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Split them into two i32 globals.
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Hash the contents of all of memory and log that out in random places in the fuzzer, so we are more sensitive there and can catch memory bugs.
Fix UB that was uncovered by this in the binary writing code - if a segment is empty, we should not look at &vector[0], and instead use vector.data().
Add Builder::addExport convenience method.
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Adds support for the bulk memory proposal's passive segments. Uses a
new (data passive ...) s-expression syntax to mark sections as
passive.
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If the user does not supply features explicitly on the command line,
read and use the features in the target features section for
validation and passes. If the user does supply features explicitly,
error if they are not a superset of the features marked as used in the
target features section and the user does not explicitly handle this.
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Convert PIC code generated by llvm to work with the current emscripten
ABI for dynamic linking:
- Convert mutable global imports from GOT.mem and GOT.func into
internal globals.
- Initialize these globals on started up in g$foo and f$foo imported functions
to calculate addresses at runtime.
Also:
- Add a test case for linking and finalizing a shared library
- Allow __stack_pointer global to be non-existent as can be case for
a shared library.
- Allow __stack_pointer global to be an import, as can be the case for
a shared library.
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This renames the following:
- `i32.wait` -> `i32.atomic.wait`
- `i64.wait` -> `i64.atomic.wait`
- `wake` -> `atomic.notify`
to match the spec.
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And run it in wasm-emscripten-finalize. This will prevent the emscripten output from changing when the target features section lands in LLVM.
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Fixes #1921
Signed-off-by: Bogdan Vaneev <warchantua@gmail.com>
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Bulk memory operations
The only parts missing are the interpreter implementation
and spec tests.
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WebAssembly/tool-conventions#93 has a summary of emscripten's current thinking on this. For Binaryen, we don't want to do anything to the producers section by default, but do want it to be possible to optionally remove it. To achieve that, this PR
* creates a --strip-producers pass that removes that section.
* creates a --strip-debug pass that removes debug info, same as the old --strip, which is still around but deprecated.
A followup in emscripten will use this pass by default.
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This fixes the memory leak in WasmBinaryBuilder::readSignatures() caused probably the exception thrown there before the FunctionType object is safe.
This also makes it clear that the Module becomes the owner of the FunctionType objects.
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Automated renaming according to
https://github.com/WebAssembly/spec/issues/884#issuecomment-426433329.
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Implement and test the following functionality for SIMD.
- Parsing and printing
- Assembling and disassembling
- Interpretation
- C API
- JS API
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This is sort of like --strip on a native binary. The more specific use case for us is e.g. you link with a library that has -g in its CFLAGS, but you don't want debug info in your final executable (I hit this with poppler now). We can make emcc pass this to binaryen if emcc is not building an output with intended debug info.
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Where reasonable from a readability perspective, remove default cases
in switches over types and instructions. This makes future feature
additions easier by making the compiler complain about each location
where new types and instructions are not yet handled.
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Fixes #1649
This moves us to a single object for functions, which can be imported or nor, and likewise for globals (as a result, GetGlobals do not need to check if the global is imported or not, etc.). All imported things now inherit from Importable, which has the module and base of the import, and if they are set then it is an import.
For convenient iteration, there are a few helpers like
ModuleUtils::iterDefinedGlobals(wasm, [&](Global* global) {
.. use global ..
});
as often iteration only cares about imported or defined (non-imported) things.
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From #1665 (a fuzz bug noticed they were not handled in stack.h).
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The 'dylink' user section must be emitted before all other sections, per the spec (to allow simple parsing by loaders)
This PR makes reading and writing of a dynamic library remain a valid dynamic library.
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See #1479 (comment)
Also a one-line readme update, remove an obsolete compiler (mir2wasm) and add a new one (asterius).
Also improve warning and error reporting in binaryen.js - show a stack trace when relevant (instead of node.js process.exit), and avoid atexit warning spam in debug builds.
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break to it - use that to avoid rescanning blocks for unreachability purposes (#1495)
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* rename WasmType to Type. it's in the wasm:: namespace anyhow, and without Wasm- it fits in better alongside Index, Address, Expression, Module, etc.
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* run dfe at the very end, as it may be more effective after inlining
* optimize reorder-functions
* do a final dfe in asm2wasm after all other opts
* make inlining deterministic: std::atomic<T> values are not zero-initialized
* do global post opts at the end of asm2wasm, and don't also do them in the module builder
* fix function type removing
* don't inline+optimize when preserving debug info
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The IR is indeed a tree, but not an "abstract syntax tree" since there is no language for which it is the syntax (except in the most trivial and meaningless sense).
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These are not atomic operations, but are added with the atomic operations to keep from having to define atomic versions of all the sign-extending loads (an atomic zero-extending load + signext operation can be used instead).
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* if a block has a concrete final element (or a break with a value), then even if it has an unreachable child, keep it with that concrete type. this means we no longe allow the silly case of a block with an unreachable in the middle and a concrete as the final element while the block is unreachable - after this change, the block would have the type of the final element
* if an if has a concrete element in one arm, make it have that type as a result, even if the if condition is unreachable, to parallel block
* make type rules for brs and switches simpler, ignore whether they are reachable or not. whether they are dead code should not affect how they influence other types in our IR.
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Reduce an interesting wasm to a smaller still interesting wasm. This takes an arbitrary command to run, and reduces the wasm as much as it can while keeping the behavior of that command fixed. This can be used to reduce compiler bugs in an arbitrary VM, etc.
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According to spec at https://github.com/WebAssembly/threads/blob/master/proposals/threads/Overview.md#wait-and-wake-operators
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* Added BinaryenModulePrintAsmjs (using wasm2asm) + Module#emitAsmjs JS binding
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may be unreachable
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to make this practical
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threads proposal (#1082)
Also leave a stub (but valid) visitAtomicRMW in the visitor template so that not all visitors need to implement this function yet.
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This PR adds global variable support (addGlobal, getGlobal, setGlobal), host operations (currentMemory, growMemory), a few utility functions (removeImport, removeExport, getFunctionTypeBySignature with the latter being scheduled for removal once a better alternative is in place) and it introduces an additional argument to specify the result type in BinaryenBlock (effectively breaking the C-API but retaining previous behaviour by introducing the BinaryenUndefined() type for this purpose). Additionally, it enables compilation with exception support in build-js.sh as exceptions are thrown and caught when optimizing endless loops, intentionally resulting in an unreachable opcode. Affected test cases have been updated accordingly.
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(#1017)
* Extends wasm-as, wasm-dis and s2wasm to consume debug locations.
* Exports source map from asm2wasm
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* fix type of drop, set_local, set_global, load, etc: when operand is unreachable, so is the node itself
* support binary tests properly in test/passes
* fix unreachable typing of blocks with no name and an unreachable child
* fix continue emitting in asm2wasm
* properly handle emitting of unreachable load
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binary with either side unreachable - then they are unreachable. this makes our usage of the unreachable type consistent
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* improve dce to handle more cases of nested unreachable code, in particular, when the child is unreachable in type but not an actual Unreachable node, e.g. if it's a br. in that case, we just need to verify that the br is not to us where we are a block or loop
* handle unreachable switch conditions in dce
* handle dce of br condition which is unreachable, and host arguments
* handle dce of block i32 etc. which is actually unreachable
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wasm-merge tool: combines two wasm files into a larger one, handling collisions, and aware of the dynamic linking conventions. it does not do full static linking, but may eventually.
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