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Test that exporting random globals does not change memory semantics #1753

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Jun 13, 2024
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Test that exporting random globals does not change memory semantics #1753

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25 changes: 25 additions & 0 deletions test/core/memory.wast
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Original file line number Diff line number Diff line change
Expand Up @@ -240,3 +240,28 @@
"(import \"\" \"\" (memory $foo 1))"
"(import \"\" \"\" (memory $foo 1))")
"duplicate memory")

;; Test that exporting random globals does not change a memory's semantics.

(module
(memory (export "memory") 1 1)

;; These should not change the behavior of memory accesses.
(global (export "__data_end") i32 (i32.const 10000))
(global (export "__stack_top") i32 (i32.const 10000))
(global (export "__heap_base") i32 (i32.const 10000))

(func (export "load") (param i32) (result i32)
(i32.load8_u (local.get 0))
)
)

;; None of these memory accesses should trap.
(assert_return (invoke "load" (i32.const 0)) (i32.const 0))
(assert_return (invoke "load" (i32.const 10000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 20000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 30000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 40000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 50000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 60000)) (i32.const 0))
(assert_return (invoke "load" (i32.const 65535)) (i32.const 0))