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#include "llvm/Config/config.h"
#include "../RPCChannel.h"
#include "../RemoteTarget.h"
#include "../RemoteTargetMessage.h"
#include "llvm/Support/Memory.h"
#include <assert.h>
#include <map>
#include <stdint.h>
#include <string>
#include <vector>
using namespace llvm;
class LLIChildTarget {
public:
void initialize();
LLIMessageType waitForIncomingMessage();
void handleMessage(LLIMessageType messageType);
RemoteTarget *RT;
RPCChannel RPC;
private:
// Incoming message handlers
void handleAllocateSpace();
void handleLoadSection(bool IsCode);
void handleExecute();
// Outgoing message handlers
void sendChildActive();
void sendAllocationResult(uint64_t Addr);
void sendLoadStatus(uint32_t Status);
void sendExecutionComplete(int Result);
// OS-specific functions
void initializeConnection();
int WriteBytes(const void *Data, size_t Size) {
return RPC.WriteBytes(Data, Size) ? Size : -1;
}
int ReadBytes(void *Data, size_t Size) {
return RPC.ReadBytes(Data, Size) ? Size : -1;
}
// Communication handles (OS-specific)
void *ConnectionData;
};
int main() {
LLIChildTarget ThisChild;
ThisChild.RT = new RemoteTarget();
ThisChild.initialize();
LLIMessageType MsgType;
do {
MsgType = ThisChild.waitForIncomingMessage();
ThisChild.handleMessage(MsgType);
} while (MsgType != LLI_Terminate &&
MsgType != LLI_Error);
delete ThisChild.RT;
return 0;
}
// Public methods
void LLIChildTarget::initialize() {
RPC.createClient();
sendChildActive();
}
LLIMessageType LLIChildTarget::waitForIncomingMessage() {
int32_t MsgType = -1;
if (ReadBytes(&MsgType, 4) > 0)
return (LLIMessageType)MsgType;
return LLI_Error;
}
void LLIChildTarget::handleMessage(LLIMessageType messageType) {
switch (messageType) {
case LLI_AllocateSpace:
handleAllocateSpace();
break;
case LLI_LoadCodeSection:
handleLoadSection(true);
break;
case LLI_LoadDataSection:
handleLoadSection(false);
break;
case LLI_Execute:
handleExecute();
break;
case LLI_Terminate:
RT->stop();
break;
default:
// FIXME: Handle error!
break;
}
}
// Incoming message handlers
void LLIChildTarget::handleAllocateSpace() {
// Read and verify the message data size.
uint32_t DataSize = 0;
int rc = ReadBytes(&DataSize, 4);
(void)rc;
assert(rc == 4);
assert(DataSize == 8);
// Read the message arguments.
uint32_t Alignment = 0;
uint32_t AllocSize = 0;
rc = ReadBytes(&Alignment, 4);
assert(rc == 4);
rc = ReadBytes(&AllocSize, 4);
assert(rc == 4);
// Allocate the memory.
uint64_t Addr;
RT->allocateSpace(AllocSize, Alignment, Addr);
// Send AllocationResult message.
sendAllocationResult(Addr);
}
void LLIChildTarget::handleLoadSection(bool IsCode) {
// Read the message data size.
uint32_t DataSize = 0;
int rc = ReadBytes(&DataSize, 4);
(void)rc;
assert(rc == 4);
// Read the target load address.
uint64_t Addr = 0;
rc = ReadBytes(&Addr, 8);
assert(rc == 8);
size_t BufferSize = DataSize - 8;
if (!RT->isAllocatedMemory(Addr, BufferSize))
return sendLoadStatus(LLI_Status_NotAllocated);
// Read section data into previously allocated buffer
rc = ReadBytes((void*)Addr, BufferSize);
if (rc != (int)(BufferSize))
return sendLoadStatus(LLI_Status_IncompleteMsg);
// If IsCode, mark memory executable
if (IsCode)
sys::Memory::InvalidateInstructionCache((void *)Addr, BufferSize);
// Send MarkLoadComplete message.
sendLoadStatus(LLI_Status_Success);
}
void LLIChildTarget::handleExecute() {
// Read the message data size.
uint32_t DataSize = 0;
int rc = ReadBytes(&DataSize, 4);
(void)rc;
assert(rc == 4);
assert(DataSize == 8);
// Read the target address.
uint64_t Addr = 0;
rc = ReadBytes(&Addr, 8);
assert(rc == 8);
// Call function
int32_t Result = -1;
RT->executeCode(Addr, Result);
// Send ExecutionResult message.
sendExecutionComplete(Result);
}
// Outgoing message handlers
void LLIChildTarget::sendChildActive() {
// Write the message type.
uint32_t MsgType = (uint32_t)LLI_ChildActive;
int rc = WriteBytes(&MsgType, 4);
(void)rc;
assert(rc == 4);
// Write the data size.
uint32_t DataSize = 0;
rc = WriteBytes(&DataSize, 4);
assert(rc == 4);
}
void LLIChildTarget::sendAllocationResult(uint64_t Addr) {
// Write the message type.
uint32_t MsgType = (uint32_t)LLI_AllocationResult;
int rc = WriteBytes(&MsgType, 4);
(void)rc;
assert(rc == 4);
// Write the data size.
uint32_t DataSize = 8;
rc = WriteBytes(&DataSize, 4);
assert(rc == 4);
// Write the allocated address.
rc = WriteBytes(&Addr, 8);
assert(rc == 8);
}
void LLIChildTarget::sendLoadStatus(uint32_t Status) {
// Write the message type.
uint32_t MsgType = (uint32_t)LLI_LoadResult;
int rc = WriteBytes(&MsgType, 4);
(void)rc;
assert(rc == 4);
// Write the data size.
uint32_t DataSize = 4;
rc = WriteBytes(&DataSize, 4);
assert(rc == 4);
// Write the result.
rc = WriteBytes(&Status, 4);
assert(rc == 4);
}
void LLIChildTarget::sendExecutionComplete(int Result) {
// Write the message type.
uint32_t MsgType = (uint32_t)LLI_ExecutionResult;
int rc = WriteBytes(&MsgType, 4);
(void)rc;
assert(rc == 4);
// Write the data size.
uint32_t DataSize = 4;
rc = WriteBytes(&DataSize, 4);
assert(rc == 4);
// Write the result.
rc = WriteBytes(&Result, 4);
assert(rc == 4);
}
#ifdef LLVM_ON_UNIX
#include "../Unix/RPCChannel.inc"
#endif
#ifdef LLVM_ON_WIN32
#include "../Windows/RPCChannel.inc"
#endif
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