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AK: Add stack size fixup for musl libc

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Fixes #16681
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ptrcnull 2024-05-12 03:13:40 +02:00 committed by Andrew Kaster
parent ce7c925924
commit 13e44ab035
Notes: sideshowbarker 2024-07-17 07:16:27 +09:00 
Author: https://github.com/ptrcnull 🔰
Commit: https://github.com/SerenityOS/serenity/commit/13e44ab035
Pull-request: https://github.com/SerenityOS/serenity/pull/24287
Issue: https://github.com/SerenityOS/serenity/issues/16681
Reviewed-by: https://github.com/ADKaster ✅
1 changed files with 16 additions and 0 deletions
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16
AK/StackInfo.cpp
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@ -14,6 +14,7 @@
# include <serenity.h>
#elif defined(AK_OS_LINUX) || defined(AK_LIBC_GLIBC) || defined(AK_OS_MACOS) || defined(AK_OS_IOS) || defined(AK_OS_NETBSD) || defined(AK_OS_SOLARIS) || defined(AK_OS_HAIKU)
# include <pthread.h>
# include <sys/resource.h>
#elif defined(AK_OS_FREEBSD) || defined(AK_OS_OPENBSD)
# include <pthread.h>
# include <pthread_np.h>
@ -95,6 +96,21 @@ StackInfo::StackInfo()
#endif
m_top = m_base + m_size;
#if defined(AK_OS_LINUX) && !defined(AK_OS_ANDROID) && !defined(AK_LIBC_GLIBC)
// Note: musl libc always gives the initial size of the main thread's stack
if (getpid() == static_cast<pid_t>(gettid())) {
rlimit limit;
getrlimit(RLIMIT_STACK, &limit);
rlim_t size = limit.rlim_cur;
if (size == RLIM_INFINITY)
size = 8 * 0x10000;
// account for a guard page
size -= static_cast<rlim_t>(sysconf(_SC_PAGESIZE));
m_size = static_cast<size_t>(size);
m_base = m_top - m_size;
}
#endif
}
}