micros() is not IRAM_ATTR safe in staging

[brainsucker-na]

Hardware:

Board: ESP-WROOM32
Updating espressif32 @ a45da6a [Up-to-date]
Updating framework-arduinoespressif32 @ dd639c4 [Up-to-date]
IDE name: Platform.io

Description:

micros() is not IRAM_ATTR safe in current staging version.
Just get a frequent interrupt source (connect pins 18 and 21 to test my sample, that'll generate interrupts at 500hz) and it will go into infinite reboot cycle.

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:812
load:0x40078000,len:0
load:0x40078000,len:11584
entry 0x40078a60
Setting up PWM...
Attaching interrupt...
Connecting to WIFI...
Guru Meditation Error: Core  1 panic'ed (Cache disabled but cached memory region accessed)

Core 1 register dump:
PC      : 0x4010fd10  PS      : 0x00060034  A0      : 0x80080e72  A1      : 0x3ffc0bb0
A2      : 0x3ffc3934  A3      : 0x00000004  A4      : 0x3ffc1044  A5      : 0x3ffd0a90
A6      : 0x00000000  A7      : 0x00000005  A8      : 0x8008119d  A9      : 0x00000001
A10     : 0x00000004  A11     : 0x3ffd0c7c  A12     : 0x00000000  A13     : 0x00000002
A14     : 0x3ff42000  A15     : 0x700000bb  SAR     : 0x00000018  EXCCAUSE: 0x00000007
EXCVADDR: 0x00000000  LBEG    : 0x4000164d  LEND    : 0x40001667  LCOUNT  : 0xfffffffd
Core 1 was running in ISR context:
EPC1    : 0x4008f451  EPC2    : 0x00000000  EPC3    : 0x00000000  EPC4    : 0x4010fd10

Backtrace: 0x4010fd10:0x3ffc0bb0 0x40080e6f:0x3ffc0bd0 0x40080ead:0x3ffc0bf0 0x400816cd:0x3ffc0c10 0x4008f44e:0x00000000

Rebooting...

Decoded:

0x40078000: ?? ??:0
0x40078000: ?? ??:0
0x40078a60: ?? ??:0
0x4010fd10: pthread_getspecific at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/pthread/./pthread_local_storage.c:173
0x4000164d: ?? ??:0
0x40001667: ?? ??:0
0x4008f451: esp_rom_spiflash_read_data at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spi_flash/./spi_flash_rom_patch.c:412
0x4010fd10: pthread_getspecific at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/pthread/./pthread_local_storage.c:173
0x4010fd10: pthread_getspecific at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/pthread/./pthread_local_storage.c:173
0x40080e6f: handleInterrupt() at C:\.Dev\Sources\IOT\platformio\esp32\esp32_micros_in_interrupt_test/src/main.cpp:12
0x40080ead: __onPinInterrupt at C:\users\brainsucker\.platformio\packages\framework-arduinoespressif32@src-537c58760dafe7fcc8a1d9bbcf00b6f6\cores\esp32/esp32-hal-gpio.c:211
0x400816cd: _xt_lowint1 at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/./xtensa_vectors.S:1105
0x4008f44e: esp_rom_spiflash_read_data at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spi_flash/./spi_flash_rom_patch.c:412

Sketch:

#include <Arduino.h>
#include <WiFi.h>

static const int PIN_INTERRUPT = 21;
static const int PIN_PWM = 18;

int freq = 500;
int ledChannel = 0;
int resolution = 8;

 void IRAM_ATTR handleInterrupt() {
   micros();//millis();
}

void setup() {
  Serial.begin(115200);

  Serial.println("Setting up PWM...");

  ledcSetup(ledChannel, freq, resolution);
  ledcAttachPin(PIN_PWM, ledChannel);
  ledcWrite(ledChannel, 33);

  Serial.println("Attaching interrupt...");

   pinMode(PIN_INTERRUPT, INPUT_PULLUP);
   attachInterrupt(digitalPinToInterrupt(PIN_INTERRUPT), handleInterrupt, CHANGE);

   Serial.println("Connecting to WIFI...");

   WiFi.mode(WIFI_STA);
   WiFi.begin("111", "111");
   while (WiFi.waitForConnectResult() != WL_CONNECTED) {
     Serial.println("Connection Failed! Rebooting...");
     delay(5000);
     ESP.restart();
   }
}

void loop() {
 }

[igrr]

#1424 solves this issue.