initial commit

libs/newlib/heap.c

@@ -0,0 +1,139 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <sys/reent.h>
+#include <errno.h>
+#include <malloc.h>
+#include "esp_heap_caps.h"
+
+/*
+ These contain the business logic for the malloc() and realloc() implementation. Because of heap tracing
+ wrapping reasons, we do not want these to be a public api, however, so they're not defined publicly.
+*/
+extern void *heap_caps_malloc_default(size_t size);
+extern void *heap_caps_realloc_default(void *ptr, size_t size);
+extern void *heap_caps_aligned_alloc_default(size_t alignment, size_t size);
+
+void* malloc(size_t size)
+{
+    return heap_caps_malloc_default(size);
+}
+
+void* calloc(size_t n, size_t size)
+{
+    return _calloc_r(_REENT, n, size);
+}
+
+void* realloc(void* ptr, size_t size)
+{
+    return heap_caps_realloc_default(ptr, size);
+}
+
+void free(void *ptr)
+{
+    heap_caps_free(ptr);
+}
+
+void* _malloc_r(struct _reent *r, size_t size)
+{
+    return heap_caps_malloc_default(size);
+}
+
+void _free_r(struct _reent *r, void* ptr)
+{
+    heap_caps_free(ptr);
+}
+
+void* _realloc_r(struct _reent *r, void* ptr, size_t size)
+{
+    return heap_caps_realloc_default(ptr, size);
+}
+
+void* _calloc_r(struct _reent *r, size_t nmemb, size_t size)
+{
+    void *result;
+    size_t size_bytes;
+    if (__builtin_mul_overflow(nmemb, size, &size_bytes)) {
+        return NULL;
+    }
+
+    result = heap_caps_malloc_default(size_bytes);
+    if (result != NULL) {
+        bzero(result, size_bytes);
+    }
+    return result;
+}
+
+void* memalign(size_t alignment, size_t n)
+{
+    return heap_caps_aligned_alloc_default(alignment, n);
+}
+
+void* aligned_alloc(size_t alignment, size_t n)
+{
+    return heap_caps_aligned_alloc_default(alignment, n);
+}
+
+int posix_memalign(void **out_ptr, size_t alignment, size_t size)
+{
+    if (size == 0) {
+        /* returning NULL for zero size is allowed, don't treat this as an error */
+        *out_ptr = NULL;
+        return 0;
+    }
+    void *result = heap_caps_aligned_alloc_default(alignment, size);
+    if (result != NULL) {
+        /* Modify output pointer only on success */
+        *out_ptr = result;
+        return 0;
+    }
+    /* Note: error returned, not set via errno! */
+    return ENOMEM;
+}
+
+/* No-op function, used to force linking this file,
+   instead of the heap implementation from newlib.
+ */
+void newlib_include_heap_impl(void)
+{
+}
+
+/* The following functions are implemented by newlib's heap allocator,
+   but aren't available in the heap component.
+   Define them as non-functional stubs here, so that the application
+   can not cause the newlib heap implementation to be linked in
+ */
+
+int malloc_trim(size_t pad)
+{
+    return 0; // indicates failure
+}
+
+size_t malloc_usable_size(void* p)
+{
+    return 0;
+}
+
+void malloc_stats(void)
+{
+}
+
+int mallopt(int parameter_number, int parameter_value)
+{
+    return 0; // indicates failure
+}
+
+struct mallinfo mallinfo(void)
+{
+    struct mallinfo dummy = {0};
+    return dummy;
+}
+
+void* valloc(size_t n) __attribute__((alias("malloc")));
+void* pvalloc(size_t n) __attribute__((alias("malloc")));
+void cfree(void* p) __attribute__((alias("free")));