diff options
Diffstat (limited to 'gcc/analyzer/region-model.cc')
| -rw-r--r-- | gcc/analyzer/region-model.cc | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc index edf3412a817..0ca454a0f9c 100644 --- a/gcc/analyzer/region-model.cc +++ b/gcc/analyzer/region-model.cc @@ -2223,7 +2223,7 @@ region_model::on_call_pre (const gcall *call, region_model_context *ctxt, case BUILT_IN_REALLOC: return false; case BUILT_IN_STRCHR: - impl_call_strchr (cd); + /* Handle in "on_call_post". */ return false; case BUILT_IN_STRCPY: case BUILT_IN_STRCPY_CHK: @@ -2288,6 +2288,11 @@ region_model::on_call_pre (const gcall *call, region_model_context *ctxt, impl_call_realloc (cd); return false; } + else if (is_named_call_p (callee_fndecl, "__errno_location", call, 0)) + { + impl_call_errno_location (cd); + return false; + } else if (is_named_call_p (callee_fndecl, "error")) { if (impl_call_error (cd, 3, out_terminate_path)) @@ -2341,7 +2346,7 @@ region_model::on_call_pre (const gcall *call, region_model_context *ctxt, else if (is_named_call_p (callee_fndecl, "strchr", call, 2) && POINTER_TYPE_P (cd.get_arg_type (0))) { - impl_call_strchr (cd); + /* Handle in "on_call_post". */ return false; } else if (is_named_call_p (callee_fndecl, "strlen", call, 1) @@ -2418,6 +2423,12 @@ region_model::on_call_post (const gcall *call, impl_call_pipe (cd); return; } + else if (is_named_call_p (callee_fndecl, "strchr", call, 2) + && POINTER_TYPE_P (cd.get_arg_type (0))) + { + impl_call_strchr (cd); + return; + } /* Was this fndecl referenced by __attribute__((malloc(FOO)))? */ if (lookup_attribute ("*dealloc", DECL_ATTRIBUTES (callee_fndecl))) @@ -2435,6 +2446,10 @@ region_model::on_call_post (const gcall *call, impl_call_realloc (cd); return; + case BUILT_IN_STRCHR: + impl_call_strchr (cd); + return; + case BUILT_IN_VA_END: impl_call_va_end (cd); return; @@ -6408,6 +6423,23 @@ region_model::maybe_complain_about_infoleak (const region *dst_reg, copied_sval)); } +/* Set errno to a positive symbolic int, as if some error has occurred. */ + +void +region_model::set_errno (const call_details &cd) +{ + const region *errno_reg = m_mgr->get_errno_region (); + conjured_purge p (this, cd.get_ctxt ()); + const svalue *new_errno_sval + = m_mgr->get_or_create_conjured_svalue (integer_type_node, + cd.get_call_stmt (), + errno_reg, p); + const svalue *zero + = m_mgr->get_or_create_int_cst (integer_type_node, 0); + add_constraint (new_errno_sval, GT_EXPR, zero, cd.get_ctxt ()); + set_value (errno_reg, new_errno_sval, cd.get_ctxt ()); +} + /* class noop_region_model_context : public region_model_context. */ void |