In the VM's Kernel representation, introduce wrapper classes for
string and name indexes so it is obvious which one is which. For
convenience there is an implicit conversion so that they can each be
used where an int is allowed. However, there is no implicit
conversion _to_ either of these types.
BUG=
R=vegorov@google.com
Review-Url: https://codereview.chromium.org/2860823002 .
The canonical name table is copied into a typed data array in the VM's
heap. The encoding is the same as in the binary except that the
integer indexes are fixed-size.
Canonical names are now integer indexes instead of objects allocated
in the C++ heap.
BUG=
R=jensj@google.com, vegorov@google.com
Review-Url: https://codereview.chromium.org/2853423002 .
Copy the Kernel string offsets into a uint32 array in the VM's heap.
This avoids allocating small string objects with new and avoids having
a table of the canonical strings.
Instead of an offset and a size, strings are now represented as
indexes into the string table in the heap. The start offset of string
N is found at byte offset N*4 because it is a uint32, and the end
offset is found at byte offset (N+1)*4. The strings themselves are
just integer indexes instead of pointers.
In the stream flow graph builder, string access is all random access.
R=jensj@google.com, vegorov@google.com
Review-Url: https://codereview.chromium.org/2852943003 .
1. A --platform flag is added to dart to give a path to a Kernel
binary for the platform libraries (as produced by building the
runtime_kernel target).
2. This binary is used for bootstrapping. Since it contains libraries
other then the VM's bootstrap libraries, they are also loaded.
3. The frontend does not send any library with a dart: import URI
scheme. Note that it does not (yet) prune the canonical name
table, which will contain a lot of unnecessary names used for
internal linkages in the platform libraries.
4. There is a single dependency in the platform libraries on the
script: _getMainClosure in dart:_builtin. This is patched after
the script is loaded.
BUG=
R=ahe@google.com, kustermann@google.com, vegorov@google.com
Review-Url: https://codereview.chromium.org/2786083002 .
- Instead of a pointer to new'd memory, Kernel strings now have an
offset from the start of the string data.
- When the streaming reader encounters the string data it records the
offset from the start of the binary. This offset is stored in the
Kernel Program and is used to compute the offset for strings.
- When a KernelReader is constructed, the string data is copied into a
Uint8 array in the VM's heap.
- A pointer to the string data is put into every Kernel script so it
can be used for constructing VM strings at compile time.
The source table does not use Kernel strings any more because those
strings are not found in the raw string data. Instead, the source
table uses new'd buffers for strings (but this will be cleaned up
separately).
R=jensj@google.com
Review-Url: https://codereview.chromium.org/2820363002 .
For compiling the platform libraries separately and for hot reload, we
will not link canonical names of Kernel libraries, classes, and
members to their Kernel definitions. Those definitions will not be
persistent.
As a first step, change name-based lookup of libraries and classes to
be be based on the canonical name instead of the Kernel definition.
BUG=
R=kustermann@google.com
Review-Url: https://codereview.chromium.org/2762213002 .
The CL adds metadata support for Fields/Classes/Functions/Constructors. There
are other places where annotations can be put in the Dart language but the
Kernel IR currently does not store it in the AST.
Whenever a element (e.g. a function) gets annotated, the VM will make a [Field] for this
element whos value is an array of evaluated constant metadata annotations.
This CL attaches to these [Fields] a `kernel_function` which is then used to do the constant
evaluation.
R=vegorov@google.com
Review-Url: https://codereview.chromium.org/2632253002 .
- The flow graph builder is only used to visit Statements and
Expressions so it does not need TreeVisitor as a base class. This
will make refactoring it easier.
- The TranslationHelper is bound to a Thread so we do not need
Thread::Current where we have a TranslationHelper.
- BlockExpression does not exist in Kernel any more, so it can be
removed from the C++ AST implementation.
BUG=
R=kustermann@google.com
Review-Url: https://codereview.chromium.org/2624513005 .
- For now include source uncompressed.
- When running from kernel, use token position 0
(i.e. dummy, but 'real' position) as start and end on functions
and classes to enable Observatory to run with the dill file.
- Debugging does not work, but one can browse the source in
Observatory.
R=kmillikin@google.com
Review-Url: https://codereview.chromium.org/2587673004 .
Fix a trio of issues in type finalization.
1. We were using is_type_finalized to detect classes that had already been
initialized by DilReader::ReadPreliminaryClass. This state is not
guaranteed by this function, however is_cycle_free is.
2. In the VM, classes that were created type finalized were not marked as
cycle free because finalization did not consider them so cycle-freeness
didn't matter. We would therefore try to initialize these classes with
DilReader::ReadPreliminaryClass and mutate types in them. This causes
them to have unfinalized types but still have is_type_finalized true.
3. Types in top-level procedures were not necessarily finalized. A simple
way to achieve this is to finalize each library's top-level class.
Review URL: https://chromereviews.googleplex.com/520437013 .
R=kmillikin@google.com
Review URL: https://codereview.chromium.org/2514373002 .
i.e. #ifndef VM_WHATEVER -> #ifndef RUNTIME_VM_WHATEVER
This lets us remove a hack from the PRESUBMIT.py script that existed
for reasons that are no longer valid, and sets us up to add some
presubmit checks for the GN build.
R=asiva@google.com, rmacnak@google.com
Review URL: https://codereview.chromium.org/2450713004 .
Kevin Millikin