test/lit/exec/start.wast

;; NOTE: Assertions have been generated by update_lit_checks.py --output=fuzz-exec and should not be edited.

;; RUN: foreach %s %t wasm-opt -all --fuzz-exec-before | filecheck %s

;; $start runs before the first export, so we print 1 here.
(module
  (global $global (mut i32) (i32.const 0))

  (start $start)

  (func $start
    (global.set $global
      (i32.const 1)
    )
  )

  ;; CHECK:      [fuzz-exec] export run
  ;; CHECK-NEXT: [fuzz-exec] note result: run => 1
  ;; CHECK-NEXT: [trap unreachable]
  ;; CHECK-NEXT: [exception thrown: start]
  (func $run (export "run") (result i32)
    ;; Due to limitations of the auto-updater, the trap and exception from the
    ;; following two modules gets logged here. (There is at least no
    ;; ambiguity: we first see that we finished ok and returned a value.)
    (global.get $global)
  )
)

;; A trapping start prevents any export from running.
(module
  (start $trap)

  (func $trap
    (unreachable)
  )

  (func $run (export "run") (result i32)
    (i32.const 42)
  )
)

;; A throwing start prevents any export from running.
(module
  (tag $tag)

  (start $throw)

  (func $throw
    (throw $tag)
  )

  (func $run (export "run") (result i32)
    (i32.const 42)
  )
)