diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 7e829ef1408..2deef725620 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -4962,6 +4962,24 @@ expand_builtin_alloca (tree exp) return result; } +/* Emit a call to __asan_allocas_unpoison call in EXP. Replace second argument + of the call with virtual_stack_dynamic_rtx because in asan pass we emit a + dummy value into second parameter relying on this function to perform the + change. See motivation for this in comment to handle_builtin_stack_restore + function. */ + +static rtx +expand_asan_emit_allocas_unpoison (tree exp) +{ + tree arg0 = CALL_EXPR_ARG (exp, 0); + rtx top = expand_expr (arg0, NULL_RTX, ptr_mode, EXPAND_NORMAL); + rtx bot = convert_memory_address (ptr_mode, virtual_stack_dynamic_rtx); + rtx ret = init_one_libfunc ("__asan_allocas_unpoison"); + ret = emit_library_call_value (ret, NULL_RTX, LCT_NORMAL, ptr_mode, 2, top, + ptr_mode, bot, ptr_mode); + return ret; +} + /* Expand a call to bswap builtin in EXP. Return NULL_RTX if a normal call should be emitted rather than expanding the function in-line. If convenient, the result should be placed in TARGET. @@ -6763,6 +6781,9 @@ expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode, return target; break; + case BUILT_IN_ASAN_ALLOCAS_UNPOISON: + return expand_asan_emit_allocas_unpoison (exp); + case BUILT_IN_STACK_SAVE: return expand_stack_save (); @@ -8739,13 +8760,12 @@ fold_builtin_FILE (location_t loc) static inline tree fold_builtin_FUNCTION () { + const char *name = ""; + if (current_function_decl) - { - const char *name = IDENTIFIER_POINTER (DECL_NAME (current_function_decl)); - return build_string_literal (strlen (name) + 1, name); - } + name = lang_hooks.decl_printable_name (current_function_decl, 0); - return build_string_literal (1, ""); + return build_string_literal (strlen (name) + 1, name); } /* Fold a call to __builtin_LINE to an integer constant. */ |