Bug fixes #6
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Bug fixes #6
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… overflow - Fix argument register clobbering in function calls by evaluating all args to stack temporaries before loading registers - Fix LEFT$/RIGHT$/MID$ builtins to use callee-saved registers (r12-r14) - Support >6 parameters in SUB/FUNCTION via stack-based overflow args - Add GOSUB stack overflow protection with runtime error handler - Increase GOSUB stack from 1K to 64K entries (512KB) - Add expression nesting depth warning at 256 levels - Use consistent sub rsp/add rsp pattern for string concatenation temps - Add integration tests for all fixes Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Combine related test cases into single BASIC programs with multi-line output validation to reduce compile-link cycles. Also fix clippy warnings about approximate PI values in lexer tests. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Pull request overview
This PR consolidates test suites and implements bug fixes for GOSUB stack overflow handling, procedure parameter overflow (>6 params), and string function argument evaluation. The changes reduce test file verbosity by combining related tests while maintaining comprehensive coverage.
Changes:
- Consolidated 11 test modules by combining multiple small tests into larger, more efficient test functions
- Added GOSUB stack overflow detection with error handling and increased stack size from 8KB to 512KB
- Fixed parameter passing for procedures with more than 6 arguments (register overflow to stack)
- Fixed string function (LEFT$, RIGHT$, MID$) argument evaluation using callee-saved registers to prevent register clobbering
Reviewed changes
Copilot reviewed 17 out of 17 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| tests/variables/mod.rs | Consolidated 7 variable tests into 2 comprehensive tests |
| tests/types/mod.rs | Consolidated 53 type promotion/conversion tests into 6 focused tests |
| tests/strings/mod.rs | Consolidated 6 string function tests into 3 tests with nested calls |
| tests/procedures/mod.rs | Consolidated 3 procedure tests into 4 tests including stress tests |
| tests/print/mod.rs | Consolidated 3 print tests into 1 combined test |
| tests/math/mod.rs | Consolidated 59 math function tests into 10 type-focused tests |
| tests/input/mod.rs | Consolidated 2 input tests into 1 test |
| tests/data/mod.rs | Consolidated 2 DATA/READ tests into 1 test |
| tests/control/mod.rs | Consolidated 17 control flow tests into 7 tests plus GOSUB stress test |
| tests/arrays/mod.rs | Consolidated 3 array tests into 1 test covering 1D and 2D arrays |
| tests/arithmetic/mod.rs | Consolidated 41 arithmetic tests into 8 operator-focused tests |
| src/runtime/win64-native/print.s | Added _rt_gosub_overflow error handler for Win64 |
| src/runtime/win64-native/data_defs.s | Added GOSUB overflow error message |
| src/runtime/sysv/print.s | Added _rt_gosub_overflow error handler for SysV |
| src/runtime/sysv/data_defs.s | Added GOSUB overflow error message |
| src/lexer.rs | Updated test float literals from 3.14159 to avoid precision issues |
| src/codegen.rs | Fixed GOSUB overflow detection, parameter overflow handling, string function register preservation, and expression depth tracking |
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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