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 ne

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

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[XRay] Use TSC delta encoding for custom/typed events

Summary:
This change updates the version number for FDR logs to 5, and update the
trace processing to support changes in the custom event record

[XRay] Use TSC delta encoding for custom/typed events

Summary:
This change updates the version number for FDR logs to 5, and update the
trace processing to support changes in the custom event records.

In the runtime, since we're already writing down the record preamble to
handle CPU migrations and TSC wraparound, we can use the same TSC delta
encoding in the custom event and typed event records that we use in
function event records. We do the same change to typed events (which
were unsupported before this change in the trace processing) which now
show up in the trace.

Future changes should increase our testing coverage to make custom and
typed events as first class entities in the FDR mode log processing
tools.

This change is also a good example of how we end up supporting new
record types in the FDR mode implementation. This shows the places where
new record types are added and supported.

Depends on D54139.

Reviewers: mboerger

Subscribers: hiraditya, arphaman, jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D54140

llvm-svn: 346293

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[XRay] Update XRayRecord to support Custom/Typed Events

Summary:
This change cuts across LLVM and compiler-rt to add support for
rendering custom events in the XRayRecord type, to allow for includin

[XRay] Update XRayRecord to support Custom/Typed Events

Summary:
This change cuts across LLVM and compiler-rt to add support for
rendering custom events in the XRayRecord type, to allow for including
user-provided annotations in the output YAML (as raw bytes).

This work enables us to add custom event and typed event records into
the `llvm::xray::Trace` type for user-provided events. This can then be
programmatically handled through the C++ API and can be included in some
of the tooling as well. For now we support printing the raw data we
encounter in the custom events in the converted output.

Future work will allow us to start interpreting these custom and typed
events through a yet-to-be-defined API for extending the trace analysis
library.

Reviewers: mboerger

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D54139

llvm-svn: 346214

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[XRay] Update delta computations in runtime

Summary:
Fix some issues discovered from mostly manual inspection of outputs from
the `llvm-xray fdr-dump` tool.

It turns out we haven't been writing the

[XRay] Update delta computations in runtime

Summary:
Fix some issues discovered from mostly manual inspection of outputs from
the `llvm-xray fdr-dump` tool.

It turns out we haven't been writing the deltas properly, and have been
writing down zeros for deltas of some records. This change fixes this
oversight born by the recent refactoring.

Reviewers: mboerger

Subscribers: llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D54022

llvm-svn: 345954

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[XRay] Add CPU ID in Custom Event FDR Records

Summary:
This change cuts across compiler-rt and llvm, to increment the FDR log
version number to 4, and include the CPU ID in the custom event records.

[XRay] Add CPU ID in Custom Event FDR Records

Summary:
This change cuts across compiler-rt and llvm, to increment the FDR log
version number to 4, and include the CPU ID in the custom event records.

This is a step towards allowing us to change the `llvm::xray::Trace`
object to start representing both custom and typed events in the stream
of records. Follow-on changes will allow us to change the kinds of
records we're presenting in the stream of traces, to incorporate the
data in custom/typed events.

A follow-on change will handle the typed event case, where it may not
fit within the 15-byte buffer for metadata records.

This work is part of the larger effort to enable writing analysis and
processing tools using a common in-memory representation of the events
found in traces. The work will focus on porting existing tools in LLVM
to use the common representation and informing the design of a
library/framework for expressing trace event analysis as C++ programs.

Reviewers: mboerger, eizan

Subscribers: hiraditya, mgrang, llvm-commits

Differential Revision: https://reviews.llvm.org/D53920

llvm-svn: 345798

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[XRay] Add TSC to NewCPUId Records

Summary:
This more correctly reflects the data written by the FDR mode runtime.

This is a continuation of the work in D50441.

Reviewers: mboerger, eizan

Subscri

[XRay] Add TSC to NewCPUId Records

Summary:
This more correctly reflects the data written by the FDR mode runtime.

This is a continuation of the work in D50441.

Reviewers: mboerger, eizan

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D51911

llvm-svn: 341905

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[XRay] Add a RecordPrinter visitor for FDR Records

Summary:
This change adds a `RecordPrinter` type which does some basic text
serialization of the FDR record instances. This is one component of the

[XRay] Add a RecordPrinter visitor for FDR Records

Summary:
This change adds a `RecordPrinter` type which does some basic text
serialization of the FDR record instances. This is one component of the
tool we're building to dump the records from an FDR mode log as-is.

This is a small part of D50441.

Reviewers: eizan, kpw

Subscribers: mgorny, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D51672

llvm-svn: 341447

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