31 lines
1.1 KiB
Plaintext
31 lines
1.1 KiB
Plaintext
// A protocol method declared `-> *void` (literal void-pointer return,
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// NOT `Self`) returns the underlying impl's pointer to the caller
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// unchanged. The dispatch path must NOT auto-load from the result —
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// `*void` outside a `Self`-disguise is a real pointer whose pointee
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// size is unknown.
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//
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// Regression: target_type leaks from the surrounding scope (e.g. the
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// enclosing function's return type). The dispatcher used to auto-load
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// `sizeof(target_type)` bytes from every `*void` return, mistaking
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// real pointers for Self-encoded boxes. Result was that
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// `alloc.alloc_bytes(64)` through an Allocator protocol value returned the
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// first 4 bytes of malloc'd memory interpreted as `s32` (= 0 → null).
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#import "modules/std.sx";
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#import "modules/std/mem.sx";
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main :: () -> s32 {
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gpa := GPA.init();
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alloc : Allocator = xx gpa;
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p_direct := gpa.alloc_bytes(64);
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print("direct: null? {}\n", p_direct == null);
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p_protocol := alloc.alloc_bytes(64);
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print("protocol: null? {}\n", p_protocol == null);
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print("alloc_count: {}\n", gpa.alloc_count);
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0
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}
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