variable.
+ location = int(val.GetLocation(frame), 16)
+
+ byteSize = val.GetByteSize()
+ byteOrder = self.process.GetByteOrder()
+ bytes = bytearray(byteSize)
+
+ if byteOrder == lldb.eByteOrderBig:
+ # 256 in big endian => 0x00000100
+ # the second byte counted from the end is to be 0b00000001
+ bytes[-2] = 0b00000001
+ elif byteOrder == lldb.eByteOrderLittle:
+ # 256 in little endian => 0x00010000
+ # the second byte counted from the start is to be 0b00000001
+ bytes[1] = 0b00000001
+ else:
+ # Neither big endian nor little endian? Return for now.
+ return
+
+ # The program logic makes the 'my_int' variable to have int type and value of 0.
+ # But we want to use the WriteMemory() API to assign 256 to the variable.
+
+ # Now use WriteMemory() API to write 256 into the global variable.
+ new_value = str(bytes)
+ result = self.process.WriteMemory(location, new_value, error)
+ if not error.Success() or result != byteSize:
+ self.fail("SBProcess.WriteMemory() failed")
+
+ # Get the SBValue for the global variable 'my_int' again, with its updated value.
+ val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal)
+ self.expect(val.GetValue(frame),
+ "SBProcess.ReadMemory() successfully writes (int)256 to the memory location for 'my_int'",
+ exe=False,
+ startstr = '256')
+
+ # Now read the memory content. The bytearray should have (byte)1 as the second element.
+ content = self.process.ReadMemory(location, byteSize, error)
+ if not error.Success():
+ self.fail("SBProcess.ReadMemory() failed")
+ new_bytes = bytearray(content, "ascii")
+ if byteOrder == lldb.eByteOrderBig:
+ if new_bytes[-2] != 0b00000001:
+ self.fail("Memory content read from 'my_int' does not match (int)256")
+ elif byteOrder == lldb.eByteOrderLittle:
+ if new_bytes[1] != 0b00000001:
+ self.fail("Memory content read from 'my_int' does not match (int)256")
+
+ # Dump the memory content....
+ for i in new_bytes:
+ print "byte:", i
+
if __name__ == '__main__':
import atexit
diff --git a/lldb/test/python_api/process/main.cpp b/lldb/test/python_api/process/main.cpp
index 0d507b9..4d5b5e6 100644
--- a/lldb/test/python_api/process/main.cpp
+++ b/lldb/test/python_api/process/main.cpp
@@ -11,6 +11,7 @@
// This simple program is to test the lldb Python API related to process.
char my_char = 'u';
+int my_int = 0;
int main (int argc, char const *argv[])
{
@@ -22,4 +23,5 @@
printf("after the loop: my_char='%c'\n", my_char); // 'my_char' should print out as 'x'.
return 0; // Set break point at this line and check variable 'my_char'.
+ // Use lldb Python API to set memory content for my_int and check the result.
}