Commit bfc94df3743 for nodejs

commit bfc94df37434f66df13725e348e4191ae056cfaf
Author: Gundepalli Sravani <Gundepalli.Sravani1@ibm.com>
Date:   Tue Aug 25 11:53:47 2026 +0530

    deps: V8: cherry-pick f4221e09e812

    Original commit message:

        AIX: implement Stack::ObtainCurrentThreadStackReservedLimit

        Port 5a54f45b671bdf47e083ffbad547713d8bacb28f

        AIX lacks `pthread_getattr_np()` so we implement the function using
        pthread_getthrds_np() with PTHRDSINFO_QUERY_ALL, consistent with
        ObtainCurrentThreadStackStart(). The `__pi_stackaddr` field maps to the
        lowest stack address, equivalent to the base returned by
        pthread_attr_getstack() on other POSIX platforms.

        IT: 145

        Change-Id: Ia1a34912630e3128f61fa0fca502429b837d611f
        Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/8236132
        Reviewed-by: Milad Farazmand <mfarazma@ibm.com>
        Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
        Commit-Queue: Milad Farazmand <mfarazma@ibm.com>
        Cr-Commit-Position: refs/heads/main@{#109640}

    Refs: https://github.com/v8/v8/commit/f4221e09e812c33900520c445267b8979fcf8fe8
    Signed-off-by: Joyee Cheung <joyeec9h3@gmail.com>
    PR-URL: https://github.com/nodejs/node/pull/65161
    Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
    Reviewed-By: Richard Lau <richard.lau@ibm.com>

diff --git a/common.gypi b/common.gypi
index d0380616db6..eb7b70b59d4 100644
--- a/common.gypi
+++ b/common.gypi
@@ -44,7 +44,7 @@

     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.12',
+    'v8_embedder_string': '-node.13',

     ##### V8 defaults for Node.js #####

diff --git a/deps/v8/src/base/platform/platform-aix.cc b/deps/v8/src/base/platform/platform-aix.cc
index 70b43d11c9e..3593f36239a 100644
--- a/deps/v8/src/base/platform/platform-aix.cc
+++ b/deps/v8/src/base/platform/platform-aix.cc
@@ -147,7 +147,7 @@ Stack::StackSlot Stack::ObtainCurrentThreadStackStart() {
   //   |
   //   V
   //
-  // lower address -----  __pi_stackaddr, current sp
+  // lower address -----  __pi_stackaddr, reserved stack limit

   pthread_t tid = pthread_self();
   struct __pthrdsinfo buf;
@@ -164,6 +164,26 @@ Stack::StackSlot Stack::ObtainCurrentThreadStackStart() {
   return reinterpret_cast<void*>(buf.__pi_stackend);
 }

+// static
+Stack::StackSlot Stack::ObtainCurrentThreadStackReservedLimit() {
+  pthread_t tid = pthread_self();
+  struct __pthrdsinfo buf;
+  memset(&buf, 0, sizeof(buf));
+  char regbuf[1];
+  int regbufsize = sizeof(regbuf);
+
+  const int rc = pthread_getthrds_np(&tid, PTHRDSINFO_QUERY_ALL, &buf,
+                                     sizeof(buf), regbuf, &regbufsize);
+  if (rc != 0) {
+    return nullptr;
+  }
+
+  if (buf.__pi_stackaddr == NULL) {
+    return nullptr;
+  }
+  return reinterpret_cast<void*>(buf.__pi_stackaddr);
+}
+
 // static
 bool OS::DecommitPages(void* address, size_t size) {
   // The difference between this implementation and the alternative under