#include "Driver.h"
#include "Error.h"
#include "Symbols.h"
+#include "llvm/Support/Endian.h"
#include "llvm/Support/FileOutputBuffer.h"
#include <memory>
using namespace llvm;
+using namespace llvm::support;
+using namespace llvm::support::endian;
const int PageSize = 4096;
const uint8_t Magic[32] = "Microsoft C/C++ MSF 7.00\r\n\032DS\0\0";
+namespace {
+struct PDBHeader {
+ uint8_t Magic[32];
+ ulittle32_t PageSize;
+ ulittle32_t FpmPage;
+ ulittle32_t PageCount;
+ ulittle32_t RootSize;
+ ulittle32_t Reserved;
+ ulittle32_t RootPointer;
+};
+}
+
void lld::coff::createPDB(StringRef Path) {
// Create a file.
size_t FileSize = PageSize * 3;
- ErrorOr<std::unique_ptr<FileOutputBuffer>> BufOrErr =
+ ErrorOr<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(Path, FileSize);
- error(BufOrErr, Twine("failed to open ") + Path);
- std::unique_ptr<FileOutputBuffer> Buf = std::move(*BufOrErr);
+ error(BufferOrErr, Twine("failed to open ") + Path);
+ std::unique_ptr<FileOutputBuffer> Buffer = std::move(*BufferOrErr);
+
+ // Write the file header.
+ uint8_t *Buf = Buffer->getBufferStart();
+ auto *Hdr = reinterpret_cast<PDBHeader *>(Buf);
+ memcpy(Hdr->Magic, Magic, sizeof(Magic));
+ Hdr->PageSize = PageSize;
+ // I don't know what FpmPage field means, but it must not be 0.
+ Hdr->FpmPage = 1;
+ Hdr->PageCount = FileSize / PageSize;
+ // Root directory is empty, containing only the length field.
+ Hdr->RootSize = 4;
+ // Root directory is on page 1.
+ Hdr->RootPointer = 1;
- // Write the file magic.
- uint8_t *P = Buf->getBufferStart();
- memcpy(P, Magic, sizeof(Magic));
+ // Write the root directory. Root stream is on page 2.
+ write32le(Buf + PageSize, 2);
+ Buffer->commit();
}