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https://github.com/ziglang/zig.git
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macho: remove dead code
This commit is contained in:
Jakub Konka
parent
3b2b9fcbc5
commit
e6891b2422
@ -3794,261 +3794,6 @@ pub fn findFirst(comptime T: type, haystack: []align(1) const T, start: usize, p
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return i;
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}
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// fn snapshotState(self: *MachO) !void {
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// const emit = self.base.options.emit orelse {
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// log.debug("no emit directory found; skipping snapshot...", .{});
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// return;
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// };
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// const Snapshot = struct {
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// const Node = struct {
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// const Tag = enum {
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// section_start,
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// section_end,
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// atom_start,
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// atom_end,
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// relocation,
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// pub fn jsonStringify(
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// tag: Tag,
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// options: std.json.StringifyOptions,
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// out_stream: anytype,
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// ) !void {
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// _ = options;
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// switch (tag) {
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// .section_start => try out_stream.writeAll("\"section_start\""),
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// .section_end => try out_stream.writeAll("\"section_end\""),
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// .atom_start => try out_stream.writeAll("\"atom_start\""),
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// .atom_end => try out_stream.writeAll("\"atom_end\""),
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// .relocation => try out_stream.writeAll("\"relocation\""),
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// }
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// }
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// };
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// const Payload = struct {
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// name: []const u8 = "",
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// aliases: [][]const u8 = &[0][]const u8{},
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// is_global: bool = false,
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// target: u64 = 0,
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// };
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// address: u64,
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// tag: Tag,
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// payload: Payload,
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// };
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// timestamp: i128,
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// nodes: []Node,
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// };
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// var arena_allocator = std.heap.ArenaAllocator.init(self.base.allocator);
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// defer arena_allocator.deinit();
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// const arena = arena_allocator.allocator();
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// const out_file = try emit.directory.handle.createFile("snapshots.json", .{
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// .truncate = false,
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// .read = true,
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// });
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// defer out_file.close();
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// if (out_file.seekFromEnd(-1)) {
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// try out_file.writer().writeByte(',');
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// } else |err| switch (err) {
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// error.Unseekable => try out_file.writer().writeByte('['),
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// else => |e| return e,
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// }
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// const writer = out_file.writer();
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// var snapshot = Snapshot{
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// .timestamp = std.time.nanoTimestamp(),
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// .nodes = undefined,
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// };
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// var nodes = std.ArrayList(Snapshot.Node).init(arena);
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// for (self.section_ordinals.keys()) |key| {
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// const sect = self.getSection(key);
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// const sect_name = try std.fmt.allocPrint(arena, "{s},{s}", .{ sect.segName(), sect.sectName() });
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// try nodes.append(.{
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// .address = sect.addr,
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// .tag = .section_start,
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// .payload = .{ .name = sect_name },
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// });
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// const is_tlv = sect.type_() == macho.S_THREAD_LOCAL_VARIABLES;
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// var atom: *Atom = self.atoms.get(key) orelse {
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// try nodes.append(.{
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// .address = sect.addr + sect.size,
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// .tag = .section_end,
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// .payload = .{},
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// });
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// continue;
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// };
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// while (atom.prev) |prev| {
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// atom = prev;
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// }
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// while (true) {
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// const atom_sym = atom.getSymbol(self);
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// var node = Snapshot.Node{
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// .address = atom_sym.n_value,
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// .tag = .atom_start,
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// .payload = .{
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// .name = atom.getName(self),
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// .is_global = self.globals.contains(atom.getName(self)),
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// },
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// };
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// var aliases = std.ArrayList([]const u8).init(arena);
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// for (atom.contained.items) |sym_off| {
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// if (sym_off.offset == 0) {
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// try aliases.append(self.getSymbolName(.{
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// .sym_index = sym_off.sym_index,
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// .file = atom.file,
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// }));
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// }
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// }
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// node.payload.aliases = aliases.toOwnedSlice();
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// try nodes.append(node);
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// var relocs = try std.ArrayList(Snapshot.Node).initCapacity(arena, atom.relocs.items.len);
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// for (atom.relocs.items) |rel| {
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// const source_addr = blk: {
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// const source_sym = atom.getSymbol(self);
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// break :blk source_sym.n_value + rel.offset;
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// };
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// const target_addr = blk: {
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// const target_atom = rel.getTargetAtom(self) orelse {
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// // If there is no atom for target, we still need to check for special, atom-less
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// // symbols such as `___dso_handle`.
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// const target_name = self.getSymbolName(rel.target);
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// if (self.globals.contains(target_name)) {
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// const atomless_sym = self.getSymbol(rel.target);
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// break :blk atomless_sym.n_value;
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// }
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// break :blk 0;
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// };
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// const target_sym = if (target_atom.isSymbolContained(rel.target, self))
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// self.getSymbol(rel.target)
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// else
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// target_atom.getSymbol(self);
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// const base_address: u64 = if (is_tlv) base_address: {
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// const sect_id: u16 = sect_id: {
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// if (self.tlv_data_section_index) |i| {
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// break :sect_id i;
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// } else if (self.tlv_bss_section_index) |i| {
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// break :sect_id i;
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// } else unreachable;
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// };
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// break :base_address self.getSection(.{
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// .seg = self.data_segment_cmd_index.?,
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// .sect = sect_id,
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// }).addr;
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// } else 0;
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// break :blk target_sym.n_value - base_address;
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// };
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// relocs.appendAssumeCapacity(.{
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// .address = source_addr,
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// .tag = .relocation,
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// .payload = .{ .target = target_addr },
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// });
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// }
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// if (atom.contained.items.len == 0) {
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// try nodes.appendSlice(relocs.items);
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// } else {
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// // Need to reverse iteration order of relocs since by default for relocatable sources
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// // they come in reverse. For linking, this doesn't matter in any way, however, for
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// // arranging the memoryline for displaying it does.
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// std.mem.reverse(Snapshot.Node, relocs.items);
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// var next_i: usize = 0;
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// var last_rel: usize = 0;
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// while (next_i < atom.contained.items.len) : (next_i += 1) {
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// const loc = SymbolWithLoc{
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// .sym_index = atom.contained.items[next_i].sym_index,
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// .file = atom.file,
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// };
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// const cont_sym = self.getSymbol(loc);
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// const cont_sym_name = self.getSymbolName(loc);
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// var contained_node = Snapshot.Node{
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// .address = cont_sym.n_value,
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// .tag = .atom_start,
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// .payload = .{
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// .name = cont_sym_name,
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// .is_global = self.globals.contains(cont_sym_name),
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// },
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// };
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// // Accumulate aliases
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// var inner_aliases = std.ArrayList([]const u8).init(arena);
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// while (true) {
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// if (next_i + 1 >= atom.contained.items.len) break;
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// const next_sym_loc = SymbolWithLoc{
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// .sym_index = atom.contained.items[next_i + 1].sym_index,
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// .file = atom.file,
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// };
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// const next_sym = self.getSymbol(next_sym_loc);
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// if (next_sym.n_value != cont_sym.n_value) break;
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// const next_sym_name = self.getSymbolName(next_sym_loc);
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// if (self.globals.contains(next_sym_name)) {
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// try inner_aliases.append(contained_node.payload.name);
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// contained_node.payload.name = next_sym_name;
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// contained_node.payload.is_global = true;
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// } else try inner_aliases.append(next_sym_name);
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// next_i += 1;
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// }
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// const cont_size = if (next_i + 1 < atom.contained.items.len)
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// self.getSymbol(.{
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// .sym_index = atom.contained.items[next_i + 1].sym_index,
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// .file = atom.file,
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// }).n_value - cont_sym.n_value
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// else
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// atom_sym.n_value + atom.size - cont_sym.n_value;
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// contained_node.payload.aliases = inner_aliases.toOwnedSlice();
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// try nodes.append(contained_node);
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// for (relocs.items[last_rel..]) |rel| {
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// if (rel.address >= cont_sym.n_value + cont_size) {
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// break;
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// }
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// try nodes.append(rel);
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// last_rel += 1;
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// }
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// try nodes.append(.{
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// .address = cont_sym.n_value + cont_size,
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// .tag = .atom_end,
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// .payload = .{},
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// });
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// }
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// }
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// try nodes.append(.{
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// .address = atom_sym.n_value + atom.size,
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// .tag = .atom_end,
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// .payload = .{},
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// });
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// if (atom.next) |next| {
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// atom = next;
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// } else break;
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// }
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// try nodes.append(.{
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// .address = sect.addr + sect.size,
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// .tag = .section_end,
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// .payload = .{},
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// });
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// }
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// snapshot.nodes = nodes.toOwnedSlice();
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// try std.json.stringify(snapshot, .{}, writer);
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// try writer.writeByte(']');
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// }
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pub fn logSections(self: *MachO) void {
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log.debug("sections:", .{});
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for (self.sections.items(.header), 0..) |header, i| {
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