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7e8de59b90
A number of test cases were failing on big-endian systems simply due to byte order assumptions in the tests themselves, and no underlying bug in LLDB. These two test cases: tools/lldb-server/lldbgdbserverutils.py python_api/process/TestProcessAPI.py actually check for big-endian target byte order, but contain Python errors in the corresponding code paths. These test cases: functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py functionalities/data-formatter/synthcapping/TestSyntheticCapping.py lang/cpp/frame-var-anon-unions/TestFrameVariableAnonymousUnions.py python_api/sbdata/TestSBData.py (first change) could be fixed to check for big-endian target byte order and update the expected result strings accordingly. For the two synthetic tests, I've also updated the source to make sure the fake_a value is always nonzero on both big- and little-endian platforms. These test case: python_api/sbdata/TestSBData.py (second change) functionalities/memory/cache/TestMemoryCache.py simply accessed memory with the wrong size, which wasn't noticed on LE but fails on BE. Differential Revision: http://reviews.llvm.org/D18985 llvm-svn: 266315
288 lines
12 KiB
Python
288 lines
12 KiB
Python
"""
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Test SBProcess APIs, including ReadMemory(), WriteMemory(), and others.
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"""
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from __future__ import print_function
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import os, time
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.lldbutil import get_stopped_thread, state_type_to_str
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class ProcessAPITestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break inside main().
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self.line = line_number("main.cpp", "// Set break point at this line and check variable 'my_char'.")
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@add_test_categories(['pyapi'])
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def test_read_memory(self):
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"""Test Python SBProcess.ReadMemory() API."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint")
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frame = thread.GetFrameAtIndex(0)
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# Get the SBValue for the global variable 'my_char'.
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val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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# Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and
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# expect to get a Python string as the result object!
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error = lldb.SBError()
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self.assertFalse(val.TypeIsPointerType())
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content = process.ReadMemory(val.AddressOf().GetValueAsUnsigned(), 1, error)
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if not error.Success():
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self.fail("SBProcess.ReadMemory() failed")
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if self.TraceOn():
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print("memory content:", content)
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self.expect(content, "Result from SBProcess.ReadMemory() matches our expected output: 'x'",
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exe=False,
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startstr = b'x')
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# Read (char *)my_char_ptr.
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val = frame.FindValue("my_char_ptr", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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cstring = process.ReadCStringFromMemory(val.GetValueAsUnsigned(), 256, error)
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if not error.Success():
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self.fail("SBProcess.ReadCStringFromMemory() failed")
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if self.TraceOn():
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print("cstring read is:", cstring)
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self.expect(cstring, "Result from SBProcess.ReadCStringFromMemory() matches our expected output",
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exe=False,
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startstr = 'Does it work?')
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# Get the SBValue for the global variable 'my_cstring'.
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val = frame.FindValue("my_cstring", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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# Due to the typemap magic (see lldb.swig), we pass in 256 to read at most 256 bytes
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# from the address, and expect to get a Python string as the result object!
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self.assertFalse(val.TypeIsPointerType())
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cstring = process.ReadCStringFromMemory(val.AddressOf().GetValueAsUnsigned(), 256, error)
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if not error.Success():
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self.fail("SBProcess.ReadCStringFromMemory() failed")
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if self.TraceOn():
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print("cstring read is:", cstring)
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self.expect(cstring, "Result from SBProcess.ReadCStringFromMemory() matches our expected output",
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exe=False,
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startstr = 'lldb.SBProcess.ReadCStringFromMemory() works!')
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# Get the SBValue for the global variable 'my_uint32'.
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val = frame.FindValue("my_uint32", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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# Due to the typemap magic (see lldb.swig), we pass in 4 to read 4 bytes
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# from the address, and expect to get an int as the result!
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self.assertFalse(val.TypeIsPointerType())
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my_uint32 = process.ReadUnsignedFromMemory(val.AddressOf().GetValueAsUnsigned(), 4, error)
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if not error.Success():
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self.fail("SBProcess.ReadCStringFromMemory() failed")
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if self.TraceOn():
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print("uint32 read is:", my_uint32)
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if my_uint32 != 12345:
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self.fail("Result from SBProcess.ReadUnsignedFromMemory() does not match our expected output")
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@add_test_categories(['pyapi'])
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def test_write_memory(self):
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"""Test Python SBProcess.WriteMemory() API."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint")
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frame = thread.GetFrameAtIndex(0)
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# Get the SBValue for the global variable 'my_char'.
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val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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# If the variable does not have a load address, there's no sense continuing.
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if not val.GetLocation().startswith("0x"):
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return
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# OK, let's get the hex location of the variable.
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location = int(val.GetLocation(), 16)
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# The program logic makes the 'my_char' variable to have memory content as 'x'.
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# But we want to use the WriteMemory() API to assign 'a' to the variable.
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# Now use WriteMemory() API to write 'a' into the global variable.
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error = lldb.SBError()
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result = process.WriteMemory(location, 'a', error)
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if not error.Success() or result != 1:
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self.fail("SBProcess.WriteMemory() failed")
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# Read from the memory location. This time it should be 'a'.
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# Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and
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# expect to get a Python string as the result object!
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content = process.ReadMemory(location, 1, error)
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if not error.Success():
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self.fail("SBProcess.ReadMemory() failed")
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if self.TraceOn():
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print("memory content:", content)
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self.expect(content, "Result from SBProcess.ReadMemory() matches our expected output: 'a'",
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exe=False,
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startstr = b'a')
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@add_test_categories(['pyapi'])
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def test_access_my_int(self):
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"""Test access 'my_int' using Python SBProcess.GetByteOrder() and other APIs."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint")
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frame = thread.GetFrameAtIndex(0)
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# Get the SBValue for the global variable 'my_int'.
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val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal)
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self.DebugSBValue(val)
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# If the variable does not have a load address, there's no sense continuing.
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if not val.GetLocation().startswith("0x"):
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return
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# OK, let's get the hex location of the variable.
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location = int(val.GetLocation(), 16)
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# Note that the canonical from of the bytearray is little endian.
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from lldbsuite.test.lldbutil import int_to_bytearray, bytearray_to_int
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byteSize = val.GetByteSize()
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bytes = int_to_bytearray(256, byteSize)
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byteOrder = process.GetByteOrder()
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if byteOrder == lldb.eByteOrderBig:
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bytes.reverse()
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elif byteOrder == lldb.eByteOrderLittle:
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pass
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else:
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# Neither big endian nor little endian? Return for now.
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# Add more logic here if we want to handle other types.
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return
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# The program logic makes the 'my_int' variable to have int type and value of 0.
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# But we want to use the WriteMemory() API to assign 256 to the variable.
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# Now use WriteMemory() API to write 256 into the global variable.
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error = lldb.SBError()
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result = process.WriteMemory(location, bytes, error)
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if not error.Success() or result != byteSize:
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self.fail("SBProcess.WriteMemory() failed")
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# Make sure that the val we got originally updates itself to notice the change:
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self.expect(val.GetValue(),
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"SBProcess.ReadMemory() successfully writes (int)256 to the memory location for 'my_int'",
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exe=False,
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startstr = '256')
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# And for grins, get the SBValue for the global variable 'my_int' again, to make sure that also tracks the new value:
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val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal)
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self.expect(val.GetValue(),
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"SBProcess.ReadMemory() successfully writes (int)256 to the memory location for 'my_int'",
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exe=False,
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startstr = '256')
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# Now read the memory content. The bytearray should have (byte)1 as the second element.
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content = process.ReadMemory(location, byteSize, error)
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if not error.Success():
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self.fail("SBProcess.ReadMemory() failed")
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# The bytearray_to_int utility function expects a little endian bytearray.
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if byteOrder == lldb.eByteOrderBig:
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content = bytearray(content, 'ascii')
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content.reverse()
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new_value = bytearray_to_int(content, byteSize)
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if new_value != 256:
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self.fail("Memory content read from 'my_int' does not match (int)256")
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# Dump the memory content....
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if self.TraceOn():
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for i in content:
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print("byte:", i)
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@add_test_categories(['pyapi'])
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def test_remote_launch(self):
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"""Test SBProcess.RemoteLaunch() API with a process not in eStateConnected, and it should fail."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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if self.TraceOn():
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print("process state:", state_type_to_str(process.GetState()))
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self.assertTrue(process.GetState() != lldb.eStateConnected)
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error = lldb.SBError()
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success = process.RemoteLaunch(None, None, None, None, None, None, 0, False, error)
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self.assertTrue(not success, "RemoteLaunch() should fail for process state != eStateConnected")
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@add_test_categories(['pyapi'])
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def test_get_num_supported_hardware_watchpoints(self):
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"""Test SBProcess.GetNumSupportedHardwareWatchpoints() API with a process."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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error = lldb.SBError();
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num = process.GetNumSupportedHardwareWatchpoints(error)
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if self.TraceOn() and error.Success():
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print("Number of supported hardware watchpoints: %d" % num)
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