GCC modified for the FreeChainXenon project
84fb354666
This patch provides a new option "-fno-analyzer-feasibility" as a way to disable feasibility-checking of the constraints along the control flow paths for -fanalyzer diagnostics. I'm adding this in the hope of making it easier to debug issues involving the feasibility-checking logic. The patch adds a new rejected_constraint object which is captured if exploded_path::feasible_p fails, and adds logic that uses this to emit an additional custom_event within the checker_path for the diagnostic, showing where in the control flow path the diagnostic would have been rejected, and giving details of why. gcc/analyzer/ChangeLog: * analyzer.h (struct rejected_constraint): New decl. * analyzer.opt (fanalyzer-feasibility): New option. * diagnostic-manager.cc (path_builder::path_builder): Add "problem" param and use it to initialize new field. (path_builder::get_feasibility_problem): New accessor. (path_builder::m_feasibility_problem): New field. (dedupe_winners::add): Remove inversion of logic in "if" clause, swapping if/else suites. In the !feasible_p suite, inspect flag_analyzer_feasibility and add code to handle when this is off, accepting the infeasible path, but recording the feasibility_problem. (diagnostic_manager::emit_saved_diagnostic): Pass the feasibility_problem to the path_builder. (diagnostic_manager::add_events_for_eedge): If we have a feasibility_problem at this edge, use it to add a custom event. * engine.cc (exploded_path::feasible_p): Pass a rejected_constraint ** to model.maybe_update_for_edge and transfer ownership of any created instance to any feasibility_problem. (feasibility_problem::dump_to_pp): New. * exploded-graph.h (feasibility_problem::feasibility_problem): Drop "model" param; add rejected_constraint * param. (feasibility_problem::~feasibility_problem): New. (feasibility_problem::dump_to_pp): New decl. (feasibility_problem::m_model): Drop field. (feasibility_problem::m_rc): New field. * program-point.cc (function_point::get_location): Handle PK_BEFORE_SUPERNODE and PK_AFTER_SUPERNODE. * program-state.cc (program_state::on_edge): Pass NULL to new param of region_model::maybe_update_for_edge. * region-model.cc (region_model::add_constraint): New overload adding a rejected_constraint ** param. (region_model::maybe_update_for_edge): Add rejected_constraint ** param and pass it to the various apply_constraints_for_ calls. (region_model::apply_constraints_for_gcond): Add rejected_constraint ** param and pass it to add_constraint calls. (region_model::apply_constraints_for_gswitch): Likewise. (region_model::apply_constraints_for_exception): Likewise. (rejected_constraint::dump_to_pp): New. * region-model.h (region_model::maybe_update_for_edge): Add rejected_constraint ** param. (region_model::add_constraint): New overload adding a rejected_constraint ** param. (region_model::apply_constraints_for_gcond): Add rejected_constraint ** param. (region_model::apply_constraints_for_gswitch): Likewise. (region_model::apply_constraints_for_exception): Likewise. (struct rejected_constraint): New. gcc/ChangeLog: * doc/analyzer.texi (Analyzer Paths): Add note about -fno-analyzer-feasibility. * doc/invoke.texi (Static Analyzer Options): Add -fno-analyzer-feasibility. gcc/testsuite/ChangeLog: * gcc.dg/analyzer/feasibility-2.c: New test. |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
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