{"id":79719,"date":"2020-04-29T19:42:30","date_gmt":"2020-04-29T17:42:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/razrabotchiki-v8-predstavili-dekompilyator-dlya-webassembly"},"modified":"2020-04-29T19:42:30","modified_gmt":"2020-04-29T17:42:30","slug":"razrabotchiki-v8-predstavili-dekompilyator-dlya-webassembly","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/razrabotchiki-v8-predstavili-dekompilyator-dlya-webassembly","title":{"rendered":"Los desarrolladores de V8 han presentado un descompilador para WebAssembly","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Los desarrolladores del motor JavaScript V8 presentaron<\/a><\/noindex> herramienta wasm-decompile<\/a><\/noindex>, que permite descompilar la representaci\u00f3n binaria intermedia WebAssembly<\/a><\/noindex> en un lenguaje pseudoc\u00f3digo legible, que recuerda a JavaScript y C. El pseudoc\u00f3digo propuesto es significativamente m\u00e1s f\u00e1cil de entender y m\u00e1s adecuado para el an\u00e1lisis manual que la representaci\u00f3n textual de WebAssembly en formato , que se asemeja m\u00e1s al ensamblador que a lenguajes de alto nivel. Al mismo tiempo, la descompilaci\u00f3n refleja por completo la representaci\u00f3n de Wasm seg\u00fan sea posible.<\/p>\n

Descompilador activado<\/a><\/noindex> dentro del conjunto de herramientas WABT<\/a><\/noindex>, que proporciona la traducci\u00f3n entre representaciones binarias y textuales de WebAssembly, as\u00ed como an\u00e1lisis, procesamiento, modificaci\u00f3n y verificaci\u00f3n de archivos wasm. Dentro de WABT tambi\u00e9n se desarrolla la herramienta wasm2c<\/a><\/noindex>, que permite descompilar archivos wasm en un c\u00f3digo equivalente en lenguaje C, que puede ser compilado por un compilador de C, pero en t\u00e9rminos de legibilidad no se diferencia mucho del formato textual .<\/p>\n

Por ejemplo, una funci\u00f3n en C compilada en wasm<\/p>\n

typedef struct { float x, y, z; } vec3;<\/p>\n

float dot(const vec3 *a, const vec3 *b) {
\n return a->x * b->x +
\n a->y * b->y +
\n a->z * b->z;
\n }<\/p>\n

ser\u00e1 descompilada por la herramienta wasm-decompile en el pseudo-lenguaje<\/p>\n

function dot(a:{ a:float, b:float, c:float },
\n b:{ a:float, b:float, c:float }):float {
\n return a.a * b.a + a.b * b.b + a.c * b.c
\n }<\/p>\n

mientras que la conversi\u00f3n al formato textual se ver\u00e1 de la siguiente manera<\/p>\n

(func $dot (type 0) (param i32 i32) (result f32)
\n (f32.add
\n (f32.add
\n (f32.mul
\n (f32.load
\n (local.get 0))
\n (f32.load
\n (local.get 1)))
\n (f32.mul
\n (f32.load offset=4
\n (local.get 0))
\n (f32.load offset=4
\n (local.get 1))))
\n (f32.mul
\n (f32.load offset=8
\n (local.get 0))
\n (f32.load offset=8
\n (local.get 1))))))<\/p>\n

<\/a><\/noindex><\/p>\n

Fuente: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-79719","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Los desarrolladores de V8 han presentado un descompilador para WebAssembly | ProHoster","description":"Los desarrolladores del motor JavaScript V8 han presentado una 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