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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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src/llvm_backend_const.cpp
+37 -4
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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 = {};