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authorAlp Toker <alp@nuanti.com>2014-06-26 00:00:48 +0000
committerAlp Toker <alp@nuanti.com>2014-06-26 00:00:48 +0000
commit255907042245b77779e3e38c5ce66901866cabe5 (patch)
tree92db65aa99c37ab5f68cd6adaae1d8cf6d629b8f /lib/LTO
parentce6e7c7a59e8595ea3f30d87cbad4af278cb5ef3 (diff)
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Introduce a string_ostream string builder facilty
string_ostream is a safe and efficient string builder that combines opaque stack storage with a built-in ostream interface. small_string_ostream<bytes> additionally permits an explicit stack storage size other than the default 128 bytes to be provided. Beyond that, storage is transferred to the heap. This convenient class can be used in most places an std::string+raw_string_ostream pair or SmallString<>+raw_svector_ostream pair would previously have been used, in order to guarantee consistent access without byte truncation. The patch also converts much of LLVM to use the new facility. These changes include several probable bug fixes for truncated output, a programming error that's no longer possible with the new interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211749 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/LTO')
-rw-r--r--lib/LTO/LTOCodeGenerator.cpp11
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/LTO/LTOCodeGenerator.cpp b/lib/LTO/LTOCodeGenerator.cpp
index a1709f60ff..d87299b5c7 100644
--- a/lib/LTO/LTOCodeGenerator.cpp
+++ b/lib/LTO/LTOCodeGenerator.cpp
@@ -549,16 +549,17 @@ void LTOCodeGenerator::DiagnosticHandler2(const DiagnosticInfo &DI) {
break;
}
// Create the string that will be reported to the external diagnostic handler.
- std::string MsgStorage;
- raw_string_ostream Stream(MsgStorage);
- DiagnosticPrinterRawOStream DP(Stream);
+ string_ostream Msg;
+ DiagnosticPrinterRawOStream DP(Msg);
DI.print(DP);
- Stream.flush();
+
+ // Null-terminate the C string.
+ Msg << '\0';
// If this method has been called it means someone has set up an external
// diagnostic handler. Assert on that.
assert(DiagHandler && "Invalid diagnostic handler");
- (*DiagHandler)(Severity, MsgStorage.c_str(), DiagContext);
+ (*DiagHandler)(Severity, Msg.str().data(), DiagContext);
}
void