tiny.tldr.formats.elf.group

1pub const Index = struct {2    objects: []Memberships = &.{},34    pub fn init(allocator: Allocator, objects: []const ObjectFile) model.Error!Index {5        const object_memberships = try allocator.alloc(Memberships, objects.len);6        var initialized_count: usize = 0;7        errdefer {8            for (object_memberships[0..initialized_count]) |*memberships| memberships.deinit(allocator);9            allocator.free(object_memberships);10        }1112        for (objects, 0..) |object, object_index| {13            object_memberships[object_index] = try Memberships.init(allocator, object);14            initialized_count += 1;15        }1617        return .{ .objects = object_memberships };18    }1920    pub fn deinit(self: *Index, allocator: Allocator) void {21        for (self.objects) |*memberships| memberships.deinit(allocator);22        if (self.objects.len != 0) allocator.free(self.objects);23    }2425    pub fn groupsForSection(self: Index, section_ref: SectionRef) []const usize {26        if (section_ref.object_index >= self.objects.len) return &.{};27        return self.objects[section_ref.object_index].groupsForSection(section_ref.section_index);28    }29};

1pub fn duplicates(2    allocator: Allocator,3    objects: []ObjectFile,4) model.Error!void {5    var retained: std.StringHashMapUnmanaged(SymbolRef) = .{};6    defer retained.deinit(allocator);78    for (objects, 0..) |*object, object_index| {9        if (!object.has_group_sections) continue;10        for (object.sections) |section| {11            if (section.section_type != std.elf.SHT_GROUP) continue;12            if (section.info >= object.symbols.len) return error.InvalidObject;1314            const group_bytes = try record.bytes(object.*, section);15            if (group_bytes.len == 0) return error.InvalidObject;16            if ((record.word(group_bytes, 0) & std.elf.GRP_COMDAT) == 0) continue;1718            const signature = object.symbols[section.info];19            const name = try signatureName(object.*, signature);20            const gop = try retained.getOrPut(allocator, name);21            if (gop.found_existing) {22                try discardMembers(allocator, object, group_bytes);23            } else {24                gop.value_ptr.* = .{25                    .object_index = object_index,26                    .symbol_index = section.info,27                };28            }29        }30    }31}

1const discard = @import("discard.zig");2const membership = @import("membership.zig");3pub const record = @import("record.zig");45pub const Index = membership.Index;6pub const bytes = record.bytes;7pub const discardDuplicates = discard.duplicates;8pub const members = record.members;9pub const word = record.word;

1pub const group = @import("group/root.zig");