112 lines
4.4 KiB
Python
112 lines
4.4 KiB
Python
"""
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Test the lldb disassemble command on lib stdc++.
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"""
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from __future__ import print_function
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import unittest2
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import os, time
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import lldb
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from lldbsuite.test.lldbtest import *
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import lldbsuite.test.lldbutil as lldbutil
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class StdCXXDisassembleTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break inside main().
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self.line = line_number('main.cpp', '// Set break point at this line.')
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# rdar://problem/8504895
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# Crash while doing 'disassemble -n "-[NSNumber descriptionWithLocale:]"
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@unittest2.skipIf(TestBase.skipLongRunningTest(), "Skip this long running test")
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def test_stdcxx_disasm(self):
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"""Do 'disassemble' on each and every 'Code' symbol entry from the std c++ lib."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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# rdar://problem/8543077
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# test/stl: clang built binaries results in the breakpoint locations = 3,
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# is this a problem with clang generated debug info?
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#
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# Break on line 13 of main.cpp.
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lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)
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self.runCmd("run", RUN_SUCCEEDED)
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# Now let's get the target as well as the process objects.
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target = self.dbg.GetSelectedTarget()
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process = target.GetProcess()
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# The process should be in a 'stopped' state.
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self.expect(str(process), STOPPED_DUE_TO_BREAKPOINT, exe=False,
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substrs = ["a.out",
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"stopped"])
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# Disassemble the functions on the call stack.
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self.runCmd("thread backtrace")
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thread = process.GetThreadAtIndex(0)
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depth = thread.GetNumFrames()
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for i in range(depth - 1):
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frame = thread.GetFrameAtIndex(i)
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function = frame.GetFunction()
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if function.GetName():
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self.runCmd("disassemble -n '%s'" % function.GetName())
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lib_stdcxx = "FAILHORRIBLYHERE"
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# Iterate through the available modules, looking for stdc++ library...
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for i in range(target.GetNumModules()):
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module = target.GetModuleAtIndex(i)
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fs = module.GetFileSpec()
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if (fs.GetFilename().startswith("libstdc++") or fs.GetFilename().startswith("libc++")):
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lib_stdcxx = str(fs)
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break
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# At this point, lib_stdcxx is the full path to the stdc++ library and
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# module is the corresponding SBModule.
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self.expect(lib_stdcxx, "Libraray StdC++ is located", exe=False,
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substrs = ["lib"])
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self.runCmd("image dump symtab '%s'" % lib_stdcxx)
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raw_output = self.res.GetOutput()
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# Now, look for every 'Code' symbol and feed its load address into the
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# command: 'disassemble -s load_address -e end_address', where the
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# end_address is taken from the next consecutive 'Code' symbol entry's
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# load address.
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#
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# The load address column comes after the file address column, with both
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# looks like '0xhhhhhhhh', i.e., 8 hexadecimal digits.
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codeRE = re.compile(r"""
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\ Code\ {9} # ' Code' followed by 9 SPCs,
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0x[0-9a-f]{16} # the file address column, and
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\ # a SPC, and
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(0x[0-9a-f]{16}) # the load address column, and
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.* # the rest.
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""", re.VERBOSE)
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# Maintain a start address variable; if we arrive at a consecutive Code
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# entry, then the load address of the that entry is fed as the end
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# address to the 'disassemble -s SA -e LA' command.
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SA = None
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for line in raw_output.split(os.linesep):
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match = codeRE.search(line)
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if match:
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LA = match.group(1)
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if self.TraceOn():
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print("line:", line)
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print("load address:", LA)
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print("SA:", SA)
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if SA and LA:
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if int(LA, 16) > int(SA, 16):
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self.runCmd("disassemble -s %s -e %s" % (SA, LA))
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SA = LA
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else:
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# This entry is not a Code entry. Reset SA = None.
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SA = None
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