/*
* find all the leaders (instruction) in the InstrList given,
* leaders returned as an ArrayList(set) of Instruction*
*/
ArrayList *findLeaders(InstrList *iList){
Instruction *temp_ins;
ArrayList *leaders = al_newGeneric(AL_LIST_SET, addressCompare, refPrint, NULL);
int i=0;
//add first instr into leader list
Instruction *instr = getInstruction(iList, i);
al_add(leaders, (void *)(instr->addr));
for(i=0;i<iList->numInstrs;i++){
Instruction *instr = getInstruction(iList, i);
//ignore non-jump instructions and native invocations
if(!isBranch(iList, instr) &&
!isRetInstruction(iList, instr) &&
!(isInvokeInstruction(iList, instr) && INSTR_HAS_FLAG(instr, INSTR_IS_SCRIPT_INVOKE))
)
continue;
/* add:
* instr as target of jump
* instr immediately after jump
*/
if(isBranch(iList, instr)){
if(!instr->jmpOffset){
printInstruction(instr);
}
assert(instr->jmpOffset);
al_add(leaders, (void *)(instr->addr + instr->jmpOffset));
assert(instr->length>0);
al_add(leaders, (void *)(instr->addr + instr->length));
}
else if(isRetInstruction(iList, instr)){
if(i < iList->numInstrs-1){
temp_ins = getInstruction(iList, i+1);
al_add(leaders, (void *)(temp_ins->addr));
}
}
else{ //non-native invoke and document.write() which generate code
if(i < iList->numInstrs-1){
assert(isInvokeInstruction(iList, instr) && INSTR_HAS_FLAG(instr, INSTR_IS_SCRIPT_INVOKE));
temp_ins = getInstruction(iList, i+1);
al_add(leaders, (void *)(temp_ins->addr));
}
}
}
return leaders;
}
void ForestCell::_updateBounds()
{
mIsDirty = false;
mBounds = Box3F::Invalid;
mLargestItem = ForestItem::Invalid;
F32 radius;
if ( isBranch() )
{
for ( U32 i=0; i < 4; i++ )
{
mBounds.intersect( mSubCells[i]->getBounds() );
radius = mSubCells[i]->mLargestItem.getRadius();
if ( radius > mLargestItem.getRadius() )
mLargestItem = mSubCells[i]->mLargestItem;
}
return;
}
// Loop thru all the items in this cell.
Vector<ForestItem>::const_iterator item = mItems.begin();
for ( ; item != mItems.end(); item++ )
{
mBounds.intersect( (*item).getWorldBox() );
radius = (*item).getRadius();
if ( radius > mLargestItem.getRadius() )
mLargestItem = (*item);
}
}
list listWritedReg(instruction ins, int dico_entry) {
list L=NULL;
if(ins.value==-1) {
return L; //Si l'instruction est invalide
}
switch(dico_data[dico_entry].type) {
case 0: //R type
if(ins.r.rd!=0) {
L=insert(ins.r.rd,L);
}
break;
case 1: //I type (il faut separer les branchs, qui n'ont pas le meme comportement)
if(isBranch(dico_entry)!=0) { //Si ce n'est pas une branch, on write rt
if(ins.i.rt!=0) {
L=insert(ins.i.rt,L);
}
}
break;
default: //J type no register
break;
}
//printList(L);
return L;
}
static PTXInstruction* getBranch(block_iterator block)
{
if(block->instructions.empty()) return nullptr;
auto ptxBranch = static_cast<ir::PTXInstruction*>(
block->instructions.back());
if(!ptxBranch->isBranch()) return nullptr;
return ptxBranch;
}
int NCodeHook<ArchT>::getMinOffset(const unsigned char* codePtr, unsigned int jumpPatchSize) {
_DecodeResult result;
_DecodedInst instructions[MaxInstructions];
unsigned int instructionCount = 0;
result = distorm_decode(0, codePtr, 20, ArchT::DisasmType, instructions, MaxInstructions, &instructionCount);
if (result != DECRES_SUCCESS) return -1;
unsigned int offset = 0;
for (unsigned int i = 0; offset < jumpPatchSize && i < instructionCount; ++i) {
if (isBranch((const char*)instructions[i].mnemonic.p)) return -1;
offset += instructions[i].size;
}
// If we were unable to disassemble enough instructions we fail.
if (offset < jumpPatchSize) return -1;
return offset;
}
// Can this statement forego codegen?
bool isTrivial() const {return !isBranch() && !isEffect();}
const ForestItem& ForestCell::insertItem( ForestItemKey key,
ForestItemData *data,
const MatrixF &xfm,
F32 scale )
{
AssertFatal( key != 0, "ForestCell::insertItem() - Got null key!" );
AssertFatal( data != NULL, "ForestCell::insertItem() - Got null datablock!" );
// Make sure we update the bounds later.
mIsDirty = true;
// PhysicsBody is now invalid and must be rebuilt later.
SAFE_DELETE( mPhysicsRep[0] );
SAFE_DELETE( mPhysicsRep[1] );
// Destroy batches so we recreate it on
// the next next render.
freeBatches();
// Ok... do we need to split this cell?
if ( isLeaf() && mItems.size() > MaxItems )
{
// Add the children.
for ( U32 i=0; i < 4; i++ )
mSubCells[i] = new ForestCell( _makeChildRect( i ) );
// Now push all our current children down.
Vector<ForestItem>::iterator item = mItems.begin();
for ( ; item != mItems.end(); item++ )
{
U32 index = _getSubCell( item->getPosition().x, item->getPosition().y );
mSubCells[index]->insertItem( item->getKey(),
item->getData(),
item->getTransform(),
item->getScale() );
}
// Clean up.
mItems.clear();
mItems.compact();
}
// Do we have children?
if ( isBranch() )
{
// Ok... kick this item down then.
U32 index = _getSubCell( xfm.getPosition().x, xfm.getPosition().y );
const ForestItem &result = mSubCells[index]->insertItem( key, data, xfm, scale );
AssertFatal( index == _getSubCell( result.getPosition().x, result.getPosition().y ), "ForestCell::insertItem() - binning is hosed." );
return result;
}
// Do the datablock preload here to insure it happens
// before an item is used in the scene.
data->preload();
// First see if we can find it. This is nifty so
// I'll explain it a bit more.
//
// The find function does a binary search thru the
// sorted item list.
//
// If found the index is the position of the item.
//
// If not found the index is the correct insertion
// position for adding the new item.
//
// So not only do we have a fast find which is worst
// case O(log n)... but we also have the proper insert
// position to maintain a sorted item list.
//
U32 index;
bool found = findIndexByKey( key, &index );
// If we didn't find one then insert it.
if ( !found )
mItems.insert( index );
// Update the item settings.
ForestItem &item = mItems[ index ];
item.setData( data );
item.setTransform( xfm, scale );
if ( !found )
item.setKey( key );
return item;
}
void computeBytecodeBasicBlocks(CodeBlock* codeBlock, Vector<RefPtr<BytecodeBasicBlock> >& basicBlocks)
{
Vector<unsigned, 32> jumpTargets;
computePreciseJumpTargets(codeBlock, jumpTargets);
// Create the entry and exit basic blocks.
BytecodeBasicBlock* entry = new BytecodeBasicBlock(BytecodeBasicBlock::EntryBlock);
basicBlocks.append(adoptRef(entry));
BytecodeBasicBlock* exit = new BytecodeBasicBlock(BytecodeBasicBlock::ExitBlock);
// Find basic block boundaries.
BytecodeBasicBlock* current = new BytecodeBasicBlock(0, 0);
linkBlocks(entry, current);
basicBlocks.append(adoptRef(current));
bool nextInstructionIsLeader = false;
Interpreter* interpreter = codeBlock->vm()->interpreter;
Instruction* instructionsBegin = codeBlock->instructions().begin();
unsigned instructionCount = codeBlock->instructions().size();
for (unsigned bytecodeOffset = 0; bytecodeOffset < instructionCount;) {
OpcodeID opcodeID = interpreter->getOpcodeID(instructionsBegin[bytecodeOffset].u.opcode);
unsigned opcodeLength = opcodeLengths[opcodeID];
bool createdBlock = false;
// If the current bytecode is a jump target, then it's the leader of its own basic block.
if (isJumpTarget(opcodeID, jumpTargets, bytecodeOffset) || nextInstructionIsLeader) {
BytecodeBasicBlock* block = new BytecodeBasicBlock(bytecodeOffset, opcodeLength);
basicBlocks.append(adoptRef(block));
current = block;
createdBlock = true;
nextInstructionIsLeader = false;
bytecodeOffset += opcodeLength;
}
// If the current bytecode is a branch or a return, then the next instruction is the leader of its own basic block.
if (isBranch(opcodeID) || isTerminal(opcodeID) || isThrow(opcodeID))
nextInstructionIsLeader = true;
if (createdBlock)
continue;
// Otherwise, just add to the length of the current block.
current->addBytecodeLength(opcodeLength);
bytecodeOffset += opcodeLength;
}
// Link basic blocks together.
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* block = basicBlocks[i].get();
if (block->isEntryBlock() || block->isExitBlock())
continue;
bool fallsThrough = true;
for (unsigned bytecodeOffset = block->leaderBytecodeOffset(); bytecodeOffset < block->leaderBytecodeOffset() + block->totalBytecodeLength();) {
const Instruction& currentInstruction = instructionsBegin[bytecodeOffset];
OpcodeID opcodeID = interpreter->getOpcodeID(currentInstruction.u.opcode);
unsigned opcodeLength = opcodeLengths[opcodeID];
// If we found a terminal bytecode, link to the exit block.
if (isTerminal(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderBytecodeOffset() + block->totalBytecodeLength());
linkBlocks(block, exit);
fallsThrough = false;
break;
}
// If we found a throw, get the HandlerInfo for this instruction to see where we will jump.
// If there isn't one, treat this throw as a terminal. This is true even if we have a finally
// block because the finally block will create its own catch, which will generate a HandlerInfo.
if (isThrow(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderBytecodeOffset() + block->totalBytecodeLength());
HandlerInfo* handler = codeBlock->handlerForBytecodeOffset(bytecodeOffset);
fallsThrough = false;
if (!handler) {
linkBlocks(block, exit);
break;
}
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (handler->target == otherBlock->leaderBytecodeOffset()) {
linkBlocks(block, otherBlock);
break;
}
}
break;
}
// If we found a branch, link to the block(s) that we jump to.
if (isBranch(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderBytecodeOffset() + block->totalBytecodeLength());
Vector<unsigned, 1> bytecodeOffsetsJumpedTo;
findJumpTargetsForBytecodeOffset(codeBlock, bytecodeOffset, bytecodeOffsetsJumpedTo);
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (bytecodeOffsetsJumpedTo.contains(otherBlock->leaderBytecodeOffset()))
linkBlocks(block, otherBlock);
}
if (isUnconditionalBranch(opcodeID))
fallsThrough = false;
break;
}
bytecodeOffset += opcodeLength;
}
// If we fall through then link to the next block in program order.
if (fallsThrough) {
ASSERT(i + 1 < basicBlocks.size());
BytecodeBasicBlock* nextBlock = basicBlocks[i + 1].get();
linkBlocks(block, nextBlock);
}
}
basicBlocks.append(adoptRef(exit));
}
bool DecodedInstruction::isJmp() const {
// if it's conditional branch, it's not a jmp
return isBranch(false);
}
void BytecodeBasicBlock::computeImpl(Block* codeBlock, Instruction* instructionsBegin, unsigned instructionCount, Vector<std::unique_ptr<BytecodeBasicBlock>>& basicBlocks)
{
Vector<unsigned, 32> jumpTargets;
computePreciseJumpTargets(codeBlock, instructionsBegin, instructionCount, jumpTargets);
auto appendBlock = [&] (std::unique_ptr<BytecodeBasicBlock>&& block) {
block->m_index = basicBlocks.size();
basicBlocks.append(WTFMove(block));
};
auto linkBlocks = [&] (BytecodeBasicBlock* from, BytecodeBasicBlock* to) {
from->addSuccessor(to);
};
// Create the entry and exit basic blocks.
basicBlocks.reserveCapacity(jumpTargets.size() + 2);
auto entry = std::make_unique<BytecodeBasicBlock>(BytecodeBasicBlock::EntryBlock);
auto firstBlock = std::make_unique<BytecodeBasicBlock>(0, 0);
linkBlocks(entry.get(), firstBlock.get());
appendBlock(WTFMove(entry));
BytecodeBasicBlock* current = firstBlock.get();
appendBlock(WTFMove(firstBlock));
auto exit = std::make_unique<BytecodeBasicBlock>(BytecodeBasicBlock::ExitBlock);
bool nextInstructionIsLeader = false;
Interpreter* interpreter = codeBlock->vm()->interpreter;
for (unsigned bytecodeOffset = 0; bytecodeOffset < instructionCount;) {
OpcodeID opcodeID = interpreter->getOpcodeID(instructionsBegin[bytecodeOffset]);
unsigned opcodeLength = opcodeLengths[opcodeID];
bool createdBlock = false;
// If the current bytecode is a jump target, then it's the leader of its own basic block.
if (isJumpTarget(opcodeID, jumpTargets, bytecodeOffset) || nextInstructionIsLeader) {
auto newBlock = std::make_unique<BytecodeBasicBlock>(bytecodeOffset, opcodeLength);
current = newBlock.get();
appendBlock(WTFMove(newBlock));
createdBlock = true;
nextInstructionIsLeader = false;
bytecodeOffset += opcodeLength;
}
// If the current bytecode is a branch or a return, then the next instruction is the leader of its own basic block.
if (isBranch(opcodeID) || isTerminal(opcodeID) || isThrow(opcodeID))
nextInstructionIsLeader = true;
if (createdBlock)
continue;
// Otherwise, just add to the length of the current block.
current->addLength(opcodeLength);
bytecodeOffset += opcodeLength;
}
// Link basic blocks together.
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* block = basicBlocks[i].get();
if (block->isEntryBlock() || block->isExitBlock())
continue;
bool fallsThrough = true;
for (unsigned bytecodeOffset = block->leaderOffset(); bytecodeOffset < block->leaderOffset() + block->totalLength();) {
OpcodeID opcodeID = interpreter->getOpcodeID(instructionsBegin[bytecodeOffset]);
unsigned opcodeLength = opcodeLengths[opcodeID];
// If we found a terminal bytecode, link to the exit block.
if (isTerminal(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderOffset() + block->totalLength());
linkBlocks(block, exit.get());
fallsThrough = false;
break;
}
// If we found a throw, get the HandlerInfo for this instruction to see where we will jump.
// If there isn't one, treat this throw as a terminal. This is true even if we have a finally
// block because the finally block will create its own catch, which will generate a HandlerInfo.
if (isThrow(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderOffset() + block->totalLength());
auto* handler = codeBlock->handlerForBytecodeOffset(bytecodeOffset);
fallsThrough = false;
if (!handler) {
linkBlocks(block, exit.get());
break;
}
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (handler->target == otherBlock->leaderOffset()) {
linkBlocks(block, otherBlock);
break;
}
}
break;
}
// If we found a branch, link to the block(s) that we jump to.
if (isBranch(opcodeID)) {
ASSERT(bytecodeOffset + opcodeLength == block->leaderOffset() + block->totalLength());
Vector<unsigned, 1> bytecodeOffsetsJumpedTo;
findJumpTargetsForBytecodeOffset(codeBlock, instructionsBegin, bytecodeOffset, bytecodeOffsetsJumpedTo);
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (bytecodeOffsetsJumpedTo.contains(otherBlock->leaderOffset()))
linkBlocks(block, otherBlock);
}
if (isUnconditionalBranch(opcodeID))
fallsThrough = false;
break;
}
bytecodeOffset += opcodeLength;
}
// If we fall through then link to the next block in program order.
if (fallsThrough) {
ASSERT(i + 1 < basicBlocks.size());
BytecodeBasicBlock* nextBlock = basicBlocks[i + 1].get();
linkBlocks(block, nextBlock);
}
}
appendBlock(WTFMove(exit));
for (auto& basicBlock : basicBlocks)
basicBlock->shrinkToFit();
}
void BytecodeBasicBlock::computeImpl(Block* codeBlock, const InstructionStream& instructions, Vector<std::unique_ptr<BytecodeBasicBlock>>& basicBlocks)
{
Vector<InstructionStream::Offset, 32> jumpTargets;
computePreciseJumpTargets(codeBlock, instructions, jumpTargets);
auto appendBlock = [&] (std::unique_ptr<BytecodeBasicBlock>&& block) {
block->m_index = basicBlocks.size();
basicBlocks.append(WTFMove(block));
};
auto linkBlocks = [&] (BytecodeBasicBlock* from, BytecodeBasicBlock* to) {
from->addSuccessor(to);
};
// Create the entry and exit basic blocks.
basicBlocks.reserveCapacity(jumpTargets.size() + 2);
auto entry = std::make_unique<BytecodeBasicBlock>(BytecodeBasicBlock::EntryBlock);
auto firstBlock = std::make_unique<BytecodeBasicBlock>(BytecodeBasicBlock::EntryBlock);
linkBlocks(entry.get(), firstBlock.get());
appendBlock(WTFMove(entry));
BytecodeBasicBlock* current = firstBlock.get();
appendBlock(WTFMove(firstBlock));
auto exit = std::make_unique<BytecodeBasicBlock>(BytecodeBasicBlock::ExitBlock);
bool nextInstructionIsLeader = false;
for (const auto& instruction : instructions) {
auto bytecodeOffset = instruction.offset();
OpcodeID opcodeID = instruction->opcodeID();
bool createdBlock = false;
// If the current bytecode is a jump target, then it's the leader of its own basic block.
if (isJumpTarget(opcodeID, jumpTargets, bytecodeOffset) || nextInstructionIsLeader) {
auto newBlock = std::make_unique<BytecodeBasicBlock>(instruction);
current = newBlock.get();
appendBlock(WTFMove(newBlock));
createdBlock = true;
nextInstructionIsLeader = false;
}
// If the current bytecode is a branch or a return, then the next instruction is the leader of its own basic block.
if (isBranch(opcodeID) || isTerminal(opcodeID) || isThrow(opcodeID))
nextInstructionIsLeader = true;
if (createdBlock)
continue;
// Otherwise, just add to the length of the current block.
current->addLength(instruction->size());
}
// Link basic blocks together.
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* block = basicBlocks[i].get();
if (block->isEntryBlock() || block->isExitBlock())
continue;
bool fallsThrough = true;
for (auto bytecodeOffset : block->offsets()) {
auto instruction = instructions.at(bytecodeOffset);
OpcodeID opcodeID = instruction->opcodeID();
// If we found a terminal bytecode, link to the exit block.
if (isTerminal(opcodeID)) {
ASSERT(bytecodeOffset + instruction->size() == block->leaderOffset() + block->totalLength());
linkBlocks(block, exit.get());
fallsThrough = false;
break;
}
// If we found a throw, get the HandlerInfo for this instruction to see where we will jump.
// If there isn't one, treat this throw as a terminal. This is true even if we have a finally
// block because the finally block will create its own catch, which will generate a HandlerInfo.
if (isThrow(opcodeID)) {
ASSERT(bytecodeOffset + instruction->size() == block->leaderOffset() + block->totalLength());
auto* handler = codeBlock->handlerForBytecodeOffset(instruction.offset());
fallsThrough = false;
if (!handler) {
linkBlocks(block, exit.get());
break;
}
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (handler->target == otherBlock->leaderOffset()) {
linkBlocks(block, otherBlock);
break;
}
}
break;
}
// If we found a branch, link to the block(s) that we jump to.
if (isBranch(opcodeID)) {
ASSERT(bytecodeOffset + instruction->size() == block->leaderOffset() + block->totalLength());
Vector<InstructionStream::Offset, 1> bytecodeOffsetsJumpedTo;
findJumpTargetsForInstruction(codeBlock, instruction, bytecodeOffsetsJumpedTo);
size_t numberOfJumpTargets = bytecodeOffsetsJumpedTo.size();
ASSERT(numberOfJumpTargets);
for (unsigned i = 0; i < basicBlocks.size(); i++) {
BytecodeBasicBlock* otherBlock = basicBlocks[i].get();
if (bytecodeOffsetsJumpedTo.contains(otherBlock->leaderOffset())) {
linkBlocks(block, otherBlock);
--numberOfJumpTargets;
if (!numberOfJumpTargets)
break;
}
}
// numberOfJumpTargets may not be 0 here if there are multiple jumps targeting the same
// basic blocks (e.g. in a switch type opcode). Since we only decrement numberOfJumpTargets
// once per basic block, the duplicates are not accounted for. For our purpose here,
// that doesn't matter because we only need to link to the target block once regardless
// of how many ways this block can jump there.
if (isUnconditionalBranch(opcodeID))
fallsThrough = false;
break;
}
}
// If we fall through then link to the next block in program order.
if (fallsThrough) {
ASSERT(i + 1 < basicBlocks.size());
BytecodeBasicBlock* nextBlock = basicBlocks[i + 1].get();
linkBlocks(block, nextBlock);
}
}
appendBlock(WTFMove(exit));
for (auto& basicBlock : basicBlocks)
basicBlock->shrinkToFit();
}
bool XmlNode::isLeaf() { return !isBranch(); }
void x86RevDis::RevDisasm(uint32 uStartAddr, uint32 uCurAddr)
{
CPU_ADDR curAddr;
curAddr.addr32.offset = uCurAddr;
for (unsigned i=uCurAddr-uStartAddr;i<m_uSize;)
{
x86dis_insn* insn = (x86dis_insn*)m_decoder.decode(m_pCode+i,m_uSize-i,curAddr);
m_mapResult.insert(std::map<uint32,x86dis_insn>::value_type(curAddr.addr32.offset,*insn));
const char* pcsIns = m_decoder.str(insn,DIS_STYLE_HEX_ASMSTYLE | DIS_STYLE_HEX_UPPERCASE | DIS_STYLE_HEX_NOZEROPAD);
//printf("%08X\t%s\n",curAddr.addr32.offset, pcsIns);
i += insn->size;
curAddr.addr32.offset += insn->size;
switch (isBranch(insn))
{
case br_return:
return;
case br_jump:
{
CPU_ADDR branch = branchAddr(insn);
if (branch.addr32.offset<uStartAddr
|| branch.addr32.offset>uStartAddr+m_uSize)
{
//跳转到的地址不在本段代码内
break;
}
std::map<uint32,x86dis_insn>::iterator it = m_mapResult.find(branch.addr32.offset);
if (it!=m_mapResult.end())
{
//已经反过了
break;
}
return RevDisasm(uStartAddr,branch.addr32.offset);
}
case br_jXX:
case br_call:
{
CPU_ADDR branch = branchAddr(insn);
if (branch.addr32.offset<uStartAddr
|| branch.addr32.offset>uStartAddr+m_uSize)
{
//跳转到的地址不在本段代码内
break;
}
std::map<uint32,x86dis_insn>::iterator it = m_mapResult.find(branch.addr32.offset);
if (it!=m_mapResult.end())
{
//已经反过了
break;
}
RevDisasm(uStartAddr,branch.addr32.offset);
}
break;
}
}
}