sepcomp: fix hardening related to the instantiation of dead types

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/compiler/separate_compiler.nit b/src/compiler/separate_compiler.nit
index 085a36d..7231bbb 100644 (file)
--- a/src/compiler/separate_compiler.nit
+++ b/src/compiler/separate_compiler.nit
@@ -768,7 +768,8 @@ class SeparateCompiler
                        end
                        v.add_decl("\},")
                else
-                       v.add_decl("0, \{\}, /*DEAD TYPE*/")
+                       # Use -1 to indicate dead type, the info is used by --hardening
+                       v.add_decl("-1, \{\}, /*DEAD TYPE*/")
                end
                v.add_decl("\};")
        end
@@ -1036,7 +1037,7 @@ class SeparateCompiler
                v.add("if({t} == NULL) \{")
                v.add_abort("type null")
                v.add("\}")
-               v.add("if({t}->table_size == 0) \{")
+               v.add("if({t}->table_size < 0) \{")
                v.add("PRINT_ERROR(\"Insantiation of a dead type: %s\\n\", {t}->name);")
                v.add_abort("type dead")
                v.add("\}")