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macho: handle dead stripping of atoms

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This commit is contained in:
Jakub Konka 2024-01-11 19:09:41 +01:00
parent 21e3bb38af
commit b0327ff233
2 changed files with 7 additions and 3 deletions
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4
src/link/MachO.zig
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@ -501,6 +501,10 @@ pub fn flushModule(self: *MachO, arena: Allocator, prog_node: *std.Progress.Node
try self.createObjcSections();
try self.claimUnresolved();
if (self.base.gc_sections) {
try dead_strip.gcAtoms(self);
}
state_log.debug("{}", .{self.dumpState()});
@panic("TODO");

6
src/link/MachO/dead_strip.zig
View File

@ -1,10 +1,10 @@
pub fn gcAtoms(macho_file: *MachO) !void {
const gpa = macho_file.base.allocator;
const gpa = macho_file.base.comp.gpa;
var objects = try std.ArrayList(File.Index).initCapacity(gpa, macho_file.objects.items.len + 1);
defer objects.deinit();
for (macho_file.objects.items) |index| objects.appendAssumeCapacity(index);
if (macho_file.internal_object_index) |index| objects.appendAssumeCapacity(index);
if (macho_file.internal_object) |index| objects.appendAssumeCapacity(index);
var roots = std.ArrayList(*Atom).init(gpa);
defer roots.deinit();
@ -21,7 +21,7 @@ fn collectRoots(roots: *std.ArrayList(*Atom), objects: []const File.Index, macho
const sym = macho_file.getSymbol(sym_index);
const file = sym.getFile(macho_file) orelse continue;
if (file.getIndex() != index) continue;
if (sym.flags.no_dead_strip or (macho_file.options.dylib and sym.visibility == .global))
if (sym.flags.no_dead_strip or (macho_file.base.isDynLib() and sym.visibility == .global))
try markSymbol(sym, roots, macho_file);
}