diff --git a/lib/compiler/test_runner.zig b/lib/compiler/test_runner.zig
index ac9629a57d..83d53626c3 100644
--- a/lib/compiler/test_runner.zig
+++ b/lib/compiler/test_runner.zig
@@ -145,31 +145,23 @@ fn mainServer() !void {
.start_fuzzing => {
if (!builtin.fuzz) unreachable;
const index = try server.receiveBody_u32();
- var first = true;
const test_fn = builtin.test_functions[index];
- while (true) {
- testing.allocator_instance = .{};
- defer if (testing.allocator_instance.deinit() == .leak) std.process.exit(1);
- log_err_count = 0;
- is_fuzz_test = false;
- test_fn.func() catch |err| switch (err) {
- error.SkipZigTest => continue,
- else => {
- if (@errorReturnTrace()) |trace| {
- std.debug.dumpStackTrace(trace.*);
- }
- std.debug.print("failed with error.{s}\n", .{@errorName(err)});
- std.process.exit(1);
- },
- };
- if (!is_fuzz_test) @panic("missed call to std.testing.fuzzInput");
- if (log_err_count != 0) @panic("error logs detected");
- if (first) {
- first = false;
- const entry_addr = @intFromPtr(test_fn.func);
- try server.serveU64Message(.fuzz_start_addr, entry_addr);
- }
- }
+ const entry_addr = @intFromPtr(test_fn.func);
+ try server.serveU64Message(.fuzz_start_addr, entry_addr);
+ defer if (testing.allocator_instance.deinit() == .leak) std.process.exit(1);
+ is_fuzz_test = false;
+ test_fn.func() catch |err| switch (err) {
+ error.SkipZigTest => return,
+ else => {
+ if (@errorReturnTrace()) |trace| {
+ std.debug.dumpStackTrace(trace.*);
+ }
+ std.debug.print("failed with error.{s}\n", .{@errorName(err)});
+ std.process.exit(1);
+ },
+ };
+ if (!is_fuzz_test) @panic("missed call to std.testing.fuzz");
+ if (log_err_count != 0) @panic("error logs detected");
},
else => {
@@ -349,19 +341,72 @@ const FuzzerSlice = extern struct {
var is_fuzz_test: bool = undefined;
-extern fn fuzzer_next() FuzzerSlice;
+extern fn fuzzer_start(testOne: *const fn ([*]const u8, usize) callconv(.C) void) void;
extern fn fuzzer_init(cache_dir: FuzzerSlice) void;
extern fn fuzzer_coverage_id() u64;
-pub fn fuzzInput(options: testing.FuzzInputOptions) []const u8 {
+pub fn fuzz(
+ comptime testOne: fn ([]const u8) anyerror!void,
+ options: testing.FuzzInputOptions,
+) anyerror!void {
+ // Prevent this function from confusing the fuzzer by omitting its own code
+ // coverage from being considered.
@disableInstrumentation();
- if (crippled) return "";
+
+ // Some compiler backends are not capable of handling fuzz testing yet but
+ // we still want CI test coverage enabled.
+ if (crippled) return;
+
+ // Smoke test to ensure the test did not use conditional compilation to
+ // contradict itself by making it not actually be a fuzz test when the test
+ // is built in fuzz mode.
is_fuzz_test = true;
+
+ // Ensure no test failure occurred before starting fuzzing.
+ if (log_err_count != 0) @panic("error logs detected");
+
+ // libfuzzer is in a separate compilation unit so that its own code can be
+ // excluded from code coverage instrumentation. It needs a function pointer
+ // it can call for checking exactly one input. Inside this function we do
+ // our standard unit test checks such as memory leaks, and interaction with
+ // error logs.
+ const global = struct {
+ fn fuzzer_one(input_ptr: [*]const u8, input_len: usize) callconv(.C) void {
+ @disableInstrumentation();
+ testing.allocator_instance = .{};
+ defer if (testing.allocator_instance.deinit() == .leak) std.process.exit(1);
+ log_err_count = 0;
+ testOne(input_ptr[0..input_len]) catch |err| switch (err) {
+ error.SkipZigTest => return,
+ else => {
+ std.debug.lockStdErr();
+ if (@errorReturnTrace()) |trace| std.debug.dumpStackTrace(trace.*);
+ std.debug.print("failed with error.{s}\n", .{@errorName(err)});
+ std.process.exit(1);
+ },
+ };
+ if (log_err_count != 0) {
+ std.debug.lockStdErr();
+ std.debug.print("error logs detected\n", .{});
+ std.process.exit(1);
+ }
+ }
+ };
if (builtin.fuzz) {
- return fuzzer_next().toSlice();
+ const prev_allocator_state = testing.allocator_instance;
+ testing.allocator_instance = .{};
+ fuzzer_start(&global.fuzzer_one);
+ testing.allocator_instance = prev_allocator_state;
+ return;
}
- if (options.corpus.len == 0) return "";
- var prng = std.Random.DefaultPrng.init(testing.random_seed);
- const random = prng.random();
- return options.corpus[random.uintLessThan(usize, options.corpus.len)];
+
+ // When the unit test executable is not built in fuzz mode, only run the
+ // provided corpus.
+ for (options.corpus) |input| {
+ try testOne(input);
+ }
+
+ // In case there is no provided corpus, also use an empty
+ // string as a smoke test.
+ try testOne("");
}
diff --git a/lib/fuzzer.zig b/lib/fuzzer.zig
index 9c67756a6d..3f8a991148 100644
--- a/lib/fuzzer.zig
+++ b/lib/fuzzer.zig
@@ -28,7 +28,8 @@ fn logOverride(
f.writer().print(prefix1 ++ prefix2 ++ format ++ "\n", args) catch @panic("failed to write to fuzzer log");
}
-export threadlocal var __sancov_lowest_stack: usize = std.math.maxInt(usize);
+/// Helps determine run uniqueness in the face of recursion.
+export threadlocal var __sancov_lowest_stack: usize = 0;
export fn __sanitizer_cov_trace_const_cmp1(arg1: u8, arg2: u8) void {
handleCmp(@returnAddress(), arg1, arg2);
@@ -220,7 +221,6 @@ const Fuzzer = struct {
.n_runs = 0,
.unique_runs = 0,
.pcs_len = pcs.len,
- .lowest_stack = std.math.maxInt(usize),
};
f.seen_pcs.appendSliceAssumeCapacity(std.mem.asBytes(&header));
f.seen_pcs.appendNTimesAssumeCapacity(0, n_bitset_elems * @sizeOf(usize));
@@ -235,22 +235,41 @@ const Fuzzer = struct {
};
}
- fn next(f: *Fuzzer) ![]const u8 {
+ fn start(f: *Fuzzer) !void {
const gpa = f.gpa;
const rng = fuzzer.rng.random();
- if (f.recent_cases.entries.len == 0) {
- // Prepare initial input.
- try f.recent_cases.ensureUnusedCapacity(gpa, 100);
- const len = rng.uintLessThanBiased(usize, 80);
- try f.input.resize(gpa, len);
- rng.bytes(f.input.items);
- f.recent_cases.putAssumeCapacity(.{
- .id = 0,
- .input = try gpa.dupe(u8, f.input.items),
- .score = 0,
- }, {});
- } else {
+ // Prepare initial input.
+ assert(f.recent_cases.entries.len == 0);
+ assert(f.n_runs == 0);
+ try f.recent_cases.ensureUnusedCapacity(gpa, 100);
+ const len = rng.uintLessThanBiased(usize, 80);
+ try f.input.resize(gpa, len);
+ rng.bytes(f.input.items);
+ f.recent_cases.putAssumeCapacity(.{
+ .id = 0,
+ .input = try gpa.dupe(u8, f.input.items),
+ .score = 0,
+ }, {});
+
+ const header: *volatile SeenPcsHeader = @ptrCast(f.seen_pcs.items[0..@sizeOf(SeenPcsHeader)]);
+
+ while (true) {
+ const chosen_index = rng.uintLessThanBiased(usize, f.recent_cases.entries.len);
+ const run = &f.recent_cases.keys()[chosen_index];
+ f.input.clearRetainingCapacity();
+ f.input.appendSliceAssumeCapacity(run.input);
+ try f.mutate();
+
+ @memset(f.pc_counters, 0);
+ __sancov_lowest_stack = std.math.maxInt(usize);
+ f.coverage.reset();
+
+ fuzzer_one(f.input.items.ptr, f.input.items.len);
+
+ f.n_runs += 1;
+ _ = @atomicRmw(usize, &header.n_runs, .Add, 1, .monotonic);
+
if (f.n_runs % 10000 == 0) f.dumpStats();
const analysis = f.analyzeLastRun();
@@ -301,7 +320,6 @@ const Fuzzer = struct {
}
}
- const header: *volatile SeenPcsHeader = @ptrCast(f.seen_pcs.items[0..@sizeOf(SeenPcsHeader)]);
_ = @atomicRmw(usize, &header.unique_runs, .Add, 1, .monotonic);
}
@@ -317,26 +335,12 @@ const Fuzzer = struct {
// This has to be done before deinitializing the deleted items.
const doomed_runs = f.recent_cases.keys()[cap..];
f.recent_cases.shrinkRetainingCapacity(cap);
- for (doomed_runs) |*run| {
- std.log.info("culling score={d} id={d}", .{ run.score, run.id });
- run.deinit(gpa);
+ for (doomed_runs) |*doomed_run| {
+ std.log.info("culling score={d} id={d}", .{ doomed_run.score, doomed_run.id });
+ doomed_run.deinit(gpa);
}
}
}
-
- const chosen_index = rng.uintLessThanBiased(usize, f.recent_cases.entries.len);
- const run = &f.recent_cases.keys()[chosen_index];
- f.input.clearRetainingCapacity();
- f.input.appendSliceAssumeCapacity(run.input);
- try f.mutate();
-
- f.n_runs += 1;
- const header: *volatile SeenPcsHeader = @ptrCast(f.seen_pcs.items[0..@sizeOf(SeenPcsHeader)]);
- _ = @atomicRmw(usize, &header.n_runs, .Add, 1, .monotonic);
- _ = @atomicRmw(usize, &header.lowest_stack, .Min, __sancov_lowest_stack, .monotonic);
- @memset(f.pc_counters, 0);
- f.coverage.reset();
- return f.input.items;
}
fn visitPc(f: *Fuzzer, pc: usize) void {
@@ -419,10 +423,13 @@ export fn fuzzer_coverage_id() u64 {
return fuzzer.coverage_id;
}
-export fn fuzzer_next() Fuzzer.Slice {
- return Fuzzer.Slice.fromZig(fuzzer.next() catch |err| switch (err) {
- error.OutOfMemory => @panic("out of memory"),
- });
+var fuzzer_one: *const fn (input_ptr: [*]const u8, input_len: usize) callconv(.C) void = undefined;
+
+export fn fuzzer_start(testOne: @TypeOf(fuzzer_one)) void {
+ fuzzer_one = testOne;
+ fuzzer.start() catch |err| switch (err) {
+ error.OutOfMemory => fatal("out of memory", .{}),
+ };
}
export fn fuzzer_init(cache_dir_struct: Fuzzer.Slice) void {
@@ -432,24 +439,24 @@ export fn fuzzer_init(cache_dir_struct: Fuzzer.Slice) void {
const pc_counters_start = @extern([*]u8, .{
.name = "__start___sancov_cntrs",
.linkage = .weak,
- }) orelse fatal("missing __start___sancov_cntrs symbol");
+ }) orelse fatal("missing __start___sancov_cntrs symbol", .{});
const pc_counters_end = @extern([*]u8, .{
.name = "__stop___sancov_cntrs",
.linkage = .weak,
- }) orelse fatal("missing __stop___sancov_cntrs symbol");
+ }) orelse fatal("missing __stop___sancov_cntrs symbol", .{});
const pc_counters = pc_counters_start[0 .. pc_counters_end - pc_counters_start];
const pcs_start = @extern([*]usize, .{
.name = "__start___sancov_pcs1",
.linkage = .weak,
- }) orelse fatal("missing __start___sancov_pcs1 symbol");
+ }) orelse fatal("missing __start___sancov_pcs1 symbol", .{});
const pcs_end = @extern([*]usize, .{
.name = "__stop___sancov_pcs1",
.linkage = .weak,
- }) orelse fatal("missing __stop___sancov_pcs1 symbol");
+ }) orelse fatal("missing __stop___sancov_pcs1 symbol", .{});
const pcs = pcs_start[0 .. pcs_end - pcs_start];
diff --git a/lib/fuzzer/index.html b/lib/fuzzer/web/index.html
similarity index 98%
rename from lib/fuzzer/index.html
rename to lib/fuzzer/web/index.html
index 16fa879913..325342e8eb 100644
--- a/lib/fuzzer/index.html
+++ b/lib/fuzzer/web/index.html
@@ -146,8 +146,8 @@
- Total Runs:
- Unique Runs:
+ - Speed (Runs/Second):
- Coverage:
- - Lowest Stack:
- Entry Points:
diff --git a/lib/fuzzer/main.js b/lib/fuzzer/web/main.js
similarity index 97%
rename from lib/fuzzer/main.js
rename to lib/fuzzer/web/main.js
index ce02276f98..94f09391bb 100644
--- a/lib/fuzzer/main.js
+++ b/lib/fuzzer/web/main.js
@@ -5,8 +5,8 @@
const domSourceText = document.getElementById("sourceText");
const domStatTotalRuns = document.getElementById("statTotalRuns");
const domStatUniqueRuns = document.getElementById("statUniqueRuns");
+ const domStatSpeed = document.getElementById("statSpeed");
const domStatCoverage = document.getElementById("statCoverage");
- const domStatLowestStack = document.getElementById("statLowestStack");
const domEntryPointsList = document.getElementById("entryPointsList");
let wasm_promise = fetch("main.wasm");
@@ -32,6 +32,9 @@
const msg = decodeString(ptr, len);
throw new Error("panic: " + msg);
},
+ timestamp: function () {
+ return BigInt(new Date());
+ },
emitSourceIndexChange: onSourceIndexChange,
emitCoverageUpdate: onCoverageUpdate,
emitEntryPointsUpdate: renderStats,
@@ -158,7 +161,7 @@
domStatTotalRuns.innerText = totalRuns;
domStatUniqueRuns.innerText = uniqueRuns + " (" + percent(uniqueRuns, totalRuns) + "%)";
domStatCoverage.innerText = coveredSourceLocations + " / " + totalSourceLocations + " (" + percent(coveredSourceLocations, totalSourceLocations) + "%)";
- domStatLowestStack.innerText = unwrapString(wasm_exports.lowestStack());
+ domStatSpeed.innerText = wasm_exports.totalRunsPerSecond().toFixed(0);
const entryPoints = unwrapInt32Array(wasm_exports.entryPoints());
resizeDomList(domEntryPointsList, entryPoints.length, "");
diff --git a/lib/fuzzer/wasm/main.zig b/lib/fuzzer/web/main.zig
similarity index 92%
rename from lib/fuzzer/wasm/main.zig
rename to lib/fuzzer/web/main.zig
index 342adc3b56..9c50704e8a 100644
--- a/lib/fuzzer/wasm/main.zig
+++ b/lib/fuzzer/web/main.zig
@@ -10,9 +10,17 @@ const Walk = @import("Walk");
const Decl = Walk.Decl;
const html_render = @import("html_render");
+/// Nanoseconds.
+var server_base_timestamp: i64 = 0;
+/// Milliseconds.
+var client_base_timestamp: i64 = 0;
+/// Relative to `server_base_timestamp`.
+var start_fuzzing_timestamp: i64 = undefined;
+
const js = struct {
extern "js" fn log(ptr: [*]const u8, len: usize) void;
extern "js" fn panic(ptr: [*]const u8, len: usize) noreturn;
+ extern "js" fn timestamp() i64;
extern "js" fn emitSourceIndexChange() void;
extern "js" fn emitCoverageUpdate() void;
extern "js" fn emitEntryPointsUpdate() void;
@@ -64,6 +72,7 @@ export fn message_end() void {
const tag: abi.ToClientTag = @enumFromInt(msg_bytes[0]);
switch (tag) {
+ .current_time => return currentTimeMessage(msg_bytes),
.source_index => return sourceIndexMessage(msg_bytes) catch @panic("OOM"),
.coverage_update => return coverageUpdateMessage(msg_bytes) catch @panic("OOM"),
.entry_points => return entryPointsMessage(msg_bytes) catch @panic("OOM"),
@@ -106,13 +115,6 @@ export fn decl_source_html(decl_index: Decl.Index) String {
return String.init(string_result.items);
}
-export fn lowestStack() String {
- const header: *abi.CoverageUpdateHeader = @ptrCast(recent_coverage_update.items[0..@sizeOf(abi.CoverageUpdateHeader)]);
- string_result.clearRetainingCapacity();
- string_result.writer(gpa).print("0x{d}", .{header.lowest_stack}) catch @panic("OOM");
- return String.init(string_result.items);
-}
-
export fn totalSourceLocations() usize {
return coverage_source_locations.items.len;
}
@@ -124,16 +126,28 @@ export fn coveredSourceLocations() usize {
return count;
}
+fn getCoverageUpdateHeader() *abi.CoverageUpdateHeader {
+ return @alignCast(@ptrCast(recent_coverage_update.items[0..@sizeOf(abi.CoverageUpdateHeader)]));
+}
+
export fn totalRuns() u64 {
- const header: *abi.CoverageUpdateHeader = @alignCast(@ptrCast(recent_coverage_update.items[0..@sizeOf(abi.CoverageUpdateHeader)]));
+ const header = getCoverageUpdateHeader();
return header.n_runs;
}
export fn uniqueRuns() u64 {
- const header: *abi.CoverageUpdateHeader = @alignCast(@ptrCast(recent_coverage_update.items[0..@sizeOf(abi.CoverageUpdateHeader)]));
+ const header = getCoverageUpdateHeader();
return header.unique_runs;
}
+export fn totalRunsPerSecond() f64 {
+ @setFloatMode(.optimized);
+ const header = getCoverageUpdateHeader();
+ const ns_elapsed: f64 = @floatFromInt(nsSince(start_fuzzing_timestamp));
+ const n_runs: f64 = @floatFromInt(header.n_runs);
+ return n_runs / (ns_elapsed / std.time.ns_per_s);
+}
+
const String = Slice(u8);
fn Slice(T: type) type {
@@ -196,6 +210,18 @@ fn fatal(comptime format: []const u8, args: anytype) noreturn {
js.panic(line.ptr, line.len);
}
+fn currentTimeMessage(msg_bytes: []u8) void {
+ client_base_timestamp = js.timestamp();
+ server_base_timestamp = @bitCast(msg_bytes[1..][0..8].*);
+}
+
+/// Nanoseconds passed since a server timestamp.
+fn nsSince(server_timestamp: i64) i64 {
+ const ms_passed = js.timestamp() - client_base_timestamp;
+ const ns_passed = server_base_timestamp - server_timestamp;
+ return ns_passed + ms_passed * std.time.ns_per_ms;
+}
+
fn sourceIndexMessage(msg_bytes: []u8) error{OutOfMemory}!void {
const Header = abi.SourceIndexHeader;
const header: Header = @bitCast(msg_bytes[0..@sizeOf(Header)].*);
@@ -212,6 +238,7 @@ fn sourceIndexMessage(msg_bytes: []u8) error{OutOfMemory}!void {
const files: []const Coverage.File = @alignCast(std.mem.bytesAsSlice(Coverage.File, msg_bytes[files_start..files_end]));
const source_locations: []const Coverage.SourceLocation = @alignCast(std.mem.bytesAsSlice(Coverage.SourceLocation, msg_bytes[source_locations_start..source_locations_end]));
+ start_fuzzing_timestamp = header.start_timestamp;
try updateCoverage(directories, files, source_locations, string_bytes);
js.emitSourceIndexChange();
}
diff --git a/lib/init/src/main.zig b/lib/init/src/main.zig
index 0c4bb73429..ba5a2ccef2 100644
--- a/lib/init/src/main.zig
+++ b/lib/init/src/main.zig
@@ -27,7 +27,11 @@ test "simple test" {
}
test "fuzz example" {
- // Try passing `--fuzz` to `zig build test` and see if it manages to fail this test case!
- const input_bytes = std.testing.fuzzInput(.{});
- try std.testing.expect(!std.mem.eql(u8, "canyoufindme", input_bytes));
+ const global = struct {
+ fn testOne(input: []const u8) anyerror!void {
+ // Try passing `--fuzz` to `zig build test` and see if it manages to fail this test case!
+ try std.testing.expect(!std.mem.eql(u8, "canyoufindme", input));
+ }
+ };
+ try std.testing.fuzz(global.testOne, .{});
}
diff --git a/lib/std/Build/Fuzz.zig b/lib/std/Build/Fuzz.zig
index 23f8a02692..6258f4cdda 100644
--- a/lib/std/Build/Fuzz.zig
+++ b/lib/std/Build/Fuzz.zig
@@ -66,6 +66,8 @@ pub fn start(
.coverage_files = .{},
.coverage_mutex = .{},
.coverage_condition = .{},
+
+ .base_timestamp = std.time.nanoTimestamp(),
};
// For accepting HTTP connections.
diff --git a/lib/std/Build/Fuzz/WebServer.zig b/lib/std/Build/Fuzz/WebServer.zig
index a0ab018cf5..fb78e96abb 100644
--- a/lib/std/Build/Fuzz/WebServer.zig
+++ b/lib/std/Build/Fuzz/WebServer.zig
@@ -33,6 +33,9 @@ coverage_mutex: std.Thread.Mutex,
/// Signaled when `coverage_files` changes.
coverage_condition: std.Thread.Condition,
+/// Time at initialization of WebServer.
+base_timestamp: i128,
+
const fuzzer_bin_name = "fuzzer";
const fuzzer_arch_os_abi = "wasm32-freestanding";
const fuzzer_cpu_features = "baseline+atomics+bulk_memory+multivalue+mutable_globals+nontrapping_fptoint+reference_types+sign_ext";
@@ -43,6 +46,7 @@ const CoverageMap = struct {
source_locations: []Coverage.SourceLocation,
/// Elements are indexes into `source_locations` pointing to the unit tests that are being fuzz tested.
entry_points: std.ArrayListUnmanaged(u32),
+ start_timestamp: i64,
fn deinit(cm: *CoverageMap, gpa: Allocator) void {
std.posix.munmap(cm.mapped_memory);
@@ -87,6 +91,10 @@ pub fn run(ws: *WebServer) void {
}
}
+fn now(s: *const WebServer) i64 {
+ return @intCast(std.time.nanoTimestamp() - s.base_timestamp);
+}
+
fn accept(ws: *WebServer, connection: std.net.Server.Connection) void {
defer connection.stream.close();
@@ -128,11 +136,11 @@ fn serveRequest(ws: *WebServer, request: *std.http.Server.Request) !void {
std.mem.eql(u8, request.head.target, "/debug") or
std.mem.eql(u8, request.head.target, "/debug/"))
{
- try serveFile(ws, request, "fuzzer/index.html", "text/html");
+ try serveFile(ws, request, "fuzzer/web/index.html", "text/html");
} else if (std.mem.eql(u8, request.head.target, "/main.js") or
std.mem.eql(u8, request.head.target, "/debug/main.js"))
{
- try serveFile(ws, request, "fuzzer/main.js", "application/javascript");
+ try serveFile(ws, request, "fuzzer/web/main.js", "application/javascript");
} else if (std.mem.eql(u8, request.head.target, "/main.wasm")) {
try serveWasm(ws, request, .ReleaseFast);
} else if (std.mem.eql(u8, request.head.target, "/debug/main.wasm")) {
@@ -217,7 +225,7 @@ fn buildWasmBinary(
const main_src_path: Build.Cache.Path = .{
.root_dir = ws.zig_lib_directory,
- .sub_path = "fuzzer/wasm/main.zig",
+ .sub_path = "fuzzer/web/main.zig",
};
const walk_src_path: Build.Cache.Path = .{
.root_dir = ws.zig_lib_directory,
@@ -381,6 +389,13 @@ fn serveWebSocket(ws: *WebServer, web_socket: *std.http.WebSocket) !void {
ws.coverage_mutex.lock();
defer ws.coverage_mutex.unlock();
+ // On first connection, the client needs to know what time the server
+ // thinks it is to rebase timestamps.
+ {
+ const timestamp_message: abi.CurrentTime = .{ .base = ws.now() };
+ try web_socket.writeMessage(std.mem.asBytes(×tamp_message), .binary);
+ }
+
// On first connection, the client needs all the coverage information
// so that subsequent updates can contain only the updated bits.
var prev_unique_runs: usize = 0;
@@ -406,7 +421,6 @@ fn sendCoverageContext(
const seen_pcs = cov_header.seenBits();
const n_runs = @atomicLoad(usize, &cov_header.n_runs, .monotonic);
const unique_runs = @atomicLoad(usize, &cov_header.unique_runs, .monotonic);
- const lowest_stack = @atomicLoad(usize, &cov_header.lowest_stack, .monotonic);
if (prev_unique_runs.* != unique_runs) {
// There has been an update.
if (prev_unique_runs.* == 0) {
@@ -417,6 +431,7 @@ fn sendCoverageContext(
.files_len = @intCast(coverage_map.coverage.files.entries.len),
.source_locations_len = @intCast(coverage_map.source_locations.len),
.string_bytes_len = @intCast(coverage_map.coverage.string_bytes.items.len),
+ .start_timestamp = coverage_map.start_timestamp,
};
const iovecs: [5]std.posix.iovec_const = .{
makeIov(std.mem.asBytes(&header)),
@@ -431,7 +446,6 @@ fn sendCoverageContext(
const header: abi.CoverageUpdateHeader = .{
.n_runs = n_runs,
.unique_runs = unique_runs,
- .lowest_stack = lowest_stack,
};
const iovecs: [2]std.posix.iovec_const = .{
makeIov(std.mem.asBytes(&header)),
@@ -584,6 +598,7 @@ fn prepareTables(
.mapped_memory = undefined, // populated below
.source_locations = undefined, // populated below
.entry_points = .{},
+ .start_timestamp = ws.now(),
};
errdefer gop.value_ptr.coverage.deinit(gpa);
diff --git a/lib/std/Build/Fuzz/abi.zig b/lib/std/Build/Fuzz/abi.zig
index 0e16f0d5fa..a6abc13fee 100644
--- a/lib/std/Build/Fuzz/abi.zig
+++ b/lib/std/Build/Fuzz/abi.zig
@@ -13,7 +13,6 @@ pub const SeenPcsHeader = extern struct {
n_runs: usize,
unique_runs: usize,
pcs_len: usize,
- lowest_stack: usize,
/// Used for comptime assertions. Provides a mechanism for strategically
/// causing compile errors.
@@ -44,12 +43,19 @@ pub const SeenPcsHeader = extern struct {
};
pub const ToClientTag = enum(u8) {
+ current_time,
source_index,
coverage_update,
entry_points,
_,
};
+pub const CurrentTime = extern struct {
+ tag: ToClientTag = .current_time,
+ /// Number of nanoseconds that all other timestamps are in reference to.
+ base: i64 align(1),
+};
+
/// Sent to the fuzzer web client on first connection to the websocket URL.
///
/// Trailing:
@@ -63,6 +69,8 @@ pub const SourceIndexHeader = extern struct {
files_len: u32,
source_locations_len: u32,
string_bytes_len: u32,
+ /// When, according to the server, fuzzing started.
+ start_timestamp: i64 align(4),
pub const Flags = packed struct(u32) {
tag: ToClientTag = .source_index,
@@ -79,7 +87,6 @@ pub const CoverageUpdateHeader = extern struct {
flags: Flags = .{},
n_runs: u64,
unique_runs: u64,
- lowest_stack: u64,
pub const Flags = packed struct(u64) {
tag: ToClientTag = .coverage_update,
diff --git a/lib/std/testing.zig b/lib/std/testing.zig
index 35bb13bf0d..2cc38749eb 100644
--- a/lib/std/testing.zig
+++ b/lib/std/testing.zig
@@ -1141,6 +1141,10 @@ pub const FuzzInputOptions = struct {
corpus: []const []const u8 = &.{},
};
-pub inline fn fuzzInput(options: FuzzInputOptions) []const u8 {
- return @import("root").fuzzInput(options);
+/// Inline to avoid coverage instrumentation.
+pub inline fn fuzz(
+ comptime testOne: fn (input: []const u8) anyerror!void,
+ options: FuzzInputOptions,
+) anyerror!void {
+ return @import("root").fuzz(testOne, options);
}
diff --git a/lib/std/zig/tokenizer.zig b/lib/std/zig/tokenizer.zig
index 06c6b859ac..db69693a93 100644
--- a/lib/std/zig/tokenizer.zig
+++ b/lib/std/zig/tokenizer.zig
@@ -1708,6 +1708,10 @@ test "invalid tabs and carriage returns" {
try testTokenize("\rpub\rswitch\r", &.{ .keyword_pub, .keyword_switch });
}
+test "fuzzable properties upheld" {
+ return std.testing.fuzz(testPropertiesUpheld, .{});
+}
+
fn testTokenize(source: [:0]const u8, expected_token_tags: []const Token.Tag) !void {
var tokenizer = Tokenizer.init(source);
for (expected_token_tags) |expected_token_tag| {
@@ -1723,8 +1727,7 @@ fn testTokenize(source: [:0]const u8, expected_token_tags: []const Token.Tag) !v
try std.testing.expectEqual(source.len, last_token.loc.end);
}
-test "fuzzable properties upheld" {
- const source = std.testing.fuzzInput(.{});
+fn testPropertiesUpheld(source: []const u8) anyerror!void {
const source0 = try std.testing.allocator.dupeZ(u8, source);
defer std.testing.allocator.free(source0);
var tokenizer = Tokenizer.init(source0);