Commit af18634753b3671d998ad6064e1f6c3ad9bbc6eb | lib/zig/tracer

author	Meghan Denny <hello@nektro.net> 2026-04-25 21:15:16 -07:00
committer	Meghan Denny <hello@nektro.net> 2026-04-25 21:15:16 -07:00
log	af18634753b3671d998ad6064e1f6c3ad9bbc6eb
tree	d7490a3a2a81efb36ac6957c29c0cf37461ac288
parent	75d814d188bc5969d066ab3b5e19aa55f5aa2434
signature	Signed by SSH key SHA256:4hHJbtBRU58AYXwjL7fkz2fnQHdiye8x1QpTCQ0sHNw

further migration to zig-sys

8 files changed, 45 insertions(+), 25 deletions(-)

licenses.txt+6

...	...	@@ -3,6 +3,12 @@ MIT:
3	3	- This
4	4	- git https://github.com/nektro/zig-extras
5	5	- git https://github.com/nektro/zig-sys-linux
	6	- git https://github.com/nektro/zig-time
	7
	8	MPL-2.0:
	9	= https://spdx.org/licenses/MPL-2.0
	10	- git https://github.com/nektro/zig-nfs
	11	- git https://github.com/nektro/zig-nio
6	12
7	13	Unspecified:
8	14	- system_lib c

src/chrome.zig+12-10

...	...	@@ -3,13 +3,15 @@ const tracer = @import("./mod.zig");
3	3	const alloc = std.heap.c_allocator;
4	4	const log = std.log.scoped(.tracer);
5	5	const root = @import("root");
	6	const nfs = @import("nfs");
	7	const nio = @import("nio");
6	8	const linux = @import("sys-linux");
7	9
8	10	var pid: linux.pid_t = undefined;
9	11	threadlocal var tid: linux.pid_t = undefined;
10		threadlocal var path: []const u8 = undefined;
11		threadlocal var file: std.fs.File = undefined;
12		threadlocal var buffered_writer: std.io.BufferedWriter(4096, std.fs.File.Writer) = undefined;
	12	threadlocal var path: [:0]const u8 = undefined;
	13	threadlocal var file: nfs.File = undefined;
	14	threadlocal var buffered_writer: nio.BufferedWriter(4096, nfs.File) = undefined;
13	15
14	16	pub fn init() !void {
15	17	pid = linux.getpid();
...	...	@@ -19,26 +21,26 @@ pub fn deinit() void {
19	21	//
20	22	}
21	23
22		pub fn init_thread(dir: std.fs.Dir) !void {
	24	pub fn init_thread(dir: nfs.Dir) !void {
23	25	tid = linux.gettid();
24	26
25		path = try std.fmt.allocPrint(alloc, "trace.{d}.{d}.chrome.json", .{ pid, tid });
	27	path = try std.fmt.allocPrintZ(alloc, "trace.{d}.{d}.chrome.json", .{ pid, tid });
26	28	file = try dir.createFile(path, .{});
27		buffered_writer = std.io.bufferedWriter(file.writer());
	29	buffered_writer = .init(file);
28	30
29		try buffered_writer.writer().writeAll("[\n");
	31	try buffered_writer.writeAll("[\n");
30	32	}
31	33
32	34	pub fn deinit_thread() void {
33	35	defer alloc.free(path);
34	36	defer file.close();
35	37
36		buffered_writer.writer().writeAll("]\n") catch {};
	38	buffered_writer.writeAll("]\n") catch {};
37	39	buffered_writer.flush() catch {};
38	40	}
39	41
40	42	pub inline fn trace_begin(ctx: tracer.Ctx, comptime ifmt: []const u8, iargs: anytype) void {
41		buffered_writer.writer().print(
	43	buffered_writer.print(
42	44	\\{{"cat":"function", "name":"{s}:{d}:{d} ({s})
43	45	++ ifmt ++
44	46	\\", "ph": "B", "pid": {d}, "tid": {d}, "ts": {d}}},
...	...	@@ -59,7 +61,7 @@ pub inline fn trace_begin(ctx: tracer.Ctx, comptime ifmt: []const u8, iargs: any
59	61
60	62	pub inline fn trace_end(ctx: tracer.Ctx) void {
61	63	_ = ctx;
62		buffered_writer.writer().print(
	64	buffered_writer.print(
63	65	\\{{"cat":"function", "ph": "E", "pid": {d}, "tid": {d}, "ts": {d}}},
64	66	\\
65	67	,

src/log.zig+2-1

...	...	@@ -1,12 +1,13 @@
1	1	const std = @import("std");
2	2	const tracer = @import("./mod.zig");
3	3	const log = std.log.scoped(.tracer);
	4	const nfs = @import("nfs");
4	5
5	6	pub fn init() !void {}
6	7
7	8	pub fn deinit() void {}
8	9
9		pub fn init_thread(dir: std.fs.Dir) !void {
	10	pub fn init_thread(dir: nfs.Dir) !void {
10	11	_ = dir;
11	12	}
12	13

src/main.zig+3-1

...	...	@@ -1,5 +1,7 @@
1	1	const std = @import("std");
2	2	const tracer = @import("tracer");
	3	const nfs = @import("nfs");
	4
3	5	pub const build_options = @import("build_options");
4	6
5	7	pub const tracer_impl = switch (build_options.backend) {
...	...	@@ -18,7 +20,7 @@ pub fn main() !void {
18	20	var go = false;
19	21	_ = &go;
20	22	while (go) {
21		try tracer.init_thread(std.fs.cwd());
	23	try tracer.init_thread(nfs.cwd());
22	24	defer tracer.deinit_thread();
23	25
24	26	handler();

src/mod.zig+3-2

...	...	@@ -1,6 +1,7 @@
1	1	const std = @import("std");
2	2	const root = @import("root");
3	3	const extras = @import("extras");
	4	const nfs = @import("nfs");
4	5	const impl = extras.globalOption("tracer_impl", type) orelse none;
5	6
6	7	threadlocal var started = false;
...	...	@@ -18,8 +19,8 @@ pub fn deinit() void {
18	19	impl.deinit();
19	20	}
20	21
21		pub fn init_thread(dir: ?std.fs.Dir) !void {
22		try impl.init_thread(dir orelse std.fs.cwd());
	22	pub fn init_thread(dir: ?nfs.Dir) !void {
	23	try impl.init_thread(dir orelse nfs.cwd());
23	24	started = true;
24	25	}
25	26

src/none.zig+2-1

...	...	@@ -1,12 +1,13 @@
1	1	const std = @import("std");
2	2	const tracer = @import("./mod.zig");
3	3	const log = std.log.scoped(.tracer);
	4	const nfs = @import("nfs");
4	5
5	6	pub fn init() !void {}
6	7
7	8	pub fn deinit() void {}
8	9
9		pub fn init_thread(dir: std.fs.Dir) !void {
	10	pub fn init_thread(dir: nfs.Dir) !void {
10	11	_ = dir;
11	12	}
12	13

src/spall.zig+12-10

...	...	@@ -3,13 +3,15 @@ const tracer = @import("./mod.zig");
3	3	const alloc = std.heap.c_allocator;
4	4	const log = std.log.scoped(.tracer);
5	5	const root = @import("root");
	6	const nfs = @import("nfs");
	7	const nio = @import("nio");
6	8	const linux = @import("sys-linux");
7	9
8	10	var pid: linux.pid_t = undefined;
9	11	threadlocal var tid: linux.pid_t = undefined;
10		threadlocal var path: []const u8 = undefined;
11		threadlocal var file: std.fs.File = undefined;
12		threadlocal var buffered_writer: std.io.BufferedWriter(4096, std.fs.File.Writer) = undefined;
	12	threadlocal var path: [:0]const u8 = undefined;
	13	threadlocal var file: nfs.File = undefined;
	14	threadlocal var buffered_writer: nio.BufferedWriter(4096, nfs.File) = undefined;
13	15
14	16	pub fn init() !void {
15	17	pid = linux.getpid();
...	...	@@ -19,14 +21,14 @@ pub fn deinit() void {
19	21	//
20	22	}
21	23
22		pub fn init_thread(dir: std.fs.Dir) !void {
	24	pub fn init_thread(dir: nfs.Dir) !void {
23	25	tid = linux.gettid();
24	26
25		path = try std.fmt.allocPrint(alloc, "{d}.{d}.spall", .{ pid, tid });
	27	path = try std.fmt.allocPrintZ(alloc, "{d}.{d}.spall", .{ pid, tid });
26	28	file = try dir.createFile(path, .{});
27		buffered_writer = std.io.bufferedWriter(file.writer());
	29	buffered_writer = .init(file);
28	30
29		try buffered_writer.writer().writeStruct(Header{});
	31	try buffered_writer.writeStruct(Header{});
30	32	}
31	33
32	34	pub fn deinit_thread() void {
...	...	@@ -39,19 +41,19 @@ pub fn deinit_thread() void {
39	41	pub inline fn trace_begin(ctx: tracer.Ctx, comptime ifmt: []const u8, iargs: anytype) void {
40	42	const fmt = "{s}:{d}:{d} ({s})" ++ ifmt;
41	43	const args = .{ ctx.src.file, ctx.src.line, ctx.src.column, ctx.src.fn_name };
42		buffered_writer.writer().writeStruct(BeginEvent{
	44	buffered_writer.writeStruct(BeginEvent{
43	45	.pid = @intCast(pid),
44	46	.tid = @intCast(tid),
45	47	.time = @floatFromInt(std.time.microTimestamp()),
46	48	.name_len = @truncate(std.fmt.count(fmt, args ++ iargs)),
47	49	.args_len = 0,
48	50	}) catch return;
49		buffered_writer.writer().print(fmt, args ++ iargs) catch return;
	51	buffered_writer.print(fmt, args ++ iargs) catch return;
50	52	}
51	53
52	54	pub inline fn trace_end(ctx: tracer.Ctx) void {
53	55	_ = ctx;
54		buffered_writer.writer().writeStruct(EndEvent{
	56	buffered_writer.writeStruct(EndEvent{
55	57	.pid = @intCast(pid),
56	58	.tid = @intCast(tid),
57	59	.time = @floatFromInt(std.time.microTimestamp()),

zigmod.yml+5

...	...	@@ -6,3 +6,8 @@ description: Generic tracing library for Zig, supports multiple backends.
6	6	dependencies:
7	7	- src: git https://github.com/nektro/zig-extras
8	8	- src: git https://github.com/nektro/zig-sys-linux
	9	- src: git https://github.com/nektro/zig-nfs
	10	- src: git https://github.com/nektro/zig-nio
	11
	12	root_dependencies:
	13	- src: git https://github.com/nektro/zig-nfs