revive translateC support
This commit is contained in:
Techatrix
parent
b958b258a3
commit
b623f141ea
@ -988,7 +988,10 @@ pub fn collectIncludeDirs(
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const native_include_dirs = try native_paths.include_dirs.toOwnedSlice();
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defer allocator.free(native_include_dirs);
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include_dirs.appendSliceAssumeCapacity(native_include_dirs);
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for (native_include_dirs) |native_include_dir| {
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var array = std.ArrayListUnmanaged(u8).fromOwnedSliceSentinel(0, native_include_dir);
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include_dirs.appendAssumeCapacity(try array.toOwnedSlice(allocator));
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}
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for (build_file_includes_paths) |include_path| {
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const absolute_path = if (std.fs.path.isAbsolute(include_path))
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@ -1015,10 +1018,6 @@ pub fn resolveCImport(self: *DocumentStore, handle: Handle, node: Ast.Node.Index
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if (!std.process.can_spawn) return null;
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// FIXME: Re-enable cimport resolution once https://github.com/ziglang/zig/issues/15025 is resolved
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// Tracking issue: https://github.com/zigtools/zls/issues/1080
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if (true) return null;
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const index = std.mem.indexOfScalar(Ast.Node.Index, handle.cimports.items(.node), node) orelse return null;
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const hash: Hash = handle.cimports.items(.hash)[index];
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@ -1039,12 +1038,19 @@ pub fn resolveCImport(self: *DocumentStore, handle: Handle, node: Ast.Node.Index
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return null;
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};
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var result = (try translate_c.translate(
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const maybe_result = translate_c.translate(
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self.allocator,
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self.config.*,
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include_dirs.items,
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source,
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)) orelse return null;
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) catch |err| switch (err) {
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error.OutOfMemory => |e| return e,
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else => |e| {
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log.err("failed to translate cimport: {}", .{e});
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return null;
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},
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};
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var result = maybe_result orelse return null;
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self.cimports.putNoClobber(self.allocator, hash, result) catch result.deinit(self.allocator);
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168
src/ZigCompileServer.zig
Normal file
168
src/ZigCompileServer.zig
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@ -0,0 +1,168 @@
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//! modified version of https://github.com/ziglang/zig/blob/master/lib/std/zig/Server.zig
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//! I don't know why but this code seems to work
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//! zig binary serialization library in stdlib, when?
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in: std.fs.File,
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out: std.fs.File,
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pooler: std.io.Poller(StreamEnum),
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const StreamEnum = enum { in };
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pub const Options = struct {
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gpa: Allocator,
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in: std.fs.File,
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out: std.fs.File,
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};
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pub fn init(options: Options) Client {
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var s: Client = .{
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.in = options.in,
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.out = options.out,
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.pooler = std.io.poll(options.gpa, StreamEnum, .{ .in = options.in }),
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};
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return s;
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}
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pub fn deinit(s: *Client) void {
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s.pooler.deinit();
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s.* = undefined;
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}
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pub fn receiveMessage(client: *Client) !InMessage.Header {
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const Header = InMessage.Header;
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const fifo = client.pooler.fifo(.in);
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while (try client.pooler.poll()) {
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const buf = fifo.readableSlice(0);
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assert(fifo.readableLength() == buf.len);
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if (buf.len >= @sizeOf(Header)) {
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// workaround for https://github.com/ziglang/zig/issues/14904
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const bytes_len = bswap_and_workaround_u32(buf[4..][0..4]);
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const tag = bswap_and_workaround_tag(buf[0..][0..4]);
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if (buf.len - @sizeOf(Header) >= bytes_len) {
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fifo.discard(@sizeOf(Header));
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return .{
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.tag = tag,
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.bytes_len = bytes_len,
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};
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} else {
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const needed = bytes_len - (buf.len - @sizeOf(Header));
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const write_buffer = try fifo.writableWithSize(needed);
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const amt = try client.in.readAll(write_buffer);
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fifo.update(amt);
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continue;
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}
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}
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const write_buffer = try fifo.writableWithSize(256);
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const amt = try client.in.read(write_buffer);
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fifo.update(amt);
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}
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return error.Timeout;
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}
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pub fn receiveEmitBinPath(client: *Client) !InMessage.EmitBinPath {
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const reader = client.pooler.fifo(.in).reader();
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return reader.readStruct(InMessage.EmitBinPath);
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}
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pub fn receiveErrorBundle(client: *Client) !InMessage.ErrorBundle {
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const reader = client.pooler.fifo(.in).reader();
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return .{
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.extra_len = try reader.readIntLittle(u32),
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.string_bytes_len = try reader.readIntLittle(u32),
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};
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}
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pub fn receiveBytes(client: *Client, allocator: std.mem.Allocator, len: usize) ![]u8 {
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const reader = client.pooler.fifo(.in).reader();
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const result = try reader.readAllAlloc(allocator, len);
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if (result.len != len) return error.UnexpectedEOF;
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return result;
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}
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pub fn receiveIntArray(client: *Client, allocator: std.mem.Allocator, len: usize) ![]u32 {
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const reader = client.pooler.fifo(.in).reader();
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var array_list = std.ArrayListAligned(u8, 4).init(allocator);
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errdefer array_list.deinit();
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try reader.readAllArrayListAligned(4, &array_list, len);
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const bytes = try array_list.toOwnedSlice();
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const result = std.mem.bytesAsSlice(u32, bytes);
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if (need_bswap) {
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bswap_u32_array(result);
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}
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return result;
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}
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pub fn serveMessage(
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client: *const Client,
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header: OutMessage.Header,
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bufs: []const []const u8,
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) !void {
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var iovecs: [10]std.os.iovec_const = undefined;
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const header_le = bswap(header);
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iovecs[0] = .{
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.iov_base = @ptrCast([*]const u8, &header_le),
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.iov_len = @sizeOf(OutMessage.Header),
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};
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for (bufs, iovecs[1 .. bufs.len + 1]) |buf, *iovec| {
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iovec.* = .{
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.iov_base = buf.ptr,
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.iov_len = buf.len,
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};
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}
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try client.out.writevAll(iovecs[0 .. bufs.len + 1]);
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}
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fn bswap(x: anytype) @TypeOf(x) {
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if (!need_bswap) return x;
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const T = @TypeOf(x);
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switch (@typeInfo(T)) {
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.Enum => return @intToEnum(T, @byteSwap(@enumToInt(x))),
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.Int => return @byteSwap(x),
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.Struct => |info| switch (info.layout) {
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.Extern => {
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var result: T = undefined;
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inline for (info.fields) |field| {
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@field(result, field.name) = bswap(@field(x, field.name));
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}
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return result;
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},
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.Packed => {
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const I = info.backing_integer.?;
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return @bitCast(T, @byteSwap(@bitCast(I, x)));
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},
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.Auto => @compileError("auto layout struct"),
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},
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else => @compileError("bswap on type " ++ @typeName(T)),
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}
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}
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fn bswap_u32_array(slice: []u32) void {
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comptime assert(need_bswap);
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for (slice) |*elem| elem.* = @byteSwap(elem.*);
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}
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/// workaround for https://github.com/ziglang/zig/issues/14904
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fn bswap_and_workaround_u32(bytes_ptr: *const [4]u8) u32 {
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return std.mem.readIntLittle(u32, bytes_ptr);
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}
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/// workaround for https://github.com/ziglang/zig/issues/14904
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fn bswap_and_workaround_tag(bytes_ptr: *const [4]u8) InMessage.Tag {
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const int = std.mem.readIntLittle(u32, bytes_ptr);
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return @intToEnum(InMessage.Tag, int);
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}
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const OutMessage = std.zig.Client.Message;
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const InMessage = std.zig.Server.Message;
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const Client = @This();
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const builtin = @import("builtin");
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const std = @import("std");
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const Allocator = std.mem.Allocator;
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const assert = std.debug.assert;
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const native_endian = builtin.target.cpu.arch.endian();
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const need_bswap = native_endian != .Little;
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@ -6,6 +6,7 @@ const ast = @import("ast.zig");
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const tracy = @import("tracy.zig");
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const Ast = std.zig.Ast;
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const URI = @import("uri.zig");
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const ZCS = @import("ZigCompileServer.zig");
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const log = std.log.scoped(.zls_translate_c);
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/// converts a `@cInclude` node into an equivalent c header file
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@ -133,7 +134,12 @@ pub const Result = union(enum) {
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/// returns a URI to the generated zig file on success or the content of stderr on failure
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/// null indicates a failure which is automatically logged
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/// Caller owns returned memory.
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pub fn translate(allocator: std.mem.Allocator, config: Config, include_dirs: []const []const u8, source: []const u8) error{OutOfMemory}!?Result {
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pub fn translate(
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allocator: std.mem.Allocator,
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config: Config,
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include_dirs: []const []const u8,
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source: []const u8,
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) !?Result {
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const tracy_zone = tracy.trace(@src());
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defer tracy_zone.end();
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@ -157,12 +163,12 @@ pub fn translate(allocator: std.mem.Allocator, config: Config, include_dirs: []c
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const base_args = &[_][]const u8{
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config.zig_exe_path orelse return null,
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"translate-c",
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"--enable-cache",
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"--zig-lib-dir",
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config.zig_lib_path orelse return null,
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"--cache-dir",
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config.global_cache_path.?,
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"-lc",
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"--listen=-",
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};
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const argc = base_args.len + 2 * include_dirs.len + 1;
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@ -178,28 +184,86 @@ pub fn translate(allocator: std.mem.Allocator, config: Config, include_dirs: []c
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argv.appendAssumeCapacity(file_path);
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const result = std.ChildProcess.exec(.{
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.allocator = allocator,
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.argv = argv.items,
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}) catch |err| {
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log.err("Failed to execute zig translate-c process, error: {}", .{err});
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var process = std.ChildProcess.init(argv.items, allocator);
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process.stdin_behavior = .Pipe;
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process.stdout_behavior = .Pipe;
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process.stderr_behavior = .Pipe;
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errdefer |err| if (!zig_builtin.is_test) blk: {
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const joined = std.mem.join(allocator, " ", argv.items) catch break :blk;
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defer allocator.free(joined);
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if (process.stderr) |stderr| {
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const stderr_output = stderr.readToEndAlloc(allocator, std.math.maxInt(usize)) catch break :blk;
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defer allocator.free(stderr_output);
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log.err("failed zig translate-c command:\n{s}\nstderr:{s}\nerror:{}\n", .{ joined, stderr_output, err });
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} else {
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log.err("failed zig translate-c command:\n{s}\nerror:{}\n", .{ joined, err });
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}
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};
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process.spawn() catch |err| {
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log.err("failed to spawn zig translate-c process, error: {}", .{err});
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return null;
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};
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defer allocator.free(result.stdout);
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defer allocator.free(result.stderr);
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defer _ = process.wait() catch |wait_err| blk: {
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log.err("zig translate-c process did not terminate, error: {}", .{wait_err});
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break :blk process.kill() catch |kill_err| {
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std.debug.panic("failed to terminate zig translate-c process, error: {}", .{kill_err});
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};
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};
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return switch (result.term) {
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.Exited => |code| if (code == 0) {
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return Result{ .success = try URI.fromPath(allocator, std.mem.sliceTo(result.stdout, '\n')) };
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} else {
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return Result{ .failure = try allocator.dupe(u8, std.mem.sliceTo(result.stderr, '\n')) };
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var zcs = ZCS.init(.{
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.gpa = allocator,
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.in = process.stdout.?,
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.out = process.stdin.?,
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});
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defer zcs.deinit();
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try zcs.serveMessage(.{ .tag = .update, .bytes_len = 0 }, &.{});
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try zcs.serveMessage(.{ .tag = .exit, .bytes_len = 0 }, &.{});
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while (true) {
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const header = try zcs.receiveMessage();
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// log.debug("received header: {}", .{header});
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switch (header.tag) {
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.zig_version => {
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// log.debug("zig-version: {s}", .{zcs.receive_fifo.readableSliceOfLen(header.bytes_len)});
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zcs.pooler.fifo(.in).discard(header.bytes_len);
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},
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.emit_bin_path => {
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const body_size = @sizeOf(std.zig.Server.Message.EmitBinPath);
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if (header.bytes_len <= body_size) return error.InvalidResponse;
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const trailing_size = header.bytes_len - body_size;
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_ = try zcs.receiveEmitBinPath();
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const result_path = try zcs.receiveBytes(allocator, trailing_size);
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defer allocator.free(result_path);
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return Result{ .success = try URI.fromPath(allocator, std.mem.sliceTo(result_path, '\n')) };
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},
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.error_bundle => {
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const error_bundle_header = try zcs.receiveErrorBundle();
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const extra = try zcs.receiveIntArray(allocator, error_bundle_header.extra_len);
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defer allocator.free(extra);
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const string_bytes = try zcs.receiveBytes(allocator, error_bundle_header.string_bytes_len);
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defer allocator.free(string_bytes);
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const error_bundle = std.zig.ErrorBundle{ .string_bytes = string_bytes, .extra = extra };
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return Result{ .failure = try allocator.dupe(u8, error_bundle.getCompileLogOutput()) };
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},
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else => {
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log.err("zig translate-c process terminated '{}'", .{result.term});
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log.warn("received unexpected message {} from zig compile server", .{header.tag});
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return null;
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},
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};
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}
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}
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}
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fn extractString(str: []const u8) []const u8 {
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@ -8,6 +8,24 @@ const translate_c = zls.translate_c;
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const allocator: std.mem.Allocator = std.testing.allocator;
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test "zig compile server - translate c" {
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var result1 = try testTranslate(
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\\void foo(int);
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\\void bar(float*);
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);
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defer result1.deinit(allocator);
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try std.testing.expect(result1 == .success);
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// TODO the zig compiler doesn't seem to report error bundles for translate-c
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// Hopefully I can fix that once llvm-16 finished compiling :)
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var result2 = testTranslate(
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\\#include <this_file_doesnt_exist>
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);
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defer if (result2) |*r| r.deinit(allocator) else |_| {};
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try std.testing.expectError(error.Timeout, result2);
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}
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test "convertCInclude - empty" {
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try testConvertCInclude("@cImport()", "");
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try testConvertCInclude("@cImport({})", "");
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@ -29,7 +47,7 @@ test "convertCInclude - cInclude" {
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);
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}
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test "translate_c - cDefine" {
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test "convertCInclude - cDefine" {
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try testConvertCInclude(
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\\@cImport(@cDefine("FOO", "BAR"))
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,
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@ -42,7 +60,7 @@ test "translate_c - cDefine" {
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);
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}
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test "translate_c - cUndef" {
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test "convertCInclude - cUndef" {
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try testConvertCInclude(
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\\@cImport(@cUndef("FOO"))
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,
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@ -85,3 +103,33 @@ fn testConvertCInclude(cimport_source: []const u8, expected: []const u8) !void {
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try std.testing.expectEqualStrings(expected, trimmed_output);
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}
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fn testTranslate(c_source: []const u8) !translate_c.Result {
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if (!std.process.can_spawn) return error.SkipZigTest;
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var config: zls.Config = .{};
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defer std.json.parseFree(zls.Config, allocator, config);
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var runtime_zig_version: ?zls.ZigVersionWrapper = null;
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defer if (runtime_zig_version) |*v| v.free();
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try zls.configuration.configChanged(&config, &runtime_zig_version, allocator, null);
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if (config.global_cache_path == null or
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config.zig_exe_path == null or
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config.zig_lib_path == null) return error.SkipZigTest;
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const result = (try translate_c.translate(allocator, config, &.{}, c_source)).?;
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switch (result) {
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.success => |uri| {
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const path = try zls.URI.parse(allocator, uri);
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defer allocator.free(path);
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try std.testing.expect(std.fs.path.isAbsolute(path));
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},
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.failure => |message| {
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try std.testing.expect(message.len != 0);
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},
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}
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return result;
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}
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