1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
"""
Test the lldb disassemble command on lib stdc++.
"""
import os
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.decorators import *
class StdCXXDisassembleTestCase(TestBase):
@skipIfWindows
def test_stdcxx_disasm(self):
"""Do 'disassemble' on each and every 'Code' symbol entry from the std c++ lib."""
self.build()
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "// Set break point at this line", lldb.SBFileSpec("main.cpp")
)
# Disassemble the functions on the call stack.
self.runCmd("thread backtrace")
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertIsNotNone(thread)
depth = thread.GetNumFrames()
for i in range(depth - 1):
frame = thread.GetFrameAtIndex(i)
function = frame.GetFunction()
if function.GetName():
self.runCmd("disassemble -n '%s'" % function.GetName())
lib_stdcxx = "FAILHORRIBLYHERE"
# Iterate through the available modules, looking for stdc++ library...
for i in range(target.GetNumModules()):
module = target.GetModuleAtIndex(i)
fs = module.GetFileSpec()
if fs.GetFilename().startswith("libstdc++") or fs.GetFilename().startswith(
"libc++"
):
lib_stdcxx = str(fs)
break
# At this point, lib_stdcxx is the full path to the stdc++ library and
# module is the corresponding SBModule.
self.expect(
lib_stdcxx, "Libraray StdC++ is located", exe=False, substrs=["lib"]
)
self.runCmd("image dump symtab '%s'" % lib_stdcxx)
raw_output = self.res.GetOutput()
# Now, look for every 'Code' symbol and feed its load address into the
# command: 'disassemble -s load_address -e end_address', where the
# end_address is taken from the next consecutive 'Code' symbol entry's
# load address.
#
# The load address column comes after the file address column, with both
# looks like '0xhhhhhhhh', i.e., 8 hexadecimal digits.
codeRE = re.compile(
r"""
\ Code\ {9} # ' Code' followed by 9 SPCs,
0x[0-9a-f]{16} # the file address column, and
\ # a SPC, and
(0x[0-9a-f]{16}) # the load address column, and
.* # the rest.
""",
re.VERBOSE,
)
# Maintain a start address variable; if we arrive at a consecutive Code
# entry, then the load address of the that entry is fed as the end
# address to the 'disassemble -s SA -e LA' command.
SA = None
for line in raw_output.split(os.linesep):
match = codeRE.search(line)
if match:
LA = match.group(1)
if self.TraceOn():
print("line:", line)
print("load address:", LA)
print("SA:", SA)
if SA and LA:
if int(LA, 16) > int(SA, 16):
self.runCmd("disassemble -s %s -e %s" % (SA, LA))
SA = LA
else:
# This entry is not a Code entry. Reset SA = None.
SA = None
|
