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From: H.J. Lu <hjl@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] support: Replace MINSIGSTKSZ with sysconf (_SC_MINSIGSTKSZ) Date: Fri, 9 Jul 2021 22:21:27 +0000 (GMT) [thread overview] Message-ID: <20210709222127.2885C385740A@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=28d07380c2ae5786e242be336ccc1c9e3111f3fa commit 28d07380c2ae5786e242be336ccc1c9e3111f3fa Author: H.J. Lu <hjl.tools@gmail.com> Date: Fri Jul 9 14:17:04 2021 -0700 support: Replace MINSIGSTKSZ with sysconf (_SC_MINSIGSTKSZ) Replace MINSIGSTKSZ with sysconf (_SC_MINSIGSTKSZ) since the constant MINSIGSTKSZ used in glibc build may be too small. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Diff: --- support/support_stack_alloc.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/support/support_stack_alloc.c b/support/support_stack_alloc.c index 03494dd185..b05ae08968 100644 --- a/support/support_stack_alloc.c +++ b/support/support_stack_alloc.c @@ -39,10 +39,11 @@ support_stack_alloc (size_t size) if (pagesize == -1) FAIL_EXIT1 ("sysconf (_SC_PAGESIZE): %m\n"); - /* Always supply at least MINSIGSTKSZ space; passing 0 as size means - only that much space. No matter what the number is, round it up - to a whole number of pages. */ - size_t stacksize = roundup (size + MINSIGSTKSZ, pagesize); + /* Always supply at least sysconf (_SC_MINSIGSTKSZ) space; passing 0 + as size means only that much space. No matter what the number is, + round it up to a whole number of pages. */ + size_t stacksize = roundup (size + sysconf (_SC_MINSIGSTKSZ), + pagesize); /* The guard bands need to be large enough to intercept offset accesses from a stack address that might otherwise hit another
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