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debug.zig
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const tab = @import("tab.zig");
const mem = @import("mem.zig");
const fmt = @import("fmt.zig");
const bits = @import("bits.zig");
const math = @import("math.zig");
const meta = @import("meta.zig");
const proc = @import("proc.zig");
const builtin = @import("builtin.zig");
const debug = @This();
pub const Error = error{
SubCausedOverflow,
AddCausedOverflow,
MulCausedOverflow,
LeftShiftCausedOverflow,
IntCastTruncatedBits,
ExactDivisionWithRemainder,
IncorrectAlignment,
};
pub const Unexpected = error{
UnexpectedValue,
UnexpectedLength,
};
pub const AlarmFn = @TypeOf(alarm);
pub const PanicFn = @TypeOf(panic);
pub const PanicExtraFn = @TypeOf(panic_extra.panicSignal);
pub const PanicOutOfBoundsFn = @TypeOf(panic_extra.panicOutOfBounds);
pub const PanicSentinelMismatchFn = @TypeOf(panic_extra.panicSentinelMismatch);
pub const PanicStartGreaterThanEndFn = @TypeOf(panic_extra.panicStartGreaterThanEnd);
pub const PanicInactiveUnionFieldFn = @TypeOf(panic_extra.panicInactiveUnionField);
pub const PanicUnwrapErrorFn = @TypeOf(panic_extra.panicUnwrapError);
pub const SignalHandlers = packed struct {
/// Report receipt of signal 11 SIGSEGV.
SegmentationFault: bool,
/// Report receipt of signal 4 SIGILL.
IllegalInstruction: bool,
/// Report receipt of signal 7 SIGBUS.
BusError: bool,
/// Report receipt of signal 8 SIGFPE.
FloatingPointError: bool,
/// Report receipt of signal 5 SIGTRAP.
Trap: bool,
};
pub const SignalAlternateStack = struct {
/// Address of lowest mapped byte.
addr: usize,
/// Initial mapping length.
len: usize,
};
pub const Trace = struct {
/// Show trace on alarm.
Error: bool = true,
/// Show trace on panic.
Fault: bool = true,
/// Show trace on signal.
Signal: bool = true,
/// Control output formatting.
options: Options = .{},
pub const Options = struct {
/// Unwind this many frames. max_depth = 0 is unlimited.
max_depth: u8 = 0,
/// Write this many lines of source code context.
context_line_count: u8 = 0,
/// Allow this many blank lines between source code contexts.
break_line_count: u8 = 0,
/// Show the source line number on source lines.
show_line_no: bool = true,
/// Show the program counter on the caret line.
show_pc_addr: bool = false,
/// Control sidebar inclusion and appearance.
write_sidebar: bool = true,
/// Write extra line to indicate column.
write_caret: bool = true,
/// Write full source location context for reference trace entries
/// (Compile errors only)
write_full_ref_trace: bool = false,
/// Define composition of stack trace text.
tokens: Tokens = .{},
pub const Tokens = struct {
/// Apply this style to the line number text.
line_no: ?[]const u8 = null,
/// Apply this style to the program counter address text.
pc_addr: ?[]const u8 = null,
/// Separate context information from sidebar with this text.
sidebar: []const u8 = "|",
/// Substitute absent `line_no` or `pc_addr` address with this text.
sidebar_fill: []const u8 = " ",
/// Indicate column number with this text.
caret: []const u8 = tab.fx.color.fg.light_green ++ "^" ++ tab.fx.none,
/// Fill text between `sidebar` and `caret` with this character.
caret_fill: []const u8 = " ",
/// Apply style for non-token text (comments)
comment: ?[]const u8 = null,
/// Apply `style` to every Zig token tag in `tags`.
syntax: ?[]const Mapping = null,
pub const Mapping = struct {
style: []const u8 = "",
tags: []const builtin.parse.Token.Tag = &meta.tagList(builtin.parse.Token.Tag),
};
};
};
};
pub const logging_general: Logging.Default = .{
.Attempt = builtin
.logging_override.Attempt orelse builtin
.logging_default.Attempt,
.Success = builtin
.logging_override.Success orelse builtin
.logging_default.Success,
.Acquire = builtin
.logging_override.Acquire orelse builtin
.logging_default.Acquire,
.Release = builtin
.logging_override.Release orelse builtin
.logging_default.Release,
.Error = builtin
.logging_override.Error orelse builtin
.logging_default.Error,
.Fault = builtin
.logging_override.Fault orelse builtin
.logging_default.Fault,
};
pub const Logging = packed struct {
pub const Default = packed struct {
/// Report attempted actions
Attempt: bool,
/// Report major successful actions
Success: bool,
/// Report actions which acquire a finite resource
Acquire: bool,
/// Report actions which release a finite resource
Release: bool,
/// Report actions which throw an error
Error: bool,
/// Report actions which terminate the program
Fault: bool,
};
pub const Override = struct {
/// Report attempted actions
Attempt: ?bool = null,
/// Report major successful actions
Success: ?bool = null,
/// Report actions which acquire a finite resource
Acquire: ?bool = null,
/// Report actions which release a finite resource
Release: ?bool = null,
/// Report actions which throw an error
Error: ?bool = null,
/// Report actions which terminate the program
Fault: ?bool = null,
};
pub fn Field(comptime Spec: type) type {
return @TypeOf(@field(@as(Spec, undefined), "logging"));
}
pub usingnamespace LoggingExtra;
};
pub fn loggingTypeTypes() []const type {
var ret: []const type = &.{};
var bit_size_of: u16 = 0;
while (true) : (bit_size_of +%= 1) {
var fields: @TypeOf(@typeInfo(Logging.Default).Struct.fields) = &.{};
const logging: Logging.Default = @as(Logging.Default, @bitCast(bits));
inline for (@typeInfo(Logging.Default).Struct.fields) |field| {
if (@field(logging, field.name)) {
fields = fields ++ .{field};
}
}
if (@popCount(bits) <= 1) {
continue;
}
if (!logging.Error and !logging.Fault) {
continue;
}
ret = ret ++ .{@Type(.{ .Struct = .{
.layout = .Packed,
.fields = fields,
.decls = &.{},
.is_tuple = false,
} })};
if (logging.Acquire and logging.Release and
logging.Attempt and logging.Error and logging.Fault)
{
break;
}
}
return ret;
}
pub fn assert(b: bool) void {
if (!b) {
if (@inComptime()) {
@compileError("assertion failed\n");
} else {
@panic("assertion failed\n");
}
}
}
pub fn assertBelow(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and arg1 >= arg2) {
debug.comparisonFailedFault(T, " < ", arg1, arg2, @returnAddress());
}
}
pub fn assertBelowOrEqual(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and arg1 > arg2) {
debug.comparisonFailedFault(T, " <= ", arg1, arg2, @returnAddress());
}
}
pub fn assertEqual(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and !mem.testEqual(T, arg1, arg2)) {
debug.comparisonFailedFault(T, " == ", arg1, arg2, @returnAddress());
}
}
pub fn assertNotEqual(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and mem.testEqual(T, arg1, arg2)) {
debug.comparisonFailedFault(T, " != ", arg1, arg2, @returnAddress());
}
}
pub fn assertAboveOrEqual(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and arg1 < arg2) {
debug.comparisonFailedFault(T, " >= ", arg1, arg2, @returnAddress());
}
}
pub fn assertAbove(comptime T: type, arg1: T, arg2: T) void {
if (builtin.runtime_assertions and arg1 <= arg2) {
debug.comparisonFailedFault(T, " > ", arg1, arg2, @returnAddress());
}
}
pub fn assertEqualWord(arg1: *align(1) const u32, arg2: *align(1) const u32) void {
assert(arg1.* == arg2.*);
}
pub fn assertEqualMemory(comptime T: type, arg1: T, arg2: T) void {
switch (@typeInfo(T)) {
else => @compileError(@typeName(T)),
.Int, .Enum => assertEqual(T, arg1, arg2),
.Struct => |struct_info| {
inline for (struct_info.fields) |field| {
assertEqualMemory(field.type, @field(arg1, field.name), @field(arg2, field.name));
}
},
.Union => |union_info| {
if (union_info.tag_type) |tag_type| {
assertEqual(tag_type, arg1, arg2);
switch (arg1) {
inline else => |value, tag| {
assertEqualMemory(@TypeOf(value), value, @field(arg2, @tagName(tag)));
},
}
} else {
@compileError(@typeName(T));
}
},
.Optional => |optional_info| {
if (arg1 != null and arg2 != null) {
assertEqualMemory(optional_info.child, arg1.?, arg2.?);
} else {
assert(arg1 == null and arg2 == null);
}
},
.Array => |array_info| {
assertEqual([]const array_info.child, &arg1, &arg2);
},
.Pointer => |pointer_info| {
switch (pointer_info.size) {
.Many => {
const len1: usize = mem.indexOfSentinel(arg1);
const len2: usize = mem.indexOfSentinel(arg2);
assertEqual(usize, len1, len2);
if (arg1 != arg2) {
for (arg1[0..len1], arg2[0..len2]) |value1, value2| {
assertEqualMemory(pointer_info.child, value1, value2);
}
}
},
.Slice => {
assertEqual(usize, arg1.len, arg2.len);
if (arg1.ptr != arg2.ptr) {
for (arg1, arg2) |value1, value2| {
assertEqualMemory(pointer_info.child, value1, value2);
}
}
},
else => assertEqualMemory(pointer_info.child, arg1.*, arg2.*),
}
},
}
}
pub fn expect(b: bool) debug.Unexpected!void {
if (!b) {
builtin.alarm(@errorName(error.UnexpectedValue), null, @returnAddress());
return error.UnexpectedValue;
}
}
pub fn expectBelow(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (arg1 >= arg2) {
return debug.comparisonFailedError(T, " < ", arg1, arg2, @returnAddress());
}
}
pub fn expectBelowOrEqual(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (arg1 > arg2) {
return debug.comparisonFailedError(T, " <= ", arg1, arg2, @returnAddress());
}
}
pub fn expectEqual(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (!mem.testEqual(T, arg1, arg2)) {
return debug.comparisonFailedError(T, " == ", arg1, arg2, @returnAddress());
}
}
pub fn expectNotEqual(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (mem.testEqual(T, arg1, arg2)) {
return debug.comparisonFailedError(T, " != ", arg1, arg2, @returnAddress());
}
}
pub fn expectAboveOrEqual(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (arg1 < arg2) {
return debug.comparisonFailedError(T, " >= ", arg1, arg2, @returnAddress());
}
}
pub fn expectAbove(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
if (arg1 <= arg2) {
return debug.comparisonFailedError(T, " > ", arg1, arg2, @returnAddress());
}
}
pub fn expectError(comptime T: type, arg1: @typeInfo(T).ErrorUnion.error_set, arg2: T) debug.Unexpected!void {
if (arg2) |payload| {
return comparisonFailedErrorValue(@TypeOf(payload), @errorName(arg1), payload);
} else |err| {
if (arg1 != err) {
return comparisonFailedErrorError(@typeName(@TypeOf(arg1)), @errorName(arg1), @errorName(err));
}
}
}
pub fn expectCast(comptime T: type, value: anytype) Error!T {
@setRuntimeSafety(false);
const extrema: math.Extrema = math.extrema(T);
if (value > extrema.max) {
return intCastTruncatedBitsError(T, @TypeOf(value), extrema.max, value, @returnAddress());
}
if (value < extrema.min) {
return intCastTruncatedBitsError(T, @TypeOf(value), extrema.min, value, @returnAddress());
}
return @intCast(value);
}
pub fn expectEqualMemory(comptime T: type, arg1: T, arg2: T) debug.Unexpected!void {
switch (@typeInfo(T)) {
else => @compileError(@typeName(T)),
.Void => {},
.Int, .Enum, .Bool => try expectEqual(T, arg1, arg2),
.Struct => |struct_info| {
inline for (struct_info.fields) |field| {
comptime var field_type_info: builtin.Type = @typeInfo(field.type);
if (field_type_info == .Pointer and
field_type_info.Pointer.size == .Many and
@hasField(T, field.name ++ "_len"))
{
const len1: usize = @field(arg1, field.name ++ "_len");
const len2: usize = @field(arg2, field.name ++ "_len");
field_type_info.Pointer.size = .Slice;
try expectEqualMemory(@Type(field_type_info), @field(arg1, field.name)[0..len1], @field(arg2, field.name)[0..len2]);
} else {
try expectEqualMemory(field.type, @field(arg1, field.name), @field(arg2, field.name));
}
}
},
.Union => |union_info| {
if (union_info.tag_type) |tag_type| {
try expectEqual(tag_type, arg1, arg2);
switch (arg1) {
inline else => |value, tag| {
try expectEqualMemory(@TypeOf(value), value, @field(arg2, @tagName(tag)));
},
}
} else {
@compileError(@typeName(T));
}
},
.Optional => |optional_info| {
if (arg1 != null and arg2 != null) {
try expectEqualMemory(optional_info.child, arg1.?, arg2.?);
} else {
try expect(arg1 == null and arg2 == null);
}
},
.Array => |array_info| {
try expectEqual([]const array_info.child, &arg1, &arg2);
},
.Pointer => |pointer_info| {
switch (pointer_info.size) {
.Many => {
const len1: usize = mem.indexOfSentinel(arg1);
const len2: usize = mem.indexOfSentinel(arg2);
try expectEqual(usize, len1, len2);
if (arg1 != arg2) {
for (arg1[0..len1], arg2[0..len2]) |value1, value2| {
try expectEqualMemory(pointer_info.child, value1, value2);
}
}
},
.Slice => {
try expectEqual(usize, arg1.len, arg2.len);
if (arg1.ptr != arg2.ptr) {
for (arg1, arg2) |value1, value2| {
try expectEqualMemory(pointer_info.child, value1, value2);
}
}
},
else => if (arg1 != arg2) {
try expectEqualMemory(pointer_info.child, arg1.*, arg2.*);
},
}
},
}
}
pub fn intCastTruncatedBitsError(comptime T: type, comptime U: type, lim: T, arg: U, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeIntCastTruncatedBits(T, U, &buf, lim, arg);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.IntCastTruncatedBits;
}
pub fn intCastTruncatedBitsFault(comptime T: type, comptime U: type, lim: T, arg: U, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeIntCastTruncatedBits(T, U, &buf, lim, arg);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn invalidEnumValueError(comptime T: type, type_name: []const u8, values: []const T, value: T, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeInvalidEnumValue(T, type_name, values, value);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.IntCastTruncatedBits;
}
pub fn invalidEnumValueFault(comptime T: type, type_name: []const u8, values: []const T, value: T, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeInvalidEnumValue(T, type_name, values, value);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn subCausedOverflowError(comptime T: type, lim: T, arg1: T, arg2: T, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeSubCausedOverflow(meta.BestInt(T), @typeName(T), &buf, lim, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.SubCausedOverflow;
}
pub fn subCausedOverflowFault(comptime T: type, lim: T, arg1: T, arg2: T, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeSubCausedOverflow(meta.BestInt(T), @typeName(T), &buf, lim, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn addCausedOverflowError(comptime T: type, lim: T, arg1: T, arg2: T, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeAddCausedOverflow(meta.BestInt(T), @typeName(T), &buf, lim, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.AddCausedOverflow;
}
pub fn addCausedOverflowFault(comptime T: type, lim: T, arg1: T, arg2: T, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeAddCausedOverflow(meta.BestInt(T), @typeName(T), &buf, lim, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn mulCausedOverflowError(comptime T: type, arg1: T, arg2: T, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeMulCausedOverflow(meta.BestInt(T), @typeName(T), &buf, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.MulCausedOverflow;
}
pub fn mulCausedOverflowFault(comptime T: type, arg1: T, arg2: T, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeMulCausedOverflow(meta.BestInt(T), @typeName(T), &buf, arg1, arg2);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn exactDivisionWithRemainderError(comptime T: type, arg1: T, arg2: T, result: T, remainder: T, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeExactDivisionWithRemainder(meta.BestInt(T), @typeName(T), &buf, arg1, arg2, result, remainder);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.ExactDivisionWithRemainder;
}
pub fn exactDivisionWithRemainderFault(comptime T: type, arg1: T, arg2: T, result: T, remainder: T, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeExactDivisionWithRemainder(meta.BestInt(T), @typeName(T), &buf, arg1, arg2, result, remainder);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn incorrectAlignmentError(child_type_name: []const u8, address: usize, alignment: usize, ret_addr: ?usize) Error {
@setCold(true);
@setRuntimeSafety(false);
const remainder: usize = address & (alignment -% 1);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeIncorrectAlignment(child_type_name, &buf, address, alignment, remainder);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.IncorrectAlignment;
}
pub fn incorrectAlignmentFault(child_type_name: []const u8, address: usize, alignment: usize, ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const remainder: usize = address & (alignment -% 1);
var buf: [4096]u8 = undefined;
const ptr: [*]u8 = about.writeIncorrectAlignment(child_type_name, &buf, address, alignment, remainder);
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn comparisonFailedFault(comptime T: type, symbol: []const u8, arg1: anytype, arg2: @TypeOf(arg1), ret_addr: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
buf[0..@typeName(T).len].* = @typeName(T).*;
var ptr: [*]u8 = buf[@typeName(T).len..];
ptr[0..19].* = " failed assertion: ".*;
ptr = switch (@typeInfo(T)) {
.Int => about.writeComparisonFailed(T, symbol, ptr + 19, arg1, arg2),
.Enum => fmt.strcpyEqu(fmt.strcpyEqu(fmt.strcpyEqu(ptr + 19, @tagName(arg1)), symbol), @tagName(arg2)),
.Type => fmt.strcpyEqu(fmt.strcpyEqu(fmt.strcpyEqu(ptr + 19, @typeName(arg1)), symbol), @typeName(arg2)),
else => fmt.strcpyEqu(ptr, " unexpected value"),
};
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn comparisonFailedErrorValue(comptime T: type, _: []const u8, _: T) Unexpected {
return error.UnexpectedValue;
}
pub fn comparisonFailedErrorError(_: []const u8, _: []const u8, _: []const u8) Unexpected {
return error.UnexpectedValue;
}
pub fn comparisonFailedError(comptime T: type, symbol: []const u8, arg1: anytype, arg2: @TypeOf(arg1), ret_addr: ?usize) Unexpected {
@setCold(true);
@setRuntimeSafety(false);
var buf: [4096]u8 = undefined;
buf[0..@typeName(T).len].* = @typeName(T).*;
var ptr: [*]u8 = buf[@typeName(T).len..];
ptr[0..14].* = " failed test: ".*;
ptr = switch (@typeInfo(T)) {
.Int => about.writeComparisonFailed(T, symbol, ptr + 14, arg1, arg2),
.Enum => fmt.strcpyEqu(fmt.strcpyEqu(fmt.strcpyEqu(ptr + 14, @tagName(arg1)), symbol), @tagName(arg2)),
.Type => fmt.strcpyEqu(fmt.strcpyEqu(fmt.strcpyEqu(ptr + 14, @typeName(arg1)), symbol), @typeName(arg2)),
else => fmt.strcpyEqu(ptr, " unexpected value"),
};
if (@inComptime()) @compileError(fmt.slice(ptr, &buf));
builtin.alarm(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr orelse @returnAddress());
return error.UnexpectedValue;
}
pub fn sampleAllReports() void {
if (false) {
inline for (.{ u16, u32, u64, usize, i16, i32, i64, isize }) |T| {
const arg1: comptime_int = ~@as(T, 0);
const arg2: comptime_int = ~@as(T, 0);
const result: T = 2;
const remainder: T = 2;
if (arg2 < arg1)
expectEqual(T, arg1, arg2) catch {};
expectNotEqual(T, arg1, arg2) catch {};
expectAbove(T, arg1, arg2) catch {};
expectBelow(T, arg1, arg2) catch {};
expectAboveOrEqual(T, arg1, arg2) catch {};
expectBelowOrEqual(T, arg1, arg2) catch {};
subCausedOverflowError(T, arg1, arg2, null) catch {};
addCausedOverflowError(T, arg1, arg2, null) catch {};
mulCausedOverflowError(T, arg1, arg2, null) catch {};
exactDivisionWithRemainderError(T, arg1, arg2, result, remainder, null) catch {};
if (@typeInfo(T).Int.signedness == .unsigned) {
incorrectAlignmentError(@typeName(T), arg2, remainder, null) catch {};
}
}
}
const _u8: u8 = 128;
const _u16: u16 = 32768;
const _u32: u32 = 2147483648;
const _u64: u64 = ~@as(i64, 0) +% 1;
const _i8: i8 = -128;
const _i16: i16 = -32768;
const _i32: i32 = -2147483648;
const _i64: i64 = ~@as(i64, 0);
_ = expectCast(i3, _u8) catch {};
_ = expectCast(u3, _i8) catch {};
_ = expectCast(i8, _u16) catch {};
_ = expectCast(u8, _i16) catch {};
_ = expectCast(i16, _u32) catch {};
_ = expectCast(u16, _i32) catch {};
_ = expectCast(i32, _u64) catch {};
_ = expectCast(u32, _i64) catch {};
_ = expectCast(u3, _u8) catch {};
_ = expectCast(u8, _u16) catch {};
_ = expectCast(u16, _u32) catch {};
_ = expectCast(u32, _u64) catch {};
_ = expectCast(i3, _i8) catch {};
_ = expectCast(i8, _i16) catch {};
_ = expectCast(i16, _i32) catch {};
_ = expectCast(i32, _i64) catch {};
about.faultNotice("message");
about.errorNotice(@errorName(error.Error));
about.errorFaultNotice(@errorName(error.Error), "message");
about.faultRcNotice("message", 2);
about.errorRcNotice(@errorName(error.Error), 1);
about.errorFaultRcNotice(@errorName(error.Error), "message", 2);
}
pub fn write(buf: []const u8) void {
if (@inComptime()) {
@compileError(buf);
} else {
asm volatile (
\\syscall # write
:
: [_] "{rax}" (1), // linux sys_write
[_] "{rdi}" (builtin.debug_write_fd orelse @compileError("debug.write disabled")), // stderr
[_] "{rsi}" (buf.ptr),
[_] "{rdx}" (buf.len),
: "rcx", "r11", "memory", "rax"
);
}
}
pub fn read(comptime n: u64) struct { buf: [n]u8, len: u64 } {
var buf: [n]u8 = undefined;
return .{
.buf = buf,
.len = asm volatile (
\\syscall # read
: [_] "={rax}" (-> usize),
: [_] "{rax}" (0), // linux sys_read
[_] "{rdi}" (0), // stdin
[_] "{rsi}" (&buf),
[_] "{rdx}" (n),
: "rcx", "r11", "memory"
),
};
}
const special = struct {
/// Used by panic functions if executable is static linked with special
/// module object `trace.o`.
extern fn printStackTrace(*const Trace, usize, usize) void;
extern fn printSourceCodeAtAddress(*const Trace, usize) void;
extern fn printSourceCodeAtAddresses(*const Trace, usize, [*]usize, usize) void;
pub const trace = @import("trace.zig");
};
pub const printStackTrace = blk: {
if (builtin.strip_debug_info)
@compileError("missing debug information")
else {
if (builtin.want_stack_traces and
!builtin.have_stack_traces and
builtin.output_mode == .Exe)
{
break :blk special.trace.printStackTrace;
} else {
break :blk special.printStackTrace;
}
}
};
pub const printSourceCodeAtAddress = blk: {
if (builtin.strip_debug_info)
@compileError("missing debug information")
else {
if (builtin.want_stack_traces and
!builtin.have_stack_traces and
builtin.output_mode == .Exe)
{
break :blk special.trace.printSourceCodeAtAddress;
} else {
break :blk special.printSourceCodeAtAddress;
}
}
};
pub const printSourceCodeAtAddresses = blk: {
if (builtin.strip_debug_info)
@compileError("missing debug information")
else {
if (builtin.want_stack_traces and
!builtin.have_stack_traces and
builtin.output_mode == .Exe)
{
break :blk special.trace.printSourceCodeAtAddresses;
} else {
break :blk special.printSourceCodeAtAddresses;
}
}
};
pub noinline fn alarm(error_name: []const u8, st: @TypeOf(@errorReturnTrace()), ret_addr: ?usize) void {
@setCold(true);
@setRuntimeSafety(false);
if (builtin.want_stack_traces and logging_general.Error) {
if (ret_addr) |addr| {
printStackTrace(&builtin.trace, addr, 0);
} else {
if (st) |trace| {
printSourceCodeAtAddresses(&builtin.trace, 0, trace.instruction_addresses.ptr, trace.index);
}
}
}
@call(.always_inline, about.errorNotice, .{error_name});
}
pub noinline fn panic(message: []const u8, _: @TypeOf(@errorReturnTrace()), ret_addr: ?usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
if (builtin.want_stack_traces) {
printStackTrace(&builtin.trace, ret_addr orelse @returnAddress(), 0);
}
@call(.always_inline, proc.exitGroupFault, .{ message, builtin.panic_return_value });
}
pub const panic_extra = struct {
pub noinline fn checkNonScalarSentinel(expected: anytype, actual: @TypeOf(expected)) void {
@setRuntimeSafety(false);
if (!builtin.permit_non_scalar_sentinel) {
@compileError("non-scalar sentinel type forbidden");
}
if (!mem.testEqual(@TypeOf(expected), expected, actual)) {
@call(.always_inline, builtin.panicSentinelMismatch, .{ expected, actual });
}
}
pub inline fn addErrRetTraceAddr(st: *builtin.StackTrace, ret_addr: usize) void {
@setRuntimeSafety(false);
if (st.index < st.instruction_addresses.len) {
st.instruction_addresses[st.index] = ret_addr;
}
st.index +%= 1;
}
pub noinline fn returnError(st: *builtin.StackTrace) void {
@setCold(true);
@setRuntimeSafety(false);
addErrRetTraceAddr(st, @returnAddress());
}
pub noinline fn panicSignal(message: []const u8, ctx_ptr: *const anyopaque) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const regs: bits.RegisterState = @as(*bits.RegisterState, @ptrFromInt(@intFromPtr(ctx_ptr) +% bits.RegisterState.offset)).*;
if (!builtin.strip_debug_info and
builtin.want_stack_traces and builtin.trace.Signal)
{
printStackTrace(&builtin.trace, regs.rip, regs.rbp);
}
@call(.always_inline, proc.exitGroupFault, .{ message, builtin.panic_return_value });
}
pub noinline fn panicOutOfBounds(idx: usize, max_len: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..6].* = "index ".*;
var ptr: [*]u8 = buf[5..];
if (max_len == 0) {
ptr[0..5].* = "ing (".*;
ptr = fmt.Ud64.write(ptr + 5, idx);
ptr[0..18].* = ") into empty array".*;
ptr += 18;
} else {
ptr = fmt.Ud64.write(ptr + 1, idx);
ptr[0..15].* = " above maximum ".*;
ptr = fmt.Ud64.write(ptr + 15, max_len -% 1);
}
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub noinline fn panicAddressAboveUpperBound(addr: usize, finish: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..8].* = "address ".*;
var ptr: [*]u8 = buf[8..];
var ux64: fmt.Ux64 = .{ .value = addr };
ptr += ux64.formatWriteBuf(ptr);
ptr[0..19].* = " above upper bound ".*;
ptr += 19;
ux64.value = finish;
ptr += ux64.formatWriteBuf(ptr);
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub noinline fn panicAddressBelowLowerBound(addr: usize, start: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..8].* = "address ".*;
var ptr: [*]u8 = buf[8..];
var ux64: fmt.Ux64 = .{ .value = addr };
ptr += ux64.formatWriteBuf(ptr);
ptr[0..19].* = " below lower bound ".*;
ptr += 19;
ux64.value = start;
ptr += ux64.formatWriteBuf(ptr);
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub fn panicSentinelMismatch(expected: anytype, actual: @TypeOf(expected)) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..28].* = "sentinel mismatch: expected ".*;
var ptr: [*]u8 = buf[28..];
ptr += fmt.any(expected).formatWriteBuf(ptr);
ptr[0..8].* = ", found ".*;
ptr += 8;
ptr += fmt.any(actual).formatWriteBuf(ptr);
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub noinline fn panicStartGreaterThanEnd(lower: usize, upper: usize) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..12].* = "start index ".*;
var ptr: [*]u8 = buf[12..];
ptr = fmt.Ud64.write(ptr, lower);
ptr[0..26].* = " is larger than end index ".*;
ptr += 26;
ptr = fmt.Ud64.write(ptr, upper);
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub noinline fn panicInactiveUnionField(active: anytype, wanted: @TypeOf(active)) noreturn {
@setCold(true);
@setRuntimeSafety(false);
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..23].* = "access of union field '".*;
var ptr: [*]u8 = fmt.strcpyEqu(buf[23..], @tagName(wanted));
ptr[0..15].* = "' while field '".*;
ptr += 15;
ptr = fmt.strcpyEqu(ptr, @tagName(active));
ptr[0..11].* = "' is active".*;
ptr += 11;
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], null, ret_addr);
}
pub noinline fn panicUnwrapError(st: ?*builtin.StackTrace, err: anyerror) noreturn {
if (builtin.permit_discard_errors) {
const ret_addr: usize = @returnAddress();
var buf: [1024]u8 = undefined;
buf[0..20].* = "error is discarded: ".*;
const ptr: [*]u8 = fmt.strcpyEqu(buf[20..], @errorName(err));
builtin.panic(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)], st, ret_addr);
}
@compileError("error is discarded");
}
};
pub noinline fn aboutWhere(about_s: []const u8, message: []const u8, ret_addr: ?usize, mb_src: ?builtin.SourceLocation) void {
var buf: [4096]u8 = undefined;
const pid: u32 = proc.getProcessId();
const tid: u32 = proc.getThreadId();
var ptr: [*]u8 = fmt.strcpyEqu(&buf, about_s);
ptr = fmt.strcpyEqu(ptr, message);
ptr[0..6].* = ", pid=".*;
ptr += 6;
ptr = fmt.Ud64.write(ptr, pid);
if (pid != tid) {
ptr[0..6].* = ", tid=".*;
ptr += 6;
ptr = fmt.Ud64.write(ptr, tid);
}
if (mb_src) |src| {
ptr[0..2].* = ", ".*;
ptr += 2;
ptr += fmt.SourceLocationFormat.init(src, ret_addr orelse @returnAddress()).formatWriteBuf(ptr);
}
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) - @intFromPtr(&buf)]);
}
pub const about = struct {
pub const ErrorSrc = @TypeOf(error_s);
pub const ErrorDest = @TypeOf(@constCast(error_s));
pub const ErrorPDest = @TypeOf(@constCast(error_p0_s));
pub const FaultPDest = @TypeOf(@constCast(fault_p0_s));
pub const error_s = "\x1b[91;1merror\x1b[0m=";
pub const fault_p0_s = blk: {
var lhs: [:0]const u8 = builtin.message_prefix ++ "fault" ++ builtin.message_suffix;
const len: usize = lhs.len;
lhs = "\x1b[1m" ++ lhs ++ builtin.message_no_style;
break :blk lhs ++ " " ** (builtin.message_indent - len);
};
pub const error_p0_s = blk: {
var lhs: [:0]const u8 = builtin.message_prefix ++ "error" ++ builtin.message_suffix;
const len: usize = lhs.len;
lhs = "\x1b[1m" ++ lhs ++ builtin.message_no_style;
break :blk lhs ++ " " ** (builtin.message_indent - len);
};
pub const note_p0_s = blk: {
var lhs: [:0]const u8 = builtin.message_prefix ++ "note" ++ builtin.message_suffix;
const len: usize = lhs.len;
lhs = "\x1b[96;1m" ++ lhs ++ builtin.message_no_style;
break :blk lhs ++ " " ** (builtin.message_indent - len);
};
pub const test_1_s = "test failed";
pub const assertion_1_s = "assertion failed";
pub fn writeAboutError(buf: [*]u8, about_s: [:0]const u8, error_name: []const u8) [*]u8 {
var ptr: [*]u8 = fmt.strcpyEqu(buf, about_s);
ptr[0..error_s.len].* = error_s.*;
return fmt.strcpyEqu(ptr + error_s.len, error_name);
}
pub fn aboutError(about_s: fmt.AboutSrc, error_name: [:0]const u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [32768]u8 = undefined;
var ptr: [*]u8 = writeAboutError(&buf, about_s, error_name);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn exitRcNotice(rc: u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = buf[fmt.about_exit_s.len..];
buf[0..fmt.about_exit_s.len].* = fmt.about_exit_s.*;
ptr[0..3].* = "rc=".*;
ptr += 3;
ptr = fmt.Ud64.write(ptr, rc);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn errorRcNotice(error_name: []const u8, rc: u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = writeAboutError(&buf, error_p0_s, error_name);
ptr[0..5].* = ", rc=".*;
ptr += 5;
ptr = fmt.Ud64.write(ptr, rc);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn errorFaultRcNotice(error_name: []const u8, message: []const u8, rc: u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = writeAboutError(&buf, fault_p0_s, error_name);
ptr[0..2].* = ", ".*;
ptr += 2;
ptr = fmt.strcpyEqu(ptr, message);
ptr[0..5].* = ", rc=".*;
ptr += 5;
ptr = fmt.Ud64.write(ptr, rc);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn errorNotice(error_name: []const u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = buf[about.error_p0_s.len..];
buf[0..about.error_p0_s.len].* = about.error_p0_s.*;
ptr = fmt.strcpyEqu(ptr, error_name);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn faultNotice(message: []const u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = buf[about.fault_p0_s.len..];
buf[0..about.fault_p0_s.len].* = about.fault_p0_s.*;
ptr = fmt.strcpyEqu(ptr, message);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn faultRcNotice(message: []const u8, rc: u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = buf[about.fault_p0_s.len..];
buf[0..about.fault_p0_s.len].* = about.fault_p0_s.*;
ptr = fmt.strcpyEqu(ptr, message);
ptr[0..5].* = ", rc=".*;
ptr += 5;
ptr = fmt.Ud64.write(ptr, rc);
ptr[0] = '\n';
ptr += 1;
write(buf[0 .. @intFromPtr(ptr) -% @intFromPtr(&buf)]);
}
pub fn errorFaultNotice(error_name: []const u8, message: []const u8) void {
@setRuntimeSafety(builtin.is_safe);
var buf: [4096]u8 = undefined;
var ptr: [*]u8 = writeAboutError(&buf, fault_p0_s, error_name);
ptr[0..2].* = ", ".*;
ptr += 2;
ptr = fmt.strcpyEqu(ptr, message);
ptr[0] = '\n';
ptr += 1;