OVMS3-idf/components/heap/test/test_malloc_caps.c
Martin Vychodil 7491ea677a esp32s2: IRAM/DRAM memory protection
* new mem_prot API
* mem_prot on & locked by default (see Kconfig)
* feature activated in start_cpu0_default()

JIRA IDF-1355
2020-04-21 15:10:58 +02:00

184 lines
6.8 KiB
C

/*
Tests for the capabilities-based memory allocator.
*/
#include <esp_types.h>
#include <stdio.h>
#include "unity.h"
#include "esp_attr.h"
#include "esp_heap_caps.h"
#include "esp_spi_flash.h"
#include <stdlib.h>
#include <sys/param.h>
#ifndef CONFIG_ESP32S2_MEMPROT_FEATURE
TEST_CASE("Capabilities allocator test", "[heap]")
{
char *m1, *m2[10];
int x;
size_t free8start, free32start, free8, free32;
/* It's important we printf() something before we take the empty heap sizes,
as the first printf() in a task allocates heap resources... */
printf("Testing capabilities allocator...\n");
free8start = heap_caps_get_free_size(MALLOC_CAP_8BIT);
free32start = heap_caps_get_free_size(MALLOC_CAP_32BIT);
printf("Free 8bit-capable memory (start): %dK, 32-bit capable memory %dK\n", free8start, free32start);
TEST_ASSERT(free32start >= free8start);
printf("Allocating 10K of 8-bit capable RAM\n");
m1= heap_caps_malloc(10*1024, MALLOC_CAP_8BIT);
printf("--> %p\n", m1);
free8 = heap_caps_get_free_size(MALLOC_CAP_8BIT);
free32 = heap_caps_get_free_size(MALLOC_CAP_32BIT);
printf("Free 8bit-capable memory (both reduced): %dK, 32-bit capable memory %dK\n", free8, free32);
//Both should have gone down by 10K; 8bit capable ram is also 32-bit capable
TEST_ASSERT(free8<(free8start-10*1024));
TEST_ASSERT(free32<(free32start-10*1024));
//Assume we got DRAM back
TEST_ASSERT((((int)m1)&0xFF000000)==0x3F000000);
free(m1);
//The goal here is to allocate from IRAM. Since there is no external IRAM (yet)
//the following gives size of IRAM-only (not D/IRAM) memory.
size_t free_iram = heap_caps_get_free_size(MALLOC_CAP_INTERNAL) -
heap_caps_get_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);
size_t alloc32 = MIN(free_iram / 2, 10*1024) & (~3);
if(free_iram) {
printf("Freeing; allocating %u bytes of 32K-capable RAM\n", alloc32);
m1 = heap_caps_malloc(alloc32, MALLOC_CAP_32BIT);
printf("--> %p\n", m1);
//Check that we got IRAM back
TEST_ASSERT((((int)m1)&0xFF000000)==0x40000000);
free8 = heap_caps_get_free_size(MALLOC_CAP_8BIT);
free32 = heap_caps_get_free_size(MALLOC_CAP_32BIT);
printf("Free 8bit-capable memory (after 32-bit): %dK, 32-bit capable memory %dK\n", free8, free32);
//Only 32-bit should have gone down by alloc32: 32-bit isn't necessarily 8bit capable
TEST_ASSERT(free32<(free32start-alloc32));
TEST_ASSERT(free8==free8start);
free(m1);
} else {
printf("This platform has no 32-bit only capable RAM, jumping to next test \n");
}
printf("Allocating impossible caps\n");
m1= heap_caps_malloc(10*1024, MALLOC_CAP_8BIT|MALLOC_CAP_EXEC);
printf("--> %p\n", m1);
TEST_ASSERT(m1==NULL);
if(free_iram) {
printf("Testing changeover iram -> dram");
// priorities will exhaust IRAM first, then start allocating from DRAM
for (x=0; x<10; x++) {
m2[x]= heap_caps_malloc(alloc32, MALLOC_CAP_32BIT);
printf("--> %p\n", m2[x]);
}
TEST_ASSERT((((int)m2[0])&0xFF000000)==0x40000000);
TEST_ASSERT((((int)m2[9])&0xFF000000)==0x3F000000);
} else {
printf("This platform has no IRAM-only so changeover will never occur, jumping to next test\n");
}
printf("Test if allocating executable code still gives IRAM, even with dedicated IRAM region depleted\n");
if(free_iram) {
// (the allocation should come from D/IRAM)
free_iram = heap_caps_get_free_size(MALLOC_CAP_EXEC);
m1= heap_caps_malloc(MIN(free_iram / 2, 10*1024), MALLOC_CAP_EXEC);
printf("--> %p\n", m1);
TEST_ASSERT((((int)m1)&0xFF000000)==0x40000000);
for (x=0; x<10; x++) free(m2[x]);
} else {
// (the allocation should come from D/IRAM)
free_iram = heap_caps_get_free_size(MALLOC_CAP_EXEC);
m1= heap_caps_malloc(MIN(free_iram / 2, 10*1024), MALLOC_CAP_EXEC);
printf("--> %p\n", m1);
TEST_ASSERT((((int)m1)&0xFF000000)==0x40000000);
}
free(m1);
printf("Done.\n");
}
#endif
#ifdef CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY
TEST_CASE("IRAM_8BIT capability test", "[heap]")
{
uint8_t *ptr;
size_t free_size, free_size32, largest_free_size;
/* need to print something as first printf allocates some heap */
printf("IRAM_8BIT capability test\n");
free_size = heap_caps_get_free_size(MALLOC_CAP_IRAM_8BIT);
free_size32 = heap_caps_get_free_size(MALLOC_CAP_32BIT);
largest_free_size = heap_caps_get_largest_free_block(MALLOC_CAP_IRAM_8BIT);
ptr = heap_caps_malloc(largest_free_size, MALLOC_CAP_IRAM_8BIT);
TEST_ASSERT((((int)ptr)&0xFF000000)==0x40000000);
TEST_ASSERT(heap_caps_get_free_size(MALLOC_CAP_IRAM_8BIT) == (free_size - largest_free_size));
TEST_ASSERT(heap_caps_get_free_size(MALLOC_CAP_32BIT) == (free_size32 - largest_free_size));
free(ptr);
}
#endif
TEST_CASE("heap_caps metadata test", "[heap]")
{
/* need to print something as first printf allocates some heap */
printf("heap_caps metadata test\n");
heap_caps_print_heap_info(MALLOC_CAP_8BIT);
heap_caps_print_heap_info(MALLOC_CAP_32BIT);
multi_heap_info_t original;
heap_caps_get_info(&original, MALLOC_CAP_8BIT);
void *b = heap_caps_malloc(original.largest_free_block, MALLOC_CAP_8BIT);
TEST_ASSERT_NOT_NULL(b);
printf("After allocating %d bytes:\n", original.largest_free_block);
heap_caps_print_heap_info(MALLOC_CAP_8BIT);
multi_heap_info_t after;
heap_caps_get_info(&after, MALLOC_CAP_8BIT);
TEST_ASSERT(after.largest_free_block < original.largest_free_block);
TEST_ASSERT(after.total_free_bytes < original.total_free_bytes);
free(b);
heap_caps_get_info(&after, MALLOC_CAP_8BIT);
/* Allow some leeway here, because LWIP sometimes allocates up to 144 bytes in the background
as part of timer management.
*/
TEST_ASSERT_INT32_WITHIN(200, after.total_free_bytes, original.total_free_bytes);
TEST_ASSERT_INT32_WITHIN(200, after.largest_free_block, original.largest_free_block);
TEST_ASSERT(after.minimum_free_bytes < original.total_free_bytes);
}
/* Small function runs from IRAM to check that malloc/free/realloc
all work OK when cache is disabled...
*/
static IRAM_ATTR __attribute__((noinline)) bool iram_malloc_test(void)
{
spi_flash_guard_get()->start(); // Disables flash cache
bool result = true;
void *x = heap_caps_malloc(64, MALLOC_CAP_32BIT);
result = result && (x != NULL);
void *y = heap_caps_realloc(x, 32, MALLOC_CAP_32BIT);
result = result && (y != NULL);
heap_caps_free(y);
spi_flash_guard_get()->end(); // Re-enables flash cache
return result;
}
TEST_CASE("heap_caps_xxx functions work with flash cache disabled", "[heap]")
{
TEST_ASSERT( iram_malloc_test() );
}