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add config option for changing cond splitting behavior (#522)

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This commit is contained in:
water111
2021-05-24 19:52:19 -04:00
committed by GitHub
parent d719bf5677
commit 0f0902eabf
15 changed files with 115 additions and 46 deletions
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decompiler/ObjectFile/ObjectFileDB_IR2.cpp
+19 -7
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@@ -34,7 +34,7 @@ void ObjectFileDB::analyze_functions_ir2(const std::string& output_dir, const Co
lg::info("Processing top-level functions...");
ir2_top_level_pass(config);
lg::info("Processing basic blocks and control flow graph...");
ir2_basic_block_pass();
ir2_basic_block_pass(config);
lg::info("Finding stack spills...");
ir2_stack_spill_slot_pass();
lg::info("Converting to atomic ops...");
@@ -63,7 +63,7 @@ void ObjectFileDB::analyze_functions_ir2(const std::string& output_dir, const Co
if (!output_dir.empty()) {
lg::info("Writing results...");
ir2_write_results(output_dir);
ir2_write_results(output_dir, config);
}
}
@@ -168,7 +168,7 @@ void ObjectFileDB::ir2_top_level_pass(const Config& config) {
* - Analyze prologue and epilogue
* - Build control flow graph
*/
void ObjectFileDB::ir2_basic_block_pass() {
void ObjectFileDB::ir2_basic_block_pass(const Config& config) {
Timer timer;
// Main Pass over each function...
int total_basic_blocks = 0;
@@ -206,7 +206,13 @@ void ObjectFileDB::ir2_basic_block_pass() {
// run analysis
// build a control flow graph, just looking at branch instructions.
func.cfg = build_cfg(data.linked_data, segment_id, func);
CondWithElseLengthHack hack;
auto lookup =
config.hacks.cond_with_else_len_by_func_name.find(func.guessed_name.to_string());
if (lookup != config.hacks.cond_with_else_len_by_func_name.end()) {
hack = lookup->second;
}
func.cfg = build_cfg(data.linked_data, segment_id, func, hack);
if (!func.cfg->is_fully_resolved()) {
lg::warn("Function {} from {} failed to build control flow graph!",
func.guessed_name.to_string(), data.to_unique_name());
@@ -543,7 +549,7 @@ void ObjectFileDB::ir2_insert_anonymous_functions() {
lg::info("Inserted {} anonymous functions in {:.2f} ms\n", total, timer.getMs());
}
void ObjectFileDB::ir2_write_results(const std::string& output_dir) {
void ObjectFileDB::ir2_write_results(const std::string& output_dir, const Config& config) {
Timer timer;
lg::info("Writing IR2 results to file...");
int total_files = 0;
@@ -552,7 +558,7 @@ void ObjectFileDB::ir2_write_results(const std::string& output_dir) {
if (obj.linked_data.has_any_functions()) {
// todo
total_files++;
auto file_text = ir2_to_file(obj);
auto file_text = ir2_to_file(obj, config);
total_bytes += file_text.length();
auto file_name = file_util::combine_path(output_dir, obj.to_unique_name() + "_ir2.asm");
file_util::write_text_file(file_name, file_text);
@@ -566,7 +572,7 @@ void ObjectFileDB::ir2_write_results(const std::string& output_dir) {
timer.getMs());
}
std::string ObjectFileDB::ir2_to_file(ObjectFileData& data) {
std::string ObjectFileDB::ir2_to_file(ObjectFileData& data, const Config& config) {
std::string result;
const char* segment_names[] = {"main segment", "debug segment", "top-level segment"};
@@ -627,6 +633,12 @@ std::string ObjectFileDB::ir2_to_file(ObjectFileData& data) {
}
}
// print if it exists, even if it's not okay.
if (config.print_cfgs && func.cfg) {
result += fmt::format("Control Flow Graph:\n{}\n\n",
pretty_print::to_string(func.cfg->to_form()));
}
if (false && func.ir2.print_debug_forms) {
result += '\n';
result += ";; DEBUG OUTPUT BELOW THIS LINE:\n";