[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/debug/unit_tests/furi/furi_memmgr_test.c

@@ -0,0 +1,100 @@
+#include "../minunit.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+// this test is not accurate, but gives a basic understanding
+// that memory management is working fine
+
+// do not include memmgr.h here
+// we also test that we are linking against stdlib
+extern size_t memmgr_get_free_heap(void);
+extern size_t memmgr_get_minimum_free_heap(void);
+
+// current heap managment realization consume:
+// X bytes after allocate and 0 bytes after allocate and free,
+// where X = sizeof(void*) + sizeof(size_t), look to BlockLink_t
+const size_t heap_overhead_max_size = sizeof(void*) + sizeof(size_t);
+
+bool heap_equal(size_t heap_size, size_t heap_size_old) {
+    // heap borders with overhead
+    const size_t heap_low = heap_size_old - heap_overhead_max_size;
+    const size_t heap_high = heap_size_old + heap_overhead_max_size;
+
+    // not extact, so we must test it against bigger numbers than "overhead size"
+    const bool result = ((heap_size >= heap_low) && (heap_size <= heap_high));
+
+    // debug allocation info
+    if(!result) {
+        printf("\n(hl: %zu) <= (p: %zu) <= (hh: %zu)\n", heap_low, heap_size, heap_high);
+    }
+
+    return result;
+}
+
+void test_furi_memmgr() {
+    size_t heap_size = 0;
+    size_t heap_size_old = 0;
+    const int alloc_size = 128;
+
+    void* ptr = NULL;
+    void* original_ptr = NULL;
+
+    // do not include furi memmgr.h case
+#ifdef FURI_MEMMGR_GUARD
+    mu_fail("do not link against furi memmgr.h");
+#endif
+
+    // allocate memory case
+    heap_size_old = memmgr_get_free_heap();
+    ptr = malloc(alloc_size);
+    heap_size = memmgr_get_free_heap();
+    mu_assert_pointers_not_eq(ptr, NULL);
+    mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "allocate failed");
+
+    // free memory case
+    heap_size_old = memmgr_get_free_heap();
+    free(ptr);
+    ptr = NULL;
+    heap_size = memmgr_get_free_heap();
+    mu_assert(heap_equal(heap_size, heap_size_old + alloc_size), "free failed");
+
+    // reallocate memory case
+
+    // get filled array with some data
+    original_ptr = malloc(alloc_size);
+    mu_assert_pointers_not_eq(original_ptr, NULL);
+    for(int i = 0; i < alloc_size; i++) {
+        *(unsigned char*)(original_ptr + i) = i;
+    }
+
+    // malloc array and copy data
+    ptr = malloc(alloc_size);
+    mu_assert_pointers_not_eq(ptr, NULL);
+    memcpy(ptr, original_ptr, alloc_size);
+
+    // reallocate array
+    heap_size_old = memmgr_get_free_heap();
+    ptr = realloc(ptr, alloc_size * 2);
+    heap_size = memmgr_get_free_heap();
+    mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "reallocate failed");
+    mu_assert_int_eq(memcmp(original_ptr, ptr, alloc_size), 0);
+    free(original_ptr);
+    free(ptr);
+
+    // allocate and zero-initialize array (calloc)
+    original_ptr = malloc(alloc_size);
+    mu_assert_pointers_not_eq(original_ptr, NULL);
+
+    for(int i = 0; i < alloc_size; i++) {
+        *(unsigned char*)(original_ptr + i) = 0;
+    }
+    heap_size_old = memmgr_get_free_heap();
+    ptr = calloc(1, alloc_size);
+    heap_size = memmgr_get_free_heap();
+    mu_assert(heap_equal(heap_size, heap_size_old - alloc_size), "callocate failed");
+    mu_assert_int_eq(memcmp(original_ptr, ptr, alloc_size), 0);
+
+    free(original_ptr);
+    free(ptr);
+}