Toshaan Bharvani
1 year ago
34 changed files with 423 additions and 86 deletions
@ -0,0 +1,33 @@
@@ -0,0 +1,33 @@
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2022-04-21 Jakub Jelinek <jakub@redhat.com> |
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PR target/105331 |
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* config/i386/i386.c (ix86_gimplify_va_arg): Mark va_arg_tmp |
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temporary TREE_ADDRESSABLE before trying to gimplify ADDR_EXPR |
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of it. |
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* gcc.dg/pr105331.c: New test. |
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--- gcc/config/i386/i386.c.jj 2022-04-12 09:20:07.566662842 +0200 |
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+++ gcc/config/i386/i386.c 2022-04-21 12:03:32.201951522 +0200 |
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@@ -4891,6 +4891,7 @@ ix86_gimplify_va_arg (tree valist, tree |
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{ |
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int i, prev_size = 0; |
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tree temp = create_tmp_var (type, "va_arg_tmp"); |
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+ TREE_ADDRESSABLE (temp) = 1; |
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|
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/* addr = &temp; */ |
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t = build1 (ADDR_EXPR, build_pointer_type (type), temp); |
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--- gcc/testsuite/gcc.dg/pr105331.c.jj 2022-04-21 12:09:34.398906718 +0200 |
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+++ gcc/testsuite/gcc.dg/pr105331.c 2022-04-21 12:09:07.304283903 +0200 |
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@@ -0,0 +1,11 @@ |
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+/* PR target/105331 */ |
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+/* { dg-do compile } */ |
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+/* { dg-options "-O -Wuninitialized" } */ |
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+ |
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+#include <stdarg.h> |
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+ |
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+int |
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+foo (va_list *va) |
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+{ |
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+ return va_arg (*va, double _Complex); /* { dg-bogus "may be used uninitialized" } */ |
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+} |
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@ -0,0 +1,388 @@
@@ -0,0 +1,388 @@
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commit c725028a8bb9478ec84332641147ad12b9236922 |
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Author: Jonathan Wakely <jwakely@redhat.com> |
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Date: Tue Dec 14 14:32:35 2021 +0000 |
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libstdc++: Fix handling of invalid ranges in std::regex [PR102447] |
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std::regex currently allows invalid bracket ranges such as [\w-a] which |
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are only allowed by ECMAScript when in web browser compatibility mode. |
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It should be an error, because the start of the range is a character |
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class, not a single character. The current implementation of |
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_Compiler::_M_expression_term does not provide a way to reject this, |
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because we only remember a previous character, not whether we just |
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processed a character class (or collating symbol etc.) |
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|
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This patch replaces the pair<bool, CharT> used to emulate |
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optional<CharT> with a custom class closer to pair<tribool,CharT>. That |
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allows us to track three states, so that we can tell when we've just |
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seen a character class. |
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|
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With this additional state the code in _M_expression_term for processing |
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the _S_token_bracket_dash can be improved to correctly reject the [\w-a] |
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case, without regressing for valid cases such as [\w-] and [----]. |
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|
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libstdc++-v3/ChangeLog: |
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PR libstdc++/102447 |
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* include/bits/regex_compiler.h (_Compiler::_BracketState): New |
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class. |
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(_Compiler::_BrackeyMatcher): New alias template. |
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(_Compiler::_M_expression_term): Change pair<bool, CharT> |
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parameter to _BracketState. Process first character for |
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ECMAScript syntax as well as POSIX. |
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* include/bits/regex_compiler.tcc |
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(_Compiler::_M_insert_bracket_matcher): Pass _BracketState. |
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(_Compiler::_M_expression_term): Use _BracketState to store |
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state between calls. Improve handling of dashes in ranges. |
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* testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc: |
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Add more tests for ranges containing dashes. Check invalid |
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ranges with character class at the beginning. |
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|
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(cherry picked from commit 7ce3c230edf6e498e125c805a6dd313bf87dc439) |
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diff --git a/libstdc++-v3/include/bits/regex_compiler.h b/libstdc++-v3/include/bits/regex_compiler.h |
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index f224fcb06e0..aa19df2bf9a 100644 |
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--- a/libstdc++-v3/include/bits/regex_compiler.h |
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+++ b/libstdc++-v3/include/bits/regex_compiler.h |
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@@ -122,13 +122,45 @@ namespace __detail |
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void |
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_M_insert_bracket_matcher(bool __neg); |
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|
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- // Returns true if successfully matched one term and should continue. |
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+ // Cache of the last atom seen in a bracketed range expression. |
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+ struct _BracketState |
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+ { |
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+ enum class _Type : char { _None, _Char, _Class } _M_type = _Type::_None; |
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+ _CharT _M_char; |
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+ |
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+ void |
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+ set(_CharT __c) noexcept { _M_type = _Type::_Char; _M_char = __c; } |
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+ |
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+ _GLIBCXX_NODISCARD _CharT |
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+ get() const noexcept { return _M_char; } |
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+ |
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+ void |
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+ reset(_Type __t = _Type::_None) noexcept { _M_type = __t; } |
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+ |
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+ explicit operator bool() const noexcept |
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+ { return _M_type != _Type::_None; } |
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+ |
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+ // Previous token was a single character. |
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+ _GLIBCXX_NODISCARD bool |
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+ _M_is_char() const noexcept { return _M_type == _Type::_Char; } |
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+ |
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+ // Previous token was a character class, equivalent class, |
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+ // collating symbol etc. |
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+ _GLIBCXX_NODISCARD bool |
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+ _M_is_class() const noexcept { return _M_type == _Type::_Class; } |
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+ }; |
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+ |
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+ template<bool __icase, bool __collate> |
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+ using _BracketMatcher |
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+ = std::__detail::_BracketMatcher<_TraitsT, __icase, __collate>; |
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+ |
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+ // Returns true if successfully parsed one term and should continue |
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+ // compiling a bracket expression. |
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// Returns false if the compiler should move on. |
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template<bool __icase, bool __collate> |
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bool |
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- _M_expression_term(pair<bool, _CharT>& __last_char, |
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- _BracketMatcher<_TraitsT, __icase, __collate>& |
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- __matcher); |
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+ _M_expression_term(_BracketState& __last_char, |
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+ _BracketMatcher<__icase, __collate>& __matcher); |
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|
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int |
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_M_cur_int_value(int __radix); |
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diff --git a/libstdc++-v3/include/bits/regex_compiler.tcc b/libstdc++-v3/include/bits/regex_compiler.tcc |
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index ea07bc2428e..7769a9e63a3 100644 |
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--- a/libstdc++-v3/include/bits/regex_compiler.tcc |
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+++ b/libstdc++-v3/include/bits/regex_compiler.tcc |
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@@ -403,7 +403,7 @@ namespace __detail |
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_M_insert_character_class_matcher() |
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{ |
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__glibcxx_assert(_M_value.size() == 1); |
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- _BracketMatcher<_TraitsT, __icase, __collate> __matcher |
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+ _BracketMatcher<__icase, __collate> __matcher |
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(_M_ctype.is(_CtypeT::upper, _M_value[0]), _M_traits); |
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__matcher._M_add_character_class(_M_value, false); |
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__matcher._M_ready(); |
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@@ -424,25 +424,17 @@ namespace __detail |
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_Compiler<_TraitsT>:: |
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_M_insert_bracket_matcher(bool __neg) |
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{ |
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- _BracketMatcher<_TraitsT, __icase, __collate> __matcher(__neg, _M_traits); |
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- pair<bool, _CharT> __last_char; // Optional<_CharT> |
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- __last_char.first = false; |
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- if (!(_M_flags & regex_constants::ECMAScript)) |
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- { |
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- if (_M_try_char()) |
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- { |
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- __last_char.first = true; |
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- __last_char.second = _M_value[0]; |
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- } |
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- else if (_M_match_token(_ScannerT::_S_token_bracket_dash)) |
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- { |
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- __last_char.first = true; |
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- __last_char.second = '-'; |
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- } |
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- } |
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- while (_M_expression_term(__last_char, __matcher)); |
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- if (__last_char.first) |
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- __matcher._M_add_char(__last_char.second); |
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+ _BracketMatcher<__icase, __collate> __matcher(__neg, _M_traits); |
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+ _BracketState __last_char; |
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+ if (_M_try_char()) |
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+ __last_char.set(_M_value[0]); |
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+ else if (_M_match_token(_ScannerT::_S_token_bracket_dash)) |
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+ // Dash as first character is a normal character. |
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+ __last_char.set('-'); |
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+ while (_M_expression_term(__last_char, __matcher)) |
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+ ; |
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+ if (__last_char._M_is_char()) |
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+ __matcher._M_add_char(__last_char.get()); |
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__matcher._M_ready(); |
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_M_stack.push(_StateSeqT( |
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*_M_nfa, |
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@@ -447,27 +438,27 @@ namespace __detail |
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template<bool __icase, bool __collate> |
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bool |
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_Compiler<_TraitsT>:: |
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- _M_expression_term(pair<bool, _CharT>& __last_char, |
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- _BracketMatcher<_TraitsT, __icase, __collate>& __matcher) |
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+ _M_expression_term(_BracketState& __last_char, |
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+ _BracketMatcher<__icase, __collate>& __matcher) |
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{ |
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if (_M_match_token(_ScannerT::_S_token_bracket_end)) |
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return false; |
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|
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+ // Add any previously cached char into the matcher and update cache. |
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const auto __push_char = [&](_CharT __ch) |
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{ |
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- if (__last_char.first) |
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- __matcher._M_add_char(__last_char.second); |
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- else |
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- __last_char.first = true; |
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- __last_char.second = __ch; |
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+ if (__last_char._M_is_char()) |
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+ __matcher._M_add_char(__last_char.get()); |
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+ __last_char.set(__ch); |
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}; |
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- const auto __flush = [&] |
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+ // Add any previously cached char into the matcher and update cache. |
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+ const auto __push_class = [&] |
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{ |
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- if (__last_char.first) |
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- { |
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- __matcher._M_add_char(__last_char.second); |
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- __last_char.first = false; |
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- } |
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+ if (__last_char._M_is_char()) |
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+ __matcher._M_add_char(__last_char.get()); |
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+ // We don't cache anything here, just record that the last thing |
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+ // processed was a character class (or similar). |
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+ __last_char.reset(_BracketState::_Type::_Class); |
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}; |
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|
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if (_M_match_token(_ScannerT::_S_token_collsymbol)) |
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@@ -476,16 +467,16 @@ namespace __detail |
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if (__symbol.size() == 1) |
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__push_char(__symbol[0]); |
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else |
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- __flush(); |
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+ __push_class(); |
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} |
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else if (_M_match_token(_ScannerT::_S_token_equiv_class_name)) |
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{ |
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- __flush(); |
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+ __push_class(); |
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__matcher._M_add_equivalence_class(_M_value); |
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} |
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else if (_M_match_token(_ScannerT::_S_token_char_class_name)) |
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{ |
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- __flush(); |
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+ __push_class(); |
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__matcher._M_add_character_class(_M_value, false); |
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} |
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else if (_M_try_char()) |
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@@ -502,49 +493,50 @@ namespace __detail |
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// It turns out that no one reads BNFs ;) |
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else if (_M_match_token(_ScannerT::_S_token_bracket_dash)) |
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{ |
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- if (!__last_char.first) |
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+ if (_M_match_token(_ScannerT::_S_token_bracket_end)) |
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{ |
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- if (!(_M_flags & regex_constants::ECMAScript)) |
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- { |
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- if (_M_match_token(_ScannerT::_S_token_bracket_end)) |
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- { |
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- __push_char('-'); |
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- return false; |
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- } |
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- __throw_regex_error( |
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- regex_constants::error_range, |
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- "Unexpected dash in bracket expression. For POSIX syntax, " |
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- "a dash is not treated literally only when it is at " |
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- "beginning or end."); |
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- } |
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+ // For "-]" the dash is a literal character. |
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__push_char('-'); |
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+ return false; |
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} |
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- else |
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+ else if (__last_char._M_is_class()) |
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+ { |
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+ // "\\w-" is invalid, start of range must be a single char. |
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+ __throw_regex_error(regex_constants::error_range, |
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+ "Invalid start of range in bracket expression."); |
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+ } |
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+ else if (__last_char._M_is_char()) |
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{ |
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if (_M_try_char()) |
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{ |
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- __matcher._M_make_range(__last_char.second, _M_value[0]); |
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- __last_char.first = false; |
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+ // "x-y" |
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+ __matcher._M_make_range(__last_char.get(), _M_value[0]); |
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+ __last_char.reset(); |
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} |
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else if (_M_match_token(_ScannerT::_S_token_bracket_dash)) |
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{ |
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- __matcher._M_make_range(__last_char.second, '-'); |
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- __last_char.first = false; |
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+ // "x--" |
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+ __matcher._M_make_range(__last_char.get(), '-'); |
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+ __last_char.reset(); |
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} |
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else |
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- { |
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- if (_M_scanner._M_get_token() |
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- != _ScannerT::_S_token_bracket_end) |
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- __throw_regex_error( |
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- regex_constants::error_range, |
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- "Character is expected after a dash."); |
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- __push_char('-'); |
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- } |
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+ __throw_regex_error(regex_constants::error_range, |
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+ "Invalid end of range in bracket expression."); |
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} |
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+ else if (_M_flags & regex_constants::ECMAScript) |
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+ { |
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+ // A dash that is not part of an existing range. Might be the |
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+ // start of a new range, or might just be a literal '-' char. |
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+ // Only ECMAScript allows that in the middle of a bracket expr. |
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+ __push_char('-'); |
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+ } |
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+ else |
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+ __throw_regex_error(regex_constants::error_range, |
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+ "Invalid dash in bracket expression."); |
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} |
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else if (_M_match_token(_ScannerT::_S_token_quoted_class)) |
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{ |
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- __flush(); |
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+ __push_class(); |
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__matcher._M_add_character_class(_M_value, |
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_M_ctype.is(_CtypeT::upper, |
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_M_value[0])); |
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diff --git a/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc b/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc |
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index 7df70604ea6..0d76e63da7b 100644 |
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--- a/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc |
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+++ b/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc |
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@@ -69,6 +69,16 @@ test01() |
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void |
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test02() |
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{ |
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+ VERIFY(regex_match("-", regex("[-]", regex_constants::ECMAScript))); |
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+ VERIFY(regex_match("-", regex("[--]", regex_constants::ECMAScript))); |
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+ VERIFY(regex_match("-", regex("[---]", regex_constants::ECMAScript))); |
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+ VERIFY(regex_match("-", regex("[----]", regex_constants::ECMAScript))); |
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+ VERIFY(regex_match("-", regex("[-----]", regex_constants::ECMAScript))); |
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+ |
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+ VERIFY(regex_match("-", regex("[-]", regex_constants::extended))); |
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+ VERIFY(regex_match("-", regex("[--]", regex_constants::extended))); |
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+ VERIFY(regex_match("-", regex("[---]", regex_constants::extended))); |
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+ VERIFY(regex_match("-", regex("[----]", regex_constants::extended))); |
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try |
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{ |
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std::regex re("[-----]", std::regex::extended); |
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@@ -78,7 +88,6 @@ test02() |
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{ |
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VERIFY(e.code() == std::regex_constants::error_range); |
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} |
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- std::regex re("[-----]", std::regex::ECMAScript); |
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|
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VERIFY(!regex_match("b", regex("[-ac]", regex_constants::extended))); |
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VERIFY(!regex_match("b", regex("[ac-]", regex_constants::extended))); |
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@@ -93,7 +102,27 @@ test02() |
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} |
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catch (const std::regex_error& e) |
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{ |
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+ VERIFY(e.code() == std::regex_constants::error_range); |
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+ } |
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+ try |
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+ { |
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+ regex("[@--]", regex_constants::extended); |
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+ VERIFY(false); |
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} |
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+ catch (const std::regex_error& e) |
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+ { |
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+ VERIFY(e.code() == std::regex_constants::error_range); |
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+ } |
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+ try |
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+ { |
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+ regex("[--%]", regex_constants::extended); |
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+ VERIFY(false); |
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+ } |
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+ catch (const std::regex_error& e) |
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+ { |
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+ VERIFY(e.code() == std::regex_constants::error_range); |
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+ } |
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+ |
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VERIFY(regex_match("].", regex("[][.hyphen.]-0]*", regex_constants::extended))); |
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} |
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|
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@@ -158,6 +187,36 @@ test06() |
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VERIFY(regex_match("a-", debian_cron_namespace_ok)); |
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} |
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|
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+// libstdc++/102447 |
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+void |
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+test07() |
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+{ |
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+ VERIFY(regex_match("-", std::regex("[\\w-]", std::regex::ECMAScript))); |
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+ VERIFY(regex_match("a", std::regex("[\\w-]", std::regex::ECMAScript))); |
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+ VERIFY(regex_match("-", std::regex("[a-]", std::regex::ECMAScript))); |
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+ VERIFY(regex_match("a", std::regex("[a-]", std::regex::ECMAScript))); |
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+ |
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+ try |
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+ { |
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+ std::regex re("[\\w-a]", std::regex::ECMAScript); |
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+ VERIFY(false); |
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+ } |
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+ catch (const std::regex_error& e) |
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+ { |
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+ VERIFY(e.code() == std::regex_constants::error_range); |
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+ } |
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+ |
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+ try |
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+ { |
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+ std::regex re("[\\w--]", std::regex::ECMAScript); |
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+ VERIFY(false); |
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+ } |
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+ catch (const std::regex_error& e) |
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+ { |
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+ VERIFY(e.code() == std::regex_constants::error_range); |
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+ } |
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+} |
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+ |
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int |
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main() |
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{ |
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@@ -167,6 +226,7 @@ main() |
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test04(); |
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test05(); |
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test06(); |
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+ test07(); |
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|
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return 0; |
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} |
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