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deps: support madvise(3C) across ALL illumos revisions

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In illumos, madvise(3C) now takes `void *` for its first argument
post-illumos#14418, but uses `caddr_t` pre-illumos#14418. This fix will
detect if the illumos mman.h file in use is pre-or-post-illumos#14418 so
builds can work either way.

PR-URL: https://github.com/nodejs/node/pull/58237
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
This commit is contained in:
Dan McDonald 2025-08-07 10:14:08 -04:00 • committed by GitHub
parent 60a58f63a1
commit 5baff3e47b
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2 changed files with 14 additions and 2 deletions
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2
common.gypi
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@ -38,7 +38,7 @@
# 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.17',
'v8_embedder_string': '-node.18',
##### V8 defaults for Node.js #####

14
deps/v8/src/base/platform/platform-posix.cc vendored
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@ -80,7 +80,19 @@
#define MAP_ANONYMOUS MAP_ANON
#endif
#if defined(V8_OS_SOLARIS)
/*
* NOTE: illumos starting with illumos#14418 (pushed April 20th, 2022)
* prototypes madvise(3C) properly with a `void *` first argument.
* The only way to detect this outside of configure-time checking is to
* check for the existence of MEMCNTL_SHARED, which gets defined for the first
* time in illumos#14418 under the same circumstances save _STRICT_POSIX, which
* thankfully neither Solaris nor illumos builds of Node or V8 do.
*
* If some future illumos push changes the MEMCNTL_SHARED assumptions made
* above, the illumos check below will have to be revisited. This check
* will work on both pre-and-post illumos#14418 illumos environments.
*/
#if defined(V8_OS_SOLARIS) && !(defined(__illumos__) && defined(MEMCNTL_SHARED))
#if (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE > 2) || defined(__EXTENSIONS__)
extern "C" int madvise(caddr_t, size_t, int);
#else