Index: src/IceGlobalContext.cpp |
diff --git a/src/IceGlobalContext.cpp b/src/IceGlobalContext.cpp |
index 7a21b401f36f2c5098bddecd0aa102504842a248..d77a5ddb554c4e1f3ec68232da712a6cc72152d3 100644 |
--- a/src/IceGlobalContext.cpp |
+++ b/src/IceGlobalContext.cpp |
@@ -12,6 +12,8 @@ |
// |
//===----------------------------------------------------------------------===// |
+#include <ctype.h> // isdigit() |
+ |
#include "IceDefs.h" |
#include "IceTypes.h" |
#include "IceCfg.h" |
@@ -129,8 +131,14 @@ IceString GlobalContext::mangleName(const IceString &Name) const { |
return NewName; |
} |
- ItemsParsed = sscanf(Name.c_str(), "_Z%u%s", &BaseLength, NameBase); |
- if (ItemsParsed == 2 && BaseLength <= strlen(NameBase)) { |
+ // Artificially limit BaseLength to 9 digits (less than 1 billion) |
+ // because sscanf behavior is undefined on integer overflow. If |
+ // there are more than 9 digits (which we test by looking at the |
+ // beginning of NameBase), then we consider this a failure to parse |
+ // a namespace mangling, and fall back to the simple prefixing. |
+ ItemsParsed = sscanf(Name.c_str(), "_Z%9u%s", &BaseLength, NameBase); |
+ if (ItemsParsed == 2 && BaseLength <= strlen(NameBase) && |
+ !isdigit(NameBase[0])) { |
// Transform _Z3barxyz ==> _ZN6Prefix3barExyz |
// ^^^^^^^^ ^ |
// (splice in "N6Prefix", and insert "E" after "3bar") |