aboutsummaryrefslogtreecommitdiffstats
path: root/Assembly.h
diff options
context:
space:
mode:
authorchriseth <c@ethdev.com>2015-04-24 23:35:16 +0800
committerchriseth <c@ethdev.com>2015-04-30 17:42:02 +0800
commitb9d7387e7abbb1f4fa7f7c32a3757386e75e5650 (patch)
treed64555fc0ef31be5d2a60a1fa1800bc79a346749 /Assembly.h
downloaddexon-solidity-b9d7387e7abbb1f4fa7f7c32a3757386e75e5650.tar.gz
dexon-solidity-b9d7387e7abbb1f4fa7f7c32a3757386e75e5650.tar.zst
dexon-solidity-b9d7387e7abbb1f4fa7f7c32a3757386e75e5650.zip
Move assembly related files to libevmasm and Params.h/.cpp to libevmcore.
Diffstat (limited to 'Assembly.h')
-rw-r--r--Assembly.h132
1 files changed, 132 insertions, 0 deletions
diff --git a/Assembly.h b/Assembly.h
new file mode 100644
index 00000000..b4850f7d
--- /dev/null
+++ b/Assembly.h
@@ -0,0 +1,132 @@
+/*
+ This file is part of cpp-ethereum.
+
+ cpp-ethereum is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ cpp-ethereum is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Assembly.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2014
+ */
+
+#pragma once
+
+#include <iostream>
+#include <sstream>
+#include <libdevcore/Common.h>
+#include <libdevcore/Assertions.h>
+#include <libevmcore/Instruction.h>
+#include <libevmasm/SourceLocation.h>
+#include <libevmasm/AssemblyItem.h>
+#include "Exceptions.h"
+#include <json/json.h>
+
+namespace Json
+{
+class Value;
+}
+namespace dev
+{
+namespace eth
+{
+
+class Assembly
+{
+public:
+ Assembly() {}
+
+ AssemblyItem newTag() { return AssemblyItem(Tag, m_usedTags++); }
+ AssemblyItem newPushTag() { return AssemblyItem(PushTag, m_usedTags++); }
+ AssemblyItem newData(bytes const& _data) { h256 h = (u256)std::hash<std::string>()(asString(_data)); m_data[h] = _data; return AssemblyItem(PushData, h); }
+ AssemblyItem newSub(Assembly const& _sub) { m_subs.push_back(_sub); return AssemblyItem(PushSub, m_subs.size() - 1); }
+ AssemblyItem newPushString(std::string const& _data) { h256 h = (u256)std::hash<std::string>()(_data); m_strings[h] = _data; return AssemblyItem(PushString, h); }
+ AssemblyItem newPushSubSize(u256 const& _subId) { return AssemblyItem(PushSubSize, _subId); }
+
+ AssemblyItem append() { return append(newTag()); }
+ void append(Assembly const& _a);
+ void append(Assembly const& _a, int _deposit);
+ AssemblyItem const& append(AssemblyItem const& _i);
+ AssemblyItem const& append(std::string const& _data) { return append(newPushString(_data)); }
+ AssemblyItem const& append(bytes const& _data) { return append(newData(_data)); }
+ AssemblyItem appendSubSize(Assembly const& _a) { auto ret = newSub(_a); append(newPushSubSize(ret.data())); return ret; }
+ /// Pushes the final size of the current assembly itself. Use this when the code is modified
+ /// after compilation and CODESIZE is not an option.
+ void appendProgramSize() { append(AssemblyItem(PushProgramSize)); }
+
+ AssemblyItem appendJump() { auto ret = append(newPushTag()); append(Instruction::JUMP); return ret; }
+ AssemblyItem appendJumpI() { auto ret = append(newPushTag()); append(Instruction::JUMPI); return ret; }
+ AssemblyItem appendJump(AssemblyItem const& _tag) { auto ret = append(_tag.pushTag()); append(Instruction::JUMP); return ret; }
+ AssemblyItem appendJumpI(AssemblyItem const& _tag) { auto ret = append(_tag.pushTag()); append(Instruction::JUMPI); return ret; }
+ template <class T> Assembly& operator<<(T const& _d) { append(_d); return *this; }
+ AssemblyItems const& getItems() const { return m_items; }
+ AssemblyItem const& back() const { return m_items.back(); }
+ std::string backString() const { return m_items.size() && m_items.back().type() == PushString ? m_strings.at((h256)m_items.back().data()) : std::string(); }
+
+ void onePath() { if (asserts(!m_totalDeposit && !m_baseDeposit)) BOOST_THROW_EXCEPTION(InvalidDeposit()); m_baseDeposit = m_deposit; m_totalDeposit = INT_MAX; }
+ void otherPath() { donePath(); m_totalDeposit = m_deposit; m_deposit = m_baseDeposit; }
+ void donePaths() { donePath(); m_totalDeposit = m_baseDeposit = 0; }
+ void ignored() { m_baseDeposit = m_deposit; }
+ void endIgnored() { m_deposit = m_baseDeposit; m_baseDeposit = 0; }
+
+ void popTo(int _deposit) { while (m_deposit > _deposit) append(Instruction::POP); }
+
+ void injectStart(AssemblyItem const& _i);
+ std::string out() const;
+ int deposit() const { return m_deposit; }
+ void adjustDeposit(int _adjustment) { m_deposit += _adjustment; if (asserts(m_deposit >= 0)) BOOST_THROW_EXCEPTION(InvalidDeposit()); }
+ void setDeposit(int _deposit) { m_deposit = _deposit; if (asserts(m_deposit >= 0)) BOOST_THROW_EXCEPTION(InvalidDeposit()); }
+
+ /// Changes the source location used for each appended item.
+ void setSourceLocation(SourceLocation const& _location) { m_currentSourceLocation = _location; }
+
+ bytes assemble() const;
+ Assembly& optimise(bool _enable);
+ Json::Value stream(
+ std::ostream& _out,
+ std::string const& _prefix = "",
+ const StringMap &_sourceCodes = StringMap(),
+ bool _inJsonFormat = false
+ ) const;
+
+protected:
+ std::string getLocationFromSources(StringMap const& _sourceCodes, SourceLocation const& _location) const;
+ void donePath() { if (m_totalDeposit != INT_MAX && m_totalDeposit != m_deposit) BOOST_THROW_EXCEPTION(InvalidDeposit()); }
+ unsigned bytesRequired() const;
+
+private:
+ Json::Value streamAsmJson(std::ostream& _out, const StringMap &_sourceCodes) const;
+ std::ostream& streamAsm(std::ostream& _out, std::string const& _prefix, StringMap const& _sourceCodes) const;
+ Json::Value createJsonValue(std::string _name, int _begin, int _end, std::string _value = std::string(), std::string _jumpType = std::string()) const;
+
+protected:
+ unsigned m_usedTags = 0;
+ AssemblyItems m_items;
+ mutable std::map<h256, bytes> m_data;
+ std::vector<Assembly> m_subs;
+ std::map<h256, std::string> m_strings;
+
+ int m_deposit = 0;
+ int m_baseDeposit = 0;
+ int m_totalDeposit = 0;
+
+ SourceLocation m_currentSourceLocation;
+};
+
+inline std::ostream& operator<<(std::ostream& _out, Assembly const& _a)
+{
+ _a.stream(_out);
+ return _out;
+}
+
+}
+}