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[LLVM][Demangle] Fix MS Demangler to be stricter about wide string literals #134483

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Merged
merged 2 commits into from
Apr 7, 2025
Merged

[LLVM][Demangle] Fix MS Demangler to be stricter about wide string literals #134483

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6bb3cd5
[LLVM][Demangle] Fix MS Demangler to be stricter about wide string li…
shafik Apr 5, 2025
76acfd6
Fixing spelling error and link to issue.
shafik Apr 7, 2025
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2 changes: 2 additions & 0 deletions llvm/docs/ReleaseNotes.md
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Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,8 @@ Changes to LLVM infrastructure

* Removed support for target intrinsics being defined in the target directories
themselves (i.e., the `TargetIntrinsicInfo` class).
* Fix Microsoft demangling of string literals to be stricter
(#GH129970))

Changes to building LLVM
------------------------
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5 changes: 5 additions & 0 deletions llvm/lib/Demangle/MicrosoftDemangle.cpp
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Expand Up @@ -1374,6 +1374,11 @@ Demangler::demangleStringLiteral(std::string_view &MangledName) {
Result->IsTruncated = true;

while (!consumeFront(MangledName, '@')) {
// For a wide string StringByteSize has to have an even length.
if (StringByteSize % 2 != 0)
goto StringLiteralError;
if (StringByteSize == 0)
goto StringLiteralError;
if (MangledName.size() < 2)
goto StringLiteralError;
wchar_t W = demangleWcharLiteral(MangledName);
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24 changes: 24 additions & 0 deletions llvm/test/Demangle/invalid-manglings.test
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Expand Up @@ -379,3 +379,27 @@
; CHECK-EMPTY:
; CHECK-NEXT: .?AUBase@@@8
; CHECK-NEXT: error: Invalid mangled name

; Begin GH129970

??_C@_12EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-EMPTY:
; CHECK-NEXT: ??_C@_12EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-NEXT: error: Invalid mangled name

??_C@_16EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-EMPTY:
; CHECK-NEXT: ??_C@_16EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-NEXT: error: Invalid mangled name

??_C@_18EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-EMPTY:
; CHECK-NEXT: ??_C@_18EEHFKJGG@?$AAt?$AAe?$AAx@
; CHECK-NEXT: error: Invalid mangled name

??_C@_15EEHFKJGG@?$AAt?$AAe?$AAx?$AAx@
; CHECK-EMPTY:
; CHECK-NEXT: ??_C@_15EEHFKJGG@?$AAt?$AAe?$AAx?$AAx@
; CHECK-NEXT: error: Invalid mangled name

; End GH129970