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CrashRecovery: Add CrashRecoveryContext::GetCurrent(), so clients can find the active context from anywhere.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111308 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-08-17 22:32:37 +00:00
parent c0c815e887
commit a8fa798246
2 changed files with 16 additions and 2 deletions
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4
include/llvm/Support/CrashRecoveryContext.h
View File

@ -53,6 +53,10 @@ public:
/// \brief Disable crash recovery.
static void Disable();
/// \brief Return the active context, if the code is currently executing in a
/// thread which is in a protected context.
static CrashRecoveryContext *GetCurrent();
/// \brief Execute the provide callback function (with the given arguments) in
/// a protected context.
///

14
lib/Support/CrashRecoveryContext.cpp
View File

@ -23,12 +23,14 @@ struct CrashRecoveryContextImpl;
static sys::ThreadLocal<const CrashRecoveryContextImpl> CurrentContext;
struct CrashRecoveryContextImpl {
CrashRecoveryContext *CRC;
std::string Backtrace;
::jmp_buf JumpBuffer;
volatile unsigned Failed : 1;
public:
CrashRecoveryContextImpl() : Failed(false) {
CrashRecoveryContextImpl(CrashRecoveryContext *CRC) : CRC(CRC),
Failed(false) {
CurrentContext.set(this);
}
~CrashRecoveryContextImpl() {
@ -56,6 +58,14 @@ CrashRecoveryContext::~CrashRecoveryContext() {
delete CRCI;
}
CrashRecoveryContext *CrashRecoveryContext::GetCurrent() {
const CrashRecoveryContextImpl *CRCI = CurrentContext.get();
if (!CRCI)
return 0;
return CRCI->CRC;
}
#ifdef LLVM_ON_WIN32
// FIXME: No real Win32 implementation currently.
@ -164,7 +174,7 @@ bool CrashRecoveryContext::RunSafely(void (*Fn)(void*), void *UserData) {
// If crash recovery is disabled, do nothing.
if (gCrashRecoveryEnabled) {
assert(!Impl && "Crash recovery context already initialized!");
CrashRecoveryContextImpl *CRCI = new CrashRecoveryContextImpl;
CrashRecoveryContextImpl *CRCI = new CrashRecoveryContextImpl(this);
Impl = CRCI;
if (setjmp(CRCI->JumpBuffer) != 0) {