fix(node): track `SIG*` listeners in `process.listeners` (#23890)

Some npm libraries like `signal-exit` rely on the length of the listener
array returned by `process.listeners("SIGNT")` to be correct to
function. We weren't tracking `SIG*` events there, which broke those npm
libraries.

Fixes https://github.com/denoland/deno/issues/22892

1 files changed, 3 insertions, 0 deletions

diff --git a/ext/node/polyfills/process.ts b/ext/node/polyfills/process.ts
index 9c73f5a51..f742e6634 100644
--- a/ext/node/polyfills/process.ts
+++ b/ext/node/polyfills/process.ts
@@ -469,6 +469,7 @@ Process.prototype.on = function (
     } else if (event === "SIGTERM" && Deno.build.os === "windows") {
       // Ignores SIGTERM on windows.
     } else {
+      EventEmitter.prototype.on.call(this, event, listener);
       Deno.addSignalListener(event as Deno.Signal, listener);
     }
   } else {
@@ -494,6 +495,7 @@ Process.prototype.off = function (
     } else if (event === "SIGTERM" && Deno.build.os === "windows") {
       // Ignores SIGTERM on windows.
     } else {
+      EventEmitter.prototype.off.call(this, event, listener);
       Deno.removeSignalListener(event as Deno.Signal, listener);
     }
   } else {
@@ -537,6 +539,7 @@ Process.prototype.prependListener = function (
     if (event === "SIGBREAK" && Deno.build.os !== "windows") {
       // Ignores SIGBREAK if the platform is not windows.
     } else {
+      EventEmitter.prototype.prependListener.call(this, event, listener);
       Deno.addSignalListener(event as Deno.Signal, listener);
     }
   } else {