* Remove hashbrown and use BTree{Map,Set} from the alloc crate
wasmi-validation must handle untrusted input and hence we switch from
Hash{Set,Map} (whether std's or hashbrown's) to BTree{Set,Map} to avoid
algorithmic complexity attacks while retaining no_std support.
Closes#183
* Improve memory locality of checking for duplicate exports
Using a sorted slice gives us the same O(N log N) worst case execution
time as using a BTreeMap, but using a single allocation as with HashMap,
so that we should see better memory locality and hence better constant
factors when checking for duplicate exports.
* Add some docs.
* return_type isn't failable
* Add comment about safety of top_label
* Attempt number 10
* Rework.
Now we will a compiler which wraps and uses info from a evaluation simulator.
* Get rid of outcome
* Introduce StartedWith
* Actually use started_with.
* Mirror label_stack.
* Avoid using frame_type.
* Finally get rid from frame_type.
* Extract compilation
* Refactoring cleaning
* Validation separated from compilation.
* Move sink to FunctionReader
* Rename to compiler.
* fmt
* Move push_label under validation context.
* Add Validation traits
* Express the compiler using validation trait
* Move code under prepare
* Comments.
* WIP
* The great move of validation
* Make validation compile
* Make it compile.
* Format it.
* Fix warnings.
* Clean.
* Make it work under no_std
* Move deny_floating_point to wasmi
* Rename validate_module2 → validate_module
* Make validation tests work
* Make wasmi compilation tests work
* Renamings.
* Get rid of memory_units dependency in validation
* Rename.
* Clean.
* Estimate capacity.
* fmt.
* Clean and detail End opcode.
* Add comment about top_label safety
* Remove another TODO
* Comment access to require_target
* Remove redundant PartialEq
* Print value that can't be coerced to u32
* s/with_instruction_capacity/with_capacity
* fmt.
* fmt
* Proofs
* Add better proof
* Get rid of unreachable in StackValueType
* Propagate error if frame stack overflown on create
* use checked sub instead of -
* Keep::count
Sergei Pepyakin
adam-rhebo
Sergei Pepyakin