f65f63c4d8
This patch: - adds support to the analyzer for tracking API-private state or which we don't have a decl (such as strtok's internal state), - uses it to implement a new -Wanalyzer-undefined-behavior-strtok which warns when strtok (NULL, delim) is called as the first call to strtok after main. gcc/analyzer/ChangeLog: PR analyzer/107573 * analyzer.h (register_known_functions): Add region_model_manager param. * analyzer.opt (Wanalyzer-undefined-behavior-strtok): New. * call-summary.cc (call_summary_replay::convert_region_from_summary_1): Handle RK_PRIVATE. * engine.cc (impl_run_checkers): Pass model manager to register_known_functions. * kf.cc (class undefined_function_behavior): New. (class kf_strtok): New. (register_known_functions): Add region_model_manager param. Use it to register "strtok". * region-model-manager.cc (region_model_manager::get_or_create_conjured_svalue): Add "idx" param. * region-model-manager.h (region_model_manager::get_or_create_conjured_svalue): Add "idx" param. (region_model_manager::get_root_region): New accessor. * region-model.cc (region_model::scan_for_null_terminator): Handle "expr" being null. (region_model::get_representative_path_var_1): Handle RK_PRIVATE. * region-model.h (region_model::called_from_main_p): Make public. * region.cc (region::get_memory_space): Handle RK_PRIVATE. (region::can_have_initial_svalue_p): Handle MEMSPACE_PRIVATE. (private_region::dump_to_pp): New. * region.h (MEMSPACE_PRIVATE): New. (RK_PRIVATE): New. (class private_region): New. (is_a_helper <const private_region *>::test): New. * store.cc (store::replay_call_summary_cluster): Handle RK_PRIVATE. * svalue.h (struct conjured_svalue::key_t): Add "idx" param to ctor and "m_idx" field. (class conjured_svalue::conjured_svalue): Likewise. gcc/ChangeLog: PR analyzer/107573 * doc/invoke.texi: Add -Wanalyzer-undefined-behavior-strtok. gcc/testsuite/ChangeLog: PR analyzer/107573 * c-c++-common/analyzer/strtok-1.c: New test. * c-c++-common/analyzer/strtok-2.c: New test. * c-c++-common/analyzer/strtok-3.c: New test. * c-c++-common/analyzer/strtok-4.c: New test. * c-c++-common/analyzer/strtok-cppreference.c: New test. Signed-off-by: David Malcolm <dmalcolm@redhat.com> |
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| c++tools | ||
| config | ||
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| fixincludes | ||
| gcc | ||
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| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
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