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783550be62
Starting with Windows 10, the Windows loader is itself multi-threaded, meaning that the loader spins up a few threads to do process initialization before it executes main. Windows delivers these notifications asynchronously and they can come out of order, so we can't be sure that the first thread we get a notification about is actually the zero'th thread. This patch fixes this by requesting the thread stopped at the breakpoint that was specified, rather than getting thread 0 and verifying that it is stopped at a breakpoint. Differential Revision: http://reviews.llvm.org/D16247 llvm-svn: 258432
113 lines
4.5 KiB
Python
113 lines
4.5 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 = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertIsNotNone(thread)
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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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