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GGitHub[libc] Refactor AUXV handling with new auxv.h header library (#162326)

0db5ba0c创建于 2025年10月8日历史提交

文件	最后提交记录	最后更新时间
linux	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
CMakeLists.txt	[libc] suppress more clang-cl warnings (#117718) - migrate more -O3 to ${libc_opt_high_flag} - workaround a issue with LLP64 in test. The overflow testing is guarded by a constexpr but the literal overflow itself will still trigger warnings. Notice that for math smoke test, for some reasons, the ${libc_opt_high_flag} will be passed into lld-link which confuses the linker so there are still some warnings leftover there. I can investigate more when I have time.	1 年前
call_once.cpp	[libc] Refactor AUXV handling with new auxv.h header library (#162326) Closes https://github.com/llvm/llvm-project/issues/153666 This patch introduces a new centralized AUXV (auxiliary vector) handling mechanism for LLVM libc on Linux, replacing the previous scattered implementation across multiple files. ## Key Changes: ### New Files: - **libc/src/__support/OSUtil/linux/auxv.h**: New header library providing a clean interface for AUXV access with: - auxv::Entry struct for AUXV entries (type and value) - auxv::Vector class with iterator support for traversing AUXV - auxv::get() function for retrieving specific AUXV values - Thread-safe initialization with fallback mechanisms (prctl and /proc/self/auxv) ### Modified Files: 1. **libc/src/__support/OSUtil/linux/CMakeLists.txt**: - Added auxv header library declaration with proper dependencies: - libc.hdr.fcntl_macros - libc.src.__support.OSUtil.osutil - libc.src.__support.common - libc.src.__support.CPP.optional - libc.src.__support.threads.callonce 2. **libc/config/linux/app.h**: - Removed AuxEntry struct (moved to auxv.h as auxv::Entry) - Removed auxv_ptr from AppProperties struct - Simplified application properties structure 3. **libc/src/sys/auxv/linux/getauxval.cpp**: - Completely refactored to use new auxv.h interface - Removed ~200 lines of complex initialization code - Simplified to just call auxv::get() function - Removed dependencies to external symbols (mman, prctl, fcntl, read, close, open) 4. **libc/src/sys/auxv/linux/CMakeLists.txt**: - Updated dependencies to use new auxv header library - Removed dependencies to external symbols (prctl, mman, fcntl, unistd, etc.) 5. **libc/startup/linux/do_start.cpp**: - Updated to use new auxv::Vector interface - Changed from pointer-based to iterator-based AUXV traversal - Updated field names (aux_entry->id → aux_entry.type, aux_entry->value → aux_entry.val) - Added call to auxv::Vector::initialize_unsafe() for early AUXV setup 6. **libc/startup/linux/CMakeLists.txt**: - Added dependency on libc.src.__support.OSUtil.linux.auxv	9 个月前
call_once.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
cnd_broadcast.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
cnd_destroy.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
cnd_init.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
cnd_signal.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
cnd_wait.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_destroy.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_destroy.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_init.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_init.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_lock.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_lock.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_unlock.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
mtx_unlock.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_create.cpp	[libc] Move libc_errno.h to libc/src/__support and make LIBC_ERRNO_MODE_SYSTEM to be header-only. (#143187) This is the first step in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450	1 年前
thrd_create.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_current.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_current.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_detach.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_detach.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_equal.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_equal.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_exit.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_exit.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_join.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
thrd_join.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_create.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_create.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_delete.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_delete.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_get.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_get.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_set.cpp	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前
tss_set.h	[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597) This is a part of #97655.	2 年前