diff options
Diffstat (limited to 'wasm/runtime.c')
-rw-r--r-- | wasm/runtime.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/wasm/runtime.c b/wasm/runtime.c new file mode 100644 index 0000000000..89b06be6ad --- /dev/null +++ b/wasm/runtime.c @@ -0,0 +1,54 @@ +#include "wasm/machine.h" +#include "wasm/setjmp.h" +#include "wasm/fiber.h" +#include "wasm/asyncify.h" +#include <stdlib.h> + +int rb_wasm_rt_start(int (main)(int argc, char **argv), int argc, char **argv) { + int result; + void *asyncify_buf; + + bool new_fiber_started = false; + void *arg0 = NULL, *arg1 = NULL; + void (*fiber_entry_point)(void *, void *) = NULL; + + while (1) { + if (fiber_entry_point) { + fiber_entry_point(arg0, arg1); + } else { + result = main(argc, argv); + } + + extern void *rb_asyncify_unwind_buf; + // Exit Asyncify loop if there is no unwound buffer, which + // means that main function has returned normally. + if (rb_asyncify_unwind_buf == NULL) { + break; + } + + // NOTE: it's important to call 'asyncify_stop_unwind' here instead in rb_wasm_handle_jmp_unwind + // because unless that, Asyncify inserts another unwind check here and it unwinds to the root frame. + asyncify_stop_unwind(); + + if ((asyncify_buf = rb_wasm_handle_jmp_unwind()) != NULL) { + asyncify_start_rewind(asyncify_buf); + continue; + } + if ((asyncify_buf = rb_wasm_handle_scan_unwind()) != NULL) { + asyncify_start_rewind(asyncify_buf); + continue; + } + + asyncify_buf = rb_wasm_handle_fiber_unwind(&fiber_entry_point, &arg0, &arg1, &new_fiber_started); + // Newly starting fiber doesn't have asyncify buffer yet, so don't rewind it for the first time entry + if (asyncify_buf) { + asyncify_start_rewind(asyncify_buf); + continue; + } else if (new_fiber_started) { + continue; + } + + break; + } + return result; +} |