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License: Apache License 2.0
An experimental Racket implementation using LLVM/MLIR
License: Apache License 2.0
We have defined ToTopLevelNode and ToExprNode structs with operator()
to upcast variants. I am sure there's a way to simplify this in C++.
This should be a NFC enhancement.
We need a Writer class that writes Racket values, as opposed to the dumper who is supposed to dump ASTNodes.
An example where these differs is values.
The Writer should write (values 1 2) as
1
2
while the Dumper should dump it as
(values 1 2)
The current nodes that should be part of runtime should be removed and added to the environment during a prepareRuntime method executed at Interpreter construction time.
We are using plog for logging but possibly better is to use llvm::dbgs facility.
Setup codecov for the project.
We already do this manually in interpreter.cpp at least once and more situations like these will happen.
Should save the SARIF file and add it to the security tab.
Also add a PR workflow that warns the user in the PR if the patch has a problem.
LLVM provides dyn_cast for downcasts. We should use those goodies from the LLVM lib.
Search for static_cast, and there are mostly the places where dyn_cast can be used.
The following test crashes nora:
;; RUN: norac %s | FileCheck %s
;; CHECK: 12
(linklet () ()
(define-values (fn) (values 0))
(let-values (((x) (values 2)))
(set! fn (lambda (y) (+ x y))))
(let-values (((x) (values 3)))
(fn 10)))
There's a warning from ubsan as well:
Cannot set undefined identifier.
Expected lambda expression in Application.
/home/pmatos/dev/nora/src/include/interpreter.h:43:52: runtime error: member call on null pointer of type 'ast::ValueNode'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/pmatos/dev/nora/src/include/interpreter.h:43:52 in
UndefinedBehaviorSanitizer:DEADLYSIGNAL
==23846==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000000 (pc 0x56310e36d3d7 bp 0x7ffebfb63690 sp 0x7ffebfb63650 T23846)
==23846==The signal is caused by a READ memory access.
==23846==Hint: address points to the zero page.
#0 0x56310e36d3d7 in Interpreter::getResult() const /home/pmatos/dev/nora/src/include/interpreter.h:43:52
#1 0x56310e36cae7 in main /home/pmatos/dev/nora/src/main.cpp:53:26
#2 0x7f2ef4c3c78f (/usr/lib/libc.so.6+0x2378f) (BuildId: 4a4bec3d95a1804443e852958fe59ed461135ce9)
#3 0x7f2ef4c3c849 in __libc_start_main (/usr/lib/libc.so.6+0x23849) (BuildId: 4a4bec3d95a1804443e852958fe59ed461135ce9)
#4 0x56310e33aa74 in _start (/home/pmatos/dev/nora/build/bin/norac+0x164a74) (BuildId: ff1360b6f90819159bf3d99f7e8a9ddb2f700ae2)
UndefinedBehaviorSanitizer can not provide additional info.
SUMMARY: UndefinedBehaviorSanitizer: SEGV /home/pmatos/dev/nora/src/include/interpreter.h:43:52 in Interpreter::getResult() const
==23846==ABORTING
I also think that even once this is fixed nora will print 13, rather than 12.
GCC can't compile nora atm. However, since we track MLIR very close to HEAD of LLVM it might be that this is not realistic. Support for C++20 might be different etc. So I am putting this here but won't look into it in the near future.
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