f188c97cc1
While debugging the tests for #155000 I found it helpful to have both sides of the simulated gdb-rsp traffic rather than just the responses so I've extended the packetLog in MockGDBServerResponder to record traffic in both directions. Tests have been updated accordingly
730 lines
25 KiB
Python
730 lines
25 KiB
Python
import lldb
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import binascii
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import os.path
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.decorators import *
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from lldbsuite.test.gdbclientutils import *
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from lldbsuite.test.lldbgdbclient import GDBRemoteTestBase
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class TestGDBRemoteClient(GDBRemoteTestBase):
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class gPacketResponder(MockGDBServerResponder):
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registers = [
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"name:rax;bitsize:64;offset:0;encoding:uint;format:hex;set:General Purpose Registers;ehframe:0;dwarf:0;",
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"name:rbx;bitsize:64;offset:8;encoding:uint;format:hex;set:General Purpose Registers;ehframe:3;dwarf:3;",
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"name:rcx;bitsize:64;offset:16;encoding:uint;format:hex;set:General Purpose Registers;ehframe:2;dwarf:2;generic:arg4;",
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"name:rdx;bitsize:64;offset:24;encoding:uint;format:hex;set:General Purpose Registers;ehframe:1;dwarf:1;generic:arg3;",
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"name:rdi;bitsize:64;offset:32;encoding:uint;format:hex;set:General Purpose Registers;ehframe:5;dwarf:5;generic:arg1;",
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"name:rsi;bitsize:64;offset:40;encoding:uint;format:hex;set:General Purpose Registers;ehframe:4;dwarf:4;generic:arg2;",
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"name:rbp;bitsize:64;offset:48;encoding:uint;format:hex;set:General Purpose Registers;ehframe:6;dwarf:6;generic:fp;",
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"name:rsp;bitsize:64;offset:56;encoding:uint;format:hex;set:General Purpose Registers;ehframe:7;dwarf:7;generic:sp;",
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]
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def qRegisterInfo(self, num):
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try:
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return self.registers[num]
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except IndexError:
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return "E45"
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def readRegisters(self):
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return len(self.registers) * 16 * "0"
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def readRegister(self, register):
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return "0000000000000000"
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def test_connect(self):
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"""Test connecting to a remote gdb server"""
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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self.assertPacketLogReceived(["qProcessInfo", "qfThreadInfo"])
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def test_attach_fail(self):
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error_msg = "mock-error-msg"
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class MyResponder(MockGDBServerResponder):
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# Pretend we don't have any process during the initial queries.
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def qC(self):
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return "E42"
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def qfThreadInfo(self):
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return "OK" # No threads.
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# Then, when we are asked to attach, error out.
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def vAttach(self, pid):
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return "E42;" + binascii.hexlify(error_msg.encode()).decode()
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self.server.responder = MyResponder()
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target = self.dbg.CreateTarget("")
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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error = lldb.SBError()
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target.AttachToProcessWithID(lldb.SBListener(), 47, error)
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self.assertEqual(error_msg, error.GetCString())
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def test_launch_fail(self):
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class MyResponder(MockGDBServerResponder):
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# Pretend we don't have any process during the initial queries.
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def qC(self):
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return "E42"
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def qfThreadInfo(self):
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return "OK" # No threads.
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# Then, when we are asked to attach, error out.
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def A(self, packet):
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return "E47"
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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error = lldb.SBError()
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target.Launch(
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lldb.SBListener(), None, None, None, None, None, None, 0, True, error
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)
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self.assertRegex(error.GetCString(), "Cannot launch '.*a': Error 71")
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def test_launch_rich_error(self):
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class MyResponder(MockGDBServerResponder):
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def qC(self):
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return "E42"
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def qfThreadInfo(self):
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return "OK" # No threads.
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# Then, when we are asked to attach, error out.
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def vRun(self, packet):
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return "Eff;" + seven.hexlify("I'm a teapot")
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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error = lldb.SBError()
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target.Launch(
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lldb.SBListener(), None, None, None, None, None, None, 0, True, error
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)
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self.assertRegex(error.GetCString(), "Cannot launch '.*a': I'm a teapot")
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def test_read_registers_using_g_packets(self):
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"""Test reading registers using 'g' packets (default behavior)"""
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self.dbg.HandleCommand(
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"settings set plugin.process.gdb-remote.use-g-packet-for-reading true"
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)
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self.addTearDownHook(
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lambda: self.runCmd(
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"settings set plugin.process.gdb-remote.use-g-packet-for-reading false"
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)
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)
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self.server.responder = self.gPacketResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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# We want to make sure that the process is using the g packet, but it's
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# not required the "connect" should read all registers. However, it might
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# have... So we need to wait till we explicitly 'read_registers' to do
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# test.
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# Also, even with the use-g-packet-for-reading lldb will sometimes send p0
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# early on to see if the packet is supported. So we can't say that there
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# will be NO p packets.
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# But there certainly should be no p packets after the g packet.
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self.read_registers(process)
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received = self.server.responder.packetLog.get_received()
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print(f"\nPACKET LOG:\n{received}\n")
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g_pos = 0
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try:
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g_pos = received.index("g")
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except err:
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self.fail("'g' packet not found after fetching registers")
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try:
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second_g = received.index("g", g_pos + 1)
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self.fail("Found more than one 'g' packet")
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except:
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pass
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# Make sure there aren't any `p` packets after the `g` packet:
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self.assertEqual(
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0,
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len([p for p in received[g_pos:] if p.startswith("p")]),
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)
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def test_read_registers_using_p_packets(self):
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"""Test reading registers using 'p' packets"""
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self.dbg.HandleCommand(
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"settings set plugin.process.gdb-remote.use-g-packet-for-reading false"
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)
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self.server.responder = self.gPacketResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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self.read_registers(process)
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received = self.server.responder.packetLog.get_received()
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self.assertNotIn("g", received)
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self.assertGreater(len([p for p in received if p.startswith("p")]), 0)
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def test_write_registers_using_P_packets(self):
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"""Test writing registers using 'P' packets (default behavior)"""
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self.server.responder = self.gPacketResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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self.write_registers(process)
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received = self.server.responder.packetLog.get_received()
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self.assertEqual(0, len([p for p in received if p.startswith("G")]))
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self.assertGreater(len([p for p in received if p.startswith("P")]), 0)
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def test_write_registers_using_G_packets(self):
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"""Test writing registers using 'G' packets"""
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class MyResponder(self.gPacketResponder):
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def readRegister(self, register):
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# empty string means unsupported
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return ""
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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self.write_registers(process)
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received = self.server.responder.packetLog.get_received()
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self.assertEqual(0, len([p for p in received if p.startswith("P")]))
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self.assertGreater(len([p for p in received if p.startswith("G")]), 0)
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def read_registers(self, process):
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self.for_each_gpr(
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process, lambda r: self.assertEqual("0x0000000000000000", r.GetValue())
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)
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def write_registers(self, process):
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self.for_each_gpr(
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process, lambda r: r.SetValueFromCString("0x0000000000000000")
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)
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def for_each_gpr(self, process, operation):
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registers = process.GetThreadAtIndex(0).GetFrameAtIndex(0).GetRegisters()
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self.assertGreater(registers.GetSize(), 0)
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regSet = registers[0]
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numChildren = regSet.GetNumChildren()
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self.assertGreater(numChildren, 0)
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for i in range(numChildren):
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operation(regSet.GetChildAtIndex(i))
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def test_launch_A(self):
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class MyResponder(MockGDBServerResponder):
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def __init__(self, *args, **kwargs):
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self.started = False
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return super().__init__(*args, **kwargs)
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def qC(self):
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if self.started:
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return "QCp10.10"
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else:
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return "E42"
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def qfThreadInfo(self):
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if self.started:
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return "mp10.10"
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else:
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return "E42"
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def qsThreadInfo(self):
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return "l"
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def A(self, packet):
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self.started = True
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return "OK"
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def qLaunchSuccess(self):
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if self.started:
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return "OK"
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return "E42"
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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# NB: apparently GDB packets are using "/" on Windows too
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exe_path = self.getBuildArtifact("a").replace(os.path.sep, "/")
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exe_hex = binascii.b2a_hex(exe_path.encode()).decode()
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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target.Launch(
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lldb.SBListener(),
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["arg1", "arg2", "arg3"], # argv
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[], # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working_directory
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0, # launch_flags
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True, # stop_at_entry
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lldb.SBError(),
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) # error
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetProcessID(), 16)
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self.assertPacketLogReceived(
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[
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"A%d,0,%s,8,1,61726731,8,2,61726732,8,3,61726733"
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% (len(exe_hex), exe_hex),
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]
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)
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def test_launch_vRun(self):
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class MyResponder(MockGDBServerResponder):
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def __init__(self, *args, **kwargs):
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self.started = False
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return super().__init__(*args, **kwargs)
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def qC(self):
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if self.started:
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return "QCp10.10"
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else:
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return "E42"
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def qfThreadInfo(self):
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if self.started:
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return "mp10.10"
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else:
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return "E42"
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def qsThreadInfo(self):
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return "l"
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def vRun(self, packet):
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self.started = True
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return "T13"
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def A(self, packet):
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return "E28"
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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# NB: apparently GDB packets are using "/" on Windows too
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exe_path = self.getBuildArtifact("a").replace(os.path.sep, "/")
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exe_hex = binascii.b2a_hex(exe_path.encode()).decode()
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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process = target.Launch(
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lldb.SBListener(),
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["arg1", "arg2", "arg3"], # argv
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[], # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working_directory
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0, # launch_flags
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True, # stop_at_entry
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lldb.SBError(),
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) # error
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetProcessID(), 16)
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self.assertPacketLogReceived(
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["vRun;%s;61726731;61726732;61726733" % (exe_hex,)]
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)
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def test_launch_lengthy_vRun(self):
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class MyResponder(MockGDBServerResponder):
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def __init__(self, *args, **kwargs):
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self.started = False
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return super().__init__(*args, **kwargs)
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def qC(self):
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if self.started:
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return "QCp10.10"
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else:
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return "E42"
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def qfThreadInfo(self):
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if self.started:
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return "mp10.10"
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else:
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return "E42"
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def qsThreadInfo(self):
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return "l"
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def qEcho(self, num):
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resp = "qEcho:" + str(num)
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if num >= 2:
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# We have launched our program
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self.started = True
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return [resp, "T13"]
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return resp
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def qSupported(self, client_supported):
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return "PacketSize=3fff;QStartNoAckMode+;qEcho+;"
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def qHostInfo(self):
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return "default_packet_timeout:1;"
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def vRun(self, packet):
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return [self.RESPONSE_NONE]
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def A(self, packet):
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return "E28"
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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# NB: apparently GDB packets are using "/" on Windows too
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exe_path = self.getBuildArtifact("a").replace(os.path.sep, "/")
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exe_hex = binascii.b2a_hex(exe_path.encode()).decode()
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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process = target.Launch(
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lldb.SBListener(),
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["arg1", "arg2", "arg3"], # argv
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[], # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working_directory
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0, # launch_flags
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True, # stop_at_entry
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lldb.SBError(),
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) # error
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetProcessID(), 16)
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self.assertPacketLogReceived(
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["vRun;%s;61726731;61726732;61726733" % (exe_hex,)]
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)
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def test_launch_QEnvironment(self):
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class MyResponder(MockGDBServerResponder):
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def qC(self):
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return "E42"
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def qfThreadInfo(self):
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return "E42"
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def vRun(self, packet):
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self.started = True
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return "E28"
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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target.Launch(
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lldb.SBListener(),
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[], # argv
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[
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"PLAIN=foo",
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"NEEDSENC=frob$",
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"NEEDSENC2=fr*ob",
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"NEEDSENC3=fro}b",
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"NEEDSENC4=f#rob",
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"EQUALS=foo=bar",
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], # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working_directory
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0, # launch_flags
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True, # stop_at_entry
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lldb.SBError(),
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) # error
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self.assertPacketLogReceived(
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[
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"QEnvironment:EQUALS=foo=bar",
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"QEnvironmentHexEncoded:4e45454453454e433d66726f6224",
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"QEnvironmentHexEncoded:4e45454453454e43323d66722a6f62",
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"QEnvironmentHexEncoded:4e45454453454e43333d66726f7d62",
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"QEnvironmentHexEncoded:4e45454453454e43343d6623726f62",
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"QEnvironment:PLAIN=foo",
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]
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)
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def test_launch_QEnvironmentHexEncoded_only(self):
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class MyResponder(MockGDBServerResponder):
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def qC(self):
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return "E42"
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def qfThreadInfo(self):
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return "E42"
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def vRun(self, packet):
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self.started = True
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return "E28"
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def QEnvironment(self, packet):
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return ""
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self.server.responder = MyResponder()
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target = self.createTarget("a.yaml")
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process = self.connect(target)
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lldbutil.expect_state_changes(
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self, self.dbg.GetListener(), process, [lldb.eStateConnected]
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)
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target.Launch(
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lldb.SBListener(),
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[], # argv
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[
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"PLAIN=foo",
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"NEEDSENC=frob$",
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"NEEDSENC2=fr*ob",
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"NEEDSENC3=fro}b",
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"NEEDSENC4=f#rob",
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"EQUALS=foo=bar",
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], # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working_directory
|
|
0, # launch_flags
|
|
True, # stop_at_entry
|
|
lldb.SBError(),
|
|
) # error
|
|
|
|
self.assertPacketLogReceived(
|
|
[
|
|
"QEnvironmentHexEncoded:455155414c533d666f6f3d626172",
|
|
"QEnvironmentHexEncoded:4e45454453454e433d66726f6224",
|
|
"QEnvironmentHexEncoded:4e45454453454e43323d66722a6f62",
|
|
"QEnvironmentHexEncoded:4e45454453454e43333d66726f7d62",
|
|
"QEnvironmentHexEncoded:4e45454453454e43343d6623726f62",
|
|
"QEnvironmentHexEncoded:504c41494e3d666f6f",
|
|
]
|
|
)
|
|
|
|
def test_detach_no_multiprocess(self):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.detached = None
|
|
|
|
def qfThreadInfo(self):
|
|
return "10200"
|
|
|
|
def D(self, packet):
|
|
self.detached = packet
|
|
return "OK"
|
|
|
|
self.server.responder = MyResponder()
|
|
target = self.dbg.CreateTarget("")
|
|
process = self.connect(target)
|
|
process.Detach()
|
|
self.assertEqual(self.server.responder.detached, "D")
|
|
|
|
def test_detach_pid(self):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def __init__(self, test_case):
|
|
super().__init__()
|
|
self.test_case = test_case
|
|
self.detached = None
|
|
|
|
def qSupported(self, client_supported):
|
|
self.test_case.assertIn("multiprocess+", client_supported)
|
|
return "multiprocess+;" + super().qSupported(client_supported)
|
|
|
|
def qfThreadInfo(self):
|
|
return "mp400.10200"
|
|
|
|
def D(self, packet):
|
|
self.detached = packet
|
|
return "OK"
|
|
|
|
self.server.responder = MyResponder(self)
|
|
target = self.dbg.CreateTarget("")
|
|
process = self.connect(target)
|
|
process.Detach()
|
|
self.assertRegex(self.server.responder.detached, r"D;0*400")
|
|
|
|
def test_signal_gdb(self):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def qSupported(self, client_supported):
|
|
return "PacketSize=3fff;QStartNoAckMode+"
|
|
|
|
def haltReason(self):
|
|
return "S0a"
|
|
|
|
def cont(self):
|
|
return self.haltReason()
|
|
|
|
self.server.responder = MyResponder()
|
|
|
|
self.runCmd("platform select remote-linux")
|
|
target = self.createTarget("a.yaml")
|
|
process = self.connect(target)
|
|
|
|
self.assertEqual(process.threads[0].GetStopReason(), lldb.eStopReasonSignal)
|
|
self.assertEqual(process.threads[0].stop_description, "signal SIGBUS")
|
|
|
|
def test_signal_lldb_old(self):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def qSupported(self, client_supported):
|
|
return "PacketSize=3fff;QStartNoAckMode+"
|
|
|
|
def qHostInfo(self):
|
|
return "triple:61726d76372d756e6b6e6f776e2d6c696e75782d676e75;"
|
|
|
|
def QThreadSuffixSupported(self):
|
|
return "OK"
|
|
|
|
def haltReason(self):
|
|
return "S0a"
|
|
|
|
def cont(self):
|
|
return self.haltReason()
|
|
|
|
self.server.responder = MyResponder()
|
|
|
|
self.runCmd("platform select remote-linux")
|
|
target = self.createTarget("a.yaml")
|
|
process = self.connect(target)
|
|
|
|
self.assertEqual(process.threads[0].GetStopReason(), lldb.eStopReasonSignal)
|
|
self.assertEqual(process.threads[0].stop_description, "signal SIGUSR1")
|
|
|
|
def test_signal_lldb(self):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def qSupported(self, client_supported):
|
|
return "PacketSize=3fff;QStartNoAckMode+;native-signals+"
|
|
|
|
def qHostInfo(self):
|
|
return "triple:61726d76372d756e6b6e6f776e2d6c696e75782d676e75;"
|
|
|
|
def haltReason(self):
|
|
return "S0a"
|
|
|
|
def cont(self):
|
|
return self.haltReason()
|
|
|
|
self.server.responder = MyResponder()
|
|
|
|
self.runCmd("platform select remote-linux")
|
|
target = self.createTarget("a.yaml")
|
|
process = self.connect(target)
|
|
|
|
self.assertEqual(process.threads[0].GetStopReason(), lldb.eStopReasonSignal)
|
|
self.assertEqual(process.threads[0].stop_description, "signal SIGUSR1")
|
|
|
|
def do_siginfo_test(self, platform, target_yaml, raw_data, expected):
|
|
class MyResponder(MockGDBServerResponder):
|
|
def qSupported(self, client_supported):
|
|
return "PacketSize=3fff;QStartNoAckMode+;qXfer:siginfo:read+"
|
|
|
|
def qXferRead(self, obj, annex, offset, length):
|
|
if obj == "siginfo":
|
|
return raw_data, False
|
|
else:
|
|
return None, False
|
|
|
|
def haltReason(self):
|
|
return "T02"
|
|
|
|
def cont(self):
|
|
return self.haltReason()
|
|
|
|
self.server.responder = MyResponder()
|
|
|
|
self.runCmd("platform select " + platform)
|
|
target = self.createTarget(target_yaml)
|
|
process = self.connect(target)
|
|
|
|
siginfo = process.threads[0].GetSiginfo()
|
|
self.assertSuccess(siginfo.GetError())
|
|
|
|
for key, value in expected.items():
|
|
self.assertEqual(
|
|
siginfo.GetValueForExpressionPath("." + key).GetValueAsUnsigned(), value
|
|
)
|
|
|
|
def test_siginfo_linux_amd64(self):
|
|
data = (
|
|
# si_signo si_errno si_code
|
|
"\x11\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"
|
|
# __pad0 si_pid si_uid
|
|
"\x00\x00\x00\x00\xbf\xf7\x0b\x00\xe8\x03\x00\x00"
|
|
# si_status
|
|
"\x0c\x00\x00\x00"
|
|
+ "\x00" * 100
|
|
)
|
|
expected = {
|
|
"si_signo": 17, # SIGCHLD
|
|
"si_errno": 0,
|
|
"si_code": 1, # CLD_EXITED
|
|
"_sifields._sigchld.si_pid": 784319,
|
|
"_sifields._sigchld.si_uid": 1000,
|
|
"_sifields._sigchld.si_status": 12,
|
|
"_sifields._sigchld.si_utime": 0,
|
|
"_sifields._sigchld.si_stime": 0,
|
|
}
|
|
self.do_siginfo_test("remote-linux", "basic_eh_frame.yaml", data, expected)
|
|
|
|
def test_siginfo_linux_i386(self):
|
|
data = (
|
|
# si_signo si_errno si_code
|
|
"\x11\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"
|
|
# si_pid si_uid si_status
|
|
"\x49\x43\x07\x00\xe8\x03\x00\x00\x0c\x00\x00\x00"
|
|
+ "\x00" * 104
|
|
)
|
|
expected = {
|
|
"si_signo": 17, # SIGCHLD
|
|
"si_errno": 0,
|
|
"si_code": 1, # CLD_EXITED
|
|
"_sifields._sigchld.si_pid": 475977,
|
|
"_sifields._sigchld.si_uid": 1000,
|
|
"_sifields._sigchld.si_status": 12,
|
|
"_sifields._sigchld.si_utime": 0,
|
|
"_sifields._sigchld.si_stime": 0,
|
|
}
|
|
self.do_siginfo_test("remote-linux", "basic_eh_frame-i386.yaml", data, expected)
|
|
|
|
def test_siginfo_freebsd_amd64(self):
|
|
data = (
|
|
# si_signo si_errno si_code
|
|
"\x0b\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"
|
|
# si_pid si_uid si_status
|
|
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
|
|
# si_addr
|
|
"\x76\x98\xba\xdc\xfe\x00\x00\x00"
|
|
# si_status si_trapno
|
|
"\x00\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x00\x00"
|
|
+ "\x00" * 36
|
|
)
|
|
|
|
expected = {
|
|
"si_signo": 11, # SIGSEGV
|
|
"si_errno": 0,
|
|
"si_code": 1, # SEGV_MAPERR
|
|
"si_addr": 0xFEDCBA9876,
|
|
"_reason._fault._trapno": 12,
|
|
}
|
|
self.do_siginfo_test("remote-freebsd", "basic_eh_frame.yaml", data, expected)
|