Fix Memory leak in addApbChangeCallback() (#3560)
* `ledcWriteTone()` added a `apbcallback()` evertime the tone value was non zero. * `addApbChangeCallback()` did not detect duplicate callbacks. * changed the apbcallback list to a double link to support roll forward, roll back execution. This made the sequences of clock change callback start with the newest registered -> to oldest on the `before` then oldest -> newest after the clock change. This made the UART debug log output have minimal gibberish during the clock change. * change how the UART callback handled the MUTEX because if any `apbchangeCallback()` executed a `log_x()` a deadlock would occur. This fixes #3555
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@ -28,6 +28,7 @@
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#include "esp32-hal-cpu.h"
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typedef struct apb_change_cb_s {
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struct apb_change_cb_s * prev;
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struct apb_change_cb_s * next;
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void * arg;
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apb_change_cb_t cb;
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@ -53,9 +54,19 @@ static void triggerApbChangeCallback(apb_change_ev_t ev_type, uint32_t old_apb,
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initApbChangeCallback();
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xSemaphoreTake(apb_change_lock, portMAX_DELAY);
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apb_change_t * r = apb_change_callbacks;
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while(r != NULL){
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r->cb(r->arg, ev_type, old_apb, new_apb);
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r=r->next;
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if( r != NULL ){
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if(ev_type == APB_BEFORE_CHANGE )
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while(r != NULL){
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r->cb(r->arg, ev_type, old_apb, new_apb);
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r=r->next;
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}
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else { // run backwards through chain
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while(r->next != NULL) r = r->next; // find first added
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while( r != NULL){
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r->cb(r->arg, ev_type, old_apb, new_apb);
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r=r->prev;
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}
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}
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}
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xSemaphoreGive(apb_change_lock);
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}
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@ -68,6 +79,7 @@ bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
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return false;
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}
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c->next = NULL;
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c->prev = NULL;
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c->arg = arg;
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c->cb = cb;
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xSemaphoreTake(apb_change_lock, portMAX_DELAY);
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@ -75,18 +87,20 @@ bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
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apb_change_callbacks = c;
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} else {
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apb_change_t * r = apb_change_callbacks;
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if(r->cb != cb || r->arg != arg){
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while(r->next){
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r = r->next;
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if(r->cb == cb && r->arg == arg){
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free(c);
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goto unlock_and_exit;
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}
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}
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r->next = c;
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// look for duplicate callbacks
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while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
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if (r) {
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log_e("duplicate func=%08X arg=%08X",c->cb,c->arg);
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free(c);
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xSemaphoreGive(apb_change_lock);
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return false;
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}
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else {
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c->next = apb_change_callbacks;
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apb_change_callbacks-> prev = c;
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apb_change_callbacks = c;
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}
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}
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unlock_and_exit:
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xSemaphoreGive(apb_change_lock);
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return true;
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}
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@ -95,24 +109,21 @@ bool removeApbChangeCallback(void * arg, apb_change_cb_t cb){
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initApbChangeCallback();
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xSemaphoreTake(apb_change_lock, portMAX_DELAY);
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apb_change_t * r = apb_change_callbacks;
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if(r == NULL){
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// look for matching callback
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while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
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if ( r == NULL ) {
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log_e("not found func=%08X arg=%08X",cb,arg);
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xSemaphoreGive(apb_change_lock);
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return false;
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}
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if(r->cb == cb && r->arg == arg){
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apb_change_callbacks = r->next;
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}
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else {
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// patch links
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if(r->prev) r->prev->next = r->next;
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else { // this is first link
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apb_change_callbacks = r->next;
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}
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if(r->next) r->next->prev = r->prev;
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free(r);
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} else {
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while(r->next && (r->next->cb != cb || r->next->arg != arg)){
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r = r->next;
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}
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if(r->next == NULL || r->next->cb != cb || r->next->arg != arg){
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xSemaphoreGive(apb_change_lock);
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return false;
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}
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apb_change_t * c = r->next;
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r->next = c->next;
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free(c);
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}
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xSemaphoreGive(apb_change_lock);
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return true;
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@ -186,7 +197,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
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//Update REF_TICK (uncomment if REF_TICK is different than 1MHz)
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//if(conf.freq_mhz < 80){
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// ESP_REG(APB_CTRL_XTAL_TICK_CONF_REG) = conf.freq_mhz / (REF_CLK_FREQ / MHZ) - 1;
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//}
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// }
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//Update APB Freq REG
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rtc_clk_apb_freq_update(apb);
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//Update esp_timer divisor
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@ -28,7 +28,7 @@
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#else
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#define LEDC_MUTEX_LOCK() do {} while (xSemaphoreTake(_ledc_sys_lock, portMAX_DELAY) != pdPASS)
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#define LEDC_MUTEX_UNLOCK() xSemaphoreGive(_ledc_sys_lock)
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xSemaphoreHandle _ledc_sys_lock;
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xSemaphoreHandle _ledc_sys_lock = NULL;
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#endif
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/*
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@ -55,27 +55,35 @@ xSemaphoreHandle _ledc_sys_lock;
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static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
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if(ev_type == APB_AFTER_CHANGE && old_apb != new_apb){
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uint32_t iarg = (uint32_t)arg;
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uint8_t chan = iarg;
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uint8_t group=(chan/8), timer=((chan/2)%4);
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uint16_t iarg = *(uint16_t*)arg;
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uint8_t chan = 0;
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old_apb /= 1000000;
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new_apb /= 1000000;
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if(LEDC_TIMER(group, timer).conf.tick_sel){
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LEDC_MUTEX_LOCK();
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uint32_t old_div = LEDC_TIMER(group, timer).conf.clock_divider;
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uint32_t div_num = (new_apb * old_div) / old_apb;
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if(div_num > LEDC_DIV_NUM_HSTIMER0_V){
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new_apb = REF_CLK_FREQ / 1000000;
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div_num = (new_apb * old_div) / old_apb;
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if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
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div_num = LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
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while(iarg){ // run though all active channels, adjusting timing configurations
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if(iarg & 1) {// this channel is active
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uint8_t group=(chan/8), timer=((chan/2)%4);
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if(LEDC_TIMER(group, timer).conf.tick_sel){
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LEDC_MUTEX_LOCK();
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uint32_t old_div = LEDC_TIMER(group, timer).conf.clock_divider;
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uint32_t div_num = (new_apb * old_div) / old_apb;
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if(div_num > LEDC_DIV_NUM_HSTIMER0_V){
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div_num = ((REF_CLK_FREQ /1000000) * old_div) / old_apb;
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if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
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div_num = LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
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}
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LEDC_TIMER(group, timer).conf.tick_sel = 0;
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} else if(div_num < 256) {
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div_num = 256;//highest clock possible
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}
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LEDC_TIMER(group, timer).conf.clock_divider = div_num;
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LEDC_MUTEX_UNLOCK();
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}
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else {
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log_d("using REF_CLK chan=%d",chan);
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}
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LEDC_TIMER(group, timer).conf.tick_sel = 0;
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} else if(div_num < 256) {
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div_num = 256;//highest clock possible
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}
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LEDC_TIMER(group, timer).conf.clock_divider = div_num;
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LEDC_MUTEX_UNLOCK();
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iarg = iarg >> 1;
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chan++;
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}
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}
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}
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@ -85,11 +93,14 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
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{
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uint8_t group=(chan/8), timer=((chan/2)%4);
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static bool tHasStarted = false;
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static uint16_t _activeChannels = 0;
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if(!tHasStarted) {
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tHasStarted = true;
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DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN);
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DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
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LEDC.conf.apb_clk_sel = 1;//LS use apb clock
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addApbChangeCallback((void*)&_activeChannels, _on_apb_change);
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#if !CONFIG_DISABLE_HAL_LOCKS
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_ledc_sys_lock = xSemaphoreCreateMutex();
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#endif
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@ -105,8 +116,7 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
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LEDC_TIMER(group, timer).conf.rst = 1;//This bit is used to reset timer the counter will be 0 after reset.
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LEDC_TIMER(group, timer).conf.rst = 0;
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LEDC_MUTEX_UNLOCK();
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uint32_t iarg = chan;
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addApbChangeCallback((void*)iarg, _on_apb_change);
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_activeChannels |= (1 << chan); // mark as active for APB callback
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}
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//max div_num 0x3FFFF (262143)
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@ -217,7 +217,6 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
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if(txPin != -1) {
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uartAttachTx(uart, txPin, inverted);
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}
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addApbChangeCallback(uart, uart_on_apb_change);
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return uart;
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}
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@ -377,18 +376,21 @@ static void uart_on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old
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uart->dev->int_clr.val = 0xffffffff;
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// read RX fifo
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uint8_t c;
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BaseType_t xHigherPriorityTaskWoken;
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// BaseType_t xHigherPriorityTaskWoken;
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while(uart->dev->status.rxfifo_cnt != 0 || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
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c = uart->dev->fifo.rw_byte;
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if(uart->queue != NULL && !xQueueIsQueueFullFromISR(uart->queue)) {
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xQueueSendFromISR(uart->queue, &c, &xHigherPriorityTaskWoken);
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if(uart->queue != NULL ) {
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xQueueSend(uart->queue, &c, 1); //&xHigherPriorityTaskWoken);
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}
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}
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UART_MUTEX_UNLOCK();
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// wait TX empty
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while(uart->dev->status.txfifo_cnt || uart->dev->status.st_utx_out);
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} else {
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//todo:
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// set baudrate
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UART_MUTEX_LOCK();
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uint32_t clk_div = (uart->dev->clk_div.div_int << 4) | (uart->dev->clk_div.div_frag & 0x0F);
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uint32_t baud_rate = ((old_apb<<4)/clk_div);
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clk_div = ((new_apb<<4)/baud_rate);
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