Siva Chandra Reddy 02a543db66 [libc] Add a simple implementation of the posix_spawn function.
The implementation currently ignores all spawn attributes. Support for
them will be added in future changes.

A simple allocator for integration tests has been added so that the
integration test for posix_spawn can use the
posix_spawn_file_actions_add* functions.

Reviewed By: michaelrj

Differential Revision: https://reviews.llvm.org/D135752
2022-10-13 18:47:47 +00:00

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//===-- Simple malloc and free for use with integration tests -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <stddef.h>
#include <stdint.h>
// Integration tests cannot use the SCUDO standalone allocator as SCUDO pulls
// various other parts of the libc. Since SCUDO development does not use
// LLVM libc build rules, it is very hard to keep track or pull all that SCUDO
// requires. Hence, as a work around for this problem, we use a simple allocator
// which just hands out continuous blocks from a statically allocated chunk of
// memory.
static uint8_t memory[16384];
static uint8_t *ptr = memory;
extern "C" {
void *malloc(size_t s) {
void *mem = ptr;
ptr += s;
return mem;
}
void free(void *) {}
} // extern "C"