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elem.wast
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;; Test the element section
;; Syntax
(module
(table $t 10 funcref)
(func $f)
(elem (i32.const 0))
(elem (i32.const 0) $f $f)
(elem (offset (i32.const 0)))
(elem (offset (i32.const 0)) $f $f)
(elem 0 (i32.const 0))
(elem 0x0 (i32.const 0) $f $f)
(elem 0x000 (offset (i32.const 0)))
(elem 0 (offset (i32.const 0)) $f $f)
(elem $t (i32.const 0))
(elem $t (i32.const 0) $f $f)
(elem $t (offset (i32.const 0)))
(elem $t (offset (i32.const 0)) $f $f)
)
;; Basic use
(module
(table 10 funcref)
(func $f)
(elem (i32.const 0) $f)
)
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const 0) $f)
)
(module
(table 10 funcref)
(func $f)
(elem (i32.const 0) $f)
(elem (i32.const 3) $f)
(elem (i32.const 7) $f)
(elem (i32.const 5) $f)
(elem (i32.const 3) $f)
)
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const 9) $f)
(elem (i32.const 3) $f)
(elem (i32.const 7) $f)
(elem (i32.const 3) $f)
(elem (i32.const 5) $f)
)
(module
(global (import "spectest" "global_i32") i32)
(table 1000 funcref)
(func $f)
(elem (global.get 0) $f)
)
(module
(global $g (import "spectest" "global_i32") i32)
(table 1000 funcref)
(func $f)
(elem (global.get $g) $f)
)
(module
(type $out-i32 (func (result i32)))
(table 10 funcref)
(elem (i32.const 7) $const-i32-a)
(elem (i32.const 9) $const-i32-b)
(func $const-i32-a (type $out-i32) (i32.const 65))
(func $const-i32-b (type $out-i32) (i32.const 66))
(func (export "call-7") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 7))
)
(func (export "call-9") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 9))
)
)
(assert_return (invoke "call-7") (i32.const 65))
(assert_return (invoke "call-9") (i32.const 66))
;; Corner cases
(module
(table 10 funcref)
(func $f)
(elem (i32.const 9) $f)
)
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const 9) $f)
)
(module
(table 0 funcref)
(elem (i32.const 0))
)
(module
(import "spectest" "table" (table 0 funcref))
(elem (i32.const 0))
)
(module
(table 0 0 funcref)
(elem (i32.const 0))
)
(module
(table 20 funcref)
(elem (i32.const 20))
)
(module
(import "spectest" "table" (table 0 funcref))
(func $f)
(elem (i32.const 0) $f)
)
(module
(import "spectest" "table" (table 0 100 funcref))
(func $f)
(elem (i32.const 0) $f)
)
(module
(import "spectest" "table" (table 0 funcref))
(func $f)
(elem (i32.const 1) $f)
)
(module
(import "spectest" "table" (table 0 30 funcref))
(func $f)
(elem (i32.const 1) $f)
)
;; Invalid bounds for elements
(assert_unlinkable
(module
(table 0 funcref)
(func $f)
(elem (i32.const 0) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 0 0 funcref)
(func $f)
(elem (i32.const 0) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 0 1 funcref)
(func $f)
(elem (i32.const 0) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 0 funcref)
(elem (i32.const 1))
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 10 funcref)
(func $f)
(elem (i32.const 10) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const 10) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 10 20 funcref)
(func $f)
(elem (i32.const 10) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const 10) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 10 funcref)
(func $f)
(elem (i32.const -1) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const -1) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(table 10 funcref)
(func $f)
(elem (i32.const -10) $f)
)
"elements segment does not fit"
)
(assert_unlinkable
(module
(import "spectest" "table" (table 10 funcref))
(func $f)
(elem (i32.const -10) $f)
)
"elements segment does not fit"
)
;; Element without table
(assert_invalid
(module
(func $f)
(elem (i32.const 0) $f)
)
"unknown table"
)
;; Invalid offsets
(assert_invalid
(module
(table 1 funcref)
(elem (i64.const 0))
)
"type mismatch"
)
(assert_malformed
(module
(table 1 funcref)
(elem (offset (;empty instruction sequence;)))
)
"constant expression required"
)
(assert_malformed
(module
(table 1 funcref)
(elem (offset (i32.const 0) (i32.const 0)))
)
"unexpected end"
)
(assert_malformed
(module
(global (import "test" "global-i32") i32)
(table 1 funcref)
(elem (offset (global.get 0) (global.get 0)))
)
"unexpected end"
)
(assert_malformed
(module
(global (import "test" "global-i32") i32)
(table 1 funcref)
(elem (offset (global.get 0) (i32.const 0)))
)
"unexpected end"
)
(assert_malformed
(module
(table 1 funcref)
(elem (i32.ctz (i32.const 0)))
)
"unexpected end"
)
(assert_malformed
(module
(table 1 funcref)
(elem (nop))
)
"constant expression required"
)
(assert_malformed
(module
(table 1 funcref)
(elem (offset (nop) (i32.const 0)))
)
"constant expression required"
)
(assert_malformed
(module
(table 1 funcref)
(elem (offset (i32.const 0) (nop)))
)
"unexpected end"
)
;; Use of internal globals in constant expressions is not allowed in MVP.
;; (assert_invalid
;; (module (memory 1) (data (global.get $g)) (global $g (mut i32) (i32.const 0)))
;; "constant expression required"
;; )
(assert_invalid
(module
(table 1 funcref)
(elem (global.get 0))
)
"unknown global 0"
)
(assert_invalid
(module
(global (import "test" "global-i32") i32)
(table 1 funcref)
(elem (global.get 1))
)
"unknown global 1"
)
;; Two elements target the same slot
(module
(type $out-i32 (func (result i32)))
(table 10 funcref)
(elem (i32.const 9) $const-i32-a)
(elem (i32.const 9) $const-i32-b)
(func $const-i32-a (type $out-i32) (i32.const 65))
(func $const-i32-b (type $out-i32) (i32.const 66))
(func (export "call-overwritten") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 9))
)
)
(assert_return (invoke "call-overwritten") (i32.const 66))
(module
(type $out-i32 (func (result i32)))
(import "spectest" "table" (table 10 funcref))
(elem (i32.const 9) $const-i32-a)
(elem (i32.const 9) $const-i32-b)
(func $const-i32-a (type $out-i32) (i32.const 65))
(func $const-i32-b (type $out-i32) (i32.const 66))
(func (export "call-overwritten-element") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 9))
)
)
(assert_return (invoke "call-overwritten-element") (i32.const 66))
;; Element sections across multiple modules change the same table
(module $module1
(type $out-i32 (func (result i32)))
(table (export "shared-table") 10 funcref)
(elem (i32.const 8) $const-i32-a)
(elem (i32.const 9) $const-i32-b)
(func $const-i32-a (type $out-i32) (i32.const 65))
(func $const-i32-b (type $out-i32) (i32.const 66))
(func (export "call-7") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 7))
)
(func (export "call-8") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 8))
)
(func (export "call-9") (type $out-i32)
(call_indirect (type $out-i32) (i32.const 9))
)
)
(register "module1" $module1)
(assert_trap (invoke $module1 "call-7") "uninitialized element")
(assert_return (invoke $module1 "call-8") (i32.const 65))
(assert_return (invoke $module1 "call-9") (i32.const 66))
(module $module2
(type $out-i32 (func (result i32)))
(import "module1" "shared-table" (table 10 funcref))
(elem (i32.const 7) $const-i32-c)
(elem (i32.const 8) $const-i32-d)
(func $const-i32-c (type $out-i32) (i32.const 67))
(func $const-i32-d (type $out-i32) (i32.const 68))
)
(assert_return (invoke $module1 "call-7") (i32.const 67))
(assert_return (invoke $module1 "call-8") (i32.const 68))
(assert_return (invoke $module1 "call-9") (i32.const 66))
(module $module3
(type $out-i32 (func (result i32)))
(import "module1" "shared-table" (table 10 funcref))
(elem (i32.const 8) $const-i32-e)
(elem (i32.const 9) $const-i32-f)
(func $const-i32-e (type $out-i32) (i32.const 69))
(func $const-i32-f (type $out-i32) (i32.const 70))
)
(assert_return (invoke $module1 "call-7") (i32.const 67))
(assert_return (invoke $module1 "call-8") (i32.const 69))
(assert_return (invoke $module1 "call-9") (i32.const 70))