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[pdb] Provide a better error message when overflowing the public/global symbol record stream #140884

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Merged
merged 4 commits into from
May 22, 2025
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[pdb] Provide a better error message when overflowing the public/global symbol record stream #140884

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37914e7
[pdb] Provide a better error message when overflowing the public/glob…
zmodem May 21, 2025
a16712c
format
zmodem May 21, 2025
e639bc4
mention the max total
zmodem May 21, 2025
66aa97b
use UINT32_MAX, fix syntax
zmodem May 21, 2025
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12 changes: 10 additions & 2 deletions llvm/lib/DebugInfo/PDB/Native/GSIStreamBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@
#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
#include "llvm/Support/BinaryItemStream.h"
#include "llvm/Support/BinaryStreamWriter.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Parallel.h"
#include "llvm/Support/TimeProfiler.h"
#include "llvm/Support/xxhash.h"
Expand All @@ -39,7 +40,7 @@ using namespace llvm::codeview;
// Helper class for building the public and global PDB hash table buckets.
struct llvm::pdb::GSIHashStreamBuilder {
// Sum of the size of all public or global records.
uint32_t RecordByteSize = 0;
uint64_t RecordByteSize = 0;

std::vector<PSHashRecord> HashRecords;

Expand Down Expand Up @@ -319,7 +320,14 @@ Error GSIStreamBuilder::finalizeMsfLayout() {
return Idx.takeError();
PublicsStreamIndex = *Idx;

uint32_t RecordBytes = PSH->RecordByteSize + GSH->RecordByteSize;
uint64_t RecordBytes = PSH->RecordByteSize + GSH->RecordByteSize;
if (RecordBytes > UINT32_MAX)
return make_error<StringError>(
formatv("the public ({0} bytes) and global ({1} bytes) "
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@aganea aganea May 21, 2025

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Can we also display what the maximum size is? It’s obvious for us, but not for regular users.

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@zmodem zmodem May 21, 2025

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Done.

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@rnk rnk May 21, 2025

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Github shows some kind of syntax error, maybe you have local fixup changes that didn't get pushed.

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@zmodem zmodem May 21, 2025

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Oops. Done.

"symbols are too large to fit in a PDB file; ",
"the maximum total is 4294967295 bytes.
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@rnk rnk May 21, 2025

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nit: maybe pass UINT32_MAX as a parameter to the formatter so we don't have to hardcode the decimal value.

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@zmodem zmodem May 21, 2025

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Done.

PSH->RecordByteSize, GSH->RecordByteSize),
inconvertibleErrorCode());

Idx = Msf.addStream(RecordBytes);
if (!Idx)
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