libcxx: update to LLVM 18

release/18.x branch, commit 78b99c73ee4b96fe9ce0e294d4632326afb2db42

This adds the flag `-D_LIBCPP_HARDENING_MODE` which is determined based
on the Zig optimization mode.

This commit also fixes libunwind, libcxx, and libcxxabi to properly
report sub compilation errors.

1 files changed, 104 insertions, 124 deletions

diff --git a/lib/libcxx/include/stdexcept b/lib/libcxx/include/stdexcept
index 5428535a10..3016c130a9 100644
--- a/lib/libcxx/include/stdexcept
+++ b/lib/libcxx/include/stdexcept
@@ -44,8 +44,8 @@ public:
 #include <__assert> // all public C++ headers provide the assertion handler
 #include <__config>
 #include <__exception/exception.h>
+#include <__fwd/string.h>
 #include <__verbose_abort>
-#include <iosfwd>  // for string forward decl
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -54,159 +54,154 @@ public:
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-class _LIBCPP_HIDDEN __libcpp_refstring
-{
-    const char* __imp_;
+class _LIBCPP_HIDDEN __libcpp_refstring {
+  const char* __imp_;
+
+  bool __uses_refcount() const;
 
-    bool __uses_refcount() const;
 public:
-    explicit __libcpp_refstring(const char* __msg);
-    __libcpp_refstring(const __libcpp_refstring& __s) _NOEXCEPT;
-    __libcpp_refstring& operator=(const __libcpp_refstring& __s) _NOEXCEPT;
-    ~__libcpp_refstring();
+  explicit __libcpp_refstring(const char* __msg);
+  __libcpp_refstring(const __libcpp_refstring& __s) _NOEXCEPT;
+  __libcpp_refstring& operator=(const __libcpp_refstring& __s) _NOEXCEPT;
+  ~__libcpp_refstring();
 
-    _LIBCPP_HIDE_FROM_ABI const char* c_str() const _NOEXCEPT {return __imp_;}
+  _LIBCPP_HIDE_FROM_ABI const char* c_str() const _NOEXCEPT { return __imp_; }
 };
 #endif // !_LIBCPP_ABI_VCRUNTIME
 
 _LIBCPP_END_NAMESPACE_STD
 
-namespace std  // purposefully not using versioning namespace
+namespace std // purposefully not using versioning namespace
 {
 
-class _LIBCPP_EXPORTED_FROM_ABI logic_error
-    : public exception
-{
+class _LIBCPP_EXPORTED_FROM_ABI logic_error : public exception {
 #ifndef _LIBCPP_ABI_VCRUNTIME
+
 private:
-    _VSTD::__libcpp_refstring __imp_;
+  std::__libcpp_refstring __imp_;
+
 public:
-    explicit logic_error(const string&);
-    explicit logic_error(const char*);
+  explicit logic_error(const string&);
+  explicit logic_error(const char*);
 
-    logic_error(const logic_error&) _NOEXCEPT;
-    logic_error& operator=(const logic_error&) _NOEXCEPT;
+  logic_error(const logic_error&) _NOEXCEPT;
+  logic_error& operator=(const logic_error&) _NOEXCEPT;
 
-    ~logic_error() _NOEXCEPT override;
+  ~logic_error() _NOEXCEPT override;
 
-    const char* what() const _NOEXCEPT override;
+  const char* what() const _NOEXCEPT override;
 #else
+
 public:
-    explicit logic_error(const _VSTD::string&); // Symbol uses versioned std::string
-    _LIBCPP_INLINE_VISIBILITY explicit logic_error(const char* __s) : exception(__s) {}
+  explicit logic_error(const std::string&); // Symbol uses versioned std::string
+  _LIBCPP_HIDE_FROM_ABI explicit logic_error(const char* __s) : exception(__s) {}
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI runtime_error
-    : public exception
-{
+class _LIBCPP_EXPORTED_FROM_ABI runtime_error : public exception {
 #ifndef _LIBCPP_ABI_VCRUNTIME
+
 private:
-    _VSTD::__libcpp_refstring __imp_;
+  std::__libcpp_refstring __imp_;
+
 public:
-    explicit runtime_error(const string&);
-    explicit runtime_error(const char*);
+  explicit runtime_error(const string&);
+  explicit runtime_error(const char*);
 
-    runtime_error(const runtime_error&) _NOEXCEPT;
-    runtime_error& operator=(const runtime_error&) _NOEXCEPT;
+  runtime_error(const runtime_error&) _NOEXCEPT;
+  runtime_error& operator=(const runtime_error&) _NOEXCEPT;
 
-    ~runtime_error() _NOEXCEPT override;
+  ~runtime_error() _NOEXCEPT override;
 
-    const char* what() const _NOEXCEPT override;
+  const char* what() const _NOEXCEPT override;
 #else
+
 public:
-   explicit runtime_error(const _VSTD::string&); // Symbol uses versioned std::string
-   _LIBCPP_INLINE_VISIBILITY explicit runtime_error(const char* __s) : exception(__s) {}
+  explicit runtime_error(const std::string&); // Symbol uses versioned std::string
+  _LIBCPP_HIDE_FROM_ABI explicit runtime_error(const char* __s) : exception(__s) {}
 #endif // _LIBCPP_ABI_VCRUNTIME
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI domain_error
-    : public logic_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI domain_error : public logic_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit domain_error(const string& __s) : logic_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit domain_error(const char* __s)   : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit domain_error(const string& __s) : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit domain_error(const char* __s) : logic_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI domain_error(const domain_error&) _NOEXCEPT = default;
-    ~domain_error() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI domain_error(const domain_error&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI domain_error& operator=(const domain_error&) _NOEXCEPT = default;
+  ~domain_error() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI invalid_argument
-    : public logic_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI invalid_argument : public logic_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit invalid_argument(const string& __s) : logic_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit invalid_argument(const char* __s)   : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit invalid_argument(const string& __s) : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit invalid_argument(const char* __s) : logic_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI invalid_argument(const invalid_argument&) _NOEXCEPT = default;
-    ~invalid_argument() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI invalid_argument(const invalid_argument&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI invalid_argument& operator=(const invalid_argument&) _NOEXCEPT = default;
+  ~invalid_argument() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI length_error
-    : public logic_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI length_error : public logic_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit length_error(const string& __s) : logic_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit length_error(const char* __s)   : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit length_error(const string& __s) : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit length_error(const char* __s) : logic_error(__s) {}
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI length_error(const length_error&) _NOEXCEPT = default;
-    ~length_error() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI length_error(const length_error&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI length_error& operator=(const length_error&) _NOEXCEPT = default;
+  ~length_error() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI out_of_range
-    : public logic_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI out_of_range : public logic_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit out_of_range(const string& __s) : logic_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit out_of_range(const char* __s)   : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit out_of_range(const string& __s) : logic_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit out_of_range(const char* __s) : logic_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI out_of_range(const out_of_range&) _NOEXCEPT = default;
-    ~out_of_range() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI out_of_range(const out_of_range&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI out_of_range& operator=(const out_of_range&) _NOEXCEPT = default;
+  ~out_of_range() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI range_error
-    : public runtime_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI range_error : public runtime_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit range_error(const string& __s) : runtime_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit range_error(const char* __s)   : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit range_error(const string& __s) : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit range_error(const char* __s) : runtime_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI range_error(const range_error&) _NOEXCEPT = default;
-    ~range_error() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI range_error(const range_error&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI range_error& operator=(const range_error&) _NOEXCEPT = default;
+  ~range_error() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI overflow_error
-    : public runtime_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI overflow_error : public runtime_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit overflow_error(const string& __s) : runtime_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit overflow_error(const char* __s)   : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit overflow_error(const string& __s) : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit overflow_error(const char* __s) : runtime_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI overflow_error(const overflow_error&) _NOEXCEPT = default;
-    ~overflow_error() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI overflow_error(const overflow_error&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI overflow_error& operator=(const overflow_error&) _NOEXCEPT = default;
+  ~overflow_error() _NOEXCEPT override;
 #endif
 };
 
-class _LIBCPP_EXPORTED_FROM_ABI underflow_error
-    : public runtime_error
-{
+class _LIBCPP_EXPORTED_FROM_ABI underflow_error : public runtime_error {
 public:
-    _LIBCPP_INLINE_VISIBILITY explicit underflow_error(const string& __s) : runtime_error(__s) {}
-    _LIBCPP_INLINE_VISIBILITY explicit underflow_error(const char* __s)   : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit underflow_error(const string& __s) : runtime_error(__s) {}
+  _LIBCPP_HIDE_FROM_ABI explicit underflow_error(const char* __s) : runtime_error(__s) {}
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-    _LIBCPP_HIDE_FROM_ABI underflow_error(const underflow_error&) _NOEXCEPT = default;
-    ~underflow_error() _NOEXCEPT override;
+  _LIBCPP_HIDE_FROM_ABI underflow_error(const underflow_error&) _NOEXCEPT            = default;
+  _LIBCPP_HIDE_FROM_ABI underflow_error& operator=(const underflow_error&) _NOEXCEPT = default;
+  ~underflow_error() _NOEXCEPT override;
 #endif
 };
 
@@ -217,83 +212,67 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 // in the dylib
 _LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __throw_runtime_error(const char*);
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_logic_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_logic_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw logic_error(__msg);
+  throw logic_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("logic_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("logic_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_domain_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_domain_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw domain_error(__msg);
+  throw domain_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("domain_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("domain_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_invalid_argument(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_invalid_argument(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw invalid_argument(__msg);
+  throw invalid_argument(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("invalid_argument was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("invalid_argument was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_length_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_length_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw length_error(__msg);
+  throw length_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("length_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("length_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_out_of_range(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_out_of_range(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw out_of_range(__msg);
+  throw out_of_range(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("out_of_range was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("out_of_range was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_range_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_range_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw range_error(__msg);
+  throw range_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("range_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("range_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_overflow_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_overflow_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw overflow_error(__msg);
+  throw overflow_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("overflow_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("overflow_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-void __throw_underflow_error(const char*__msg)
-{
+_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_underflow_error(const char* __msg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw underflow_error(__msg);
+  throw underflow_error(__msg);
 #else
-    _LIBCPP_VERBOSE_ABORT("underflow_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
+  _LIBCPP_VERBOSE_ABORT("underflow_error was thrown in -fno-exceptions mode with message \"%s\"", __msg);
 #endif
 }
 
@@ -302,6 +281,7 @@ _LIBCPP_END_NAMESPACE_STD
 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  include <cstdlib>
 #  include <exception>
+#  include <iosfwd>
 #endif
 
 #endif // _LIBCPP_STDEXCEPT