zig/test/runtime_safety.zig
Andrew Kelley 8cfa231104 update langref, compile-error tests, safety tests
for the std.builtin re-arranging
2021-05-17 15:25:27 -07:00

1096 lines
37 KiB
Zig

const tests = @import("tests.zig");
pub fn addCases(cases: *tests.CompareOutputContext) void {
{
const check_panic_msg =
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "reached unreachable code")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
;
cases.addRuntimeSafety("switch on corrupted enum value",
\\const std = @import("std");
++ check_panic_msg ++
\\const E = enum(u32) {
\\ X = 1,
\\};
\\pub fn main() void {
\\ var e: E = undefined;
\\ @memset(@ptrCast([*]u8, &e), 0x55, @sizeOf(E));
\\ switch (e) {
\\ .X => @breakpoint(),
\\ }
\\}
);
cases.addRuntimeSafety("switch on corrupted union value",
\\const std = @import("std");
++ check_panic_msg ++
\\const U = union(enum(u32)) {
\\ X: u8,
\\};
\\pub fn main() void {
\\ var u: U = undefined;
\\ @memset(@ptrCast([*]u8, &u), 0x55, @sizeOf(U));
\\ switch (u) {
\\ .X => @breakpoint(),
\\ }
\\}
);
}
{
const check_panic_msg =
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "invalid enum value")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
;
cases.addRuntimeSafety("@tagName on corrupted enum value",
\\const std = @import("std");
++ check_panic_msg ++
\\const E = enum(u32) {
\\ X = 1,
\\};
\\pub fn main() void {
\\ var e: E = undefined;
\\ @memset(@ptrCast([*]u8, &e), 0x55, @sizeOf(E));
\\ var n = @tagName(e);
\\}
);
cases.addRuntimeSafety("@tagName on corrupted union value",
\\const std = @import("std");
++ check_panic_msg ++
\\const U = union(enum(u32)) {
\\ X: u8,
\\};
\\pub fn main() void {
\\ var u: U = undefined;
\\ @memset(@ptrCast([*]u8, &u), 0x55, @sizeOf(U));
\\ var t: @typeInfo(U).Union.tag_type.? = u;
\\ var n = @tagName(t);
\\}
);
}
{
const check_panic_msg =
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "index out of bounds")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
;
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf = [4]u8{'a','b','c',0};
\\ const slice = buf[0..4 :0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf = [4]u8{'a','b','c',0};
\\ const slice = buf[0..:0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf_zero = [0]u8{};
\\ const slice = buf_zero[0..0 :0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf_zero = [0]u8{};
\\ const slice = buf_zero[0..:0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf_sentinel = [2:0]u8{'a','b'};
\\ @ptrCast(*[3]u8, &buf_sentinel)[2] = 0;
\\ const slice = buf_sentinel[0..3 :0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf_slice: []const u8 = &[3]u8{ 'a', 'b', 0 };
\\ const slice = buf_slice[0..3 :0];
\\}
);
cases.addRuntimeSafety("slicing operator with sentinel",
\\const std = @import("std");
++ check_panic_msg ++
\\pub fn main() void {
\\ var buf_slice: []const u8 = &[3]u8{ 'a', 'b', 0 };
\\ const slice = buf_slice[0.. :0];
\\}
);
}
cases.addRuntimeSafety("truncating vector cast",
\\const std = @import("std");
\\const V = @import("std").meta.Vector;
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "integer cast truncated bits")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x = @splat(4, @as(u32, 0xdeadbeef));
\\ var y = @intCast(V(4, u16), x);
\\}
);
cases.addRuntimeSafety("unsigned-signed vector cast",
\\const std = @import("std");
\\const V = @import("std").meta.Vector;
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "integer cast truncated bits")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x = @splat(4, @as(u32, 0x80000000));
\\ var y = @intCast(V(4, i32), x);
\\}
);
cases.addRuntimeSafety("signed-unsigned vector cast",
\\const std = @import("std");
\\const V = @import("std").meta.Vector;
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "attempt to cast negative value to unsigned integer")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x = @splat(4, @as(i32, -2147483647));
\\ var y = @intCast(V(4, u32), x);
\\}
);
cases.addRuntimeSafety("shift left by huge amount",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x: u24 = 42;
\\ var y: u5 = 24;
\\ var z = x >> y;
\\}
);
cases.addRuntimeSafety("shift right by huge amount",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x: u24 = 42;
\\ var y: u5 = 24;
\\ var z = x << y;
\\}
);
cases.addRuntimeSafety("slice sentinel mismatch - optional pointers",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "sentinel mismatch")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var buf: [4]?*i32 = undefined;
\\ const slice = buf[0..3 :null];
\\}
);
cases.addRuntimeSafety("slice sentinel mismatch - floats",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "sentinel mismatch")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var buf: [4]f32 = undefined;
\\ const slice = buf[0..3 :1.2];
\\}
);
cases.addRuntimeSafety("pointer slice sentinel mismatch",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "sentinel mismatch")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var buf: [4]u8 = undefined;
\\ const ptr: [*]u8 = &buf;
\\ const slice = ptr[0..3 :0];
\\}
);
cases.addRuntimeSafety("slice slice sentinel mismatch",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "sentinel mismatch")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var buf: [4]u8 = undefined;
\\ const slice = buf[0..];
\\ const slice2 = slice[0..3 :0];
\\}
);
cases.addRuntimeSafety("array slice sentinel mismatch",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "sentinel mismatch")) {
\\ std.process.exit(126); // good
\\ }
\\ std.process.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var buf: [4]u8 = undefined;
\\ const slice = buf[0..3 :0];
\\}
);
cases.addRuntimeSafety("intToPtr with misaligned address",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "incorrect alignment")) {
\\ std.os.exit(126); // good
\\ }
\\ std.os.exit(0); // test failed
\\}
\\pub fn main() void {
\\ var x: usize = 5;
\\ var y = @intToPtr([*]align(4) u8, x);
\\}
);
cases.addRuntimeSafety("resuming a non-suspended function which never been suspended",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\fn foo() void {
\\ var f = async bar(@frame());
\\ std.os.exit(0);
\\}
\\
\\fn bar(frame: anyframe) void {
\\ suspend {
\\ resume frame;
\\ }
\\ std.os.exit(0);
\\}
\\
\\pub fn main() void {
\\ _ = async foo();
\\}
);
cases.addRuntimeSafety("resuming a non-suspended function which has been suspended and resumed",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\fn foo() void {
\\ suspend {
\\ global_frame = @frame();
\\ }
\\ var f = async bar(@frame());
\\ std.os.exit(0);
\\}
\\
\\fn bar(frame: anyframe) void {
\\ suspend {
\\ resume frame;
\\ }
\\ std.os.exit(0);
\\}
\\
\\var global_frame: anyframe = undefined;
\\pub fn main() void {
\\ _ = async foo();
\\ resume global_frame;
\\ std.os.exit(0);
\\}
);
cases.addRuntimeSafety("nosuspend function call, callee suspends",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ _ = nosuspend add(101, 100);
\\}
\\fn add(a: i32, b: i32) i32 {
\\ if (a > 100) {
\\ suspend {}
\\ }
\\ return a + b;
\\}
);
cases.addRuntimeSafety("awaiting twice",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\var frame: anyframe = undefined;
\\
\\pub fn main() void {
\\ _ = async amain();
\\ resume frame;
\\}
\\
\\fn amain() void {
\\ var f = async func();
\\ await f;
\\ await f;
\\}
\\
\\fn func() void {
\\ suspend {
\\ frame = @frame();
\\ }
\\}
);
cases.addRuntimeSafety("@asyncCall with too small a frame",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var bytes: [1]u8 align(16) = undefined;
\\ var ptr = other;
\\ var frame = @asyncCall(&bytes, {}, ptr, .{});
\\}
\\fn other() callconv(.Async) void {
\\ suspend {}
\\}
);
cases.addRuntimeSafety("resuming a function which is awaiting a frame",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var frame = async first();
\\ resume frame;
\\}
\\fn first() void {
\\ var frame = async other();
\\ await frame;
\\}
\\fn other() void {
\\ suspend {}
\\}
);
cases.addRuntimeSafety("resuming a function which is awaiting a call",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var frame = async first();
\\ resume frame;
\\}
\\fn first() void {
\\ other();
\\}
\\fn other() void {
\\ suspend {}
\\}
);
cases.addRuntimeSafety("invalid resume of async function",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var p = async suspendOnce();
\\ resume p; //ok
\\ resume p; //bad
\\}
\\fn suspendOnce() void {
\\ suspend {}
\\}
);
cases.addRuntimeSafety(".? operator on null pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var ptr: ?*i32 = null;
\\ var b = ptr.?;
\\}
);
cases.addRuntimeSafety(".? operator on C pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var ptr: [*c]i32 = null;
\\ var b = ptr.?;
\\}
);
cases.addRuntimeSafety("@intToPtr address zero to non-optional pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var zero: usize = 0;
\\ var b = @intToPtr(*i32, zero);
\\}
);
cases.addRuntimeSafety("@intToPtr address zero to non-optional byte-aligned pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var zero: usize = 0;
\\ var b = @intToPtr(*u8, zero);
\\}
);
cases.addRuntimeSafety("pointer casting null to non-optional pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var c_ptr: [*c]u8 = 0;
\\ var zig_ptr: *u8 = c_ptr;
\\}
);
cases.addRuntimeSafety("@intToEnum - no matching tag value",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\const Foo = enum {
\\ A,
\\ B,
\\ C,
\\};
\\pub fn main() void {
\\ baz(bar(3));
\\}
\\fn bar(a: u2) Foo {
\\ return @intToEnum(Foo, a);
\\}
\\fn baz(a: Foo) void {}
);
cases.addRuntimeSafety("@floatToInt cannot fit - negative to unsigned",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ baz(bar(-1.1));
\\}
\\fn bar(a: f32) u8 {
\\ return @floatToInt(u8, a);
\\}
\\fn baz(a: u8) void { }
);
cases.addRuntimeSafety("@floatToInt cannot fit - negative out of range",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ baz(bar(-129.1));
\\}
\\fn bar(a: f32) i8 {
\\ return @floatToInt(i8, a);
\\}
\\fn baz(a: i8) void { }
);
cases.addRuntimeSafety("@floatToInt cannot fit - positive out of range",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ baz(bar(256.2));
\\}
\\fn bar(a: f32) u8 {
\\ return @floatToInt(u8, a);
\\}
\\fn baz(a: u8) void { }
);
cases.addRuntimeSafety("calling panic",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ @panic("oh no");
\\}
);
cases.addRuntimeSafety("out of bounds slice access",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ const a = [_]i32{1, 2, 3, 4};
\\ baz(bar(&a));
\\}
\\fn bar(a: []const i32) i32 {
\\ return a[4];
\\}
\\fn baz(a: i32) void { }
);
cases.addRuntimeSafety("integer addition overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = add(65530, 10);
\\ if (x == 0) return error.Whatever;
\\}
\\fn add(a: u16, b: u16) u16 {
\\ return a + b;
\\}
);
cases.addRuntimeSafety("vector integer addition overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var a: std.meta.Vector(4, i32) = [_]i32{ 1, 2, 2147483643, 4 };
\\ var b: std.meta.Vector(4, i32) = [_]i32{ 5, 6, 7, 8 };
\\ const x = add(a, b);
\\}
\\fn add(a: std.meta.Vector(4, i32), b: std.meta.Vector(4, i32)) std.meta.Vector(4, i32) {
\\ return a + b;
\\}
);
cases.addRuntimeSafety("vector integer subtraction overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var a: std.meta.Vector(4, u32) = [_]u32{ 1, 2, 8, 4 };
\\ var b: std.meta.Vector(4, u32) = [_]u32{ 5, 6, 7, 8 };
\\ const x = sub(b, a);
\\}
\\fn sub(a: std.meta.Vector(4, u32), b: std.meta.Vector(4, u32)) std.meta.Vector(4, u32) {
\\ return a - b;
\\}
);
cases.addRuntimeSafety("vector integer multiplication overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var a: std.meta.Vector(4, u8) = [_]u8{ 1, 2, 200, 4 };
\\ var b: std.meta.Vector(4, u8) = [_]u8{ 5, 6, 2, 8 };
\\ const x = mul(b, a);
\\}
\\fn mul(a: std.meta.Vector(4, u8), b: std.meta.Vector(4, u8)) std.meta.Vector(4, u8) {
\\ return a * b;
\\}
);
cases.addRuntimeSafety("vector integer negation overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var a: std.meta.Vector(4, i16) = [_]i16{ 1, -32768, 200, 4 };
\\ const x = neg(a);
\\}
\\fn neg(a: std.meta.Vector(4, i16)) std.meta.Vector(4, i16) {
\\ return -a;
\\}
);
cases.addRuntimeSafety("integer subtraction overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = sub(10, 20);
\\ if (x == 0) return error.Whatever;
\\}
\\fn sub(a: u16, b: u16) u16 {
\\ return a - b;
\\}
);
cases.addRuntimeSafety("integer multiplication overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = mul(300, 6000);
\\ if (x == 0) return error.Whatever;
\\}
\\fn mul(a: u16, b: u16) u16 {
\\ return a * b;
\\}
);
cases.addRuntimeSafety("integer negation overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = neg(-32768);
\\ if (x == 32767) return error.Whatever;
\\}
\\fn neg(a: i16) i16 {
\\ return -a;
\\}
);
cases.addRuntimeSafety("signed integer division overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = div(-32768, -1);
\\ if (x == 32767) return error.Whatever;
\\}
\\fn div(a: i16, b: i16) i16 {
\\ return @divTrunc(a, b);
\\}
);
cases.addRuntimeSafety("signed integer division overflow - vectors",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ var a: std.meta.Vector(4, i16) = [_]i16{ 1, 2, -32768, 4 };
\\ var b: std.meta.Vector(4, i16) = [_]i16{ 1, 2, -1, 4 };
\\ const x = div(a, b);
\\ if (x[2] == 32767) return error.Whatever;
\\}
\\fn div(a: std.meta.Vector(4, i16), b: std.meta.Vector(4, i16)) std.meta.Vector(4, i16) {
\\ return @divTrunc(a, b);
\\}
);
cases.addRuntimeSafety("signed shift left overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shl(-16385, 1);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shl(a: i16, b: u4) i16 {
\\ return @shlExact(a, b);
\\}
);
cases.addRuntimeSafety("unsigned shift left overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shl(0b0010111111111111, 3);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shl(a: u16, b: u4) u16 {
\\ return @shlExact(a, b);
\\}
);
cases.addRuntimeSafety("signed shift right overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shr(-16385, 1);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shr(a: i16, b: u4) i16 {
\\ return @shrExact(a, b);
\\}
);
cases.addRuntimeSafety("unsigned shift right overflow",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shr(0b0010111111111111, 3);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shr(a: u16, b: u4) u16 {
\\ return @shrExact(a, b);
\\}
);
cases.addRuntimeSafety("integer division by zero",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ const x = div0(999, 0);
\\}
\\fn div0(a: i32, b: i32) i32 {
\\ return @divTrunc(a, b);
\\}
);
cases.addRuntimeSafety("integer division by zero - vectors",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var a: std.meta.Vector(4, i32) = [4]i32{111, 222, 333, 444};
\\ var b: std.meta.Vector(4, i32) = [4]i32{111, 0, 333, 444};
\\ const x = div0(a, b);
\\}
\\fn div0(a: std.meta.Vector(4, i32), b: std.meta.Vector(4, i32)) std.meta.Vector(4, i32) {
\\ return @divTrunc(a, b);
\\}
);
cases.addRuntimeSafety("exact division failure",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = divExact(10, 3);
\\ if (x == 0) return error.Whatever;
\\}
\\fn divExact(a: i32, b: i32) i32 {
\\ return @divExact(a, b);
\\}
);
cases.addRuntimeSafety("exact division failure - vectors",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ var a: std.meta.Vector(4, i32) = [4]i32{111, 222, 333, 444};
\\ var b: std.meta.Vector(4, i32) = [4]i32{111, 222, 333, 441};
\\ const x = divExact(a, b);
\\}
\\fn divExact(a: std.meta.Vector(4, i32), b: std.meta.Vector(4, i32)) std.meta.Vector(4, i32) {
\\ return @divExact(a, b);
\\}
);
cases.addRuntimeSafety("cast []u8 to bigger slice of wrong size",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = widenSlice(&[_]u8{1, 2, 3, 4, 5});
\\ if (x.len == 0) return error.Whatever;
\\}
\\fn widenSlice(slice: []align(1) const u8) []align(1) const i32 {
\\ return std.mem.bytesAsSlice(i32, slice);
\\}
);
cases.addRuntimeSafety("value does not fit in shortening cast",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shorten_cast(200);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shorten_cast(x: i32) i8 {
\\ return @intCast(i8, x);
\\}
);
cases.addRuntimeSafety("value does not fit in shortening cast - u0",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = shorten_cast(1);
\\ if (x == 0) return error.Whatever;
\\}
\\fn shorten_cast(x: u8) u0 {
\\ return @intCast(u0, x);
\\}
);
cases.addRuntimeSafety("signed integer not fitting in cast to unsigned integer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ const x = unsigned_cast(-10);
\\ if (x == 0) return error.Whatever;
\\}
\\fn unsigned_cast(x: i32) u32 {
\\ return @intCast(u32, x);
\\}
);
cases.addRuntimeSafety("signed integer not fitting in cast to unsigned integer - widening",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var value: c_short = -1;
\\ var casted = @intCast(u32, value);
\\}
);
cases.addRuntimeSafety("unsigned integer not fitting in cast to signed integer - same bit count",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ var value: u8 = 245;
\\ var casted = @intCast(i8, value);
\\}
);
cases.addRuntimeSafety("unwrap error",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ if (std.mem.eql(u8, message, "attempt to unwrap error: Whatever")) {
\\ std.os.exit(126); // good
\\ }
\\ std.os.exit(0); // test failed
\\}
\\pub fn main() void {
\\ bar() catch unreachable;
\\}
\\fn bar() !void {
\\ return error.Whatever;
\\}
);
cases.addRuntimeSafety("cast integer to global error and no code matches",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() void {
\\ bar(9999) catch {};
\\}
\\fn bar(x: u16) anyerror {
\\ return @intToError(x);
\\}
);
cases.addRuntimeSafety("@errSetCast error not present in destination",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\const Set1 = error{A, B};
\\const Set2 = error{A, C};
\\pub fn main() void {
\\ foo(Set1.B) catch {};
\\}
\\fn foo(set1: Set1) Set2 {
\\ return @errSetCast(Set2, set1);
\\}
);
cases.addRuntimeSafety("@alignCast misaligned",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\pub fn main() !void {
\\ var array align(4) = [_]u32{0x11111111, 0x11111111};
\\ const bytes = std.mem.sliceAsBytes(array[0..]);
\\ if (foo(bytes) != 0x11111111) return error.Wrong;
\\}
\\fn foo(bytes: []u8) u32 {
\\ const slice4 = bytes[1..5];
\\ const int_slice = std.mem.bytesAsSlice(u32, @alignCast(4, slice4));
\\ return int_slice[0];
\\}
);
cases.addRuntimeSafety("bad union field access",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\
\\const Foo = union {
\\ float: f32,
\\ int: u32,
\\};
\\
\\pub fn main() void {
\\ var f = Foo { .int = 42 };
\\ bar(&f);
\\}
\\
\\fn bar(f: *Foo) void {
\\ f.float = 12.34;
\\}
);
// @intCast a runtime integer to u0 actually results in a comptime-known value,
// but we still emit a safety check to ensure the integer was 0 and thus
// did not truncate information.
cases.addRuntimeSafety("@intCast to u0",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\
\\pub fn main() void {
\\ bar(1, 1);
\\}
\\
\\fn bar(one: u1, not_zero: i32) void {
\\ var x = one << @intCast(u0, not_zero);
\\}
);
// This case makes sure that the code compiles and runs. There is not actually a special
// runtime safety check having to do specifically with error return traces across suspend points.
cases.addRuntimeSafety("error return trace across suspend points",
\\const std = @import("std");
\\
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\
\\var failing_frame: @Frame(failing) = undefined;
\\
\\pub fn main() void {
\\ const p = nonFailing();
\\ resume p;
\\ const p2 = async printTrace(p);
\\}
\\
\\fn nonFailing() anyframe->anyerror!void {
\\ failing_frame = async failing();
\\ return &failing_frame;
\\}
\\
\\fn failing() anyerror!void {
\\ suspend {}
\\ return second();
\\}
\\
\\fn second() callconv(.Async) anyerror!void {
\\ return error.Fail;
\\}
\\
\\fn printTrace(p: anyframe->anyerror!void) void {
\\ (await p) catch unreachable;
\\}
);
// Slicing a C pointer returns a non-allowzero slice, thus we need to emit
// a safety check to ensure the pointer is not null.
cases.addRuntimeSafety("slicing null C pointer",
\\const std = @import("std");
\\pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
\\ std.os.exit(126);
\\}
\\
\\pub fn main() void {
\\ var ptr: [*c]const u32 = null;
\\ var slice = ptr[0..3];
\\}
);
}