Currently, if a predicate is hard to match on the Rust side, a sizable
query against a very large file can take forever, and ends up hanging.
This commit adds an API function `ts_query_cursor_set_timeout_micros` to
limit how long query execution is allowed to take, thereby negating the
chance of a hang to occur.
* In WASM, use a custom, simple malloc implementation that lets us
expicitly reset the heap with a new start location.
* When a WASM call traps or errors, propagate that as a parse failure.
* Reset the WASM heap after every parse.
Co-authored-by: Conrad <conrad@zed.dev>
Replace non-mutating `ts_parser_wasm_store` function with
`ts_parser_take_wasm_store`, which removes and returns the wasm
store, in order to facilitate single ownership.
DISCUSSION:
When compiling with `-Os` for "smallest, fastest", an error is reported in `parser.c`:
```
/Users/siegel/git/tree-sitter/lib/src/./parser.c:1368:10: error: unused variable 'did_merge' [-Werror,-Wunused-variable]
bool did_merge = ts_stack_merge(self->stack, version, previous_version_count);
^
1 error generated.
```
This is because with `NDEBUG` set, `assert(e)` collapses to `(void)0`,
which in turn means that `did_merge` does not actually get consumed.
This seems to get caught when compiling with `-Os`, but not otherwise.
Compiler version:
```
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin21.3.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
```
Fixes
```
warning: In file included from src\lib.c:12:
warning: src/./parser.c:1781:28: warning: 'fdopen' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fdopen. See online help for details. [-Wdeprecated-declarations]
warning: self->dot_graph_file = fdopen(fd, "a");
warning: ^
warning: C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt\stdio.h:2431:28: note: 'fdopen' has been explicitly marked deprecated here
warning: _Check_return_ _CRT_NONSTDC_DEPRECATE(_fdopen) _ACRTIMP FILE* __cdecl fdopen(_In_ int _FileHandle, _In_z_ char const* _Format);
warning: ^
warning: C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt\corecrt.h:414:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
warning: #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT( \
warning: ^
warning: C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\VC\Tools\MSVC\14.29.30133\include\vcruntime.h:310:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
warning: #define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
```
