teak-llvm/lldb/packages/Python/lldbsuite/test/functionalities/breakpoint/cpp/TestCPPBreakpointLocations.py
Pavel Labath 5c17454cd6 Make destructor breakpoint location test more resilient
Summary:
The original breakpoint location test was failing for linux, because the compilers here tend to
merge the full-object and subobject destructors even at -O0 (as a result, we are getting only 2
breakpoint locations, and not 4 as the test expected. The fixup in r266164 substantially weakened
the test, as it now did not check whether both kinds of destructors were being found.

Because of these contraints, I have altered the logic of the test. It sets the
breakpoint by name, and then independently verifies that the breakpoint is set on the correct
demangled symbol name (which is not very meaningful since both kinds of destructors demangle to
the same name) *and* the correct symbol address (which is obtained by looking up the mangled
symbol name).

Reviewers: clayborg

Subscribers: ovyalov, zturner, lldb-commits

Differential Revision: http://reviews.llvm.org/D19052

llvm-svn: 266416
2016-04-15 09:11:22 +00:00

96 lines
4.0 KiB
Python

"""
Test lldb breakpoint ids.
"""
from __future__ import print_function
import os, time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class TestCPPBreakpointLocations(TestBase):
mydir = TestBase.compute_mydir(__file__)
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
def test (self):
self.build ()
self.breakpoint_id_tests ()
def verify_breakpoint_locations(self, target, bp_dict):
name = bp_dict['name']
names = bp_dict['loc_names']
bp = target.BreakpointCreateByName (name)
self.assertEquals(bp.GetNumLocations(), len(names), "Make sure we find the right number of breakpoint locations")
bp_loc_names = list()
for bp_loc in bp:
bp_loc_names.append(bp_loc.GetAddress().GetFunction().GetName())
for name in names:
found = name in bp_loc_names
if not found:
print("Didn't find '%s' in: %s" % (name, bp_loc_names))
self.assertTrue (found, "Make sure we find all required locations")
def breakpoint_id_tests (self):
# Create a target by the debugger.
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
bp_dicts = [
{ 'name' : 'func1', 'loc_names' : [ 'a::c::func1()', 'b::c::func1()'] },
{ 'name' : 'func2', 'loc_names' : [ 'a::c::func2()', 'c::d::func2()'] },
{ 'name' : 'func3', 'loc_names' : [ 'a::c::func3()', 'b::c::func3()', 'c::d::func3()'] },
{ 'name' : 'c::func1', 'loc_names' : [ 'a::c::func1()', 'b::c::func1()'] },
{ 'name' : 'c::func2', 'loc_names' : [ 'a::c::func2()'] },
{ 'name' : 'c::func3', 'loc_names' : [ 'a::c::func3()', 'b::c::func3()'] },
{ 'name' : 'a::c::func1', 'loc_names' : [ 'a::c::func1()'] },
{ 'name' : 'b::c::func1', 'loc_names' : [ 'b::c::func1()'] },
{ 'name' : 'c::d::func2', 'loc_names' : [ 'c::d::func2()'] },
{ 'name' : 'a::c::func1()', 'loc_names' : [ 'a::c::func1()'] },
{ 'name' : 'b::c::func1()', 'loc_names' : [ 'b::c::func1()'] },
{ 'name' : 'c::d::func2()', 'loc_names' : [ 'c::d::func2()'] },
]
for bp_dict in bp_dicts:
self.verify_breakpoint_locations(target, bp_dict)
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
def test_destructors(self):
self.build()
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
# Don't skip prologue, so we can check the breakpoint address more easily
self.runCmd("settings set target.skip-prologue false")
try:
names = ['~c', 'c::~c', 'c::~c()']
loc_names = {'a::c::~c()', 'b::c::~c()'}
# TODO: For windows targets we should put windows mangled names here
symbols = ['_ZN1a1cD1Ev', '_ZN1a1cD2Ev', '_ZN1b1cD1Ev', '_ZN1b1cD2Ev']
for name in names:
bp = target.BreakpointCreateByName(name)
bp_loc_names = { bp_loc.GetAddress().GetFunction().GetName() for bp_loc in bp }
self.assertEquals(bp_loc_names, loc_names, "Breakpoint set on the correct symbol")
bp_addresses = { bp_loc.GetLoadAddress() for bp_loc in bp }
symbol_addresses = set()
for symbol in symbols:
sc_list = target.FindSymbols(symbol, lldb.eSymbolTypeCode)
self.assertEquals(sc_list.GetSize(), 1, "Found symbol " + symbol)
symbol = sc_list.GetContextAtIndex(0).GetSymbol()
symbol_addresses.add(symbol.GetStartAddress().GetLoadAddress(target))
self.assertEquals(symbol_addresses, bp_addresses, "Breakpoint set on correct address")
finally:
self.runCmd("settings clear target.skip-prologue")