We now check all of the scripts which make up a library. If any
script is modified, then we consider that library to be modified. We
also consider any library which imports a modified library to be
modified. To propagate this info efficiently, we build and discard
the imported-by graph when beginning a reload.
The embedder must provide a FileModifiedCallback in order to support
the detection of modified scripts.
In order to detect changes to package: libraries, we have modified the
embedder interface to provide the resolved url when possible, so that
we don't need to re-resolve package uris when checking for reload.
This change is incompatible and all embedders will need to be updated.
We now support a "force" flag when reloading sources. This causes all
libraries to be reloaded regardless of whether the underlying scripts
have been updated.
Closes#26919R=johnmccutchan@google.com
Review URL: https://codereview.chromium.org/2186423002 .
This cl implements an experimental filesystem maintained in the vm, called dart-devfs. This will allow service protocol users to read and write source files while the vm is running. This is needed for the reload support for flutter.
R=turnidge@google.com
Review URL: https://codereview.chromium.org/2059883003 .
Adds Dart_DefaultCanonicalizeUrl() to the dart embedding api.
Motivation:
As we try to get source reloading working for the standalone embedder, things get simpler if an isolate doesn't run Dart code while it is loading Dart code. We intend to solve this by moving the embedder tag handler calls to the service isolate. But making a blocking rpc into the service isolate whenever a url needs to be canonicalized during parsing seems like it would slow things down and make things complicated. By moving canonicalization into C++, we avoid this.
R=ahe@google.com, fschneider@google.com, johnmccutchan@google.com
Review URL: https://codereview.chromium.org/2011543002 .
This is a cut of the work that Todd and I collaborated on in the reload branch.
In this CL, we've dropped the loader port hacks, in other words, on stack reloading in the standalone embedder does not work yet.
- [x] Support for hot reloading of isolate source code
- [x] Unit test harness and many tests
- [x] Service protocol and Observatory support
- [x] Product build does not include support for hot reloading.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1965823002 .
- Full snapshots must be written and read by VMs in the same
mode (debug/release/product).
- Snapshots with ICData must be written and read by VMs in same
checked-mode state.
- Snapshots with code must be written and read by VMs targeting the
same architecture and ABI.
Fix use-after-free of VM isolate snapshot error message.
R=asiva@google.com
Review URL: https://codereview.chromium.org/1975423002 .
- [x] Add _getThreadCpuClock to dart:developer.
- [x] Report CPU usage for Dart synchronous timeline blocks.
- [x] GetEnvironmentValue for 'dart.vm.product' will return "true" or "false" depending on whether or not we are running in product mode.
- [x] Early out of Dart timeline calls if we are running in product mode.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1966833002 .
- Don't create rival copies of the predefined symbols in isolates in dart_bootstrap.
- Don't do work to save these rival copies during symbol table compaction.
- Create unified symbol table just before writing the vm isolate.
- Create unified list of scripts to include in the vm isolate.
- Ignore object ids of the old vm isolate when writing a new one.
- Ensure token stream private keys are hashed.
- Use the type of isolate we are writing instead of an object's current isolate to decide if vm isolate objects are written symbolically.
BUG=
R=asiva@google.com
Review URL: https://codereview.chromium.org/1944213002 .
- Ensure the uniqueness of private keys without having to
search the existing key space.
- Pass a thread parameter where useful to library methods.
BUG=
Review URL: https://codereview.chromium.org/1947393003 .
The slow string comparison is only necessary when looking up
non-symbols or untangled private names.
Compiling all of dart2js seems to be about 1% faster, but it's really in the noise.
BUG=
R=asiva@google.com
Review URL: https://codereview.chromium.org/1868803002 .
This removes the additional indirection to the VM's implementation
for all the factory constructors.
Additionally, it removes one class per typed data list type, thus reducing
snapshot and generated code size.
BUG=
R=asiva@google.com
Review URL: https://codereview.chromium.org/1790593002 .
API changes:
- Remove isolate specific Timeline APIs.
- Remove Dart_EmbedderTimelineGetTimeline callback.
- Add Dart_TimelineEvent so that arbitrary trace events can be added.
Internal changes:
- Remove isolate specific streams which were never used or controllable from outside the VM.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1811613002 .
Adam Barth