void _free(void *ptr)
{
t_block *block;
RETURN(!ptr || ptr > (void *)moreSpace(0, true));
block = GET_BLOCK(ptr);
RETURN(block->isFree);
mergeBlocks(&block);
block->isFree = true;
if (block == block->parent->lastBlock)
{
block->parent->lastBlock = block->prev;
block->parent->freeSize += B_SIZE(block->size);
if (!block->parent->next && block->parent->freeSize > PAGE_SIZE)
{
if (blocks != block->parent)
{
if (block->parent->prev)
block->parent->prev->next = block->parent->next;
brk(block->parent);
}
}
}
else
if (block->parent->maxFreeSize < block->size)
block->parent->maxFreeSize = block->size;
}
void convertToJump(BasicBlock* block, BasicBlock* targetBlock)
{
ASSERT(targetBlock);
ASSERT(targetBlock->isReachable);
if (targetBlock->predecessors.size() == 1) {
m_graph.dethread();
mergeBlocks(block, targetBlock, noBlocks());
} else {
Node* branch = block->terminal();
ASSERT(branch->op() == Branch || branch->op() == Switch);
block->replaceTerminal(
m_graph, SpecNone, Jump, branch->origin, OpInfo(targetBlock));
}
}
bool SimplifyControlFlowGraphPass::_mergeBlockIntoPredecessor(ir::IRKernel& k)
{
bool merged = false;
report(" Merging blocks with predecessors...");
for(ir::ControlFlowGraph::iterator block = k.cfg()->begin();
block != k.cfg()->end(); )
{
if(block == k.cfg()->get_entry_block()) { ++block; continue; }
if(block == k.cfg()->get_exit_block()) { ++block; continue; }
// Block has a single predecessor
bool singlePredecessor = block->in_edges.size() == 1;
if(!singlePredecessor) { ++block; continue; }
// Predecessor has single successor
auto predecessor = block->in_edges.back()->head;
if(predecessor == k.cfg()->get_entry_block()) { ++block; continue; }
bool singleSuccessor = predecessor->out_edges.size() == 1;
if(!singleSuccessor) { ++block; continue; }
report(" " << predecessor->label() << " <- " << block->label());
// Merge the blocks
mergeBlocks(k, predecessor, block++);
merged = true;
}
return merged;
}
memPtrSize CHeapManager::mergeIteration(memPtrSize mergeBlock)
{
if (smallMemSet.size() > 0)
{
auto smallLowerBound = smallMemSet.lower_bound(mergeBlock);
if (smallLowerBound != smallMemSet.end() &&
*smallLowerBound == mergeBlock)
{
smallLowerBound--;
}
auto smallUpperBound = smallMemSet.upper_bound(mergeBlock);
if (smallUpperBound == smallMemSet.end())
{
smallUpperBound--;
}
if (smallLowerBound != smallMemSet.end() &&
canMerge(*smallLowerBound, mergeBlock) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(*smallLowerBound, mergeBlock);
smallMemSet.erase(smallLowerBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
if (canMerge(mergeBlock, *smallUpperBound) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(mergeBlock, *smallUpperBound);
smallMemSet.erase(smallUpperBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
}
if (mediumMemSet.size() > 0)
{
auto mediumLowerBound = mediumMemSet.lower_bound(mergeBlock);
if (mediumLowerBound != mediumMemSet.end() &&
*mediumLowerBound == mergeBlock)
{
mediumLowerBound--;
}
auto mediumUpperBound = mediumMemSet.upper_bound(mergeBlock);
if (mediumUpperBound == mediumMemSet.end())
{
mediumUpperBound--;
}
if (mediumLowerBound != mediumMemSet.end() &&
canMerge(*mediumLowerBound, mergeBlock) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(*mediumLowerBound, mergeBlock);
mediumMemSet.erase(mediumLowerBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
if (canMerge(mergeBlock, *mediumUpperBound) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(mergeBlock, *mediumUpperBound);
mediumMemSet.erase(mediumUpperBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
}
if (largeMemSet.size() > 0)
{
auto largeLowerBound = largeMemSet.lower_bound(mergeBlock);
if (largeLowerBound != largeMemSet.end() &&
*largeLowerBound == mergeBlock)
{
largeLowerBound--;
}
auto largeUpperBound = largeMemSet.upper_bound(mergeBlock);
if (largeUpperBound == largeMemSet.end())
{
largeUpperBound--;
}
if (largeLowerBound != largeMemSet.end() &&
canMerge(*largeLowerBound, mergeBlock) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(*largeLowerBound, mergeBlock);
largeMemSet.erase(largeLowerBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
if (canMerge(mergeBlock, *largeUpperBound) == LMERGE)
{
memPtrSize newBlock = mergeBlocks(mergeBlock, *largeUpperBound);
largeMemSet.erase(largeUpperBound);
delFromMemSet(mergeBlock);
addToMemSet(newBlock);
return newBlock;
}
}
return (std::make_pair((void *)NULL, -1));
}
bool MergedMiner::mine(std::string address1, std::string wallet1, std::string address2, std::string wallet2, size_t threads) {
epee::net_utils::http::http_simple_client httpClient1;
epee::net_utils::http::http_simple_client httpClient2;
Miner miner;
BlockTemplate blockTemplate1;
BlockTemplate blockTemplate2;
cryptonote::block block1;
cryptonote::block block2;
cryptonote::difficulty_type difficulty1;
cryptonote::difficulty_type difficulty2;
std::future<bool> request1;
std::future<bool> request2;
std::future<bool> mining;
crypto::hash hash;
std::chrono::steady_clock::time_point time1;
uint64_t prefix1;
cryptonote::account_public_address walletAddress1;
if (!get_account_address_from_str(prefix1, walletAddress1, wallet1)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to parse donor wallet address");
return false;
}
uint64_t prefix2;
cryptonote::account_public_address walletAddress2;
if (!address2.empty() && !get_account_address_from_str(prefix2, walletAddress2, wallet2)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to parse acceptor wallet address");
return false;
}
m_blockCount = 0;
for (;;) {
miner.getHashCount();
if (m_stopped) {
if (mining.valid()) {
miner.stop();
mining.wait();
}
return true;
}
request1 = std::async(std::launch::async, getBlockTemplate, &httpClient1, &address1, &wallet1, MERGE_MINING_TAG_RESERVED_SIZE, &blockTemplate1);
if (!address2.empty()) {
request2 = std::async(std::launch::async, getBlockTemplate, &httpClient2, &address2, &wallet2, MERGE_MINING_TAG_RESERVED_SIZE, &blockTemplate2);
}
if (!request1.get()) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to get donor block");
continue;
}
if (!address2.empty()) {
if (!request2.get()) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to get acceptor block");
continue;
}
if (blockTemplate2.block.major_version != BLOCK_MAJOR_VERSION_2) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Unsupported block version received from acceptor network, merged mining is not possible");
if (mining.valid()) {
miner.stop();
mining.wait();
}
return false;
}
}
if (mining.valid()) {
miner.stop();
if (mining.get()) {
if (cryptonote::check_hash(hash, difficulty1)) {
if (submitBlock(httpClient1, address1, block1)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Submitted donor block");
} else {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to submit donor block");
}
}
if (!address2.empty() && cryptonote::check_hash(hash, difficulty2)) {
if (!mergeBlocks(block1, block2)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Internal error");
return false;
}
if (submitBlock(httpClient2, address2, block2)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Submitted acceptor block");
} else {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Failed to submit acceptor block");
}
}
}
std::chrono::steady_clock::time_point time2 = std::chrono::steady_clock::now();
std::ostringstream stream;
stream << "Hashrate: " << miner.getHashCount() / std::chrono::duration_cast<std::chrono::duration<double>>(time2 - time1).count();
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push(stream.str());
time1 = time2;
miner.start();
} else {
time1 = std::chrono::steady_clock::now();
}
block1 = blockTemplate1.block;
difficulty1 = blockTemplate1.difficulty;
cryptonote::difficulty_type difficulty = difficulty1;
if (!address2.empty()) {
block2 = blockTemplate2.block;
difficulty2 = blockTemplate2.difficulty;
difficulty = std::min(difficulty, difficulty2);
if (!fillExtra(block1, block2)) {
std::lock_guard<std::mutex> lock(m_mutex);
m_messages.push("Internal error");
return false;
}
}
mining = std::async(std::launch::async, &Miner::findNonce, &miner, &block1, blockTemplate1.height, difficulty, threads, &hash);
for (size_t i = 0; i < 50; ++i) {
if (m_stopped || mining.wait_for(std::chrono::milliseconds(100)) == std::future_status::ready) {
break;
}
}
}
}
bool run()
{
const bool extremeLogging = false;
bool outerChanged = false;
bool innerChanged;
do {
innerChanged = false;
for (BlockIndex blockIndex = 0; blockIndex < m_graph.numBlocks(); ++blockIndex) {
BasicBlock* block = m_graph.block(blockIndex);
if (!block)
continue;
ASSERT(block->isReachable);
switch (block->last()->op()) {
case Jump: {
// Successor with one predecessor -> merge.
if (block->successor(0)->predecessors.size() == 1) {
ASSERT(block->successor(0)->predecessors[0] == block);
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
mergeBlocks(block, block->successor(0), noBlocks());
innerChanged = outerChanged = true;
break;
}
// FIXME: Block only has a jump -> remove. This is tricky though because of
// liveness. What we really want is to slam in a phantom at the end of the
// block, after the terminal. But we can't right now. :-(
// Idea: what if I slam the ghosties into my successor? Nope, that's
// suboptimal, because if my successor has multiple predecessors then we'll
// be keeping alive things on other predecessor edges unnecessarily.
// What we really need is the notion of end-of-block ghosties!
break;
}
case Branch: {
// Branch on constant -> jettison the not-taken block and merge.
if (isKnownDirection(block->cfaBranchDirection)) {
bool condition = branchCondition(block->cfaBranchDirection);
BasicBlock* targetBlock = block->successorForCondition(condition);
BasicBlock* jettisonedBlock = block->successorForCondition(!condition);
if (targetBlock->predecessors.size() == 1) {
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
mergeBlocks(block, targetBlock, oneBlock(jettisonedBlock));
} else {
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
ASSERT(block->last()->isTerminal());
CodeOrigin boundaryCodeOrigin = block->last()->codeOrigin;
block->last()->convertToPhantom();
ASSERT(block->last()->refCount() == 1);
jettisonBlock(block, jettisonedBlock, boundaryCodeOrigin);
block->appendNode(
m_graph, SpecNone, Jump, boundaryCodeOrigin,
OpInfo(targetBlock));
}
innerChanged = outerChanged = true;
break;
}
if (block->successor(0) == block->successor(1)) {
convertToJump(block, block->successor(0));
innerChanged = outerChanged = true;
break;
}
// Branch to same destination -> jump.
// FIXME: this will currently not be hit because of the lack of jump-only
// block simplification.
break;
}
case Switch: {
SwitchData* data = block->last()->switchData();
// Prune out cases that end up jumping to default.
for (unsigned i = 0; i < data->cases.size(); ++i) {
if (data->cases[i].target == data->fallThrough)
data->cases[i--] = data->cases.takeLast();
}
// If there are no cases other than default then this turns
// into a jump.
if (data->cases.isEmpty()) {
convertToJump(block, data->fallThrough);
innerChanged = outerChanged = true;
break;
}
// Switch on constant -> jettison all other targets and merge.
if (block->last()->child1()->hasConstant()) {
JSValue value = m_graph.valueOfJSConstant(block->last()->child1().node());
TriState found = FalseTriState;
BasicBlock* targetBlock = 0;
for (unsigned i = data->cases.size(); found == FalseTriState && i--;) {
found = data->cases[i].value.strictEqual(value);
if (found == TrueTriState)
targetBlock = data->cases[i].target;
}
if (found == MixedTriState)
break;
if (found == FalseTriState)
targetBlock = data->fallThrough;
ASSERT(targetBlock);
Vector<BasicBlock*, 1> jettisonedBlocks;
for (unsigned i = block->numSuccessors(); i--;) {
BasicBlock* jettisonedBlock = block->successor(i);
if (jettisonedBlock != targetBlock)
jettisonedBlocks.append(jettisonedBlock);
}
if (targetBlock->predecessors.size() == 1) {
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
mergeBlocks(block, targetBlock, jettisonedBlocks);
} else {
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
CodeOrigin boundaryCodeOrigin = block->last()->codeOrigin;
block->last()->convertToPhantom();
for (unsigned i = jettisonedBlocks.size(); i--;)
jettisonBlock(block, jettisonedBlocks[i], boundaryCodeOrigin);
block->appendNode(
m_graph, SpecNone, Jump, boundaryCodeOrigin, OpInfo(targetBlock));
}
innerChanged = outerChanged = true;
break;
}
}
default:
break;
}
}
if (innerChanged) {
// Here's the reason for this pass:
// Blocks: A, B, C, D, E, F
// A -> B, C
// B -> F
// C -> D, E
// D -> F
// E -> F
//
// Assume that A's branch is determined to go to B. Then the rest of this phase
// is smart enough to simplify down to:
// A -> B
// B -> F
// C -> D, E
// D -> F
// E -> F
//
// We will also merge A and B. But then we don't have any other mechanism to
// remove D, E as predecessors for F. Worse, the rest of this phase does not
// know how to fix the Phi functions of F to ensure that they no longer refer
// to variables in D, E. In general, we need a way to handle Phi simplification
// upon:
// 1) Removal of a predecessor due to branch simplification. The branch
// simplifier already does that.
// 2) Invalidation of a predecessor because said predecessor was rendered
// unreachable. We do this here.
//
// This implies that when a block is unreachable, we must inspect its
// successors' Phi functions to remove any references from them into the
// removed block.
m_graph.invalidateCFG();
m_graph.resetReachability();
m_graph.killUnreachableBlocks();
}
if (Options::validateGraphAtEachPhase())
validate(m_graph);
} while (innerChanged);
return outerChanged;
}
bool run()
{
const bool extremeLogging = false;
bool outerChanged = false;
bool innerChanged;
do {
innerChanged = false;
for (BlockIndex blockIndex = 0; blockIndex < m_graph.m_blocks.size(); ++blockIndex) {
BasicBlock* block = m_graph.m_blocks[blockIndex].get();
if (!block)
continue;
ASSERT(block->isReachable);
switch (block->last()->op()) {
case Jump: {
// Successor with one predecessor -> merge.
if (m_graph.m_blocks[m_graph.successor(block, 0)]->m_predecessors.size() == 1) {
ASSERT(m_graph.m_blocks[m_graph.successor(block, 0)]->m_predecessors[0]
== blockIndex);
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("CFGSimplify: Jump merge on Block #%u to Block #%u.\n",
blockIndex, m_graph.successor(block, 0));
#endif
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
mergeBlocks(blockIndex, m_graph.successor(block, 0), NoBlock);
innerChanged = outerChanged = true;
break;
} else {
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("Not jump merging on Block #%u to Block #%u because predecessors = ",
blockIndex, m_graph.successor(block, 0));
for (unsigned i = 0; i < m_graph.m_blocks[m_graph.successor(block, 0)]->m_predecessors.size(); ++i) {
if (i)
dataLogF(", ");
dataLogF("#%u", m_graph.m_blocks[m_graph.successor(block, 0)]->m_predecessors[i]);
}
dataLogF(".\n");
#endif
}
// FIXME: Block only has a jump -> remove. This is tricky though because of
// liveness. What we really want is to slam in a phantom at the end of the
// block, after the terminal. But we can't right now. :-(
// Idea: what if I slam the ghosties into my successor? Nope, that's
// suboptimal, because if my successor has multiple predecessors then we'll
// be keeping alive things on other predecessor edges unnecessarily.
// What we really need is the notion of end-of-block ghosties!
break;
}
case Branch: {
// Branch on constant -> jettison the not-taken block and merge.
if (isKnownDirection(block->cfaBranchDirection)) {
bool condition = branchCondition(block->cfaBranchDirection);
BasicBlock* targetBlock = m_graph.m_blocks[
m_graph.successorForCondition(block, condition)].get();
if (targetBlock->m_predecessors.size() == 1) {
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("CFGSimplify: Known condition (%s) branch merge on Block #%u to Block #%u, jettisoning Block #%u.\n",
condition ? "true" : "false",
blockIndex, m_graph.successorForCondition(block, condition),
m_graph.successorForCondition(block, !condition));
#endif
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
mergeBlocks(
blockIndex,
m_graph.successorForCondition(block, condition),
m_graph.successorForCondition(block, !condition));
} else {
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("CFGSimplify: Known condition (%s) branch->jump conversion on Block #%u to Block #%u, jettisoning Block #%u.\n",
condition ? "true" : "false",
blockIndex, m_graph.successorForCondition(block, condition),
m_graph.successorForCondition(block, !condition));
#endif
if (extremeLogging)
m_graph.dump();
m_graph.dethread();
BlockIndex takenBlockIndex = m_graph.successorForCondition(block, condition);
BlockIndex notTakenBlockIndex = m_graph.successorForCondition(block, !condition);
ASSERT(block->last()->isTerminal());
CodeOrigin boundaryCodeOrigin = block->last()->codeOrigin;
block->last()->convertToPhantom();
ASSERT(block->last()->refCount() == 1);
jettisonBlock(blockIndex, notTakenBlockIndex, boundaryCodeOrigin);
block->appendNode(
m_graph, SpecNone, Jump, boundaryCodeOrigin,
OpInfo(takenBlockIndex));
}
innerChanged = outerChanged = true;
break;
}
if (m_graph.successor(block, 0) == m_graph.successor(block, 1)) {
BlockIndex targetBlockIndex = m_graph.successor(block, 0);
BasicBlock* targetBlock = m_graph.m_blocks[targetBlockIndex].get();
ASSERT(targetBlock);
ASSERT(targetBlock->isReachable);
if (targetBlock->m_predecessors.size() == 1) {
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("CFGSimplify: Branch to same successor merge on Block #%u to Block #%u.\n",
blockIndex, targetBlockIndex);
#endif
m_graph.dethread();
mergeBlocks(blockIndex, targetBlockIndex, NoBlock);
} else {
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("CFGSimplify: Branch->jump conversion to same successor on Block #%u to Block #%u.\n",
blockIndex, targetBlockIndex);
#endif
Node* branch = block->last();
ASSERT(branch->isTerminal());
ASSERT(branch->op() == Branch);
branch->convertToPhantom();
ASSERT(branch->refCount() == 1);
block->appendNode(
m_graph, SpecNone, Jump, branch->codeOrigin,
OpInfo(targetBlockIndex));
}
innerChanged = outerChanged = true;
break;
}
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLogF("Not branch simplifying on Block #%u because the successors differ and the condition is not known.\n",
blockIndex);
#endif
// Branch to same destination -> jump.
// FIXME: this will currently not be hit because of the lack of jump-only
// block simplification.
break;
}
default:
break;
}
}
if (innerChanged) {
// Here's the reason for this pass:
// Blocks: A, B, C, D, E, F
// A -> B, C
// B -> F
// C -> D, E
// D -> F
// E -> F
//
// Assume that A's branch is determined to go to B. Then the rest of this phase
// is smart enough to simplify down to:
// A -> B
// B -> F
// C -> D, E
// D -> F
// E -> F
//
// We will also merge A and B. But then we don't have any other mechanism to
// remove D, E as predecessors for F. Worse, the rest of this phase does not
// know how to fix the Phi functions of F to ensure that they no longer refer
// to variables in D, E. In general, we need a way to handle Phi simplification
// upon:
// 1) Removal of a predecessor due to branch simplification. The branch
// simplifier already does that.
// 2) Invalidation of a predecessor because said predecessor was rendered
// unreachable. We do this here.
//
// This implies that when a block is unreachable, we must inspect its
// successors' Phi functions to remove any references from them into the
// removed block.
m_graph.resetReachability();
for (BlockIndex blockIndex = 0; blockIndex < m_graph.m_blocks.size(); ++blockIndex) {
BasicBlock* block = m_graph.m_blocks[blockIndex].get();
if (!block)
continue;
if (block->isReachable)
continue;
killUnreachable(blockIndex);
}
}
if (Options::validateGraphAtEachPhase())
validate(m_graph);
} while (innerChanged);
return outerChanged;
}