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llvm-mirror/lib/XRay/RecordInitializer.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

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//===- FDRRecordProducer.cpp - XRay FDR Mode Record Producer --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/XRay/FDRRecords.h"
namespace llvm {
namespace xray {
Error RecordInitializer::visit(BufferExtents &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr, sizeof(uint64_t)))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a buffer extent (%d).",
OffsetPtr);
auto PreReadOffset = OffsetPtr;
R.Size = E.getU64(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read buffer extent at offset %d.",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - PreReadOffset);
return Error::success();
}
Error RecordInitializer::visit(WallclockRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a wallclock record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = OffsetPtr;
R.Seconds = E.getU64(&OffsetPtr);
if (OffsetPtr == PreReadOffset)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read wall clock 'seconds' field at offset %d.", OffsetPtr);
PreReadOffset = OffsetPtr;
R.Nanos = E.getU32(&OffsetPtr);
if (OffsetPtr == PreReadOffset)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read wall clock 'nanos' field at offset %d.", OffsetPtr);
// Align to metadata record size boundary.
assert(OffsetPtr - BeginOffset <= MetadataRecord::kMetadataBodySize);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - BeginOffset);
return Error::success();
}
Error RecordInitializer::visit(NewCPUIDRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a new cpu id record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = OffsetPtr;
R.CPUId = E.getU16(&OffsetPtr);
if (OffsetPtr == PreReadOffset)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read CPU id at offset %d.", OffsetPtr);
PreReadOffset = OffsetPtr;
R.TSC = E.getU64(&OffsetPtr);
if (OffsetPtr == PreReadOffset)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read CPU TSC at offset %d.", OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - BeginOffset);
return Error::success();
}
Error RecordInitializer::visit(TSCWrapRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a new TSC wrap record (%d).",
OffsetPtr);
auto PreReadOffset = OffsetPtr;
R.BaseTSC = E.getU64(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read TSC wrap record at offset %d.",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - PreReadOffset);
return Error::success();
}
Error RecordInitializer::visit(CustomEventRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a custom event record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = OffsetPtr;
R.Size = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a custom event record size field offset %d.", OffsetPtr);
if (R.Size <= 0)
return createStringError(
std::make_error_code(std::errc::bad_address),
"Invalid size for custom event (size = %d) at offset %d.", R.Size,
OffsetPtr);
PreReadOffset = OffsetPtr;
R.TSC = E.getU64(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a custom event TSC field at offset %d.", OffsetPtr);
// For version 4 onwards, of the FDR log, we want to also capture the CPU ID
// of the custom event.
if (Version >= 4) {
PreReadOffset = OffsetPtr;
R.CPU = E.getU16(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Missing CPU field at offset %d", OffsetPtr);
}
assert(OffsetPtr > BeginOffset &&
OffsetPtr - BeginOffset <= MetadataRecord::kMetadataBodySize);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - BeginOffset);
// Next we read in a fixed chunk of data from the given offset.
if (!E.isValidOffsetForDataOfSize(OffsetPtr, R.Size))
return createStringError(
std::make_error_code(std::errc::bad_address),
"Cannot read %d bytes of custom event data from offset %d.", R.Size,
OffsetPtr);
std::vector<uint8_t> Buffer;
Buffer.resize(R.Size);
PreReadOffset = OffsetPtr;
if (E.getU8(&OffsetPtr, Buffer.data(), R.Size) != Buffer.data())
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading data into buffer of size %d at offset %d.", R.Size,
OffsetPtr);
assert(OffsetPtr >= PreReadOffset);
if (OffsetPtr - PreReadOffset != static_cast<uint32_t>(R.Size))
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading enough bytes for the custom event payload -- read %d "
"expecting %d bytes at offset %d.",
OffsetPtr - PreReadOffset, R.Size, PreReadOffset);
R.Data.assign(Buffer.begin(), Buffer.end());
return Error::success();
}
Error RecordInitializer::visit(CustomEventRecordV5 &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a custom event record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = OffsetPtr;
R.Size = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a custom event record size field offset %d.", OffsetPtr);
if (R.Size <= 0)
return createStringError(
std::make_error_code(std::errc::bad_address),
"Invalid size for custom event (size = %d) at offset %d.", R.Size,
OffsetPtr);
PreReadOffset = OffsetPtr;
R.Delta = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a custom event record TSC delta field at offset %d.",
OffsetPtr);
assert(OffsetPtr > BeginOffset &&
OffsetPtr - BeginOffset <= MetadataRecord::kMetadataBodySize);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - BeginOffset);
// Next we read in a fixed chunk of data from the given offset.
if (!E.isValidOffsetForDataOfSize(OffsetPtr, R.Size))
return createStringError(
std::make_error_code(std::errc::bad_address),
"Cannot read %d bytes of custom event data from offset %d.", R.Size,
OffsetPtr);
std::vector<uint8_t> Buffer;
Buffer.resize(R.Size);
PreReadOffset = OffsetPtr;
if (E.getU8(&OffsetPtr, Buffer.data(), R.Size) != Buffer.data())
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading data into buffer of size %d at offset %d.", R.Size,
OffsetPtr);
assert(OffsetPtr >= PreReadOffset);
if (OffsetPtr - PreReadOffset != static_cast<uint32_t>(R.Size))
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading enough bytes for the custom event payload -- read %d "
"expecting %d bytes at offset %d.",
OffsetPtr - PreReadOffset, R.Size, PreReadOffset);
R.Data.assign(Buffer.begin(), Buffer.end());
return Error::success();
}
Error RecordInitializer::visit(TypedEventRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a typed event record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = OffsetPtr;
R.Size = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a typed event record size field offset %d.", OffsetPtr);
if (R.Size <= 0)
return createStringError(
std::make_error_code(std::errc::bad_address),
"Invalid size for typed event (size = %d) at offset %d.", R.Size,
OffsetPtr);
PreReadOffset = OffsetPtr;
R.Delta = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a typed event record TSC delta field at offset %d.",
OffsetPtr);
PreReadOffset = OffsetPtr;
R.EventType = E.getU16(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Cannot read a typed event record type field at offset %d.", OffsetPtr);
assert(OffsetPtr > BeginOffset &&
OffsetPtr - BeginOffset <= MetadataRecord::kMetadataBodySize);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - BeginOffset);
// Next we read in a fixed chunk of data from the given offset.
if (!E.isValidOffsetForDataOfSize(OffsetPtr, R.Size))
return createStringError(
std::make_error_code(std::errc::bad_address),
"Cannot read %d bytes of custom event data from offset %d.", R.Size,
OffsetPtr);
std::vector<uint8_t> Buffer;
Buffer.resize(R.Size);
PreReadOffset = OffsetPtr;
if (E.getU8(&OffsetPtr, Buffer.data(), R.Size) != Buffer.data())
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading data into buffer of size %d at offset %d.", R.Size,
OffsetPtr);
assert(OffsetPtr >= PreReadOffset);
if (OffsetPtr - PreReadOffset != static_cast<uint32_t>(R.Size))
return createStringError(
std::make_error_code(std::errc::invalid_argument),
"Failed reading enough bytes for the typed event payload -- read %d "
"expecting %d bytes at offset %d.",
OffsetPtr - PreReadOffset, R.Size, PreReadOffset);
R.Data.assign(Buffer.begin(), Buffer.end());
return Error::success();
}
Error RecordInitializer::visit(CallArgRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a call argument record (%d).",
OffsetPtr);
auto PreReadOffset = OffsetPtr;
R.Arg = E.getU64(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read a call arg record at offset %d.",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - PreReadOffset);
return Error::success();
}
Error RecordInitializer::visit(PIDRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a process ID record (%d).",
OffsetPtr);
auto PreReadOffset = OffsetPtr;
R.PID = E.getSigned(&OffsetPtr, 4);
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read a process ID record at offset %d.",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - PreReadOffset);
return Error::success();
}
Error RecordInitializer::visit(NewBufferRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a new buffer record (%d).",
OffsetPtr);
auto PreReadOffset = OffsetPtr;
R.TID = E.getSigned(&OffsetPtr, sizeof(int32_t));
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Cannot read a new buffer record at offset %d.",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize - (OffsetPtr - PreReadOffset);
return Error::success();
}
Error RecordInitializer::visit(EndBufferRecord &R) {
if (!E.isValidOffsetForDataOfSize(OffsetPtr,
MetadataRecord::kMetadataBodySize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for an end-of-buffer record (%d).",
OffsetPtr);
OffsetPtr += MetadataRecord::kMetadataBodySize;
return Error::success();
}
Error RecordInitializer::visit(FunctionRecord &R) {
// For function records, we need to retreat one byte back to read a full
// unsigned 32-bit value. The first four bytes will have the following
// layout:
//
// bit 0 : function record indicator (must be 0)
// bits 1..3 : function record type
// bits 4..32 : function id
//
if (OffsetPtr == 0 || !E.isValidOffsetForDataOfSize(
--OffsetPtr, FunctionRecord::kFunctionRecordSize))
return createStringError(std::make_error_code(std::errc::bad_address),
"Invalid offset for a function record (%d).",
OffsetPtr);
auto BeginOffset = OffsetPtr;
auto PreReadOffset = BeginOffset;
uint32_t Buffer = E.getU32(&OffsetPtr);
if (PreReadOffset == OffsetPtr)
return createStringError(std::make_error_code(std::errc::bad_address),
"Cannot read function id field from offset %d.",
OffsetPtr);
// To get the function record type, we shift the buffer one to the right
// (truncating the function record indicator) then take the three bits
// (0b0111) to get the record type as an unsigned value.
unsigned FunctionType = (Buffer >> 1) & 0x07u;
switch (FunctionType) {
case static_cast<unsigned>(RecordTypes::ENTER):
case static_cast<unsigned>(RecordTypes::ENTER_ARG):
case static_cast<unsigned>(RecordTypes::EXIT):
case static_cast<unsigned>(RecordTypes::TAIL_EXIT):
R.Kind = static_cast<RecordTypes>(FunctionType);
break;
default:
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Unknown function record type '%d' at offset %d.",
FunctionType, BeginOffset);
}
R.FuncId = Buffer >> 4;
PreReadOffset = OffsetPtr;
R.Delta = E.getU32(&OffsetPtr);
if (OffsetPtr == PreReadOffset)
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Failed reading TSC delta from offset %d.",
OffsetPtr);
assert(FunctionRecord::kFunctionRecordSize == (OffsetPtr - BeginOffset));
return Error::success();
}
} // namespace xray
} // namespace llvm
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