1from __future__ import print_function
2import lldb
3from lldbsuite.test.lldbtest import *
4from lldbsuite.test.decorators import *
5from lldbsuite.test.gdbclientutils import *
6from lldbsuite.test.lldbgdbclient import GDBRemoteTestBase
7
8
9# This test case is testing three things:
10#
11#  1. three register values will be provided in the ? stop packet (T11) -
12#     registers 0 ("rax"), 1 ("rbx"), and 3 ("rip")
13#  2. ReadRegister packet will provide the value of register 2 ("rsi")
14#  3. The "g" read-all-registers packet is not supported; p must be used
15#     to get the value of register 2 ("rsi")
16#
17# Forcing lldb to use the expedited registers in the stop packet and
18# marking it an error to request that register value is to prevent
19# performance regressions.
20#
21# Some gdb RSP stubs only implement p/P, they do not support g/G.
22# lldb must be able to work with either.
23
24class TestNoGPacketSupported(GDBRemoteTestBase):
25
26    @skipIfXmlSupportMissing
27    def test(self):
28        class MyResponder(MockGDBServerResponder):
29            def haltReason(self):
30                return "T02thread:1ff0d;threads:1ff0d;thread-pcs:000000010001bc00;00:7882773ce0ffffff;01:1122334455667788;03:00bc010001000000;"
31
32            def threadStopInfo(self, threadnum):
33                return "T02thread:1ff0d;threads:1ff0d;thread-pcs:000000010001bc00;00:7882773ce0ffffff;01:1122334455667788;03:00bc010001000000;"
34
35            def writeRegisters(self):
36                return "E02"
37
38            def readRegisters(self):
39                return "E01"
40
41            def readRegister(self, regnum):
42                # lldb will try sending "p0" to see if the p packet is supported,
43                # give a bogus value; in theory lldb could use this value in the
44                # register context and that would be valid behavior.
45
46                # notably, don't give values for registers 1 & 3 -- lldb should
47                # get those from the ? stop packet ("T11") and it is a pref regression
48                # if lldb is asking for these register values.
49                if regnum == 0:
50                    return "5555555555555555"
51                if regnum == 2:
52                    return "c04825ebfe7f0000" # 0x00007ffeeb2548c0
53
54                return "E03"
55
56            def writeRegister(self, regnum):
57                return "OK"
58
59            def qXferRead(self, obj, annex, offset, length):
60                if annex == "target.xml":
61                    return """<?xml version="1.0"?>
62                        <target version="1.0">
63                          <architecture>i386:x86-64</architecture>
64                          <feature name="org.gnu.gdb.i386.core">
65                            <reg name="rax" bitsize="64" regnum="0" type="code_ptr" group="general"/>
66                            <reg name="rbx" bitsize="64" regnum="1" type="code_ptr" group="general"/>
67                            <reg name="rsi" bitsize="64" regnum="2" type="code_ptr" group="general"/>
68                            <reg name="rip" bitsize="64" regnum="3" type="code_ptr" group="general" altname="pc" generic="pc"/>
69                          </feature>
70                        </target>""", False
71                else:
72                    return None, False
73
74        self.server.responder = MyResponder()
75        target = self.dbg.CreateTarget('')
76        if self.TraceOn():
77          self.runCmd("log enable gdb-remote packets")
78          self.addTearDownHook(
79                lambda: self.runCmd("log disable gdb-remote packets"))
80        process = self.connect(target)
81
82        thread = process.GetThreadAtIndex(0)
83        frame = thread.GetFrameAtIndex(0)
84        rax = frame.FindRegister("rax").GetValueAsUnsigned()
85        rbx = frame.FindRegister("rbx").GetValueAsUnsigned()
86        rsi = frame.FindRegister("rsi").GetValueAsUnsigned()
87        pc = frame.GetPC()
88        rip = frame.FindRegister("rip").GetValueAsUnsigned()
89
90        if self.TraceOn():
91            print("Register values: rax == 0x%x, rbx == 0x%x, rsi == 0x%x, pc == 0x%x, rip == 0x%x" % (rax, rbx, rsi, pc, rip))
92
93        self.assertEqual(rax, 0xffffffe03c778278)
94        self.assertEqual(rbx, 0x8877665544332211)
95        self.assertEqual(rsi, 0x00007ffeeb2548c0)
96        self.assertEqual(pc, 0x10001bc00)
97        self.assertEqual(rip, 0x10001bc00)
98