toolchain: C++ exception workarounds
* enable C++ exception crash workaround * disable C++ crash workaround Closes https://github.com/espressif/esp-idf/issues/5360 Closes IDF-1128 Closes IDF-1301 Closes IDF-1804
This commit is contained in:
Jakob Hasse
parent
23801b3517
commit
f4c2f680f7
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@ -44,16 +44,23 @@ TEST_CASE("can use std::vector", "[cxx]")
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TEST_ASSERT_EQUAL(51, std::accumulate(std::begin(v), std::end(v), 0));
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}
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/* Note: When first exception (in system) is thrown this test produces memory leaks report (~500 bytes):
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- 392 bytes (can vary) as libunwind allocates memory to keep stack frames info to handle exceptions.
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This info is kept until global destructors are called by __do_global_dtors_aux()
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/* Note: When first exception (in system) is thrown this test produces memory leaks report (~300 bytes):
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- 8 bytes are allocated by __cxa_get_globals() to keep __cxa_eh_globals
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- 16 bytes are allocated by pthread_setspecific() which is called by __cxa_get_globals() to init TLS var for __cxa_eh_globals
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- 88 bytes are allocated by pthread_setspecific() to init internal lock
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- some more memory...
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*/
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#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
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TEST_CASE("c++ exceptions work", "[cxx] [exceptions] [leaks=816]")
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#if CONFIG_IDF_TARGET_ESP32
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#define LEAKS "300"
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#elif CONFIG_IDF_TARGET_ESP32S2
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#define LEAKS "800"
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#else
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#error "unknown target in CXX tests, can't set leaks threshold"
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#endif
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TEST_CASE("c++ exceptions work", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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int thrown_value;
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try {
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@ -65,7 +72,7 @@ TEST_CASE("c++ exceptions work", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ bool exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ bool exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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bool thrown_value = false;
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try {
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@ -77,7 +84,7 @@ TEST_CASE("c++ bool exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ void exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ void exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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void* thrown_value = 0;
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try {
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@ -89,7 +96,7 @@ TEST_CASE("c++ void exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ uint64_t exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ uint64_t exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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uint64_t thrown_value = 0;
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try {
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@ -101,7 +108,7 @@ TEST_CASE("c++ uint64_t exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ char exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ char exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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char thrown_value = '0';
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try {
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@ -113,7 +120,7 @@ TEST_CASE("c++ char exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ wchar exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ wchar exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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wchar_t thrown_value = 0;
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try {
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@ -125,7 +132,7 @@ TEST_CASE("c++ wchar exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ float exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ float exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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float thrown_value = 0;
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try {
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@ -137,7 +144,7 @@ TEST_CASE("c++ float exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ double exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ double exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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double thrown_value = 0;
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try {
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@ -149,7 +156,7 @@ TEST_CASE("c++ double exception", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ const char* exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ const char* exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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const char *thrown_value = 0;
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try {
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@ -167,7 +174,7 @@ public:
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NonExcTypeThrowee(int value) : value(value) { }
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};
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TEST_CASE("c++ any class exception", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ any class exception", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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int thrown_value = 0;
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try {
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@ -185,7 +192,7 @@ public:
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ExcTypeThrowee(int value) : value(value) { }
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};
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TEST_CASE("c++ std::exception child", "[cxx] [exceptions] [leaks=816]")
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TEST_CASE("c++ std::exception child", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{
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int thrown_value = 0;
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try {
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@ -197,7 +204,7 @@ TEST_CASE("c++ std::exception child", "[cxx] [exceptions] [leaks=816]")
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printf("OK?\n");
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}
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TEST_CASE("c++ exceptions emergency pool", "[cxx] [exceptions] [ignore]")
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TEST_CASE("c++ exceptions emergency pool", "[cxx] [exceptions] [ignore] [leaks=" LEAKS "]")
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{
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void **p, **pprev = NULL;
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int thrown_value = 0;
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@ -244,6 +251,60 @@ TEST_CASE("c++ exceptions emergency pool", "[cxx] [exceptions] [ignore]")
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#endif
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}
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#define TIMEOUT 19
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#define RECURSION 19
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static esp_timer_handle_t crash_timer;
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static uint32_t result = 0;
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uint32_t calc_fac(uint32_t n) {
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if (n == 1 || n == 0) {
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return 1;
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} else {
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return n * calc_fac(n - 1);
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}
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}
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static void timer_cb(void *arg) {
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result = calc_fac(RECURSION);
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}
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// TODO: Not a unit test, refactor to integration test/system test, etc.
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TEST_CASE("frequent interrupts don't interfere with c++ exceptions", "[cxx] [exceptions] [leaks=" LEAKS "]")
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{// if exception workaround is disabled, this is almost guaranteed to fail
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const esp_timer_create_args_t timer_args {
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timer_cb,
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NULL,
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ESP_TIMER_TASK,
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"crash_timer"
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};
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TEST_ESP_OK(esp_timer_create(&timer_args, &crash_timer));
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TEST_ESP_OK(esp_timer_start_periodic(crash_timer, TIMEOUT));
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for (int i = 0; i < 500; i++) {
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bool thrown_value = false;
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try {
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throw true;
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} catch (bool e) {
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thrown_value = e;
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}
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if (thrown_value) {
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printf("ex thrown %d\n", i);
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} else {
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printf("ex not thrown\n");
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TEST_ASSERT(false);
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}
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}
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TEST_ESP_OK(esp_timer_stop(crash_timer));
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TEST_ESP_OK(esp_timer_delete(crash_timer));
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}
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#else // !CONFIG_COMPILER_CXX_EXCEPTIONS
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TEST_CASE("std::out_of_range exception when -fno-exceptions", "[cxx][reset=abort,SW_CPU_RESET]")
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@ -102,6 +102,13 @@ static volatile bool s_system_full_inited = false;
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sys_startup_fn_t g_startup_fn[1] = { start_cpu0 };
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#endif
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#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
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// workaround for C++ exception crashes
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void _Unwind_SetNoFunctionContextInstall(unsigned char enable);
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// workaround for C++ exception large memory allocation
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void _Unwind_SetEnableExceptionFdeSorting(unsigned char enable);
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#endif // CONFIG_COMPILER_CXX_EXCEPTIONS
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static const char* TAG = "cpu_start";
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static void IRAM_ATTR do_global_ctors(void)
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@ -116,7 +123,7 @@ static void IRAM_ATTR do_global_ctors(void)
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static struct object ob;
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__register_frame_info( __eh_frame, &ob );
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#endif
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#endif // CONFIG_COMPILER_CXX_EXCEPTIONS
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void (**p)(void);
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for (p = &__init_array_end - 1; p >= &__init_array_start; --p) {
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@ -375,4 +382,11 @@ IRAM_ATTR ESP_SYSTEM_INIT_FN(init_components0, BIT(0))
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esp_efuse_init(efuse_partition->address, efuse_partition->size);
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}
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#endif
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}
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#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
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ESP_EARLY_LOGD(TAG, "Setting C++ exception workarounds.");
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_Unwind_SetNoFunctionContextInstall(1);
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_Unwind_SetEnableExceptionFdeSorting(0);
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#endif // CONFIG_COMPILER_CXX_EXCEPTIONS
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}
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