Source
pub fn getPdbPath(self: *Coff) !?[]const u8 {
assert(self.is_image);
const data_dirs = self.getDataDirectories();
if (@intFromEnum(DirectoryEntry.DEBUG) >= data_dirs.len) return null;
const debug_dir = data_dirs[@intFromEnum(DirectoryEntry.DEBUG)];
var reader: std.Io.Reader = .fixed(self.data);
if (self.is_loaded) {
reader.seek = debug_dir.virtual_address;
} else {
// Find what section the debug_dir is in, in order to convert the RVA to a file offset
for (self.getSectionHeaders()) |*sect| {
if (debug_dir.virtual_address >= sect.virtual_address and debug_dir.virtual_address < sect.virtual_address + sect.virtual_size) {
reader.seek = sect.pointer_to_raw_data + (debug_dir.virtual_address - sect.virtual_address);
break;
}
} else return error.InvalidDebugDirectory;
}
// Find the correct DebugDirectoryEntry, and where its data is stored.
// It can be in any section.
const debug_dir_entry_count = debug_dir.size / @sizeOf(DebugDirectoryEntry);
var i: u32 = 0;
while (i < debug_dir_entry_count) : (i += 1) {
const debug_dir_entry = try reader.takeStruct(DebugDirectoryEntry, .little);
if (debug_dir_entry.type == .CODEVIEW) {
const dir_offset = if (self.is_loaded) debug_dir_entry.address_of_raw_data else debug_dir_entry.pointer_to_raw_data;
reader.seek = dir_offset;
break;
}
} else return null;
const code_view_signature = try reader.takeArray(4);
// 'RSDS' indicates PDB70 format, used by lld.
if (!mem.eql(u8, code_view_signature, "RSDS"))
return error.InvalidPEMagic;
try reader.readSliceAll(self.guid[0..]);
self.age = try reader.takeInt(u32, .little);
// Finally read the null-terminated string.
const start = reader.seek;
const len = std.mem.indexOfScalar(u8, self.data[start..], 0) orelse return null;
return self.data[start .. start + len];
}