| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <inttypes.h> |
| #include <link.h> |
| #include <stdatomic.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <launchpad/launchpad.h> |
| #include <launchpad/vmo.h> |
| #include <zircon/crashlogger.h> |
| #include <zircon/process.h> |
| #include <zircon/processargs.h> |
| #include <zircon/syscalls.h> |
| #include <zircon/syscalls/debug.h> |
| #include <zircon/syscalls/exception.h> |
| #include <zircon/syscalls/object.h> |
| #include <zircon/syscalls/port.h> |
| #include <test-utils/test-utils.h> |
| #include <unittest/unittest.h> |
| |
| #include "utils.h" |
| |
| typedef bool (wait_inferior_exception_handler_t)(zx_handle_t inferior, |
| const zx_port_packet_t* packet, |
| void* handler_arg); |
| |
| // Sleep interval in the watchdog thread. Make this short so we don't need to |
| // wait too long when tearing down in the success case. This is especially |
| // helpful when running "while /boot/test/debugger-test; do true; done". |
| #define WATCHDOG_DURATION_TICK ((int64_t)ZX_MSEC(30)) // 0.03 seconds |
| |
| // Number of sleep intervals until the watchdog fires. |
| #define WATCHDOG_DURATION_TICKS 100 // 3 seconds |
| |
| #define TEST_MEMORY_SIZE 8 |
| #define TEST_DATA_ADJUST 0x10 |
| |
| // Do the segv recovery test a number of times to stress test the API. |
| #define NUM_SEGV_TRIES 4 |
| |
| #define NUM_EXTRA_THREADS 4 |
| |
| // Produce a backtrace of sufficient size to be interesting but not excessive. |
| #define TEST_SEGFAULT_DEPTH 4 |
| |
| static const char test_inferior_child_name[] = "inferior"; |
| // The segfault child is not used by the test. |
| // It exists for debugging purposes. |
| static const char test_segfault_child_name[] = "segfault"; |
| // Used for testing the s/w breakpoint insn. |
| static const char test_swbreak_child_name[] = "swbreak"; |
| |
| // Setting to true when done turns off the watchdog timer. This |
| // must be an atomic so that the compiler does not assume anything |
| // about when it can be touched. Otherwise, since the compiler |
| // knows that vDSO calls don't make direct callbacks, it assumes |
| // that nothing can happen inside the watchdog loop that would touch |
| // this variable. In fact, it will be touched in parallel by |
| // another thread. |
| static volatile atomic_bool done_tests; |
| |
| static atomic_int extra_thread_count = ATOMIC_VAR_INIT(0); |
| |
| static void test_memory_ops(zx_handle_t inferior, zx_handle_t thread) |
| { |
| uint64_t test_data_addr = 0; |
| uint8_t test_data[TEST_MEMORY_SIZE]; |
| |
| #ifdef __x86_64__ |
| test_data_addr = get_uint64_register(thread, offsetof(zx_x86_64_general_regs_t, r9)); |
| #endif |
| #ifdef __aarch64__ |
| test_data_addr = get_uint64_register(thread, offsetof(zx_arm64_general_regs_t, r[9])); |
| #endif |
| |
| size_t size = read_inferior_memory(inferior, test_data_addr, test_data, sizeof(test_data)); |
| EXPECT_EQ(size, sizeof(test_data), "read_inferior_memory: short read"); |
| |
| for (unsigned i = 0; i < sizeof(test_data); ++i) { |
| EXPECT_EQ(test_data[i], i, "test_memory_ops"); |
| } |
| |
| for (unsigned i = 0; i < sizeof(test_data); ++i) |
| test_data[i] += TEST_DATA_ADJUST; |
| |
| size = write_inferior_memory(inferior, test_data_addr, test_data, sizeof(test_data)); |
| EXPECT_EQ(size, sizeof(test_data), "write_inferior_memory: short write"); |
| |
| // Note: Verification of the write is done in the inferior. |
| } |
| |
| static void fix_inferior_segv(zx_handle_t thread) |
| { |
| unittest_printf("Fixing inferior segv\n"); |
| |
| #ifdef __x86_64__ |
| // The segv was because r8 == 0, change it to a usable value. |
| // See test_prep_and_segv. |
| uint64_t rsp = get_uint64_register(thread, offsetof(zx_x86_64_general_regs_t, rsp)); |
| set_uint64_register(thread, offsetof(zx_x86_64_general_regs_t, r8), rsp); |
| #endif |
| |
| #ifdef __aarch64__ |
| // The segv was because r8 == 0, change it to a usable value. |
| // See test_prep_and_segv. |
| uint64_t sp = get_uint64_register(thread, offsetof(zx_arm64_general_regs_t, sp)); |
| set_uint64_register(thread, offsetof(zx_arm64_general_regs_t, r[8]), sp); |
| #endif |
| } |
| |
| static bool test_segv_pc(zx_handle_t thread) |
| { |
| #ifdef __x86_64__ |
| uint64_t pc = get_uint64_register( |
| thread, offsetof(zx_x86_64_general_regs_t, rip)); |
| uint64_t r10 = get_uint64_register( |
| thread, offsetof(zx_x86_64_general_regs_t, r10)); |
| ASSERT_EQ(pc, r10, "fault PC does not match r10"); |
| #endif |
| |
| #ifdef __aarch64__ |
| uint64_t pc = get_uint64_register( |
| thread, offsetof(zx_arm64_general_regs_t, pc)); |
| uint64_t x10 = get_uint64_register( |
| thread, offsetof(zx_arm64_general_regs_t, r[10])); |
| ASSERT_EQ(pc, x10, "fault PC does not match x10"); |
| #endif |
| |
| return true; |
| } |
| |
| // A simpler exception handler. |
| // All exceptions are passed on to |handler|. |
| // Returns false if a test fails. |
| // Otherwise waits for the inferior to exit and returns true. |
| |
| static bool wait_inferior_thread_worker(zx_handle_t inferior, |
| zx_handle_t eport, |
| wait_inferior_exception_handler_t* handler, |
| void* handler_arg) |
| { |
| while (true) { |
| zx_port_packet_t packet; |
| if (!read_exception(eport, inferior, &packet)) |
| return false; |
| |
| // Is the inferior gone? |
| if (packet.type == ZX_EXCP_GONE && packet.exception.tid == 0) { |
| unittest_printf("wait-inf: inferior gone\n"); |
| return true; |
| } |
| |
| if (!handler(inferior, &packet, handler_arg)) |
| return false; |
| } |
| } |
| |
| typedef struct { |
| zx_handle_t inferior; |
| zx_handle_t eport; |
| wait_inferior_exception_handler_t* handler; |
| void* handler_arg; |
| } wait_inf_args_t; |
| |
| static int wait_inferior_thread_func(void* arg) |
| { |
| wait_inf_args_t* args = arg; |
| zx_handle_t inferior = args->inferior; |
| zx_handle_t eport = args->eport; |
| wait_inferior_exception_handler_t* handler = args->handler; |
| void* handler_arg = args->handler_arg; |
| free(args); |
| |
| bool pass = wait_inferior_thread_worker(inferior, eport, handler, handler_arg); |
| return pass ? 0 : -1; |
| } |
| |
| static int watchdog_thread_func(void* arg) |
| { |
| for (int i = 0; i < WATCHDOG_DURATION_TICKS; ++i) { |
| zx_nanosleep(zx_deadline_after(WATCHDOG_DURATION_TICK)); |
| if (atomic_load(&done_tests)) |
| return 0; |
| } |
| unittest_printf_critical("\n\n*** WATCHDOG TIMER FIRED ***\n"); |
| // This kills the entire process, not just this thread. |
| // TODO(dbort): Figure out why the shell sometimes reports a zero |
| // exit status when we expect to see '5'. |
| exit(5); |
| } |
| |
| static thrd_t start_wait_inf_thread(zx_handle_t inferior, |
| zx_handle_t* out_eport, |
| wait_inferior_exception_handler_t* handler, |
| void* handler_arg) |
| { |
| zx_handle_t eport = attach_inferior(inferior); |
| wait_inf_args_t* args = calloc(1, sizeof(*args)); |
| |
| // Both handles are loaned to the thread. The caller of this function |
| // owns and must close them. |
| args->inferior = inferior; |
| args->eport = eport; |
| args->handler = handler; |
| args->handler_arg = handler_arg; |
| |
| thrd_t wait_inferior_thread; |
| tu_thread_create_c11(&wait_inferior_thread, wait_inferior_thread_func, |
| (void*)args, "wait-inf thread"); |
| *out_eport = eport; |
| return wait_inferior_thread; |
| } |
| |
| static void join_wait_inf_thread(thrd_t wait_inf_thread) |
| { |
| unittest_printf("Waiting for wait-inf thread\n"); |
| int thread_rc; |
| int ret = thrd_join(wait_inf_thread, &thread_rc); |
| EXPECT_EQ(ret, thrd_success, "thrd_join failed"); |
| EXPECT_EQ(thread_rc, 0, "unexpected wait-inf return"); |
| unittest_printf("wait-inf thread done\n"); |
| } |
| |
| static bool expect_debugger_attached_eq( |
| zx_handle_t inferior, bool expected, const char* msg) |
| { |
| zx_info_process_t info; |
| // ZX_ASSERT returns false if the check fails. |
| ASSERT_EQ(zx_object_get_info( |
| inferior, ZX_INFO_PROCESS, &info, sizeof(info), NULL, NULL), ZX_OK, ""); |
| ASSERT_EQ(info.debugger_attached, expected, msg); |
| return true; |
| } |
| |
| // This returns a bool as it's a unittest "helper" routine. |
| // N.B. This runs on the wait-inferior thread. |
| |
| static bool handle_thread_exiting(zx_handle_t inferior, |
| const zx_port_packet_t* packet) |
| { |
| BEGIN_HELPER; |
| |
| zx_koid_t tid = packet->exception.tid; |
| zx_handle_t thread; |
| zx_status_t status = zx_object_get_child(inferior, tid, ZX_RIGHT_SAME_RIGHTS, &thread); |
| // If the process has exited then the kernel may have reaped the |
| // thread already. Check. |
| if (status != ZX_ERR_NOT_FOUND) { |
| zx_info_thread_t info = tu_thread_get_info(thread); |
| // The thread could still transition to DEAD here (if the |
| // process exits), so check for either DYING or DEAD. |
| EXPECT_TRUE(info.state == ZX_THREAD_STATE_DYING || |
| info.state == ZX_THREAD_STATE_DEAD, ""); |
| // If the state is DYING it would be nice to check that the |
| // value of |info.wait_exception_port_type| is DEBUGGER. Alas |
| // if the process has exited then the thread will get |
| // THREAD_SIGNAL_KILL which will cause |
| // UserThread::ExceptionHandlerExchange to exit before we've |
| // told the thread to "resume" from ZX_EXCP_THREAD_EXITING. |
| // The thread is still in the DYING state but it is no longer |
| // in an exception. Thus |info.wait_exception_port_type| can |
| // either be DEBUGGER or NONE. |
| EXPECT_TRUE(info.wait_exception_port_type == ZX_EXCEPTION_PORT_TYPE_NONE || |
| info.wait_exception_port_type == ZX_EXCEPTION_PORT_TYPE_DEBUGGER, ""); |
| tu_handle_close(thread); |
| } else { |
| EXPECT_TRUE(tu_process_has_exited(inferior), ""); |
| } |
| unittest_printf("wait-inf: thread %" PRId64 " exited\n", tid); |
| // A thread is gone, but we only care about the process. |
| if (!resume_inferior(inferior, tid)) |
| return false; |
| |
| END_HELPER; |
| } |
| |
| // This returns a bool as it's a unittest "helper" routine. |
| // N.B. This runs on the wait-inferior thread. |
| |
| static bool handle_expected_page_fault(zx_handle_t inferior, |
| const zx_port_packet_t* packet, |
| atomic_int* segv_count) |
| { |
| BEGIN_HELPER; |
| |
| unittest_printf("wait-inf: got page fault exception\n"); |
| |
| zx_koid_t tid = packet->exception.tid; |
| zx_handle_t thread = tu_get_thread(inferior, tid); |
| |
| dump_inferior_regs(thread); |
| |
| // Verify that the fault is at the PC we expected. |
| if (!test_segv_pc(thread)) |
| return false; |
| |
| // Do some tests that require a suspended inferior. |
| test_memory_ops(inferior, thread); |
| |
| fix_inferior_segv(thread); |
| // Useful for debugging, otherwise a bit too verbose. |
| //dump_inferior_regs(thread); |
| |
| // Increment this before resuming the inferior in case the inferior |
| // sends MSG_RECOVERED_FROM_CRASH and the testcase processes the message |
| // before we can increment it. |
| atomic_fetch_add(segv_count, 1); |
| |
| zx_status_t status = zx_task_resume(thread, ZX_RESUME_EXCEPTION); |
| tu_handle_close(thread); |
| ASSERT_EQ(status, ZX_OK, ""); |
| |
| END_HELPER; |
| } |
| |
| // N.B. This runs on the wait-inferior thread. |
| |
| static bool debugger_test_exception_handler(zx_handle_t inferior, |
| const zx_port_packet_t* packet, |
| void* handler_arg) |
| { |
| BEGIN_HELPER; |
| |
| // Note: This may be NULL if the test is not expecting a page fault. |
| atomic_int* segv_count = handler_arg; |
| |
| zx_koid_t tid = packet->exception.tid; |
| |
| switch (packet->type) { |
| case ZX_EXCP_THREAD_STARTING: |
| unittest_printf("wait-inf: inferior started\n"); |
| if (!resume_inferior(inferior, tid)) |
| return false; |
| break; |
| |
| case ZX_EXCP_THREAD_EXITING: |
| EXPECT_TRUE(handle_thread_exiting(inferior, packet), ""); |
| break; |
| |
| case ZX_EXCP_GONE: |
| // A thread is gone, but we only care about the process which is |
| // handled by the caller. |
| break; |
| |
| case ZX_EXCP_FATAL_PAGE_FAULT: |
| ASSERT_NONNULL(segv_count, ""); |
| ASSERT_TRUE(handle_expected_page_fault(inferior, packet, segv_count), ""); |
| break; |
| |
| default: { |
| char msg[128]; |
| snprintf(msg, sizeof(msg), "unexpected packet type: 0x%x", |
| packet->type); |
| ASSERT_TRUE(false, msg); |
| __UNREACHABLE; |
| } |
| } |
| |
| END_HELPER; |
| } |
| |
| static bool debugger_test(void) |
| { |
| BEGIN_TEST; |
| |
| launchpad_t* lp; |
| zx_handle_t inferior, channel; |
| if (!setup_inferior(test_inferior_child_name, &lp, &inferior, &channel)) |
| return false; |
| |
| atomic_int segv_count; |
| |
| expect_debugger_attached_eq(inferior, false, "debugger should not appear attached"); |
| zx_handle_t eport = ZX_HANDLE_INVALID; |
| thrd_t wait_inf_thread = |
| start_wait_inf_thread(inferior, &eport, |
| debugger_test_exception_handler, &segv_count); |
| EXPECT_NE(eport, ZX_HANDLE_INVALID, ""); |
| expect_debugger_attached_eq(inferior, true, "debugger should appear attached"); |
| |
| if (!start_inferior(lp)) |
| return false; |
| if (!verify_inferior_running(channel)) |
| return false; |
| |
| atomic_store(&segv_count, 0); |
| enum message msg; |
| send_msg(channel, MSG_CRASH_AND_RECOVER_TEST); |
| if (!recv_msg(channel, &msg)) |
| return false; |
| EXPECT_EQ(msg, MSG_RECOVERED_FROM_CRASH, "unexpected response from crash"); |
| EXPECT_EQ(atomic_load(&segv_count), NUM_SEGV_TRIES, "segv tests terminated prematurely"); |
| |
| if (!shutdown_inferior(channel, inferior)) |
| return false; |
| |
| // Stop the waiter thread before closing the eport that it's waiting on. |
| join_wait_inf_thread(wait_inf_thread); |
| |
| expect_debugger_attached_eq(inferior, true, "debugger should still appear attached"); |
| tu_handle_close(eport); |
| expect_debugger_attached_eq(inferior, false, "debugger should no longer appear attached"); |
| |
| tu_handle_close(channel); |
| tu_handle_close(inferior); |
| |
| END_TEST; |
| } |
| |
| static bool debugger_thread_list_test(void) |
| { |
| BEGIN_TEST; |
| |
| launchpad_t* lp; |
| zx_handle_t inferior, channel; |
| if (!setup_inferior(test_inferior_child_name, &lp, &inferior, &channel)) |
| return false; |
| |
| zx_handle_t eport = ZX_HANDLE_INVALID; |
| thrd_t wait_inf_thread = |
| start_wait_inf_thread(inferior, &eport, |
| debugger_test_exception_handler, NULL); |
| EXPECT_NE(eport, ZX_HANDLE_INVALID, ""); |
| |
| if (!start_inferior(lp)) |
| return false; |
| if (!verify_inferior_running(channel)) |
| return false; |
| |
| enum message msg; |
| send_msg(channel, MSG_START_EXTRA_THREADS); |
| if (!recv_msg(channel, &msg)) |
| return false; |
| EXPECT_EQ(msg, MSG_EXTRA_THREADS_STARTED, "unexpected response when starting extra threads"); |
| |
| uint32_t buf_size = 100 * sizeof(zx_koid_t); |
| size_t num_threads; |
| zx_koid_t* threads = tu_malloc(buf_size); |
| zx_status_t status = zx_object_get_info(inferior, ZX_INFO_PROCESS_THREADS, |
| threads, buf_size, &num_threads, NULL); |
| ASSERT_EQ(status, ZX_OK, ""); |
| |
| // There should be at least 1+NUM_EXTRA_THREADS threads in the result. |
| ASSERT_GE(num_threads, (unsigned)(1 + NUM_EXTRA_THREADS), "zx_object_get_info failed"); |
| |
| // Verify each entry is valid. |
| for (uint32_t i = 0; i < num_threads; ++i) { |
| zx_koid_t koid = threads[i]; |
| unittest_printf("Looking up thread %llu\n", (long long) koid); |
| zx_handle_t thread = tu_get_thread(inferior, koid); |
| zx_info_handle_basic_t info; |
| status = zx_object_get_info(thread, ZX_INFO_HANDLE_BASIC, &info, sizeof(info), NULL, NULL); |
| EXPECT_EQ(status, ZX_OK, "zx_object_get_info failed"); |
| EXPECT_EQ(info.type, (uint32_t) ZX_OBJ_TYPE_THREAD, "not a thread"); |
| } |
| |
| if (!shutdown_inferior(channel, inferior)) |
| return false; |
| |
| // Stop the waiter thread before closing the eport that it's waiting on. |
| join_wait_inf_thread(wait_inf_thread); |
| |
| tu_handle_close(eport); |
| tu_handle_close(channel); |
| tu_handle_close(inferior); |
| |
| END_TEST; |
| } |
| |
| static bool property_process_debug_addr_test(void) |
| { |
| BEGIN_TEST; |
| |
| zx_handle_t self = zx_process_self(); |
| |
| // We shouldn't be able to set it. |
| uintptr_t debug_addr = 42; |
| zx_status_t status = zx_object_set_property(self, ZX_PROP_PROCESS_DEBUG_ADDR, |
| &debug_addr, sizeof(debug_addr)); |
| ASSERT_EQ(status, ZX_ERR_ACCESS_DENIED, ""); |
| |
| // Some minimal verification that the value is correct. |
| |
| status = zx_object_get_property(self, ZX_PROP_PROCESS_DEBUG_ADDR, |
| &debug_addr, sizeof(debug_addr)); |
| ASSERT_EQ(status, ZX_OK, ""); |
| |
| // These are all dsos we link with. See rules.mk. |
| const char* launchpad_so = "liblaunchpad.so"; |
| bool found_launchpad = false; |
| const char* libc_so = "libc.so"; |
| bool found_libc = false; |
| const char* test_utils_so = "libtest-utils.so"; |
| bool found_test_utils = false; |
| const char* unittest_so = "libunittest.so"; |
| bool found_unittest = false; |
| |
| const struct r_debug* r_debug = (struct r_debug*) debug_addr; |
| const struct link_map* lmap = r_debug->r_map; |
| |
| EXPECT_EQ((int) r_debug->r_state, RT_CONSISTENT, ""); |
| |
| while (lmap != NULL) { |
| if (strcmp(lmap->l_name, launchpad_so) == 0) |
| found_launchpad = true; |
| else if (strcmp(lmap->l_name, libc_so) == 0) |
| found_libc = true; |
| else if (strcmp(lmap->l_name, test_utils_so) == 0) |
| found_test_utils = true; |
| else if (strcmp(lmap->l_name, unittest_so) == 0) |
| found_unittest = true; |
| lmap = lmap->l_next; |
| } |
| |
| EXPECT_TRUE(found_launchpad, ""); |
| EXPECT_TRUE(found_libc, ""); |
| EXPECT_TRUE(found_test_utils, ""); |
| EXPECT_TRUE(found_unittest, ""); |
| |
| END_TEST; |
| } |
| |
| static int write_text_segment_helper(void) __ALIGNED(8); |
| static int write_text_segment_helper(void) |
| { |
| /* This function needs to be at least two bytes in size as we set a |
| breakpoint, figuratively speaking, on write_text_segment_helper + 1 |
| to ensure the address is not page aligned. Returning some random value |
| will ensure that. */ |
| return 42; |
| } |
| |
| static bool write_text_segment(void) |
| { |
| BEGIN_TEST; |
| |
| zx_handle_t self = zx_process_self(); |
| |
| // Exercise MG-739 |
| // Pretend we're writing a s/w breakpoint to the start of this function. |
| |
| // write_text_segment_helper is suitably aligned, add 1 to ensure the |
| // byte we write is not page aligned. |
| uintptr_t addr = (uintptr_t) write_text_segment_helper + 1; |
| uint8_t previous_byte; |
| size_t size = read_inferior_memory(self, addr, &previous_byte, sizeof(previous_byte)); |
| EXPECT_EQ(size, sizeof(previous_byte), ""); |
| |
| uint8_t byte_to_write = 0; |
| size = write_inferior_memory(self, addr, &byte_to_write, sizeof(byte_to_write)); |
| EXPECT_EQ(size, sizeof(byte_to_write), ""); |
| |
| size = write_inferior_memory(self, addr, &previous_byte, sizeof(previous_byte)); |
| EXPECT_EQ(size, sizeof(previous_byte), ""); |
| |
| END_TEST; |
| } |
| |
| // This function is marked as no-inline to avoid duplicate label in case the |
| // function call is being inlined. |
| __NO_INLINE static bool test_prep_and_segv(void) |
| { |
| uint8_t test_data[TEST_MEMORY_SIZE]; |
| for (unsigned i = 0; i < sizeof(test_data); ++i) |
| test_data[i] = i; |
| |
| #ifdef __x86_64__ |
| void* segv_pc; |
| // Note: Fuchsia is always PIC. |
| __asm__("leaq .Lsegv_here(%%rip),%0" : "=r" (segv_pc)); |
| unittest_printf("About to segv, pc %p\n", segv_pc); |
| |
| // Set r9 to point to test_data so we can easily access it |
| // from the parent process. Likewise set r10 to segv_pc |
| // so the parent process can verify it matches the fault PC. |
| __asm__("\ |
| movq %[zero],%%r8\n\ |
| movq %[test_data],%%r9\n\ |
| movq %[pc],%%r10\n\ |
| .Lsegv_here:\n\ |
| movq (%%r8),%%rax\ |
| " : : |
| [zero] "g" (0), |
| [test_data] "g" (&test_data[0]), |
| [pc] "g" (segv_pc) : |
| "rax", "r8", "r9", "r10"); |
| #endif |
| |
| #ifdef __aarch64__ |
| void* segv_pc; |
| // Note: Fuchsia is always PIC. |
| __asm__("adrp %0, .Lsegv_here\n" |
| "add %0, %0, :lo12:.Lsegv_here" : "=r" (segv_pc)); |
| unittest_printf("About to segv, pc %p\n", segv_pc); |
| |
| // Set r9 to point to test_data so we can easily access it |
| // from the parent process. Likewise set r10 to segv_pc |
| // so the parent process can verify it matches the fault PC. |
| __asm__("\ |
| mov x8,xzr\n\ |
| mov x9,%[test_data]\n\ |
| mov x10,%[pc]\n\ |
| .Lsegv_here:\n\ |
| ldr x0,[x8]\ |
| " : : |
| [test_data] "r" (&test_data[0]), |
| [pc] "r" (segv_pc) : |
| "x0", "x8", "x9", "x10"); |
| #endif |
| |
| // On resumption test_data should have had TEST_DATA_ADJUST added to each element. |
| // Note: This is the inferior process, it's not running under the test harness. |
| for (unsigned i = 0; i < sizeof(test_data); ++i) { |
| if (test_data[i] != i + TEST_DATA_ADJUST) { |
| unittest_printf("test_prep_and_segv: bad data on resumption, test_data[%u] = 0x%x\n", |
| i, test_data[i]); |
| return false; |
| } |
| } |
| |
| unittest_printf("Inferior successfully resumed!\n"); |
| |
| return true; |
| } |
| |
| static int extra_thread_func(void* arg) |
| { |
| atomic_fetch_add(&extra_thread_count, 1); |
| unittest_printf("Extra thread started.\n"); |
| while (true) |
| zx_nanosleep(zx_deadline_after(ZX_SEC(1))); |
| return 0; |
| } |
| |
| // This returns a bool as it's a unittest "helper" routine. |
| |
| static bool msg_loop(zx_handle_t channel) |
| { |
| BEGIN_HELPER; // Don't stomp on the main thread's current_test_info. |
| |
| bool my_done_tests = false; |
| |
| while (!atomic_load(&done_tests) && !my_done_tests) |
| { |
| enum message msg; |
| ASSERT_TRUE(recv_msg(channel, &msg), "Error while receiving msg"); |
| switch (msg) |
| { |
| case MSG_DONE: |
| my_done_tests = true; |
| break; |
| case MSG_PING: |
| send_msg(channel, MSG_PONG); |
| break; |
| case MSG_CRASH_AND_RECOVER_TEST: |
| for (int i = 0; i < NUM_SEGV_TRIES; ++i) { |
| if (!test_prep_and_segv()) |
| exit(21); |
| } |
| send_msg(channel, MSG_RECOVERED_FROM_CRASH); |
| break; |
| case MSG_START_EXTRA_THREADS: |
| for (int i = 0; i < NUM_EXTRA_THREADS; ++i) { |
| // For our purposes, we don't need to track the threads. |
| // They'll be terminated when the process exits. |
| thrd_t thread; |
| tu_thread_create_c11(&thread, extra_thread_func, NULL, "extra-thread"); |
| } |
| // Wait for all threads to be started. |
| // Each will require an ZX_EXCP_STARTING exchange with the "debugger". |
| while (atomic_load(&extra_thread_count) < NUM_EXTRA_THREADS) |
| zx_nanosleep(zx_deadline_after(ZX_USEC(1))); |
| send_msg(channel, MSG_EXTRA_THREADS_STARTED); |
| break; |
| default: |
| unittest_printf("unknown message received: %d\n", msg); |
| break; |
| } |
| } |
| |
| END_HELPER; |
| } |
| |
| void test_inferior(void) |
| { |
| zx_handle_t channel = zx_get_startup_handle(PA_USER0); |
| unittest_printf("test_inferior: got handle %d\n", channel); |
| |
| if (!msg_loop(channel)) |
| exit(20); |
| |
| atomic_store(&done_tests, true); |
| unittest_printf("Inferior done\n"); |
| exit(1234); |
| } |
| |
| // Compilers are getting too smart. |
| // These maintain the semantics we want even under optimization. |
| |
| volatile int* crashing_ptr = (int*) 42; |
| volatile int crash_depth; |
| |
| // This is used to cause fp != sp when the crash happens on arm64. |
| int leaf_stack_size = 10; |
| |
| static int __NO_INLINE test_segfault_doit2(int*); |
| |
| static int __NO_INLINE test_segfault_leaf(int n, int* p) |
| { |
| volatile int x[n]; |
| x[0] = *p; |
| *crashing_ptr = x[0]; |
| return 0; |
| } |
| |
| static int __NO_INLINE test_segfault_doit1(int* p) |
| { |
| if (crash_depth > 0) |
| { |
| int n = crash_depth; |
| int use_stack[n]; |
| memset(use_stack, 0x99, n * sizeof(int)); |
| --crash_depth; |
| return test_segfault_doit2(use_stack) + 99; |
| } |
| return test_segfault_leaf(leaf_stack_size, p) + 99; |
| } |
| |
| static int __NO_INLINE test_segfault_doit2(int* p) |
| { |
| return test_segfault_doit1(p) + *p; |
| } |
| |
| // Produce a crash with a moderately interesting backtrace. |
| |
| static int __NO_INLINE test_segfault(void) |
| { |
| crash_depth = TEST_SEGFAULT_DEPTH; |
| int i = 0; |
| return test_segfault_doit1(&i); |
| } |
| |
| // Invoke the s/w breakpoint insn using the crashlogger mechanism |
| // to request a backtrace but not terminate the process. |
| |
| static int __NO_INLINE test_swbreak(void) |
| { |
| unittest_printf("Invoking s/w breakpoint instruction\n"); |
| crashlogger_request_backtrace(); |
| unittest_printf("Resumed after s/w breakpoint instruction\n"); |
| return 0; |
| } |
| |
| BEGIN_TEST_CASE(debugger_tests) |
| RUN_TEST(debugger_test) |
| RUN_TEST(debugger_thread_list_test) |
| RUN_TEST(property_process_debug_addr_test) |
| RUN_TEST(write_text_segment) |
| END_TEST_CASE(debugger_tests) |
| |
| static void check_verbosity(int argc, char** argv) |
| { |
| for (int i = 1; i < argc; ++i) { |
| if (strncmp(argv[i], "v=", 2) == 0) { |
| int verbosity = atoi(argv[i] + 2); |
| unittest_set_verbosity_level(verbosity); |
| break; |
| } |
| } |
| } |
| |
| int main(int argc, char **argv) |
| { |
| program_path = argv[0]; |
| |
| if (argc >= 2 && strcmp(argv[1], test_inferior_child_name) == 0) { |
| check_verbosity(argc, argv); |
| test_inferior(); |
| return 0; |
| } |
| if (argc >= 2 && strcmp(argv[1], test_segfault_child_name) == 0) { |
| check_verbosity(argc, argv); |
| return test_segfault(); |
| } |
| if (argc >= 2 && strcmp(argv[1], test_swbreak_child_name) == 0) { |
| check_verbosity(argc, argv); |
| return test_swbreak(); |
| } |
| |
| thrd_t watchdog_thread; |
| tu_thread_create_c11(&watchdog_thread, watchdog_thread_func, NULL, "watchdog-thread"); |
| |
| bool success = unittest_run_all_tests(argc, argv); |
| |
| atomic_store(&done_tests, true); |
| thrd_join(watchdog_thread, NULL); |
| return success ? 0 : -1; |
| } |
