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[demo_newlib] add heap size check

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stnolting 2022-07-07 22:16:38 +02:00
parent 5a759c1580
commit 4897ca2b3c
1 changed files with 17 additions and 5 deletions
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22
sw/example/demo_newlib/main.c
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@ -52,6 +52,12 @@
/**@}*/
/**********************************************************************//**
* @name Max heap size (from linker script)
**************************************************************************/
extern const unsigned __crt0_max_heap;
/**********************************************************************//**
* Main function: Check some of newlib's core functions.
*
@ -78,6 +84,15 @@ int main() {
// say hello
neorv32_uart0_printf("<<< Newlib demo/test program >>>\n\n");
// heap size definition
volatile uint32_t max_heap = (uint32_t)&__crt0_max_heap;
if (max_heap > 0){
neorv32_uart0_printf("MAX heap size: %u bytes\n", max_heap);
}
else {
neorv32_uart0_printf("ERROR! No heap size defined (linker script -> '__heap_size')!\n");
return -1;
}
// check if newlib is really available
#ifndef __NEWLIB__
@ -90,14 +105,12 @@ int main() {
neorv32_uart0_printf("<rand> test... ");
srand(neorv32_cpu_csr_read(CSR_CYCLE)); // set random seed
neorv32_uart0_printf("%i, %i, %i, %i ", rand() % 100, rand() % 100, rand() % 100, rand() % 100);
neorv32_uart0_printf("ok\n");
char *char_buffer; // pointer for dynamic memory allocation
neorv32_uart0_printf("<malloc> test... ");
neorv32_uart0_printf("<malloc> test...\n");
char_buffer = (char *) malloc(4 * sizeof(char)); // 4 bytes
neorv32_uart0_printf("ok\n");
// do not test read & write in simulation as there would be no UART RX input
if (NEORV32_SYSINFO.SOC & (1<<SYSINFO_SOC_IS_SIM)) {
@ -117,9 +130,8 @@ int main() {
neorv32_uart0_printf("\nok\n");
}
neorv32_uart0_printf("<free> test... ");
neorv32_uart0_printf("<free> test...\n");
free(char_buffer);
neorv32_uart0_printf("ok\n");
// NOTE: exit is highly oversized as it also includes clean-up functions (destructors), which