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Add -obfuscate-source-code-locations

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This commit is contained in:
gingerBill
2023-12-13 16:47:34 +00:00
parent 6e9e469abd
commit ca2b2c498e
5 changed files with 68 additions and 7 deletions
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2
src/build_settings.cpp
View File

@@ -381,6 +381,8 @@ struct BuildContext {
bool dynamic_map_calls;
bool obfuscate_source_code_locations;
RelocMode reloc_mode;
bool disable_red_zone;

41
src/llvm_backend_const.cpp
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@@ -287,11 +287,44 @@ gb_internal lbValue lb_expr_untyped_const_to_typed(lbModule *m, Ast *expr, Type
return lb_const_value(m, t, tv.value);
}
gb_internal lbValue lb_const_source_code_location_const(lbModule *m, String const &procedure, TokenPos const &pos) {
gb_internal String lb_obfuscate_string(String const &s, char const *prefix) {
if (s.len == 0) {
return {};
}
GB_ASSERT(prefix != nullptr);
u64 hash = gb_fnv64a(s.text, s.len);
gbString res = gb_string_make(temporary_allocator(), prefix);
res = gb_string_append_fmt(res, "x%llx", cast(long long unsigned)hash);
return make_string_c(res);
}
gb_internal i32 lb_obfuscate_i32(i32 i) {
i32 x = cast(i32)gb_fnv64a(&i, sizeof(i));
if (x < 0) {
x = 1-x;
}
return cast(i32)x;
}
gb_internal lbValue lb_const_source_code_location_const(lbModule *m, String const &procedure_, TokenPos const &pos) {
String file = get_file_path_string(pos.file_id);
String procedure = procedure_;
i32 line = pos.line;
i32 column = pos.column;
if (build_context.obfuscate_source_code_locations) {
file = lb_obfuscate_string(file, "F");
procedure = lb_obfuscate_string(procedure, "P");
line = lb_obfuscate_i32(line);
column = lb_obfuscate_i32(column);
}
LLVMValueRef fields[4] = {};
fields[0]/*file*/ = lb_find_or_add_entity_string(m, get_file_path_string(pos.file_id)).value;
fields[1]/*line*/ = lb_const_int(m, t_i32, pos.line).value;
fields[2]/*column*/ = lb_const_int(m, t_i32, pos.column).value;
fields[0]/*file*/ = lb_find_or_add_entity_string(m, file).value;
fields[1]/*line*/ = lb_const_int(m, t_i32, line).value;
fields[2]/*column*/ = lb_const_int(m, t_i32, column).value;
fields[3]/*procedure*/ = lb_find_or_add_entity_string(m, procedure).value;
lbValue res = {};

12
src/main.cpp
View File

@@ -277,6 +277,7 @@ enum BuildFlagKind {
BuildFlag_ForeignErrorProcedures,
BuildFlag_NoRTTI,
BuildFlag_DynamicMapCalls,
BuildFlag_ObfuscateSourceCodeLocations,
BuildFlag_Compact,
BuildFlag_GlobalDefinitions,
@@ -467,6 +468,8 @@ gb_internal bool parse_build_flags(Array<String> args) {
add_flag(&build_flags, BuildFlag_DynamicMapCalls, str_lit("dynamic-map-calls"), BuildFlagParam_None, Command__does_check);
add_flag(&build_flags, BuildFlag_ObfuscateSourceCodeLocations, str_lit("obfuscate-source-code-locations"), BuildFlagParam_None, Command__does_build);
add_flag(&build_flags, BuildFlag_Short, str_lit("short"), BuildFlagParam_None, Command_doc);
add_flag(&build_flags, BuildFlag_AllPackages, str_lit("all-packages"), BuildFlagParam_None, Command_doc);
add_flag(&build_flags, BuildFlag_DocFormat, str_lit("doc-format"), BuildFlagParam_None, Command_doc);
@@ -1113,6 +1116,11 @@ gb_internal bool parse_build_flags(Array<String> args) {
case BuildFlag_DynamicMapCalls:
build_context.dynamic_map_calls = true;
break;
case BuildFlag_ObfuscateSourceCodeLocations:
build_context.obfuscate_source_code_locations = true;
break;
case BuildFlag_DefaultToNilAllocator:
build_context.ODIN_DEFAULT_TO_NIL_ALLOCATOR = true;
break;
@@ -1947,6 +1955,10 @@ gb_internal void print_show_help(String const arg0, String const &command) {
}
if (run_or_build) {
print_usage_line(1, "-obfuscate-source-code-locations");
print_usage_line(2, "Obfuscate the file and procedure strings, and line and column numbers, stored with a 'runtime.Source_Code_Location' value.");
print_usage_line(0, "");
print_usage_line(1, "-sanitize:<string>");
print_usage_line(2, "Enables sanitization analysis.");
print_usage_line(2, "Available options:");

11
src/tilde_stmt.cpp
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@@ -1982,16 +1982,25 @@ gb_internal bool cg_switch_stmt_can_be_trivial_jump_table(AstSwitchStmt *ss) {
if (ss->tag == nullptr) {
return false;
}
enum { DISALLOW_64_SWITCH = true };
bool is_typeid = false;
TypeAndValue tv = type_and_value_of_expr(ss->tag);
if (is_type_integer(core_type(tv.type))) {
if (type_size_of(tv.type) > 8) {
i64 sz = type_size_of(tv.type);
if (sz > 8) {
return false;
}
if (DISALLOW_64_SWITCH && sz == 8) {
return false;
}
// okay
} else if (is_type_typeid(tv.type)) {
// okay
is_typeid = true;
if (DISALLOW_64_SWITCH && build_context.ptr_size == 8) {
return false;
}
} else {
return false;
}

9
src/tilde_type_info.cpp
View File

@@ -475,6 +475,13 @@ gb_internal void cg_setup_type_info_data(cgModule *m) {
// }
tag_type = t_type_info_named;
i64 name_offset = type_offset_of(tag_type, 0);
String name = t->Named.type_name->token.string;
cg_global_const_string(m, name, t_string, global, offset+name_offset);
i64 base_offset = type_offset_of(tag_type, 1);
cg_global_const_type_info_ptr(m, t->Named.base, global, offset+base_offset);
if (t->Named.type_name->pkg) {
i64 pkg_offset = type_offset_of(tag_type, 2);
String pkg_name = t->Named.type_name->pkg->name;
@@ -495,8 +502,6 @@ gb_internal void cg_setup_type_info_data(cgModule *m) {
TokenPos pos = t->Named.type_name->token.pos;
cg_global_source_code_location_const(m, proc_name, pos, global, offset+loc_offset);
i64 base_offset = type_offset_of(tag_type, 1);
cg_global_const_type_info_ptr(m, t->Named.base, global, offset+base_offset);
break;
}