/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/private/base/SkAssert.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkFeatures.h"
#include "include/private/base/SkMalloc.h"
#include <algorithm>
#include <cstdlib>
#if defined(SK_BUILD_FOR_MAC) ||
defined(SK_BUILD_FOR_IOS)
#include <malloc/malloc.h>
#elif defined(SK_BUILD_FOR_ANDROID) ||
defined(SK_BUILD_FOR_UNIX)
#include <malloc.h>
#elif defined(SK_BUILD_FOR_WIN)
#include <malloc.h>
#endif
#if defined(SK_DEBUG) &&
defined(SK_BUILD_FOR_WIN)
#include <intrin.h>
// This is a super stable value and setting it here avoids pulling in all of windows.h.
#ifndef FAST_FAIL_FATAL_APP_EXIT
#define FAST_FAIL_FATAL_APP_EXIT 7
#endif
#endif
#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
#define SK_DEBUGFAILF(fmt, ...) SK_ABORT(fmt
"\n", __VA_ARGS__)
#else
#define SK_DEBUGFAILF(fmt, ...) SkASSERT((SkDebugf(fmt
"\n", __VA_ARGS__),
false))
#endif
static inline void sk_out_of_memory(size_t size) {
SK_DEBUGFAILF(
"sk_out_of_memory (asked for %zu bytes)",
size);
#if defined(SK_BUILD_FOR_AFL_FUZZ)
exit(1);
#else
abort();
#endif
}
static inline void* throw_on_failure(size_t size,
void* p) {
if (size > 0 && p == nullptr) {
// If we've got a nullptr here, the only reason we should have failed is running out of RAM.
sk_out_of_memory(size);
}
return p;
}
bool sk_abort_is_enabled() {
return true; }
void sk_abort_no_print() {
#if defined(SK_DEBUG) &&
defined(SK_BUILD_FOR_WIN)
__fastfail(FAST_FAIL_FATAL_APP_EXIT);
#elif defined(__clang__)
__builtin_trap();
#else
abort();
#endif
}
void sk_out_of_memory(
void) {
SkDEBUGFAIL(
"sk_out_of_memory");
#if defined(SK_BUILD_FOR_AFL_FUZZ)
exit(1);
#else
abort();
#endif
}
void* sk_realloc_throw(
void* addr, size_t size) {
if (size == 0) {
sk_free(addr);
return nullptr;
}
return throw_on_failure(size, realloc(addr, size));
}
void sk_free(
void* p) {
// The guard here produces a performance improvement across many tests, and many platforms.
// Removing the check was tried in skia cl 588037.
if (p != nullptr) {
free(p);
}
}
void* sk_malloc_flags(size_t size,
unsigned flags) {
void* p;
if (flags & SK_MALLOC_ZERO_INITIALIZE) {
p = calloc(size, 1);
}
else {
#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) &&
defined(__BIONIC__)
/* TODO: After b/169449588 is fixed, we will want to change this to restore
* original behavior instead of always disabling the flag.
* TODO: After b/158870657 is fixed and scudo is used globally, we can assert when an
* an error is returned.
*/
// malloc() generally doesn't initialize its memory and that's a huge security hole,
// so Android has replaced its malloc() with one that zeros memory,
// but that's a huge performance hit for HWUI, so turn it back off again.
(
void)mallopt(M_THREAD_DISABLE_MEM_INIT, 1);
#endif
p = malloc(size);
#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) &&
defined(__BIONIC__)
(
void)mallopt(M_THREAD_DISABLE_MEM_INIT, 0);
#endif
}
if (flags & SK_MALLOC_THROW) {
return throw_on_failure(size, p);
}
else {
return p;
}
}
size_t sk_malloc_size(
void* addr, size_t size) {
size_t completeSize = size;
// Use the OS specific calls to find the actual capacity.
#if defined(SK_BUILD_FOR_MAC) ||
defined(SK_BUILD_FOR_IOS)
// TODO: remove the max, when the chrome implementation of malloc_size doesn't return 0.
completeSize = std::max(malloc_size(addr), size);
#elif defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 17
completeSize = malloc_usable_size(addr);
SkASSERT(completeSize >= size);
#elif defined(SK_BUILD_FOR_UNIX)
completeSize = malloc_usable_size(addr);
SkASSERT(completeSize >= size);
#elif defined(SK_BUILD_FOR_WIN)
completeSize = _msize(addr);
SkASSERT(completeSize >= size);
#endif
return completeSize;
}
