Module traphandlers

WebAssembly trap handling, which is built on top of the lower-level signalhandling mechanisms.

Structs

• TrapHandlerContext 🔒
  Read-only information that is used by signal handlers to handle and recover from traps.
• TrapHandlerContextInner 🔒
• VMConfig
  Configuration for the runtime VM Currently only the stack size is configurable

Enums

• UnwindReason 🔒

Constants

• TRAP_HANDLER 🔒
• YIELDER 🔒

Statics

• DEFAULT_STACK_SIZE 🔒
• MAGIC 🔒
• PREV_SIGBUS 🔒
• PREV_SIGFPE 🔒
• PREV_SIGILL 🔒
• PREV_SIGSEGV 🔒

Functions

• catch_traps^⚠
  Catches any wasm traps that happen within the execution of closure, returning them as a Result.
• get_pc_sp 🔒 ^⚠
• init_traps
  This function is required to be called before any WebAssembly is entered. This will configure global state such as signal handlers to prepare the process to receive wasm traps.
• lazy_per_thread_init
  A module for registering a custom alternate signal stack (sigaltstack).
• on_host_stack
  When executing on the Wasm stack, temporarily switch back to the host stack to perform an operation that should not be constrainted by the Wasm stack limits.
• on_wasm_stack 🔒
  Runs the given function on a separate stack so that its stack usage can be bounded. Stack overflows and other traps can be caught and execution returned to the root of the stack.
• platform_init 🔒 ^⚠
• process_illegal_op 🔒 ^⚠
• raise_lib_trap^⚠
  Raises a trap from inside library code immediately.
• raise_user_trap^⚠
  Raises a user-defined trap immediately.
• resume_panic^⚠
  Carries a Rust panic across wasm code and resumes the panic on the other side.
• set_stack_size
  Default stack size is 1MB.
• trap_handler 🔒 ^⚠
• unwind_with 🔒 ^⚠
• update_context 🔒 ^⚠
• wasmer_call_trampoline^⚠
  Call the wasm function pointed to by callee.

Type Aliases

• TrapHandlerFn
  Function which may handle custom signals while processing traps.