8691dc5b75
The problem was that SBTarget::ReadMemory() was making a new section offset lldb_private::Address by doing:
size_t
SBTarget::ReadMemory (const SBAddress addr,
void *buf,
size_t size,
lldb::SBError &error)
{
...
lldb_private::Address addr_priv(addr.GetFileAddress(), NULL);
bytes_read = target_sp->ReadMemory(addr_priv, false, buf, size, err_priv);
This is wrong. If you get the file addresss from the "addr" argument and try to read memory using that, it will think the file address is a load address and it will try to resolve it accordingly. This will work fine if your executable is loaded at the same address (no slide), but it won't work if there is a slide.
The fix is to just pass along the "addr.ref()" instead of making a new addr_priv as this will pass along the lldb_private::Address that is inside the SBAddress (which is what we want), and not always change it into something that becomes a load address (if we are running), or abmigious file address (think address zero when you have 150 shared libraries that have sections that start at zero, which one would you pick). The main reason for passing a section offset address to SBTarget::ReadMemory() is so you _can_ read from the actual section + offset that is specified in the SBAddress.
llvm-svn: 221213
477 lines
18 KiB
Python
477 lines
18 KiB
Python
"""
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Test SBTarget APIs.
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"""
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import os, time
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import re
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import unittest2
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import lldb, lldbutil
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from lldbtest import *
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class TargetAPITestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_find_global_variables_with_dsym(self):
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"""Exercise SBTaget.FindGlobalVariables() API."""
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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self.find_global_variables('a.out')
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#rdar://problem/9700873
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# Find global variable value fails for dwarf if inferior not started
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# (Was CrashTracer: [USER] 1 crash in Python at _lldb.so: lldb_private::MemoryCache::Read + 94)
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#
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# It does not segfaults now. But for dwarf, the variable value is None if
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# the inferior process does not exist yet. The radar has been updated.
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#@unittest232.skip("segmentation fault -- skipping")
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@python_api_test
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@dwarf_test
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def test_find_global_variables_with_dwarf(self):
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"""Exercise SBTarget.FindGlobalVariables() API."""
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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self.find_global_variables('b.out')
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_find_functions_with_dsym(self):
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"""Exercise SBTaget.FindFunctions() API."""
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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self.find_functions('a.out')
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@python_api_test
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@dwarf_test
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def test_find_functions_with_dwarf(self):
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"""Exercise SBTarget.FindFunctions() API."""
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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self.find_functions('b.out')
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_get_description_with_dsym(self):
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"""Exercise SBTaget.GetDescription() API."""
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self.buildDsym()
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self.get_description()
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@python_api_test
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@dwarf_test
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def test_get_description_with_dwarf(self):
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"""Exercise SBTarget.GetDescription() API."""
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self.buildDwarf()
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self.get_description()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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@expectedFailureDarwin("llvm.org/pr20273")
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def test_launch_new_process_and_redirect_stdout_with_dsym(self):
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"""Exercise SBTaget.Launch() API."""
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self.buildDsym()
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self.launch_new_process_and_redirect_stdout()
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@python_api_test
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@dwarf_test
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@expectedFailureDarwin("llvm.org/pr20273")
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def test_launch_new_process_and_redirect_stdout_with_dwarf(self):
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"""Exercise SBTarget.Launch() API."""
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self.buildDwarf()
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self.launch_new_process_and_redirect_stdout()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_resolve_symbol_context_with_address_with_dsym(self):
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"""Exercise SBTaget.ResolveSymbolContextForAddress() API."""
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self.buildDsym()
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self.resolve_symbol_context_with_address()
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@python_api_test
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@dwarf_test
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def test_resolve_symbol_context_with_address_with_dwarf(self):
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"""Exercise SBTarget.ResolveSymbolContextForAddress() API."""
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self.buildDwarf()
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self.resolve_symbol_context_with_address()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_get_platform_with_dsym(self):
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('a.out')
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platform = target.platform
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self.assertTrue(platform, VALID_PLATFORM)
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@python_api_test
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@dwarf_test
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def test_get_platform_with_dwarf(self):
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('b.out')
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platform = target.platform
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self.assertTrue(platform, VALID_PLATFORM)
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_get_data_byte_size_with_dsym(self):
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('a.out')
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self.assertEquals(target.data_byte_size, 1)
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@python_api_test
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@dwarf_test
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def test_get_data_byte_size_with_dwarf(self):
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('b.out')
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self.assertEquals(target.data_byte_size, 1)
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_get_code_byte_size_with_dsym(self):
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('a.out')
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self.assertEquals(target.code_byte_size, 1)
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@python_api_test
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@dwarf_test
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def test_get_code_byte_size_with_dwarf(self):
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('b.out')
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self.assertEquals(target.code_byte_size, 1)
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_resolve_file_address_with_dsym(self):
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('a.out')
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self.resolve_file_address(target)
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@python_api_test
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@dwarf_test
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def test_resolve_file_address_with_dwarf(self):
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('b.out')
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self.resolve_file_address(target)
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_read_memory_with_dsym(self):
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d = {'EXE': 'a.out'}
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self.buildDsym(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('a.out')
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self.read_memory(target)
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@python_api_test
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@dwarf_test
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def test_read_memory_with_dwarf(self):
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d = {'EXE': 'b.out'}
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self.buildDwarf(dictionary=d)
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self.setTearDownCleanup(dictionary=d)
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target = self.create_simple_target('b.out')
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self.read_memory(target)
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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 of function 'c'.
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self.line1 = line_number('main.c', '// Find the line number for breakpoint 1 here.')
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self.line2 = line_number('main.c', '// Find the line number for breakpoint 2 here.')
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self.line_main = line_number("main.c", "// Set a break at entry to main.")
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def read_memory(self, target):
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breakpoint = target.BreakpointCreateByLocation("main.c", self.line_main)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Put debugger into synchronous mode so when we target.LaunchSimple returns
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# it will guaranteed to be at the breakpoint
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self.dbg.SetAsync(False)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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# find the file address in the .data section of the main
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# module
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data_section = self.find_data_section(target)
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sb_addr = lldb.SBAddress(data_section, 0)
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error = lldb.SBError()
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content = target.ReadMemory(sb_addr, 1, error)
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self.assertTrue(error.Success(), "Make sure memory read succeeded")
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self.assertEquals(len(content), 1)
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def create_simple_target(self, fn):
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exe = os.path.join(os.getcwd(), fn)
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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return target
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def resolve_file_address(self, target):
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# find the file address in the .data section of the main
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# module
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data_section = self.find_data_section(target)
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data_section_addr = data_section.file_addr
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# resolve the above address, and compare the address produced
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# by the resolution against the original address/section
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res_file_addr = target.ResolveFileAddress(data_section_addr)
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self.assertTrue(res_file_addr.IsValid())
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self.assertEquals(data_section_addr, res_file_addr.file_addr)
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data_section2 = res_file_addr.section
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self.assertIsNotNone(data_section2)
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self.assertEquals(data_section.name, data_section2.name)
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def find_data_section(self, target):
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mod = target.GetModuleAtIndex(0)
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data_section = None
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for s in mod.sections:
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sect_type = s.GetSectionType()
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if sect_type == lldb.eSectionTypeData:
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data_section = s
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break
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elif sect_type == lldb.eSectionTypeContainer:
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for i in range(s.GetNumSubSections()):
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ss = s.GetSubSectionAtIndex(i)
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sect_type = ss.GetSectionType()
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if sect_type == lldb.eSectionTypeData:
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data_section = ss
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break
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self.assertIsNotNone(data_section)
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return data_section
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def find_global_variables(self, exe_name):
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"""Exercise SBTaget.FindGlobalVariables() API."""
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exe = os.path.join(os.getcwd(), exe_name)
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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#rdar://problem/9700873
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# Find global variable value fails for dwarf if inferior not started
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# (Was CrashTracer: [USER] 1 crash in Python at _lldb.so: lldb_private::MemoryCache::Read + 94)
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#
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# Remove the lines to create a breakpoint and to start the inferior
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# which are workarounds for the dwarf case.
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breakpoint = target.BreakpointCreateByLocation('main.c', self.line1)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Now launch the process, and do not stop at entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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# Make sure we hit our breakpoint:
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thread_list = lldbutil.get_threads_stopped_at_breakpoint (process, breakpoint)
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self.assertTrue (len(thread_list) == 1)
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value_list = target.FindGlobalVariables('my_global_var_of_char_type', 3)
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self.assertTrue(value_list.GetSize() == 1)
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my_global_var = value_list.GetValueAtIndex(0)
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self.DebugSBValue(my_global_var)
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self.assertTrue(my_global_var)
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self.expect(my_global_var.GetName(), exe=False,
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startstr = "my_global_var_of_char_type")
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self.expect(my_global_var.GetTypeName(), exe=False,
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startstr = "char")
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self.expect(my_global_var.GetValue(), exe=False,
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startstr = "'X'")
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# While we are at it, let's also exercise the similar SBModule.FindGlobalVariables() API.
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for m in target.module_iter():
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if m.GetFileSpec().GetDirectory() == os.getcwd() and m.GetFileSpec().GetFilename() == exe_name:
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value_list = m.FindGlobalVariables(target, 'my_global_var_of_char_type', 3)
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self.assertTrue(value_list.GetSize() == 1)
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self.assertTrue(value_list.GetValueAtIndex(0).GetValue() == "'X'")
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break
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def find_functions(self, exe_name):
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"""Exercise SBTaget.FindFunctions() API."""
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exe = os.path.join(os.getcwd(), exe_name)
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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list = target.FindFunctions('c', lldb.eFunctionNameTypeAuto)
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self.assertTrue(list.GetSize() == 1)
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for sc in list:
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self.assertTrue(sc.GetModule().GetFileSpec().GetFilename() == exe_name)
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self.assertTrue(sc.GetSymbol().GetName() == 'c')
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def get_description(self):
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"""Exercise SBTaget.GetDescription() API."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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from lldbutil import get_description
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# get_description() allows no option to mean lldb.eDescriptionLevelBrief.
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desc = get_description(target)
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#desc = get_description(target, option=lldb.eDescriptionLevelBrief)
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if not desc:
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self.fail("SBTarget.GetDescription() failed")
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self.expect(desc, exe=False,
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substrs = ['a.out'])
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self.expect(desc, exe=False, matching=False,
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substrs = ['Target', 'Module', 'Breakpoint'])
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desc = get_description(target, option=lldb.eDescriptionLevelFull)
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if not desc:
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self.fail("SBTarget.GetDescription() failed")
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self.expect(desc, exe=False,
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substrs = ['a.out', 'Target', 'Module', 'Breakpoint'])
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@not_remote_testsuite_ready
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def launch_new_process_and_redirect_stdout(self):
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"""Exercise SBTaget.Launch() API with redirected stdout."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Add an extra twist of stopping the inferior in a breakpoint, and then continue till it's done.
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# We should still see the entire stdout redirected once the process is finished.
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line = line_number('main.c', '// a(3) -> c(3)')
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breakpoint = target.BreakpointCreateByLocation('main.c', line)
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# Now launch the process, do not stop at entry point, and redirect stdout to "stdout.txt" file.
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# The inferior should run to completion after "process.Continue()" call.
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error = lldb.SBError()
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process = target.Launch (self.dbg.GetListener(), None, None, None, "stdout.txt", None, None, 0, False, error)
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process.Continue()
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#self.runCmd("process status")
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# The 'stdout.txt' file should now exist.
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self.assertTrue(os.path.isfile("stdout.txt"),
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"'stdout.txt' exists due to redirected stdout via SBTarget.Launch() API.")
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# Read the output file produced by running the program.
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with open('stdout.txt', 'r') as f:
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output = f.read()
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# Let's delete the 'stdout.txt' file as a cleanup step.
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try:
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os.remove("stdout.txt")
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pass
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except OSError:
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pass
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self.expect(output, exe=False,
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substrs = ["a(1)", "b(2)", "a(3)"])
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def resolve_symbol_context_with_address(self):
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"""Exercise SBTaget.ResolveSymbolContextForAddress() API."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Now create the two breakpoints inside function 'a'.
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breakpoint1 = target.BreakpointCreateByLocation('main.c', self.line1)
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breakpoint2 = target.BreakpointCreateByLocation('main.c', self.line2)
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#print "breakpoint1:", breakpoint1
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#print "breakpoint2:", breakpoint2
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self.assertTrue(breakpoint1 and
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breakpoint1.GetNumLocations() == 1,
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VALID_BREAKPOINT)
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self.assertTrue(breakpoint2 and
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breakpoint2.GetNumLocations() == 1,
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VALID_BREAKPOINT)
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# Now launch the process, and do not stop at entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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# Frame #0 should be on self.line1.
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self.assertTrue(process.GetState() == lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition")
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#self.runCmd("process status")
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frame0 = thread.GetFrameAtIndex(0)
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lineEntry = frame0.GetLineEntry()
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self.assertTrue(lineEntry.GetLine() == self.line1)
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address1 = lineEntry.GetStartAddress()
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# Continue the inferior, the breakpoint 2 should be hit.
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process.Continue()
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self.assertTrue(process.GetState() == lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition")
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#self.runCmd("process status")
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frame0 = thread.GetFrameAtIndex(0)
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|
lineEntry = frame0.GetLineEntry()
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self.assertTrue(lineEntry.GetLine() == self.line2)
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|
|
|
address2 = lineEntry.GetStartAddress()
|
|
|
|
#print "address1:", address1
|
|
#print "address2:", address2
|
|
|
|
# Now call SBTarget.ResolveSymbolContextForAddress() with the addresses from our line entry.
|
|
context1 = target.ResolveSymbolContextForAddress(address1, lldb.eSymbolContextEverything)
|
|
context2 = target.ResolveSymbolContextForAddress(address2, lldb.eSymbolContextEverything)
|
|
|
|
self.assertTrue(context1 and context2)
|
|
#print "context1:", context1
|
|
#print "context2:", context2
|
|
|
|
# Verify that the context point to the same function 'a'.
|
|
symbol1 = context1.GetSymbol()
|
|
symbol2 = context2.GetSymbol()
|
|
self.assertTrue(symbol1 and symbol2)
|
|
#print "symbol1:", symbol1
|
|
#print "symbol2:", symbol2
|
|
|
|
from lldbutil import get_description
|
|
desc1 = get_description(symbol1)
|
|
desc2 = get_description(symbol2)
|
|
self.assertTrue(desc1 and desc2 and desc1 == desc2,
|
|
"The two addresses should resolve to the same symbol")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
import atexit
|
|
lldb.SBDebugger.Initialize()
|
|
atexit.register(lambda: lldb.SBDebugger.Terminate())
|
|
unittest2.main()
|