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e43482b626
LLDB don't detect the loading of a shared object file linked against the main executable before the static initializers are executed for the given module. Because of this it is not possible to get breakpoint hits in these static initializers and to display proper debug info in case of a crash in these codes. llvm-svn: 255342
358 lines
15 KiB
Python
358 lines
15 KiB
Python
"""
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Test that breakpoint by symbol name works correctly with dynamic libs.
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"""
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from __future__ import print_function
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import os, time
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import re
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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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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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class LoadUnloadTestCase(TestBase):
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def getCategories (self):
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return ['basic_process']
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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 for main.cpp.
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self.line = line_number('main.cpp',
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'// Set break point at this line for test_lldb_process_load_and_unload_commands().')
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self.line_d_function = line_number('d.cpp',
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'// Find this line number within d_dunction().')
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if not self.platformIsDarwin():
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if not lldb.remote_platform and "LD_LIBRARY_PATH" in os.environ:
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self.runCmd("settings set target.env-vars " + self.dylibPath + "=" + os.environ["LD_LIBRARY_PATH"] + ":" + os.getcwd())
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else:
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if lldb.remote_platform:
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wd = lldb.remote_platform.GetWorkingDirectory()
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else:
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wd = os.getcwd()
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self.runCmd("settings set target.env-vars " + self.dylibPath + "=" + wd)
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def copy_shlibs_to_remote(self, hidden_dir=False):
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""" Copies the shared libs required by this test suite to remote.
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Does nothing in case of non-remote platforms.
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"""
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if lldb.remote_platform:
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cwd = os.getcwd()
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shlibs = ['libloadunload_a.so', 'libloadunload_b.so',
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'libloadunload_c.so', 'libloadunload_d.so']
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wd = lldb.remote_platform.GetWorkingDirectory()
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for f in shlibs:
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err = lldb.remote_platform.Put(
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lldb.SBFileSpec(os.path.join(cwd, f)),
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lldb.SBFileSpec(os.path.join(wd, f)))
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if err.Fail():
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raise RuntimeError(
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"Unable copy '%s' to '%s'.\n>>> %s" %
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(f, wd, err.GetCString()))
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if hidden_dir:
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shlib = 'libloadunload_d.so'
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hidden_dir = os.path.join(wd, 'hidden')
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hidden_file = os.path.join(hidden_dir, shlib)
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err = lldb.remote_platform.MakeDirectory(hidden_dir)
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if err.Fail():
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raise RuntimeError(
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"Unable to create a directory '%s'." % hidden_dir)
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err = lldb.remote_platform.Put(
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lldb.SBFileSpec(os.path.join(cwd, 'hidden', shlib)),
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lldb.SBFileSpec(hidden_file))
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if err.Fail():
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raise RuntimeError(
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"Unable copy 'libloadunload_d.so' to '%s'.\n>>> %s" %
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(wd, err.GetCString()))
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@not_remote_testsuite_ready
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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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def test_modules_search_paths(self):
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"""Test target modules list after loading a different copy of the library libd.dylib, and verifies that it works with 'target modules search-paths add'."""
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# Invoke the default build rule.
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self.build()
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if self.platformIsDarwin():
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dylibName = 'libloadunload_d.dylib'
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else:
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dylibName = 'libloadunload_d.so'
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# The directory with the dynamic library we did not link to.
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new_dir = os.path.join(os.getcwd(), "hidden")
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old_dylib = os.path.join(os.getcwd(), dylibName)
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new_dylib = os.path.join(new_dir, dylibName)
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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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self.expect("target modules list",
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substrs = [old_dylib])
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#self.expect("target modules list -t 3",
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# patterns = ["%s-[^-]*-[^-]*" % self.getArchitecture()])
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# Add an image search path substitution pair.
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self.runCmd("target modules search-paths add %s %s" % (os.getcwd(), new_dir))
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self.expect("target modules search-paths list",
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substrs = [os.getcwd(), new_dir])
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self.expect("target modules search-paths query %s" % os.getcwd(), "Image search path successfully transformed",
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substrs = [new_dir])
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# Obliterate traces of libd from the old location.
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os.remove(old_dylib)
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# Inform (DY)LD_LIBRARY_PATH of the new path, too.
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env_cmd_string = "settings set target.env-vars " + self.dylibPath + "=" + new_dir
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if self.TraceOn():
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print("Set environment to: ", env_cmd_string)
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self.runCmd(env_cmd_string)
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self.runCmd("settings show target.env-vars")
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remove_dyld_path_cmd = "settings remove target.env-vars " + self.dylibPath
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self.addTearDownHook(lambda: self.dbg.HandleCommand(remove_dyld_path_cmd))
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self.runCmd("run")
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self.expect("target modules list", "LLDB successfully locates the relocated dynamic library",
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substrs = [new_dylib])
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@skipUnlessListedRemote(['android'])
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@expectedFailureAndroid # wrong source file shows up for hidden library
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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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def test_dyld_library_path(self):
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"""Test (DY)LD_LIBRARY_PATH after moving libd.dylib, which defines d_function, somewhere else."""
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# Invoke the default build rule.
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self.build()
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self.copy_shlibs_to_remote(hidden_dir=True)
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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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if self.platformIsDarwin():
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dylibName = 'libloadunload_d.dylib'
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dsymName = 'libloadunload_d.dylib.dSYM'
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else:
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dylibName = 'libloadunload_d.so'
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# The directory to relocate the dynamic library and its debugging info.
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special_dir = "hidden"
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if lldb.remote_platform:
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wd = lldb.remote_platform.GetWorkingDirectory()
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else:
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wd = os.getcwd()
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old_dir = wd
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new_dir = os.path.join(wd, special_dir)
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old_dylib = os.path.join(old_dir, dylibName)
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remove_dyld_path_cmd = "settings remove target.env-vars " + self.dylibPath
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self.addTearDownHook(lambda: self.dbg.HandleCommand(remove_dyld_path_cmd))
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# For now we don't track (DY)LD_LIBRARY_PATH, so the old library will be in
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# the modules list.
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self.expect("target modules list",
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substrs = [os.path.basename(old_dylib)],
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matching=True)
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lldbutil.run_break_set_by_file_and_line (self, "d.cpp", self.line_d_function, num_expected_locations=1)
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# After run, make sure the non-hidden library is picked up.
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self.expect("run", substrs=["return", "700"])
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self.runCmd("continue")
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# Add the hidden directory first in the search path.
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env_cmd_string = ("settings set target.env-vars %s=%s" %
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(self.dylibPath, new_dir))
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if not self.platformIsDarwin():
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env_cmd_string += ":" + wd
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self.runCmd(env_cmd_string)
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# This time, the hidden library should be picked up.
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self.expect("run", substrs=["return", "12345"])
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@expectedFailureAll(bugnumber="llvm.org/pr25805", hostoslist=["windows"], compiler="gcc", archs=["i386"], triple='.*-android')
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@skipUnlessListedRemote(['android'])
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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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def test_lldb_process_load_and_unload_commands(self):
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"""Test that lldb process load/unload command work correctly."""
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# Invoke the default build rule.
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self.build()
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self.copy_shlibs_to_remote()
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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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# Break at main.cpp before the call to dlopen().
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# Use lldb's process load command to load the dylib, instead.
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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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if lldb.remote_platform:
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shlib_dir = lldb.remote_platform.GetWorkingDirectory()
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else:
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shlib_dir = self.mydir
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if self.platformIsDarwin():
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dylibName = 'libloadunload_a.dylib'
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else:
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dylibName = 'libloadunload_a.so'
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# Make sure that a_function does not exist at this point.
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self.expect("image lookup -n a_function", "a_function should not exist yet",
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error=True, matching=False, patterns = ["1 match found"])
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# Use lldb 'process load' to load the dylib.
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self.expect("process load %s --install" % dylibName, "%s loaded correctly" % dylibName,
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patterns = ['Loading "%s".*ok' % dylibName,
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'Image [0-9]+ loaded'])
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# Search for and match the "Image ([0-9]+) loaded" pattern.
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output = self.res.GetOutput()
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pattern = re.compile("Image ([0-9]+) loaded")
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for l in output.split(os.linesep):
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#print("l:", l)
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match = pattern.search(l)
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if match:
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break
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index = match.group(1)
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# Now we should have an entry for a_function.
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self.expect("image lookup -n a_function", "a_function should now exist",
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patterns = ["1 match found .*%s" % dylibName])
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# Use lldb 'process unload' to unload the dylib.
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self.expect("process unload %s" % index, "%s unloaded correctly" % dylibName,
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patterns = ["Unloading .* with index %s.*ok" % index])
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self.runCmd("process continue")
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@skipUnlessListedRemote(['android'])
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def test_load_unload(self):
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"""Test breakpoint by name works correctly with dlopen'ing."""
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# Invoke the default build rule.
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self.build()
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self.copy_shlibs_to_remote()
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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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# Break by function name a_function (not yet loaded).
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lldbutil.run_break_set_by_symbol (self, "a_function", num_expected_locations=0)
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self.runCmd("run", RUN_SUCCEEDED)
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# The stop reason of the thread should be breakpoint and at a_function.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'a_function',
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'stop reason = breakpoint'])
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# The breakpoint should have a hit count of 1.
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self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
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substrs = [' resolved, hit count = 1'])
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# Issue the 'contnue' command. We should stop agaian at a_function.
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# The stop reason of the thread should be breakpoint and at a_function.
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self.runCmd("continue")
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# rdar://problem/8508987
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# The a_function breakpoint should be encountered twice.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'a_function',
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'stop reason = breakpoint'])
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# The breakpoint should have a hit count of 2.
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self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
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substrs = [' resolved, hit count = 2'])
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@skipUnlessListedRemote(['android'])
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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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def test_step_over_load (self):
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"""Test stepping over code that loads a shared library works correctly."""
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# Invoke the default build rule.
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self.build()
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self.copy_shlibs_to_remote()
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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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# Break by function name a_function (not yet loaded).
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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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# The stop reason of the thread should be breakpoint and at a_function.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'stop reason = breakpoint'])
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self.runCmd("thread step-over", "Stepping over function that loads library")
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# The stop reason should be step end.
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self.expect("thread list", "step over succeeded.",
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substrs = ['stopped',
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'stop reason = step over'])
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@skipIfFreeBSD # llvm.org/pr14424 - missing FreeBSD Makefiles/testcase support
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@skipUnlessListedRemote(['android'])
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@skipIfWindows # Windows doesn't have dlopen and friends, dynamic libraries work differently
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@unittest2.expectedFailure("llvm.org/pr25806")
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def test_static_init_during_load (self):
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"""Test that we can set breakpoints correctly in static initializers"""
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self.build()
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self.copy_shlibs_to_remote()
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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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a_init_bp_num = lldbutil.run_break_set_by_symbol(self, "a_init", num_expected_locations=0)
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b_init_bp_num = lldbutil.run_break_set_by_symbol(self, "b_init", num_expected_locations=0)
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d_init_bp_num = lldbutil.run_break_set_by_symbol(self, "d_init", num_expected_locations=1)
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self.runCmd("run", RUN_SUCCEEDED)
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'd_init',
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'stop reason = breakpoint %d' % d_init_bp_num])
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self.runCmd("continue")
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'a_init',
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'stop reason = breakpoint %d' % a_init_bp_num])
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self.expect("thread backtrace",
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substrs = ['a_init',
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'dlopen',
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'main'])
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self.runCmd("continue")
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'b_init',
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'stop reason = breakpoint %d' % b_init_bp_num])
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self.expect("thread backtrace",
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substrs = ['b_init',
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'dlopen',
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'main'])
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