[linuxkernelnewbies] Sparse/ News Archive

[Peter Teoh]

http://www.kernel.org/pub/software/devel/sparse/news.html Sparse/ News Archive RSS Atom Sparse 0.4.1 released I have tagged and tarballed Sparse 0.4.1, now available from http://kernel.org/pub/software/devel/sparse/dist/sparse-0.4.1.tar.gz, with sha1sum 14085c5317cd7f2c8392fb762969906fa91888ef. This bugfix release fixes a Sparse assertion which recent Linux kernels started triggering, along with a few other fixes. Full changelog: Christopher Li (1): Perform local label lookup Emil Medve (1): Handle ignored attribute malloc Josh Triplett (4): Add comment on taint flags enum referencing expr->taint Add test-suite metadata to validation/local-label.c Add known-to-fail test case for a static forward declaration Makefile: VERSION=0.4.1 Mike Frysinger (1): fix install perms of manpages Tilman Sauerbeck (1): Added a prototype for mempcpy(). -- Josh Triplett Posted Tue Nov 13 04:26:45 2007 Sparse 0.4 released I have tagged and tarballed Sparse 0.4, now available from http://kernel.org/pub/software/devel/sparse/dist/sparse-0.4.tar.gz, with sha1sum a77a10174c8cdb5314eb5000c1e4f24458848b91. Highlights and visible changes in this release: The Sparse validation files have become an automated test suite, invoked via make check. Thanks to Damien Lespiau for the initial test-suite script. Also thanks to Pavel Roskin for ideas, discussion, and prototyping, and to the contributors of new test cases and test-suite metadata for existing test cases. New backend c2xml by Rob Taylor, which outputs an XML representation of the variable declarations, function declarations, and data structures in a C file. sparse and cgcc now have manpages. Warning changes: Warn on return <void _expression_>; if given -Wreturn-void; off by default because the C99 standard permits this. Sparse now defaults to -Wno-do-while. Sparse now defaults to -Wdecl. -Wno-old-initializer turns off warnings about non-C99 struct initializers -Wno-non-pointer-null turns off warnings about using a plain integer as a NULL pointer Initializer entries defined twice and bitfields without explicit signs have changed from errors to warnings. cgcc no longer passes -Wall to sparse if given -Wall on the command line. -Wall turns on all Sparse warnings, including experimental and noisy ones. Don't include it just because a project wants to pass -Wall to cc. If you really want cgcc to run sparse with -Wall, set CHECK='sparse -Wall' Support for more builtin functions: __builtin_labs, __builtin_offsetof, __builtin_strcat, __builtin_strncat, and __builtin_strlen. Support for more attributes: constructor, destructor, __always_inline__, __noinline__, used, __syscall_linkage__, format_arg, cdecl, stdcall, fastcall, dllimport, and dllexport. Support for the __DATE__ and __TIME__ preprocessor symbols. Support for __alignof (treated like the existing __alignof__). typeof(bitwise_type) now produces the same type, not an incompatible type; thanks to Al Viro. Various profile-driven optimizations and changes to compiler optimization flags, making Sparse significantly faster. Numerous fixes to C standards compliance, thanks to Al Viro. In particular: Sparse now requires integer constant expressions in various places, not arbitrary expressions. Sparse now handles NULL pointer constants more correctly. Sparse now resolves pointer types more correctly in conditional expressions The graph backend now outputs significantly better program graphs, and the Sparse source code includes some gvpr scripts to modify these graphs in various ways, such as only showing the callers or callees of particular functions. Thanks to Dan Sheridan. Linux-style make output; for a more verbose make with full command lines, make V=1. Thanks to Damien Lespiau. Numerous bugfixes and internal cleanups; thanks to the many Sparse contributors. Full changelog: Al Viro (51): handle __alignof as equivalent of __alignof__ saner reporting of overlaps in initializers check for whitespace before object-like macro body fix alignment for _Bool fix interaction of typeof with bitwise types better recovery from bad operations on bitwise make copying of EXPR_INDEX non-lazy tie the fields of struct in simple list rewrite of initializer handling fix handling of typeof on structs missing NULL checks in initializer handling take cast_to() out of usual_conversions(), do it in callers mechanically split compatible_assignment_types() null pointer constants have no special meaning for pointer subtraction remove long-dead variable in evaluate_ptr_add() remove useless argument in evaluate_ptr_sub() cleanup of evaluate_assign_op() clean up the typechecking in arithmetics clean up usual_conversions(), kill evaluate_shift() fix index conversions in evaluate_ptr_add() fix default argument promotion move degenerate() down into compatible_assignment_types() in case of compound literal we want to delay examining type warn on return <void _expression_>; deal with enum members without excessive PITA implement __builtin_offsetof() fix handling of integer constant expressions fix the comma handling in integer constant expressions first pass at null pointer constants make size_t better approximate the reality fix handling of address_space in casts and assignments fix handling of pointers in ?: saner show_type() clean up evaluate_sign() integer_promotions() can't get SYM_NODE or SYM_ENUM start cleaning type_difference() get compatible_assignment_types() deal with all cases fix the sanity check in evaluate_ptr_sub() rewrite type_difference() deal correctly with qualifiers on arrays add __builtin_strlen() no such thing as array of functions new helper: unfoul() handling of typeof in evaluate_member_dereference() file and global scopes are the same for purposes of struct redefining ...,array should degenerate sanitize evaluate_ptr_add(), start checking for pointers to functions fix evaluate_compare() sanitize evaluate_postop() saner -Wtypesign braino in conditional_expression() Alberto Bertogli (1): Implement x86-64 support in cgcc. Alexey Dobriyan (2): Fix infinite loop in free_preprocessor_line() Fix -E handling Christopher Li (2): combinations string clean up Pass a bitmask of keywords to handle_attributes Damien Lespiau (6): Change sparse homepage in ctags headers. __DATE__ & __TIME expansion Beautify all & install Makefile targets test-suite: a tiny test automation script test-suite documentation Sample test-suite test cases Dan Sheridan (2): Improved graph generation using subgraph clusters for functions Add gvpr-based post-processing for graphs Josh Triplett (118): Fix website and repository references in FAQ Fix the version number Remove old version note. gitweb lives at git.kernel.org now. Add a "make dist" that requires $(VERSION) to match `git describe` Add test case for __asm__ __volatile__(...) Make cgcc not pass -Wall to sparse even if passing it to cc Teach cgcc about all currently existing sparse warning options Teach cgcc about -ventry and -vdead Parse asm after a label as a statement, not an attribute Add test case for stdcall and cdecl attributes. Add -Wno-old-initializer to turn off warnings about non-C99 struct initializers Add test case for -Wno-old-initializer Revert unintentional inclusion of warning fix in previous commit. Use %td when printing a ptrdiff_t to avoid problems on 64-bit platforms Remove extra space. Add shebang to gvpr scripts, make them executable, and change usage accordingly Fix an __attribute__() parsing error Expand calling convention test case to cover fastcall Add -Wno-non-pointer-null to turn off warning about using a plain integer as a NULL pointer Add __builtin_strcat and __builtin_strncat. Ignore the GCC constructor and destructor attributes Remove inaccurate comment designating some attributes as windows-specific. Move the ident for defined() into the preprocessor section. Reorganize attribute list for readability. Add double-underscore variant __always_inline__. Add double-underscore variant __noinline__. Add no-double-underscore variant "used", ignored like "__used__". Add double-underscore variant __syscall_linkage__. Add no-double-underscore variant format_arg. Add explanatory comment about direct use of __IDENT for preprocessor idents. Sparse always defines __STDC__ 1, so cgcc does not need to do so Fix old typo: s/wierd/weird/ Canonicalize URL in FAQ: add www., add trailing slash Change "LD" to "LINK" in Makefile prettyprinting. Makefile prettyprinting: make INSTALL and other output line up correctly Add test case for infinite loop in free_preprocessor_line() Turn on -Wdecl by default. ctags: Use const as appropriate in cmp_sym() validation/old-initializer.c: Make the_s static to avoid extraneous warning. validation/restricted-typeof.c: Make globals static to avoid extraneous warnings. validation/escapes.c: Make globals static to avoid extraneous warnings. validation/non-pointer-null.c: Make global static to avoid extraneous warning. Merge commit 'viro/integer-constant' Move all the preprocessor tests into validation/preprocessor/ Move test-suite output files to validation/.gitignore .gitignore: Stop ignoring all dotfiles validation: Update comments for current Sparse behavior and test-suite. Add test-suite comments to all the obvious preprocessor tests Make preprocessor-loop a normal numbered preprocessor test Add test-suite comment to preprocessor21. Add test-suite comment to address_space.c Make clean depend on clean-check Rename asm-volatile to better describe what it tests Add test-suite comment to label-asm.c Remove "check-exit-value: 0" and rely on default; remove extra blank line. Add test-suite comment to bad-array-designated-initializer.c Add c2xml to .gitignore Split c2xml build rule into compile and link stages, and add the quiet prefixes _expression_.h needs lib.h for struct position and symbol.h for int_ctype Fix GCC warnings in c2xml Fix sparse warnings in c2xml: mark globals static and remove unused globals Fix test-suite to handle stdout and stderr separately, and fix up tests Add test-suite metadata to bad-cast.c Add test-suite metadata to bad-ternary-cond.c, and remove now-redundant comment Add test-suite metadata to initializer-entry-defined-twice.c Add test-suite metadata to context.c Add test-suite metadata to escapes.c Add test-suite metadata to calling-convention-attributes.c Fix typos in test-suite documentation Makefile: stop cleaning files we didn't make and have no business cleaning Add test-suite metadata to old-initializer.c; also test with -Wno-initializer allocate.h: Stop needlessly returning a void value in __DO_ALLOCATOR Turn off -Wdo-while by default. Add test-suite metadata to label-attr.c validation/builtin_safe1.c: Show the unsafe macro argument Make "Initializer entry defined twice" a warning, not an error Remove explicit restatements of defaults in metadata for member_of_typeof test Remove explicit restatements of defaults in metadata for outer-scope test Remove explicit restatements of defaults in metadata for comma test Add test case for comparing null pointer constant to int. Makefile: Use -O2 -finline-functions, not just -O cse: Size insn_hash_table more realistically, speeding up CSE significantly Add some missing dependencies in the Makefile Drop -fpic; it hurts performance and we don't build libsparse.so by default Add another test case to validation/comma.c ctags: Handle some new namespaces and symbol types. is_zero_constant: declare saved const Add test case for -Wtypesign Sort warning options in lib.c and lib.h Rename Wcast_to_address_space to Wcast_to_as to match the command-line argument Add a manpage for sparse Install the Sparse manpage cgcc: Sparse accepts -Wcast-to-as, not -Wcast-to-address-space Rename Wundefined_preprocessor to Wundef to match the command-line argument cgcc: Sparse accepts -Wundef, not -Wundefined-preprocessor Use -fno-strict-aliasing, as the ptrlist code seems to violate C99 strict aliasing rules Add test-suite annotations to restricted-typeof.c Add test-suite annotations to double-semicolon.c Add test-suite annotations to check_byte_count-ice.c Add test-suite annotations to badtype4.c Add test-suite annotations to varargs1.c Add test-suite annotations to struct-attribute-placement.c Add test-suite annotations to non-pointer-null.c Add test-suite annotations to struct-ns1.c Add test-suite annotations to noderef.c Makefile: Use ?= to allow overriding OS or AR on the Make command line FAQ: Point to URL on vger for subscription instructions and archives README: recode from ISO-8859-1 to UTF-8 validation: Rename typeconvert.c to integer-promotions.c to match its purpose Add test-suite annotations to integer-promotions.c Add test-suite annotations to cond_expr.c Add test-suite annotations to function-pointer-modifier-inheritance.c validation: Update comment in type1.c to reflect current state of Sparse Add test-suite annotations to init-char-array.c Add a manpage for cgcc Add SEE ALSO for cgcc in sparse manpage Makefile: VERSION=0.4 Kovarththanan Rajaratnam (1): libxml compile fix on Cygwin Michael Stefaniuc (3): Ignore the cdecl and stdcall attributes for now. Add test for typedef on pointer to function with stdcall attribute. '\?' is a valid escape character defined by ANSI C. Its value is '?'. Mike Frysinger (1): Makefile: improve flag handling Pavel Roskin (5): Improve error message if using a member of an incomplete struct or union Bitfield without explicit sign should be a warning, not an error cgcc: preserve sparse exit code if -no-compile is used Avoid use of libc headers in the validation suite Fix warnings about undeclared globals, they are irrelevant to the test Ramsay Jones (2): Add (more) support for WIN32 attribute names Add cygwin support to cgcc Randy Dunlap (1): add __builtin_labs() Rob Taylor (4): add end position to symbols add sparse_keep_tokens api to lib.h new get_type_name function add c2xml program Yura Pakhuchiy (1): Make cgcc filter out all sparse warning related options rickn...@student.ltu.se (4): tokenize.c: Replace handwritten strncmp with existing function. _expression_.c: Clean up match_oplist() and add missing va_end() parse.c: Adding va_end(). tokenize.c: Simplify drop_stream_eoln(). -- Josh Triplett Posted Sat Sep 15 14:09:29 2007 Sparse 0.3 released I have tagged and tarballed a 0.3 release of Sparse, now available from http://kernel.org/pub/software/devel/sparse/dist/sparse-0.3.tar.gz, with sha1sum 1d868b29234176abd5f3f5463aad1f11d5268dc2. Note that the Sparse Git repository has moved to: git://git.kernel.org/pub/scm/devel/sparse/sparse.git The old repository location will continue to work for now, but please update any references you have to the old location. Thanks to Christopher Li for contributing heavily to this release, including several notable new features. See the full changelog for details. In addition to numerous bug fixes, cleanups, and new test cases, this release includes several new visible features: A Sparse-based implementation of ctags, thanks to Christopher Li. Now you can have a ctags that actually parses C. Sparse now correctly supports annotations on inline functions. The new -ventry option will make Sparse dump its internal linearized bytecode format. Sparse now parses the __regparm__ attribute just like regparm, fixing a warning with pthreads from glibc 2.5. Sparse now interprets the integer size attributes QI, SI, HI, and DI, and their double-underscore variants. Sparse now supports attributes on labels, sometimes used to specify unused labels. Sparse now handles structure attributes between the structure keyword and the name, fixing many parse errors. Sparse now supports more than one command-line include file. The pkg-config file gets installed to its correct location under lib, rather than under share. Notable internal changes: Fully table-driven attribute parsing. This simplifies the C parser and makes it far easier to add new attributes to Sparse. Many internal cleanups, more information preserved for backends, more useful formats for that information, and lower memory usage. Fixed Sparse warnings about itself. Full changelog: Christopher Li (24): Sparse-based Ctags implementation Change the symbol access list to a pseudo list Add instruction to pseudo user tracking. Update usage chain for dead instructions Update usage chain for dead branch instruction. Allow more than one command line include file. Enhance debug information. Another attempt to fix the attribute parsing. Marking anonymous string. Bug fix in pointer modifier inheritance at function degeneration. Handle structure attributes between the structure keyword and the name Fix the segfault when initializer has unknown symbol Fix double semicolon in struct declaration Make the ptrlist using the sparse allocator. Fix core dump on anonymous symbol. Fix a bug that match_idents forget to end with NULL Adding debug option for showing the linearized instruction. Fix core dump on huge switch Introduce expression_error Disable liveness "dead" instruction by default. Add annotation for inline function call. Introduce keyword driven attribute parsing Fix the annotated inline call position handle label attributes Christopher Li and Josh Triplett (4): Introduce top level parsing for asm parsing. Introducing statement keywords Free up some special bits in modifiers. Moving statement parsing into smaller functions. James Westby (2): Fix mistaken comparison that becomes a no-op. Update the information in README about using the library. Josh Triplett (30): Add ctags to .gitignore Add a return in the last case of a switch; redundant but less error-prone. Coding style fix: in a pointer type, * goes with the name, not the type. Add missing #include "allocate.h" in linearize.h for DECLARE_ALLOCATOR. Add test case for function pointer modifier inheritance Add test case for structure attribute placement. Add test case for double semicolon in structure declaration. Coding style fix: use parentheses with sizeof Move pkg-config file to lib, rather than share Add static to declarations in test cases, to remove unrelated warnings. Fix typo in symbol.h: s/keywrods/keywords/ Fix typos in comments Use GCC format and sentinel attributes on appropriate functions Fix two potential NULL pointer dereferences in dissect.c Avoid returning an uninitialized pointer from dup_list of an empty list Remove stray space from expand_compare in expand.c Prevent potential NULL pointer dereference in expand_compare Add test case for basic address_space annotations. Use noreturn on die() and error_die() Parse and ignore the __regparm__ attribute, just like regparm. Fix comment to reference #weak_define rather than #ifndef, matching code Teach cgcc about -Wtransparent-union and -Wno-transparent-union Declare die_if_error extern in lib.h Remove unused variable "include" from lib.c Declare do_error static Declare gcc_patchlevel extern in lib.h compile-i386.c: Declare regs_in_use static simplify.c: Declare delete_pseudo_user_list_entry static linearize: DECLARE_ALLOCATOR for asm_constraint and asm_rules Fix most -Wshadow warnings in Sparse. Oleg Nesterov (3): dissect: cleanup report_implicit() dissect: fix multidimensional array initializer dissect: simplify lookup_member() -- Josh Triplett Posted Tue May 1 13:55:48 2007 Sparse in Google Summer of Code 2007 Google has accepted Sparse as a mentoring organization for Summer of Code 2007. Interested students can propose work on Sparse-related projects, work on those projects over the summer, and receive a stipend from Google for their work. Student application deadline: March 24th Sparse, the semantic parser, provides a compiler frontend capable of parsing most of ANSI C as well as many GCC extensions, and a collection of sample compiler backends, including a static analyzer also called 'sparse'. Sparse provides a set of annotations designed to convey semantic information about types, such as what address space pointers point to, or what locks a function acquires or releases. The Linux kernel community uses Sparse to check for common errors in kernel source code. Other projects, such as X.org, have begun to use Sparse as well. Working on a Sparse project gives students the opportunity to put many core CS skills into practice on a real-world compiler and static analyzer, and gain some recognition within the prominent community of Free and Open Source Software developers working on the Linux kernel. You can see the current Summer of Code project list for Sparse, or propose an idea of your own. Students need to apply by March 24th. You can apply at http://code.google.com/soc. Any Sparse developers interested in mentoring projects over the summer (which primarily consists of answering questions about Sparse, such as on the mailing list), please apply via the Google Summer of Code mentorship application at http://code.google.com/soc/mentor.html, and check the "Sparse" box. Please also mail me with details. Any Linux developers interested in seeing Sparse do something that it can't currently do, please propose possible Summer of Code projects as soon as you can, and I'll add them to the SoC project page. -- Josh Triplett Posted Tue Mar 20 16:59:36 2007 Sparse 0.2 released I have tagged and tarballed a 0.2 release of Sparse, now available from http://kernel.org/pub/linux/kernel/people/josh/sparse/dist/sparse-0.2.tar.gz, with sha1sum 1762fc609fe436e74b87356a52690b5f7bb40c81. In addition to plenty of bug fixes, this release includes several notable new features: -Wall, thanks to Pavel Roskin #strong_define and #strong_undef, thanks to Oleg Nesterov Argument parsing functions no longer mangle the argv passed to them, thanks to Christopher Li static library and header files now installed, along with a pkg-config file to find them Makefile now supports DESTDIR, useful for packagers Full changelog: Christopher Li (4): trivial fix for seg fault. Fix warning on self check. delay removing file scope cleanup write to argument array hack Damien Lespiau (1): trivial: more .gitignore stuff Josh Triplett (5): Update the FAQ: add sparse website and gitweb, update git URL, remove old BK url Rename "check.c" to "sparse.c" to match program name; update .gitignore Install static library and header files Generate and install a pkg-config file. Add DESTDIR support to Makefile. Remove old SCCS target from Makefile. Nicolas Kaiser (1): double inclusions Oleg Nesterov (7): use lookup_macro() in handle_undef() kill NS_INVISIBLEMACRO, introduce NS_UNDEF fix redefine of #weak_define fix 'weak' attribute loss prepare for #strong_{define,undef} implement #strong_define implement #strong_undef Pavel Roskin (1): Support -Wall flag -- Josh Triplett Posted Tue Dec 5 03:47:48 2006 Sparse 0.1 released I have tagged and tarballed a 0.1 release of Sparse, now available from http://kernel.org/pub/linux/kernel/people/josh/sparse/dist/sparse-0.1.tar.gz, with sha1sum 9e0a4d5abb8e8a4be4cf8d9fe632c69dbec3e242. As discussed in http://marc.theaimsgroup.com/?i=pine.lnx.4.64.0610311030370.25...@g5.osdl.org, I've taken maintainership of sparse. Thanks to Linus Torvalds for his previous maintainership. As a result, this release comes from my sparse Git repository. You can find more information about obtaining sparse via Git at the new sparse homepage. In addition to all the work in the previous Sparse repository (pub/scm/devel/sparse/sparse.git), this release includes the following changes: Adam DiCarlo (1): Add type information to enum mismatch warning Al Viro (2): added a bunch of gcc builtins switch to hash-based get_one_special() Josh Triplett (15): "Initializer entry defined twice" should not trigger with zero-size fields Fix incorrect symbol in comment on #endif for multiple-inclusion guard Add -Wno-uninitialized graph: Show position in basic block nodes bb_terminated: Use boundary values rather than specific opcodes Turn on -Wcontext by default Merge branch 'fix-defined-twice-error-on-empty-struct' into staging Merge branch 'graph' into staging merge branch 'more-warning-flags' into staging and fix conflicts merge branch 'no-semantic-h' into staging and fix conflicts Merge branch 'Wcontext-default' into staging Add test cases to validation/context.c for the Linux __cond_lock macro Merge branch 'context-test-cases-for-cond-lock' into josh Rename test case bad-assignement.c to bad-assignment.c, fixing the typo. Stop building and installing libsparse.so Josh Triplett and Pavel Roskin (1): Recognize and ignore __alias__ and __visibility__ Pavel Roskin (4): Compile sparse executable under it's own name, not as "check" Add support for __builtin_strpbrk() Typo fixes Install cgcc on "make install", refactor installation code Known issue with this release: Sparse does not produce the expected set of warnings for several of the validation programs, included in the sparse source in the directory validation/. Some scripts should provoke warnings but don't, and others provoke warnings they shouldn't. -- Josh Triplett Posted Mon Nov 6 21:43:41 2006 Links: index Last edited Mon Nov 6 14:31:14 2006