test_debug.py

import subprocess

wast_content = """
(module $Mem
  (memory (export "shared") 1 1 shared)
)
(register "mem")

(thread $T1 (shared (module $Mem))
  (register "mem" $Mem)
  (module
    (memory (import "mem" "shared") 1 1 shared)
    (func (export "run")
      (local i32)
      (i32.atomic.store (i32.const 0) (i32.const 1))
      (i32.atomic.load (i32.const 4))
      (local.set 0)
      (i32.store (i32.const 24) (local.get 0))
    )
  )
  (invoke "run")
)

(thread $T2 (shared (module $Mem))
  (register "mem" $Mem)
  (module
    (memory (import "mem" "shared") 1 1 shared)
    (func (export "run")
      (local i32)
      (i32.atomic.store (i32.const 4) (i32.const 1))
      (i32.atomic.load (i32.const 0))
      (local.set 0)
      (i32.store (i32.const 32) (local.get 0))
    )
  )
  (invoke "run")
)

(wait $T1)
(wait $T2)

(module $Check
  (memory (import "mem" "shared") 1 1 shared)
  (func (export "check") (result i32 i32)
    (i32.load (i32.const 32)) ;; Load L_1 first so it fails at index 0
    (i32.load (i32.const 24))
  )
)

(assert_return (invoke $Check "check") (i32.const 999) (i32.const 999))
"""

with open("debug_sb.wast", "w") as f:
    f.write(wast_content)

r = subprocess.run(["./bin/wasm-shell", "debug_sb.wast"], capture_output=True, text=True)
print("STDOUT:", r.stdout)
print("STDERR:", r.stderr)