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error.cpp
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error.cpp
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enum ErrorValueKind : u32 {
ErrorValue_Error,
ErrorValue_Warning,
};
struct ErrorValue {
ErrorValueKind kind;
TokenPos pos;
TokenPos end;
Array<u8> msg;
bool seen_newline;
};
struct ErrorCollector {
TokenPos prev;
std::atomic<i64> count;
std::atomic<i64> warning_count;
std::atomic<bool> in_block;
RecursiveMutex mutex;
BlockingMutex path_mutex;
Array<ErrorValue> error_values;
ErrorValue curr_error_value;
std::atomic<bool> curr_error_value_set;
};
gb_global ErrorCollector global_error_collector;
gb_internal void push_error_value(TokenPos const &pos, ErrorValueKind kind = ErrorValue_Error) {
GB_ASSERT_MSG(global_error_collector.curr_error_value_set.load() == false, "Possible race condition in error handling system, please report this with an issue");
ErrorValue ev = {kind, pos};
ev.msg.allocator = heap_allocator();
global_error_collector.curr_error_value = ev;
global_error_collector.curr_error_value_set.store(true);
}
gb_internal void pop_error_value(void) {
mutex_lock(&global_error_collector.mutex);
if (global_error_collector.curr_error_value_set.load()) {
array_add(&global_error_collector.error_values, global_error_collector.curr_error_value);
global_error_collector.curr_error_value = {};
global_error_collector.curr_error_value_set.store(false);
}
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void try_pop_error_value(void) {
if (!global_error_collector.in_block.load()) {
pop_error_value();
}
}
gb_internal ErrorValue *get_error_value(void) {
GB_ASSERT_MSG(global_error_collector.curr_error_value_set.load() == true, "Possible race condition in error handling system, please report this with an issue");
return &global_error_collector.curr_error_value;
}
gb_internal bool any_errors(void) {
return global_error_collector.count.load() != 0;
}
gb_internal bool any_warnings(void) {
return global_error_collector.warning_count.load() != 0;
}
gb_internal void init_global_error_collector(void) {
array_init(&global_error_collector.error_values, heap_allocator());
array_init(&global_file_path_strings, heap_allocator(), 1, 4096);
array_init(&global_files, heap_allocator(), 1, 4096);
}
gb_internal isize MAX_ERROR_COLLECTOR_COUNT(void);
// temporary
// defined in build_settings.cpp
gb_internal char *token_pos_to_string(TokenPos const &pos);
gb_internal bool set_file_path_string(i32 index, String const &path) {
bool ok = false;
GB_ASSERT(index >= 0);
mutex_lock(&global_error_collector.path_mutex);
mutex_lock(&global_files_mutex);
if (index >= global_file_path_strings.count) {
array_resize(&global_file_path_strings, index+1);
}
String prev = global_file_path_strings[index];
if (prev.len == 0) {
global_file_path_strings[index] = path;
ok = true;
}
mutex_unlock(&global_files_mutex);
mutex_unlock(&global_error_collector.path_mutex);
return ok;
}
gb_internal bool thread_safe_set_ast_file_from_id(i32 index, AstFile *file) {
bool ok = false;
GB_ASSERT(index >= 0);
mutex_lock(&global_error_collector.path_mutex);
mutex_lock(&global_files_mutex);
if (index >= global_files.count) {
array_resize(&global_files, index+1);
}
AstFile *prev = global_files[index];
if (prev == nullptr) {
global_files[index] = file;
ok = true;
}
mutex_unlock(&global_files_mutex);
mutex_unlock(&global_error_collector.path_mutex);
return ok;
}
gb_internal String get_file_path_string(i32 index) {
GB_ASSERT(index >= 0);
mutex_lock(&global_error_collector.path_mutex);
mutex_lock(&global_files_mutex);
String path = {};
if (index < global_file_path_strings.count) {
path = global_file_path_strings[index];
}
mutex_unlock(&global_files_mutex);
mutex_unlock(&global_error_collector.path_mutex);
return path;
}
gb_internal AstFile *thread_safe_get_ast_file_from_id(i32 index) {
GB_ASSERT(index >= 0);
mutex_lock(&global_error_collector.path_mutex);
mutex_lock(&global_files_mutex);
AstFile *file = nullptr;
if (index < global_files.count) {
file = global_files[index];
}
mutex_unlock(&global_files_mutex);
mutex_unlock(&global_error_collector.path_mutex);
return file;
}
// NOTE: defined in build_settings.cpp
gb_internal bool global_warnings_as_errors(void);
gb_internal bool global_ignore_warnings(void);
gb_internal bool show_error_line(void);
gb_internal bool terse_errors(void);
gb_internal bool json_errors(void);
gb_internal bool has_ansi_terminal_colours(void);
gb_internal gbString get_file_line_as_string(TokenPos const &pos, i32 *offset);
gb_internal void warning(Token const &token, char const *fmt, ...);
gb_internal void error(Token const &token, char const *fmt, ...);
gb_internal void error(TokenPos pos, char const *fmt, ...);
gb_internal void error_line(char const *fmt, ...);
gb_internal void syntax_error(Token const &token, char const *fmt, ...);
gb_internal void syntax_error(TokenPos pos, char const *fmt, ...);
gb_internal void syntax_warning(Token const &token, char const *fmt, ...);
gb_internal void compiler_error(char const *fmt, ...);
gb_internal void print_all_errors(void);
#define ERROR_OUT_PROC(name) void name(char const *fmt, va_list va)
typedef ERROR_OUT_PROC(ErrorOutProc);
gb_internal ERROR_OUT_PROC(default_error_out_va) {
char buf[4096] = {};
isize len = gb_snprintf_va(buf, gb_size_of(buf), fmt, va);
isize n = len-1;
if (n > 0) {
ErrorValue *ev = get_error_value();
if (terse_errors()) {
for (isize i = 0; i < n && !ev->seen_newline; i++) {
u8 c = cast(u8)buf[i];
if (c == '\n') {
ev->seen_newline = true;
}
array_add(&ev->msg, c);
}
} else {
array_add_elems(&ev->msg, (u8 *)buf, n);
}
}
}
gb_global ErrorOutProc *error_out_va = default_error_out_va;
gb_internal void begin_error_block(void) {
mutex_lock(&global_error_collector.mutex);
global_error_collector.in_block.store(true);
}
gb_internal void end_error_block(void) {
pop_error_value();
global_error_collector.in_block.store(false);
mutex_unlock(&global_error_collector.mutex);
}
#define ERROR_BLOCK() begin_error_block(); defer (end_error_block())
gb_internal void error_out(char const *fmt, ...) {
va_list va;
va_start(va, fmt);
error_out_va(fmt, va);
va_end(va);
}
enum TerminalStyle {
TerminalStyle_Normal,
TerminalStyle_Bold,
TerminalStyle_Underline,
};
enum TerminalColour {
TerminalColour_White,
TerminalColour_Red,
TerminalColour_Yellow,
TerminalColour_Green,
TerminalColour_Cyan,
TerminalColour_Blue,
TerminalColour_Purple,
TerminalColour_Black,
};
gb_internal void terminal_set_colours(TerminalStyle style, TerminalColour foreground) {
if (has_ansi_terminal_colours()) {
char const *ss = "0";
switch (style) {
case TerminalStyle_Normal: ss = "0"; break;
case TerminalStyle_Bold: ss = "1"; break;
case TerminalStyle_Underline: ss = "4"; break;
}
switch (foreground) {
case TerminalColour_White: error_out("\x1b[%s;37m", ss); break;
case TerminalColour_Red: error_out("\x1b[%s;31m", ss); break;
case TerminalColour_Yellow: error_out("\x1b[%s;33m", ss); break;
case TerminalColour_Green: error_out("\x1b[%s;32m", ss); break;
case TerminalColour_Cyan: error_out("\x1b[%s;36m", ss); break;
case TerminalColour_Blue: error_out("\x1b[%s;34m", ss); break;
case TerminalColour_Purple: error_out("\x1b[%s;35m", ss); break;
case TerminalColour_Black: error_out("\x1b[%s;30m", ss); break;
}
}
}
gb_internal void terminal_reset_colours(void) {
if (has_ansi_terminal_colours()) {
error_out("\x1b[0m");
}
}
gb_internal isize show_error_on_line(TokenPos const &pos, TokenPos end, char const *prefix=nullptr) {
get_error_value()->end = end;
if (!show_error_line()) {
return -1;
}
i32 offset = 0;
gbString the_line = get_file_line_as_string(pos, &offset);
defer (gb_string_free(the_line));
if (the_line != nullptr) {
char const *line_text = the_line;
isize line_len = gb_string_length(the_line);
// TODO(bill): This assumes ASCII
enum {
MAX_LINE_LENGTH = 80,
MAX_TAB_WIDTH = 8,
ELLIPSIS_PADDING = 8, // `... ...`
MAX_LINE_LENGTH_PADDED = MAX_LINE_LENGTH-MAX_TAB_WIDTH-ELLIPSIS_PADDING,
};
if (prefix) {
error_out("\t%s\n\n", prefix);
}
error_out("\t");
terminal_set_colours(TerminalStyle_Bold, TerminalColour_White);
i32 error_length = gb_max(end.offset - pos.offset, 1);
isize squiggle_extra = 0;
if (line_len > MAX_LINE_LENGTH_PADDED) {
i32 left = MAX_TAB_WIDTH;
i32 diff = gb_max(offset-left, 0);
if (diff > 0) {
line_text += diff;
line_len -= diff;
offset = left + ELLIPSIS_PADDING/2;
}
if (line_len > MAX_LINE_LENGTH_PADDED) {
line_len = MAX_LINE_LENGTH_PADDED;
if (error_length > line_len-left) {
error_length = cast(i32)line_len - left;
squiggle_extra = 1;
}
}
if (diff > 0) {
error_out("... %.*s ...", cast(i32)line_len, line_text);
} else {
error_out("%.*s ...", cast(i32)line_len, line_text);
}
} else {
error_out("%.*s", cast(i32)line_len, line_text);
}
error_out("\n\t");
for (i32 i = 0; i < offset; i++) {
error_out(" ");
}
terminal_set_colours(TerminalStyle_Bold, TerminalColour_Green);
error_out("^");
if (end.file_id == pos.file_id) {
if (end.line > pos.line) {
for (i32 i = offset; i < line_len; i++) {
error_out("~");
}
} else if (end.line == pos.line && end.column > pos.column) {
for (i32 i = 1; i < error_length-1+squiggle_extra; i++) {
error_out("~");
}
if (error_length > 1 && squiggle_extra == 0) {
error_out("^");
}
}
}
terminal_reset_colours();
error_out("\n");
return offset;
}
return -1;
}
gb_internal void error_out_empty(void) {
error_out("");
}
gb_internal void error_out_pos(TokenPos pos) {
terminal_set_colours(TerminalStyle_Bold, TerminalColour_White);
error_out("%s ", token_pos_to_string(pos));
terminal_reset_colours();
}
gb_internal void error_out_coloured(char const *str, TerminalStyle style, TerminalColour foreground) {
terminal_set_colours(style, foreground);
error_out(str);
terminal_reset_colours();
}
gb_internal void error_va(TokenPos const &pos, TokenPos end, char const *fmt, va_list va) {
global_error_collector.count.fetch_add(1);
if (global_error_collector.count > MAX_ERROR_COLLECTOR_COUNT()) {
print_all_errors();
gb_exit(1);
}
mutex_lock(&global_error_collector.mutex);
push_error_value(pos, ErrorValue_Error);
// NOTE(bill): Duplicate error, skip it
if (pos.line == 0) {
error_out_empty();
error_out_coloured("Error: ", TerminalStyle_Normal, TerminalColour_Red);
error_out_va(fmt, va);
error_out("\n");
} else if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
if (has_ansi_terminal_colours()) {
error_out_coloured("Error: ", TerminalStyle_Normal, TerminalColour_Red);
}
error_out_va(fmt, va);
error_out("\n");
show_error_on_line(pos, end);
} else {
global_error_collector.count.fetch_sub(1);
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void warning_va(TokenPos const &pos, TokenPos end, char const *fmt, va_list va) {
if (global_warnings_as_errors()) {
error_va(pos, end, fmt, va);
return;
}
global_error_collector.warning_count.fetch_add(1);
mutex_lock(&global_error_collector.mutex);
push_error_value(pos, ErrorValue_Warning);
if (!global_ignore_warnings()) {
// NOTE(bill): Duplicate error, skip it
if (pos.line == 0) {
error_out_empty();
error_out_coloured("Warning: ", TerminalStyle_Normal, TerminalColour_Yellow);
error_out_va(fmt, va);
error_out("\n");
} else if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
error_out_coloured("Warning: ", TerminalStyle_Normal, TerminalColour_Yellow);
error_out_va(fmt, va);
error_out("\n");
show_error_on_line(pos, end);
}
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void error_line_va(char const *fmt, va_list va) {
error_out_va(fmt, va);
}
gb_internal void error_no_newline_va(TokenPos const &pos, char const *fmt, va_list va) {
global_error_collector.count.fetch_add(1);
if (global_error_collector.count.load() > MAX_ERROR_COLLECTOR_COUNT()) {
print_all_errors();
gb_exit(1);
}
mutex_lock(&global_error_collector.mutex);
push_error_value(pos, ErrorValue_Error);
// NOTE(bill): Duplicate error, skip it
if (pos.line == 0) {
error_out_empty();
error_out_coloured("Error: ", TerminalStyle_Normal, TerminalColour_Red);
error_out_va(fmt, va);
} else if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
if (has_ansi_terminal_colours()) {
error_out_coloured("Error: ", TerminalStyle_Normal, TerminalColour_Red);
}
error_out_va(fmt, va);
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void syntax_error_va(TokenPos const &pos, TokenPos end, char const *fmt, va_list va) {
global_error_collector.count.fetch_add(1);
if (global_error_collector.count > MAX_ERROR_COLLECTOR_COUNT()) {
print_all_errors();
gb_exit(1);
}
mutex_lock(&global_error_collector.mutex);
push_error_value(pos, ErrorValue_Warning);
// NOTE(bill): Duplicate error, skip it
if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
error_out_coloured("Syntax Error: ", TerminalStyle_Normal, TerminalColour_Red);
error_out_va(fmt, va);
error_out("\n");
show_error_on_line(pos, end);
} else if (pos.line == 0) {
error_out_empty();
error_out_coloured("Syntax Error: ", TerminalStyle_Normal, TerminalColour_Red);
error_out_va(fmt, va);
error_out("\n");
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void syntax_error_with_verbose_va(TokenPos const &pos, TokenPos end, char const *fmt, va_list va) {
global_error_collector.count.fetch_add(1);
if (global_error_collector.count > MAX_ERROR_COLLECTOR_COUNT()) {
print_all_errors();
gb_exit(1);
}
mutex_lock(&global_error_collector.mutex);
push_error_value(pos, ErrorValue_Warning);
// NOTE(bill): Duplicate error, skip it
if (pos.line == 0) {
error_out_empty();
error_out_coloured("Syntax_Error: ", TerminalStyle_Normal, TerminalColour_Red);
error_out_va(fmt, va);
error_out("\n");
} else if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
if (has_ansi_terminal_colours()) {
error_out_coloured("Syntax_Error: ", TerminalStyle_Normal, TerminalColour_Red);
}
error_out_va(fmt, va);
error_out("\n");
show_error_on_line(pos, end);
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void syntax_warning_va(TokenPos const &pos, TokenPos end, char const *fmt, va_list va) {
if (global_warnings_as_errors()) {
syntax_error_va(pos, end, fmt, va);
return;
}
mutex_lock(&global_error_collector.mutex);
global_error_collector.warning_count++;
push_error_value(pos, ErrorValue_Warning);
if (!global_ignore_warnings()) {
// NOTE(bill): Duplicate error, skip it
if (global_error_collector.prev != pos) {
global_error_collector.prev = pos;
if (json_errors()) {
error_out_empty();
} else {
error_out_pos(pos);
}
error_out_coloured("Syntax Warning: ", TerminalStyle_Normal, TerminalColour_Yellow);
error_out_va(fmt, va);
error_out("\n");
// show_error_on_line(pos, end);
} else if (pos.line == 0) {
error_out_empty();
error_out_coloured("Syntax Warning: ", TerminalStyle_Normal, TerminalColour_Yellow);
error_out_va(fmt, va);
error_out("\n");
}
}
try_pop_error_value();
mutex_unlock(&global_error_collector.mutex);
}
gb_internal void warning(Token const &token, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
warning_va(token.pos, {}, fmt, va);
va_end(va);
}
gb_internal void error(Token const &token, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
error_va(token.pos, {}, fmt, va);
va_end(va);
}
gb_internal void error(TokenPos pos, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
Token token = {};
token.pos = pos;
error_va(pos, {}, fmt, va);
va_end(va);
}
gb_internal void error_line(char const *fmt, ...) {
va_list va;
va_start(va, fmt);
error_line_va(fmt, va);
va_end(va);
}
gb_internal void syntax_error(Token const &token, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
syntax_error_va(token.pos, {}, fmt, va);
va_end(va);
}
gb_internal void syntax_error(TokenPos pos, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
syntax_error_va(pos, {}, fmt, va);
va_end(va);
}
gb_internal void syntax_warning(Token const &token, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
syntax_warning_va(token.pos, {}, fmt, va);
va_end(va);
}
gb_internal void syntax_error_with_verbose(TokenPos pos, TokenPos end, char const *fmt, ...) {
va_list va;
va_start(va, fmt);
syntax_error_with_verbose_va(pos, end, fmt, va);
va_end(va);
}
gb_internal void compiler_error(char const *fmt, ...) {
if (any_errors() || any_warnings()) {
print_all_errors();
}
va_list va;
va_start(va, fmt);
gb_printf_err("Internal Compiler Error: %s\n",
gb_bprintf_va(fmt, va));
va_end(va);
GB_DEBUG_TRAP();
gb_exit(1);
}
gb_internal void exit_with_errors(void) {
if (any_errors() || any_warnings()) {
print_all_errors();
}
gb_exit(1);
}
gb_internal int error_value_cmp(void const *a, void const *b) {
ErrorValue *x = cast(ErrorValue *)a;
ErrorValue *y = cast(ErrorValue *)b;
return token_pos_cmp(x->pos, y->pos);
}
gb_internal void print_all_errors(void) {
auto const &escape_char = [](gbString res, u8 c) -> gbString {
switch (c) {
case '\n': res = gb_string_append_length(res, "\\n", 2); break;
case '"': res = gb_string_append_length(res, "\\\"", 2); break;
case '\\': res = gb_string_append_length(res, "\\\\", 2); break;
case '\b': res = gb_string_append_length(res, "\\b", 2); break;
case '\f': res = gb_string_append_length(res, "\\f", 2); break;
case '\r': res = gb_string_append_length(res, "\\r", 2); break;
case '\t': res = gb_string_append_length(res, "\\t", 2); break;
default:
if ('\x00' <= c && c <= '\x1f') {
res = gb_string_append_fmt(res, "\\u%04x", c);
} else {
res = gb_string_append_length(res, &c, 1);
}
break;
}
return res;
};
GB_ASSERT(any_errors() || any_warnings());
array_sort(global_error_collector.error_values, error_value_cmp);
gbString res = gb_string_make(heap_allocator(), "");
defer (gb_string_free(res));
if (json_errors()) {
res = gb_string_append_fmt(res, "{\n");
res = gb_string_append_fmt(res, "\t\"error_count\": %td,\n", global_error_collector.error_values.count);
res = gb_string_append_fmt(res, "\t\"errors\": [\n");
for_array(i, global_error_collector.error_values) {
ErrorValue ev = global_error_collector.error_values[i];
res = gb_string_append_fmt(res, "\t\t{\n");
res = gb_string_append_fmt(res, "\t\t\t\"type\": \"");
if (ev.kind == ErrorValue_Warning) {
res = gb_string_append_fmt(res, "warning");
} else {
res = gb_string_append_fmt(res, "error");
}
res = gb_string_append_fmt(res, "\",\n");
res = gb_string_append_fmt(res, "\t\t\t\"pos\": {\n");
if (ev.pos.file_id) {
res = gb_string_append_fmt(res, "\t\t\t\t\"file\": \"");
String file = get_file_path_string(ev.pos.file_id);
for (isize k = 0; k < file.len; k++) {
res = escape_char(res, file.text[k]);
}
res = gb_string_append_fmt(res, "\",\n");
res = gb_string_append_fmt(res, "\t\t\t\t\"offset\": %d,\n", ev.pos.offset);
res = gb_string_append_fmt(res, "\t\t\t\t\"line\": %d,\n", ev.pos.line);
res = gb_string_append_fmt(res, "\t\t\t\t\"column\": %d,\n", ev.pos.column);
i32 end_column = gb_max(ev.end.column, ev.pos.column);
res = gb_string_append_fmt(res, "\t\t\t\t\"end_column\": %d\n", end_column);
res = gb_string_append_fmt(res, "\t\t\t},\n");
}
res = gb_string_append_fmt(res, "\t\t\t\"msgs\": [\n");
auto lines = split_lines_from_array(ev.msg, heap_allocator());
defer (array_free(&lines));
if (lines.count > 0) {
res = gb_string_append_fmt(res, "\t\t\t\t\"");
for (isize j = 0; j < lines.count; j++) {
String line = lines[j];
for (isize k = 0; k < line.len; k++) {
u8 c = line.text[k];
res = escape_char(res, c);
}
if (j+1 < lines.count) {
res = gb_string_append_fmt(res, "\",\n");
res = gb_string_append_fmt(res, "\t\t\t\t\"");
}
}
res = gb_string_append_fmt(res, "\"\n");
}
res = gb_string_append_fmt(res, "\t\t\t]\n");
res = gb_string_append_fmt(res, "\t\t}");
if (i+1 != global_error_collector.error_values.count) {
res = gb_string_append_fmt(res, ",");
}
res = gb_string_append_fmt(res, "\n");
}
res = gb_string_append_fmt(res, "\t]\n");
res = gb_string_append_fmt(res, "}\n");
} else {
for_array(i, global_error_collector.error_values) {
ErrorValue ev = global_error_collector.error_values[i];
String_Iterator it = {{ev.msg.data, ev.msg.count}, 0};
for (isize line_idx = 0; /**/; line_idx++) {
String line = string_split_iterator(&it, '\n');
if (line.len == 0) {
break;
}
line = string_trim_trailing_whitespace(line);
res = gb_string_append_length(res, line.text, line.len);
res = gb_string_append_length(res, " \n", 2);
if (line_idx == 0 && terse_errors()) {
break;
}
}
}
}
gbFile *f = gb_file_get_standard(gbFileStandard_Error);
gb_file_write(f, res, gb_string_length(res));
}