1"""
2Test the lldb disassemble command on lib stdc++.
3"""
4
5from __future__ import print_function
6
7
8import unittest2
9import os
10import lldb
11from lldbsuite.test.lldbtest import *
12import lldbsuite.test.lldbutil as lldbutil
13from lldbsuite.test.decorators import *
14
15class StdCXXDisassembleTestCase(TestBase):
16
17    @skipIfWindows
18    def test_stdcxx_disasm(self):
19        """Do 'disassemble' on each and every 'Code' symbol entry from the std c++ lib."""
20        self.build()
21        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self, "// Set break point at this line", lldb.SBFileSpec("main.cpp"))
22
23        # Disassemble the functions on the call stack.
24        self.runCmd("thread backtrace")
25        thread = lldbutil.get_stopped_thread(
26            process, lldb.eStopReasonBreakpoint)
27        self.assertIsNotNone(thread)
28        depth = thread.GetNumFrames()
29        for i in range(depth - 1):
30            frame = thread.GetFrameAtIndex(i)
31            function = frame.GetFunction()
32            if function.GetName():
33                self.runCmd("disassemble -n '%s'" % function.GetName())
34
35        lib_stdcxx = "FAILHORRIBLYHERE"
36        # Iterate through the available modules, looking for stdc++ library...
37        for i in range(target.GetNumModules()):
38            module = target.GetModuleAtIndex(i)
39            fs = module.GetFileSpec()
40            if (fs.GetFilename().startswith("libstdc++")
41                    or fs.GetFilename().startswith("libc++")):
42                lib_stdcxx = str(fs)
43                break
44
45        # At this point, lib_stdcxx is the full path to the stdc++ library and
46        # module is the corresponding SBModule.
47
48        self.expect(lib_stdcxx, "Libraray StdC++ is located", exe=False,
49                    substrs=["lib"])
50
51        self.runCmd("image dump symtab '%s'" % lib_stdcxx)
52        raw_output = self.res.GetOutput()
53        # Now, look for every 'Code' symbol and feed its load address into the
54        # command: 'disassemble -s load_address -e end_address', where the
55        # end_address is taken from the next consecutive 'Code' symbol entry's
56        # load address.
57        #
58        # The load address column comes after the file address column, with both
59        # looks like '0xhhhhhhhh', i.e., 8 hexadecimal digits.
60        codeRE = re.compile(r"""
61                             \ Code\ {9}      # ' Code' followed by 9 SPCs,
62                             0x[0-9a-f]{16}   # the file address column, and
63                             \                # a SPC, and
64                             (0x[0-9a-f]{16}) # the load address column, and
65                             .*               # the rest.
66                             """, re.VERBOSE)
67        # Maintain a start address variable; if we arrive at a consecutive Code
68        # entry, then the load address of the that entry is fed as the end
69        # address to the 'disassemble -s SA -e LA' command.
70        SA = None
71        for line in raw_output.split(os.linesep):
72            match = codeRE.search(line)
73            if match:
74                LA = match.group(1)
75                if self.TraceOn():
76                    print("line:", line)
77                    print("load address:", LA)
78                    print("SA:", SA)
79                if SA and LA:
80                    if int(LA, 16) > int(SA, 16):
81                        self.runCmd("disassemble -s %s -e %s" % (SA, LA))
82                SA = LA
83            else:
84                # This entry is not a Code entry.  Reset SA = None.
85                SA = None
86