94335f94d7
A non-failable integer `main :: () -> T` must exit with its return value truncated to u8 (matching C main / the OS exit-status byte), so `sx run` (JIT) and an AOT binary agree. runJITMain clamped instead: any value outside 0..255 returned exit 1, so `return 1105` exited 1 (not 81), `return -1` exited 1 (not 255), and `return 256` exited 1 (not 0). Fix: bit-cast the i32 return to u32 and @truncate to u8 — negatives wrap as their two's-complement low byte rather than being clamped. The AOT path already gets OS truncation, so it was already correct; this makes JIT match. examples/238-main-exit-truncation.sx returns 1105 -> exit 81. Values <=255 (42, 200) still pass through unchanged. Gates: zig build, zig build test, bash tests/run_examples.sh (275 passed; the lone failure is the user's uncommitted 213-canonical-map pack WIP).
15 lines
601 B
Plaintext
15 lines
601 B
Plaintext
// Entry-point exit-code truncation (ERR step E4.2, non-failable integer main).
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// `main :: () -> T` (integer) exits with the return value truncated to u8 —
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// matching C `main` / the OS exit-status byte, so the JIT (`sx run`) and an AOT
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// binary agree. Here 1105 & 0xFF == 81, so this program exits 81 (NOT 1, which
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// was the old buggy "out of 0..255 range -> failure" behavior).
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//
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// Run: ./zig-out/bin/sx run examples/238-main-exit-truncation.sx ; echo $? # 81
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#import "modules/std.sx";
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main :: () -> s32 {
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print("returning 1105 -> exit {}\n", 1105 & 0xFF); // 81
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return 1105;
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}
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