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#include <string>
#include <sstream>
#include <thread>
#include "capture_utility.h"
#include "capture-manager.h"
namespace SlangCapture
{
CaptureManager::CaptureManager(uint64_t globalSessionHandle)
: m_encoder(&m_memoryStream)
{
std::stringstream ss;
ss << "gs-"<< globalSessionHandle <<"-t-"<<std::this_thread::get_id() << ".cap";
m_captureFileDirectory = m_captureFileDirectory / "slang-capture";
if (!std::filesystem::exists(m_captureFileDirectory))
{
std::error_code ec;
if (!std::filesystem::create_directory(m_captureFileDirectory, ec))
{
slangCaptureLog(LogLevel::Error, "Fail to create directory: %s, error (%d): %s\n",
m_captureFileDirectory.string().c_str(), ec.value(), ec.message().c_str());
}
}
std::filesystem::path captureFilePath = m_captureFileDirectory / ss.str();
m_fileStream = std::make_unique<FileOutputStream>(captureFilePath.string());
}
void CaptureManager::clearWithHeader(const ApiCallId& callId, uint64_t handleId)
{
m_memoryStream.flush();
FunctionHeader header;
header.callId = callId;
header.handleId = handleId;
// write header to memory stream
m_memoryStream.write(&header, sizeof(FunctionHeader));
}
void CaptureManager::clearWithTailer()
{
m_memoryStream.flush();
FunctionTailer tailer;
// write header to memory stream
m_memoryStream.write(&tailer, sizeof(FunctionTailer));
}
ParameterEncoder* CaptureManager::beginMethodCapture(const ApiCallId& callId, uint64_t handleId)
{
clearWithHeader(callId, handleId);
return &m_encoder;
}
ParameterEncoder* CaptureManager::endMethodCapture()
{
FunctionHeader* pHeader = const_cast<FunctionHeader*>(
reinterpret_cast<const FunctionHeader*>(m_memoryStream.getData()));
pHeader->dataSizeInBytes = m_memoryStream.getSizeInBytes() - sizeof(FunctionHeader);
std::hash<std::thread::id> hasher;
pHeader->threadId = hasher(std::this_thread::get_id());
// write capture data to file
m_fileStream->write(m_memoryStream.getData(), m_memoryStream.getSizeInBytes());
// take effect of the write
m_fileStream->flush();
// clear the memory stream
m_memoryStream.flush();
clearWithTailer();
return &m_encoder;
}
void CaptureManager::endMethodCaptureAppendOutput()
{
FunctionTailer* pTailer = const_cast<FunctionTailer*>(
reinterpret_cast<const FunctionTailer*>(m_memoryStream.getData()));
pTailer->dataSizeInBytes = (uint32_t)(m_memoryStream.getSizeInBytes() - sizeof(FunctionTailer));
// write capture data to file
m_fileStream->write(m_memoryStream.getData(), m_memoryStream.getSizeInBytes());
// take effect of the write
m_fileStream->flush();
// clear the memory stream
m_memoryStream.flush();
}
}
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