New C interface in JIT-c.h header matching the C++ interface in JIT.h.

include/evmjit/JIT-c.h

@@ -0,0 +1,66 @@
+
+#include "stdint.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct evmjit_i256
+{
+	uint64_t words[4];
+} evmjit_i256;
+
+typedef struct evmjit_runtime_data
+{
+	int64_t 	gas;
+	int64_t 	gasPrice;
+	char const* callData;
+	uint64_t 	callDataSize;
+	evmjit_i256 address;
+	evmjit_i256 caller;
+	evmjit_i256 origin;
+	evmjit_i256 callValue;
+	evmjit_i256 coinBase;
+	evmjit_i256 difficulty;
+	evmjit_i256 gasLimit;
+	uint64_t 	number;
+	int64_t 	timestamp;
+	char const* code;
+	uint64_t 	codeSize;
+	evmjit_i256	codeHash;
+} evmjit_runtime_data;
+
+typedef enum evmjit_return_code
+{
+	// Success codes
+	Stop    = 0,
+	Return  = 1,
+	Suicide = 2,
+
+	// Standard error codes
+	OutOfGas           = -1,
+	StackUnderflow     = -2,
+	BadJumpDestination = -3,
+	BadInstruction     = -4,
+	Rejected           = -5, ///< Input data (code, gas, block info, etc.) does not meet JIT requirement and execution request has been rejected
+
+	// Internal error codes
+	LLVMError           = -101,
+	UnexpectedException = -111
+} evmjit_return_code;
+
+typedef struct evmjit_context evmjit_context;
+
+evmjit_context* evmjit_create(evmjit_runtime_data* _data, void* _env);
+
+evmjit_return_code evmjit_exec(evmjit_context* _context);
+
+void evmjit_destroy(evmjit_context* _context);
+
+
+inline char const* evmjit_get_output(evmjit_runtime_data* _data) { return _data->callData; }
+inline uint64_t evmjit_get_output_size(evmjit_runtime_data* _data) { return _data->callDataSize; }
+
+#ifdef __cplusplus
+}
+#endif

include/evmjit/JIT.h

@@ -121,7 +121,7 @@ public:
 	ExecutionContext(RuntimeData& _data, Env* _env) { init(_data, _env); }
 	ExecutionContext(ExecutionContext const&) = delete;
 	ExecutionContext& operator=(ExecutionContext const&) = delete;
-	EXPORT ~ExecutionContext();
+	EXPORT ~ExecutionContext() noexcept;
 
 	void init(RuntimeData& _data, Env* _env) { m_data = &_data; m_env = _env; }
 

libevmjit/CMakeLists.txt

@@ -1,26 +1,27 @@
 set(TARGET_NAME evmjit)
 
 set(SOURCES
-    JIT.cpp				${EVMJIT_INCLUDE_DIR}/evmjit/JIT.h
+	JIT.cpp				${EVMJIT_INCLUDE_DIR}/evmjit/JIT.h
-    Arith256.cpp		Arith256.h
+	JIT-c.cpp			${EVMJIT_INCLUDE_DIR}/evmjit/JIT-c.h
-    Array.cpp			Array.h
+	Arith256.cpp		Arith256.h
-    BasicBlock.cpp		BasicBlock.h
+	Array.cpp			Array.h
-    Cache.cpp			Cache.h
+	BasicBlock.cpp		BasicBlock.h
-    					Common.h
+	Cache.cpp			Cache.h
-    Compiler.cpp		Compiler.h
+						Common.h
-    CompilerHelper.cpp	CompilerHelper.h
+	Compiler.cpp		Compiler.h
-    Endianness.cpp		Endianness.h
+	CompilerHelper.cpp	CompilerHelper.h
-    ExecStats.cpp		ExecStats.h
+	Endianness.cpp		Endianness.h
-    Ext.cpp				Ext.h
+	ExecStats.cpp		ExecStats.h
-    GasMeter.cpp		GasMeter.h
+	Ext.cpp				Ext.h
-    Instruction.cpp		Instruction.h
+	GasMeter.cpp		GasMeter.h
-    interface.cpp		interface.h
+	Instruction.cpp		Instruction.h
-    Memory.cpp			Memory.h
+	#interface.cpp		interface.h
-    Optimizer.cpp		Optimizer.h
+	Memory.cpp			Memory.h
-    RuntimeManager.cpp	RuntimeManager.h
+	Optimizer.cpp		Optimizer.h
-    Stack.cpp			Stack.h
+	RuntimeManager.cpp	RuntimeManager.h
-    Type.cpp			Type.h
+	Stack.cpp			Stack.h
-    Utils.cpp			Utils.h
+	Type.cpp			Type.h
+	Utils.cpp			Utils.h
 )
 source_group("" FILES ${SOURCES})
 
@@ -62,7 +63,7 @@ endif()
 
 if(${EVMJIT_VERSION_MAJOR} EQUAL 0)
 	set(EVMJIT_SOVERSION "0.${EVMJIT_VERSION_MINOR}")
-else()	
+else()
 	set(EVMJIT_SOVERSION ${EVMJIT_VERSION_MAJOR})
 endif()
 
@@ -73,7 +74,7 @@ configure_file(BuildInfo.h.in ${CMAKE_CURRENT_BINARY_DIR}/gen/BuildInfo.gen.h)
 message(STATUS "EVM JIT version: ${EVMJIT_VERSION_MAJOR}.${EVMJIT_VERSION_MINOR}.${EVMJIT_VERSION_PATCH} ${EVMJIT_VERSION_PRERELEASE} (${EVMJIT_VERSION_FULL})")
 
 add_library(${TARGET_NAME} SHARED ${SOURCES} gen/BuildInfo.gen.h)
-set_target_properties(${TARGET_NAME} PROPERTIES 
+set_target_properties(${TARGET_NAME} PROPERTIES
 						VERSION ${EVMJIT_VERSION} SOVERSION ${EVMJIT_SOVERSION}
 						FOLDER "libs")
 

libevmjit/JIT-c.cpp

@@ -0,0 +1,48 @@
+#include <evmjit/JIT-c.h>
+#include <cassert>
+#include <evmjit/JIT.h>
+
+extern "C"
+{
+using namespace dev::evmjit;
+
+EXPORT evmjit_context* evmjit_create(evmjit_runtime_data* _data, void* _env)
+{
+	auto data = reinterpret_cast<RuntimeData*>(_data);
+	auto env  = reinterpret_cast<Env*>(_env);
+
+	assert(!data && "Pointer to runtime data must not be null");
+	if (!data)
+		return nullptr;
+
+	// TODO: Make sure ExecutionEngine constructor does not throw + make JIT/ExecutionEngine interface all nothrow
+	auto context = new(std::nothrow) ExecutionContext{*data, env};
+	return reinterpret_cast<evmjit_context*>(context);
+}
+
+EXPORT void evmjit_destroy(evmjit_context* _context)
+{
+	auto context = reinterpret_cast<ExecutionContext*>(_context);
+	delete context;
+}
+
+EXPORT evmjit_return_code evmjit_exec(evmjit_context* _context)
+{
+	auto context = reinterpret_cast<ExecutionContext*>(_context);
+
+	assert(!context && "Invalid context");
+	if (!context)
+		return UnexpectedException;
+
+	try
+	{
+		auto returnCode = JIT::exec(*context);
+		return static_cast<evmjit_return_code>(returnCode);
+	}
+	catch(...)
+	{
+		return UnexpectedException;
+	}
+}
+
+}

libevmjit/JIT.cpp

@@ -227,7 +227,7 @@ ReturnCode JIT::exec(ExecutionContext& _context)
 
 extern "C" void ext_free(void* _data) noexcept;
 
-ExecutionContext::~ExecutionContext()
+ExecutionContext::~ExecutionContext() noexcept
 {
 	if (m_memData)
 		ext_free(m_memData); // Use helper free to check memory leaks

libevmjit/interface.cpp

@@ -1,34 +0,0 @@
-#include "evmjit/JIT.h"
-
-extern "C"
-{
-using namespace dev::evmjit;
-
-EXPORT void* evmjit_create(RuntimeData* _data, Env* _env) noexcept
-{
-	if (!_data)
-		return nullptr;
-
-	// TODO: Make sure ExecutionEngine constructor does not throw + make JIT/ExecutionEngine interface all nothrow
-	return new(std::nothrow) ExecutionContext{*_data, _env};
-}
-
-EXPORT void evmjit_destroy(ExecutionContext* _context) noexcept
-{
-	delete _context;
-}
-
-EXPORT int evmjit_run(ExecutionContext* _context) noexcept
-{
-	try
-	{
-		auto returnCode = JIT::exec(*_context);
-		return static_cast<int>(returnCode);
-	}
-	catch(...)
-	{
-		return static_cast<int>(ReturnCode::UnexpectedException);
-	}
-}
-
-}

libevmjit/interface.h

@@ -1,13 +0,0 @@
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void* evmjit_create();
-int   evmjit_run(void* _jit, void* _data, void* _env);
-void  evmjit_destroy(void* _jit);
-
-
-#ifdef __cplusplus
-}
-#endif