Source
pub fn parseDbiStream(self: *Pdb) !void {
var stream = self.getStream(pdb.StreamType.dbi) orelse
return error.InvalidDebugInfo;
const gpa = self.allocator;
const reader = &stream.interface;
const header = try reader.takeStruct(std.pdb.DbiStreamHeader, .little);
if (header.version_header != 19990903) // V70, only value observed by LLVM team
return error.UnknownPDBVersion;
// if (header.Age != age)
// return error.UnmatchingPDB;
const mod_info_size = header.mod_info_size;
const section_contrib_size = header.section_contribution_size;
var modules = std.array_list.Managed(Module).init(gpa);
errdefer modules.deinit();
// Module Info Substream
var mod_info_offset: usize = 0;
while (mod_info_offset != mod_info_size) {
const mod_info = try reader.takeStruct(pdb.ModInfo, .little);
var this_record_len: usize = @sizeOf(pdb.ModInfo);
var module_name: std.Io.Writer.Allocating = .init(gpa);
defer module_name.deinit();
this_record_len += try reader.streamDelimiterLimit(&module_name.writer, 0, .limited(1024));
assert(reader.buffered()[0] == 0); // TODO change streamDelimiterLimit API
reader.toss(1);
this_record_len += 1;
var obj_file_name: std.Io.Writer.Allocating = .init(gpa);
defer obj_file_name.deinit();
this_record_len += try reader.streamDelimiterLimit(&obj_file_name.writer, 0, .limited(1024));
assert(reader.buffered()[0] == 0); // TODO change streamDelimiterLimit API
reader.toss(1);
this_record_len += 1;
if (this_record_len % 4 != 0) {
const round_to_next_4 = (this_record_len | 0x3) + 1;
const march_forward_bytes = round_to_next_4 - this_record_len;
try stream.seekBy(@as(isize, @intCast(march_forward_bytes)));
this_record_len += march_forward_bytes;
}
try modules.append(.{
.mod_info = mod_info,
.module_name = try module_name.toOwnedSlice(),
.obj_file_name = try obj_file_name.toOwnedSlice(),
.populated = false,
.symbols = undefined,
.subsect_info = undefined,
.checksum_offset = null,
});
mod_info_offset += this_record_len;
if (mod_info_offset > mod_info_size)
return error.InvalidDebugInfo;
}
// Section Contribution Substream
var sect_contribs = std.array_list.Managed(pdb.SectionContribEntry).init(gpa);
errdefer sect_contribs.deinit();
var sect_cont_offset: usize = 0;
if (section_contrib_size != 0) {
const version = reader.takeEnum(std.pdb.SectionContrSubstreamVersion, .little) catch |err| switch (err) {
error.InvalidEnumTag, error.EndOfStream => return error.InvalidDebugInfo,
error.ReadFailed => return error.ReadFailed,
};
_ = version;
sect_cont_offset += @sizeOf(u32);
}
while (sect_cont_offset != section_contrib_size) {
const entry = try sect_contribs.addOne();
entry.* = try reader.takeStruct(pdb.SectionContribEntry, .little);
sect_cont_offset += @sizeOf(pdb.SectionContribEntry);
if (sect_cont_offset > section_contrib_size)
return error.InvalidDebugInfo;
}
self.modules = try modules.toOwnedSlice();
self.sect_contribs = try sect_contribs.toOwnedSlice();
}