| """ |
| Test lldb's ability to read and write the AArch64 TLS registers. |
| """ |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class AArch64LinuxTLSRegisters(TestBase): |
| NO_DEBUG_INFO_TESTCASE = True |
| |
| def setup(self, registers): |
| self.build() |
| self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET) |
| |
| lldbutil.run_break_set_by_file_and_line( |
| self, |
| "main.c", |
| line_number("main.c", "// Set break point at this line."), |
| num_expected_locations=1, |
| ) |
| |
| lldbutil.run_break_set_by_file_and_line( |
| self, |
| "main.c", |
| line_number("main.c", "// Set break point 2 at this line."), |
| num_expected_locations=1, |
| ) |
| |
| if "tpidr2" in registers: |
| self.runCmd("settings set target.run-args 1") |
| self.runCmd("run", RUN_SUCCEEDED) |
| |
| if self.process().GetState() == lldb.eStateExited: |
| self.fail("Test program failed to run.") |
| |
| self.expect( |
| "thread list", |
| STOPPED_DUE_TO_BREAKPOINT, |
| substrs=["stopped", "stop reason = breakpoint"], |
| ) |
| |
| def check_registers(self, registers, values): |
| regs = self.thread().GetSelectedFrame().GetRegisters() |
| tls_regs = regs.GetFirstValueByName("Thread Local Storage Registers") |
| self.assertTrue(tls_regs.IsValid(), "No TLS registers found.") |
| |
| for register in registers: |
| tls_reg = tls_regs.GetChildMemberWithName(register) |
| self.assertTrue( |
| tls_reg.IsValid(), "{} register not found.".format(register) |
| ) |
| self.assertEqual(tls_reg.GetValueAsUnsigned(), values[register]) |
| |
| def check_tls_reg(self, registers): |
| self.setup(registers) |
| |
| # Since we can't predict what the value will be, the program has set |
| # a target value for us to find. |
| initial_values = { |
| "tpidr": 0x1122334455667788, |
| "tpidr2": 0x8877665544332211, |
| } |
| |
| self.check_registers(registers, initial_values) |
| |
| # Their values should be restored if an expression modifies them. |
| self.runCmd("expression expr_func()") |
| |
| self.check_registers(registers, initial_values) |
| |
| set_values = { |
| "tpidr": 0x1111222233334444, |
| "tpidr2": 0x4444333322221111, |
| } |
| |
| # Set our own value(s) for the program to find. |
| for register in registers: |
| self.expect( |
| "register write {} 0x{:x}".format(register, set_values[register]) |
| ) |
| |
| self.expect("continue") |
| |
| self.expect( |
| "thread list", |
| STOPPED_DUE_TO_BREAKPOINT, |
| substrs=["stopped", "stop reason = breakpoint"], |
| ) |
| |
| for register in registers: |
| self.expect("p {}_was_set".format(register), substrs=["true"]) |
| |
| @skipUnlessArch("aarch64") |
| @skipUnlessPlatform(["linux"]) |
| def test_tls_no_sme(self): |
| if self.isAArch64SME(): |
| self.skipTest("SME must not be present.") |
| |
| self.check_tls_reg(["tpidr"]) |
| |
| @skipUnlessArch("aarch64") |
| @skipUnlessPlatform(["linux"]) |
| def test_tls_sme(self): |
| if not self.isAArch64SME(): |
| self.skipTest("SME must be present.") |
| |
| self.check_tls_reg(["tpidr", "tpidr2"]) |
| |
| @skipUnlessArch("aarch64") |
| @skipUnlessPlatform(["linux"]) |
| def test_tpidr2_no_sme(self): |
| if self.isAArch64SME(): |
| self.skipTest("SME must not be present.") |
| |
| self.setup("tpidr") |
| |
| regs = self.thread().GetSelectedFrame().GetRegisters() |
| tls_regs = regs.GetFirstValueByName("Thread Local Storage Registers") |
| self.assertTrue(tls_regs.IsValid(), "No TLS registers found.") |
| tls_reg = tls_regs.GetChildMemberWithName("tpidr2") |
| self.assertFalse(tls_reg.IsValid(), "tpdir2 should not be present without SME") |
