86 lines · python
1"""2Test the lldb disassemble command on lib stdc++.3"""4 5import os6import re7import lldb8from lldbsuite.test.lldbtest import *9import lldbsuite.test.lldbutil as lldbutil10from lldbsuite.test.decorators import *11 12 13class StdCXXDisassembleTestCase(TestBase):14 @skipIfWindows15 def test_stdcxx_disasm(self):16 """Do 'disassemble' on each and every 'Code' symbol entry from the std c++ lib."""17 self.build()18 (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(19 self, "// Set break point at this line", lldb.SBFileSpec("main.cpp")20 )21 22 # Disassemble the functions on the call stack.23 self.runCmd("thread backtrace")24 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)25 self.assertIsNotNone(thread)26 depth = thread.GetNumFrames()27 for i in range(depth - 1):28 frame = thread.GetFrameAtIndex(i)29 function = frame.GetFunction()30 if function.GetName():31 self.runCmd("disassemble -n '%s'" % function.GetName())32 33 lib_stdcxx = "FAILHORRIBLYHERE"34 # Find the stdc++ library...35 stdlib_regex = re.compile(r"/lib(std)?c\+\+")36 for module in target.module[stdlib_regex]:37 lib_stdcxx = module.file.fullpath38 break39 40 # At this point, lib_stdcxx is the full path to the stdc++ library and41 # module is the corresponding SBModule.42 43 if "lib" not in lib_stdcxx:44 self.skipTest(45 "This test requires libstdc++.so or libc++.dylib in the target's module list."46 )47 48 self.runCmd("image dump symtab '%s'" % lib_stdcxx)49 raw_output = self.res.GetOutput()50 # Now, look for every 'Code' symbol and feed its load address into the51 # command: 'disassemble -s load_address -e end_address', where the52 # end_address is taken from the next consecutive 'Code' symbol entry's53 # load address.54 #55 # The load address column comes after the file address column, with both56 # looks like '0xhhhhhhhh', i.e., 8 hexadecimal digits.57 codeRE = re.compile(58 r"""59 \ Code\ {9} # ' Code' followed by 9 SPCs,60 0x[0-9a-f]{16} # the file address column, and61 \ # a SPC, and62 (0x[0-9a-f]{16}) # the load address column, and63 .* # the rest.64 """,65 re.VERBOSE,66 )67 # Maintain a start address variable; if we arrive at a consecutive Code68 # entry, then the load address of the that entry is fed as the end69 # address to the 'disassemble -s SA -e LA' command.70 SA = None71 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 = LA83 else:84 # This entry is not a Code entry. Reset SA = None.85 SA = None86