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/* libs/pixelflinger/codeflinger/CodeCache.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <cutils/ashmem.h>
#include <cutils/atomic.h>
#define LOG_TAG "CodeCache"
#include <cutils/log.h>
#include "CodeCache.h"
namespace android {
// ----------------------------------------------------------------------------
#if defined(__arm__) || defined(__aarch64__)
#include <unistd.h>
#include <errno.h>
#endif
#if defined(__mips__)
#include <asm/cachectl.h>
#include <errno.h>
#endif
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// A dlmalloc mspace is used to manage the code cache over a mmaped region.
#define HAVE_MMAP 0
#define HAVE_MREMAP 0
#define HAVE_MORECORE 0
#define MALLOC_ALIGNMENT 16
#define MSPACES 1
#define NO_MALLINFO 1
#define ONLY_MSPACES 1
// Custom heap error handling.
#define PROCEED_ON_ERROR 0
static void heap_error(const char* msg, const char* function, void* p);
#define CORRUPTION_ERROR_ACTION(m) \
heap_error("HEAP MEMORY CORRUPTION", __FUNCTION__, NULL)
#define USAGE_ERROR_ACTION(m,p) \
heap_error("ARGUMENT IS INVALID HEAP ADDRESS", __FUNCTION__, p)
#include "../../../../bionic/libc/upstream-dlmalloc/malloc.c"
static void heap_error(const char* msg, const char* function, void* p) {
ALOG(LOG_FATAL, LOG_TAG, "@@@ ABORTING: CODE FLINGER: %s IN %s addr=%p",
msg, function, p);
/* So that we can get a memory dump around p */
*((int **) 0xdeadbaad) = (int *) p;
}
// ----------------------------------------------------------------------------
static void* gExecutableStore = NULL;
static mspace gMspace = NULL;
const size_t kMaxCodeCacheCapacity = 1024 * 1024;
static mspace getMspace()
{
if (gExecutableStore == NULL) {
int fd = ashmem_create_region("CodeFlinger code cache",
kMaxCodeCacheCapacity);
LOG_ALWAYS_FATAL_IF(fd < 0,
"Creating code cache, ashmem_create_region "
"failed with error '%s'", strerror(errno));
gExecutableStore = mmap(NULL, kMaxCodeCacheCapacity,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE, fd, 0);
LOG_ALWAYS_FATAL_IF(gExecutableStore == MAP_FAILED,
"Creating code cache, mmap failed with error "
"'%s'", strerror(errno));
close(fd);
gMspace = create_mspace_with_base(gExecutableStore, kMaxCodeCacheCapacity,
/*locked=*/ false);
mspace_set_footprint_limit(gMspace, kMaxCodeCacheCapacity);
}
return gMspace;
}
Assembly::Assembly(size_t size)
: mCount(1), mSize(0)
{
mBase = (uint32_t*)mspace_malloc(getMspace(), size);
LOG_ALWAYS_FATAL_IF(mBase == NULL,
"Failed to create Assembly of size %zd in executable "
"store of size %zd", size, kMaxCodeCacheCapacity);
mSize = size;
}
Assembly::~Assembly()
{
mspace_free(getMspace(), mBase);
}
void Assembly::incStrong(const void*) const
{
android_atomic_inc(&mCount);
}
void Assembly::decStrong(const void*) const
{
if (android_atomic_dec(&mCount) == 1) {
delete this;
}
}
ssize_t Assembly::size() const
{
if (!mBase) return NO_MEMORY;
return mSize;
}
uint32_t* Assembly::base() const
{
return mBase;
}
ssize_t Assembly::resize(size_t newSize)
{
mBase = (uint32_t*)mspace_realloc(getMspace(), mBase, newSize);
LOG_ALWAYS_FATAL_IF(mBase == NULL,
"Failed to resize Assembly to %zd in code cache "
"of size %zd", newSize, kMaxCodeCacheCapacity);
mSize = newSize;
return size();
}
// ----------------------------------------------------------------------------
CodeCache::CodeCache(size_t size)
: mCacheSize(size), mCacheInUse(0)
{
pthread_mutex_init(&mLock, 0);
}
CodeCache::~CodeCache()
{
pthread_mutex_destroy(&mLock);
}
sp<Assembly> CodeCache::lookup(const AssemblyKeyBase& keyBase) const
{
pthread_mutex_lock(&mLock);
sp<Assembly> r;
ssize_t index = mCacheData.indexOfKey(key_t(keyBase));
if (index >= 0) {
const cache_entry_t& e = mCacheData.valueAt(index);
e.when = mWhen++;
r = e.entry;
}
pthread_mutex_unlock(&mLock);
return r;
}
int CodeCache::cache( const AssemblyKeyBase& keyBase,
const sp<Assembly>& assembly)
{
pthread_mutex_lock(&mLock);
const ssize_t assemblySize = assembly->size();
while (mCacheInUse + assemblySize > mCacheSize) {
// evict the LRU
size_t lru = 0;
size_t count = mCacheData.size();
for (size_t i=0 ; i<count ; i++) {
const cache_entry_t& e = mCacheData.valueAt(i);
if (e.when < mCacheData.valueAt(lru).when) {
lru = i;
}
}
const cache_entry_t& e = mCacheData.valueAt(lru);
mCacheInUse -= e.entry->size();
mCacheData.removeItemsAt(lru);
}
ssize_t err = mCacheData.add(key_t(keyBase), cache_entry_t(assembly, mWhen));
if (err >= 0) {
mCacheInUse += assemblySize;
mWhen++;
// synchronize caches...
void* base = assembly->base();
void* curr = (uint8_t*)base + assembly->size();
__builtin___clear_cache(base, curr);
}
pthread_mutex_unlock(&mLock);
return err;
}
// ----------------------------------------------------------------------------
}; // namespace android
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