Function debugFileTruncate

fdbrpc/TraceFileIO.cpp:164–189

Updates the in-memory copy of tracked data to account for truncates (this simply invalidates any data after truncate point)

// Updates the in-memory copy of tracked data to account for truncates (this simply invalidates any data after truncate
// point)
void debugFileTruncate(std::string context, std::string file, int64_t offset) {
	if (debugFileRegions.empty())
		debugFileSetup();
	if (debugFileTrim(file) == debugFileName) {
		bool found = false;
		for (auto itr = debugFileRegions.begin(); itr != debugFileRegions.end(); ++itr) {
			if (itr->first + itr->second > offset) {
				found = true;
				TraceEvent("DebugFileTruncate")
				    .detail("Context", context)
				    .detail("Filename", file)
				    .detail("Offset", offset);
				uint8_t* storeMask = debugFileMask[itr->first];
				ASSERT(storeMask);

				int64_t dbgOffset = std::max((int64_t)0, offset - itr->first);
				memset(&storeMask[dbgOffset], 0, itr->second - dbgOffset);
			}
		}
		if (!found)
			TraceEvent("DebugFileSkippingTruncate")
			    .detail("Context", context)
			    .detail("Filename", file)
			    .detail("Offset", offset);
	}
}

#else
void debugFileCheck(std::string context, std::string file, const void* data, int64_t offset, int length) {}