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const builtin = @import("builtin");
const std = @import("../std.zig");
const Build = std.Build;
const Step = std.Build.Step;
const assert = std.debug.assert;
const fatal = std.process.fatal;
const Allocator = std.mem.Allocator;
const log = std.log;
const Fuzz = @This();
const build_runner = @import("root");
pub const WebServer = @import("Fuzz/WebServer.zig");
pub const abi = @import("Fuzz/abi.zig");
pub fn start(
gpa: Allocator,
arena: Allocator,
global_cache_directory: Build.Cache.Directory,
zig_lib_directory: Build.Cache.Directory,
zig_exe_path: []const u8,
thread_pool: *std.Thread.Pool,
all_steps: []const *Step,
ttyconf: std.io.tty.Config,
listen_address: std.net.Address,
prog_node: std.Progress.Node,
) Allocator.Error!void {
const fuzz_run_steps = block: {
const rebuild_node = prog_node.start("Rebuilding Unit Tests", 0);
defer rebuild_node.end();
var wait_group: std.Thread.WaitGroup = .{};
defer wait_group.wait();
var fuzz_run_steps: std.ArrayListUnmanaged(*Step.Run) = .empty;
defer fuzz_run_steps.deinit(gpa);
for (all_steps) |step| {
const run = step.cast(Step.Run) orelse continue;
if (run.fuzz_tests.items.len > 0 and run.producer != null) {
thread_pool.spawnWg(&wait_group, rebuildTestsWorkerRun, .{ run, ttyconf, rebuild_node });
try fuzz_run_steps.append(gpa, run);
}
}
if (fuzz_run_steps.items.len == 0) fatal("no fuzz tests found", .{});
rebuild_node.setEstimatedTotalItems(fuzz_run_steps.items.len);
break :block try arena.dupe(*Step.Run, fuzz_run_steps.items);
};
// Detect failure.
for (fuzz_run_steps) |run| {
assert(run.fuzz_tests.items.len > 0);
if (run.rebuilt_executable == null)
fatal("one or more unit tests failed to be rebuilt in fuzz mode", .{});
}
var web_server: WebServer = .{
.gpa = gpa,
.global_cache_directory = global_cache_directory,
.zig_lib_directory = zig_lib_directory,
.zig_exe_path = zig_exe_path,
.listen_address = listen_address,
.fuzz_run_steps = fuzz_run_steps,
.msg_queue = .{},
.mutex = .{},
.condition = .{},
.coverage_files = .{},
.coverage_mutex = .{},
.coverage_condition = .{},
.base_timestamp = std.time.nanoTimestamp(),
};
// For accepting HTTP connections.
const web_server_thread = std.Thread.spawn(.{}, WebServer.run, .{&web_server}) catch |err| {
fatal("unable to spawn web server thread: {s}", .{@errorName(err)});
};
defer web_server_thread.join();
// For polling messages and sending updates to subscribers.
const coverage_thread = std.Thread.spawn(.{}, WebServer.coverageRun, .{&web_server}) catch |err| {
fatal("unable to spawn coverage thread: {s}", .{@errorName(err)});
};
defer coverage_thread.join();
{
const fuzz_node = prog_node.start("Fuzzing", fuzz_run_steps.len);
defer fuzz_node.end();
var wait_group: std.Thread.WaitGroup = .{};
defer wait_group.wait();
for (fuzz_run_steps) |run| {
for (run.fuzz_tests.items) |unit_test_index| {
assert(run.rebuilt_executable != null);
thread_pool.spawnWg(&wait_group, fuzzWorkerRun, .{
run, &web_server, unit_test_index, ttyconf, fuzz_node,
});
}
}
}
log.err("all fuzz workers crashed", .{});
}
fn rebuildTestsWorkerRun(run: *Step.Run, ttyconf: std.io.tty.Config, parent_prog_node: std.Progress.Node) void {
rebuildTestsWorkerRunFallible(run, ttyconf, parent_prog_node) catch |err| {
const compile = run.producer.?;
log.err("step '{s}': failed to rebuild in fuzz mode: {s}", .{
compile.step.name, @errorName(err),
});
};
}
fn rebuildTestsWorkerRunFallible(run: *Step.Run, ttyconf: std.io.tty.Config, parent_prog_node: std.Progress.Node) !void {
const gpa = run.step.owner.allocator;
const stderr = std.io.getStdErr();
const compile = run.producer.?;
const prog_node = parent_prog_node.start(compile.step.name, 0);
defer prog_node.end();
const result = compile.rebuildInFuzzMode(prog_node);
const show_compile_errors = compile.step.result_error_bundle.errorMessageCount() > 0;
const show_error_msgs = compile.step.result_error_msgs.items.len > 0;
const show_stderr = compile.step.result_stderr.len > 0;
if (show_error_msgs or show_compile_errors or show_stderr) {
std.debug.lockStdErr();
defer std.debug.unlockStdErr();
build_runner.printErrorMessages(gpa, &compile.step, ttyconf, stderr, false) catch {};
}
const rebuilt_bin_path = result catch |err| switch (err) {
error.MakeFailed => return,
else => |other| return other,
};
run.rebuilt_executable = try rebuilt_bin_path.join(gpa, compile.out_filename);
}
fn fuzzWorkerRun(
run: *Step.Run,
web_server: *WebServer,
unit_test_index: u32,
ttyconf: std.io.tty.Config,
parent_prog_node: std.Progress.Node,
) void {
const gpa = run.step.owner.allocator;
const test_name = run.cached_test_metadata.?.testName(unit_test_index);
const prog_node = parent_prog_node.start(test_name, 0);
defer prog_node.end();
run.rerunInFuzzMode(web_server, unit_test_index, prog_node) catch |err| switch (err) {
error.MakeFailed => {
const stderr = std.io.getStdErr();
std.debug.lockStdErr();
defer std.debug.unlockStdErr();
build_runner.printErrorMessages(gpa, &run.step, ttyconf, stderr, false) catch {};
return;
},
else => {
log.err("step '{s}': failed to rerun '{s}' in fuzz mode: {s}", .{
run.step.name, test_name, @errorName(err),
});
return;
},
};
}
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