From 943d1fdffe805f6e026529a30167acdc324fb667 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 4 Mar 2014 21:48:49 +0000
Subject: [PATCH] Add support for arbitrary functors to CrashRecoveryContext.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202895 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/CrashRecoveryContext.h |  4 ++++
 lib/Support/CrashRecoveryContext.cpp        | 21 +++++++++++++++------
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/include/llvm/Support/CrashRecoveryContext.h b/include/llvm/Support/CrashRecoveryContext.h
index 4c0a5e26f00..aa5e55eeab4 100644
--- a/include/llvm/Support/CrashRecoveryContext.h
+++ b/include/llvm/Support/CrashRecoveryContext.h
@@ -10,6 +10,7 @@
 #ifndef LLVM_SUPPORT_CRASHRECOVERYCONTEXT_H
 #define LLVM_SUPPORT_CRASHRECOVERYCONTEXT_H
 
+#include <functional>
 #include <string>
 
 namespace llvm {
@@ -75,6 +76,7 @@ public:
   /// make as little assumptions as possible about the program state when
   /// RunSafely has returned false. Clients can use getBacktrace() to retrieve
   /// the backtrace of the crash on failures.
+  bool RunSafely(std::function<void()> Fn);
   bool RunSafely(void (*Fn)(void*), void *UserData);
 
   /// \brief Execute the provide callback function (with the given arguments) in
@@ -84,6 +86,8 @@ public:
   /// See RunSafely() and llvm_execute_on_thread().
   bool RunSafelyOnThread(void (*Fn)(void*), void *UserData,
                          unsigned RequestedStackSize = 0);
+  bool RunSafelyOnThread(std::function<void()> Fn,
+                         unsigned RequestedStackSize = 0);
 
   /// \brief Explicitly trigger a crash recovery in the current process, and
   /// return failure from RunSafely(). This function does not return.
diff --git a/lib/Support/CrashRecoveryContext.cpp b/lib/Support/CrashRecoveryContext.cpp
index 29f73fc539c..614980f718a 100644
--- a/lib/Support/CrashRecoveryContext.cpp
+++ b/lib/Support/CrashRecoveryContext.cpp
@@ -302,6 +302,10 @@ void CrashRecoveryContext::Disable() {
 #endif
 
 bool CrashRecoveryContext::RunSafely(void (*Fn)(void*), void *UserData) {
+  return RunSafely([&]() { Fn(UserData); });
+}
+
+bool CrashRecoveryContext::RunSafely(std::function<void()> Fn) {
   // If crash recovery is disabled, do nothing.
   if (gCrashRecoveryEnabled) {
     assert(!Impl && "Crash recovery context already initialized!");
@@ -313,7 +317,7 @@ bool CrashRecoveryContext::RunSafely(void (*Fn)(void*), void *UserData) {
     }
   }
 
-  Fn(UserData);
+  Fn();
   return true;
 }
 
@@ -332,10 +336,14 @@ const std::string &CrashRecoveryContext::getBacktrace() const {
 
 //
 
+bool CrashRecoveryContext::RunSafelyOnThread(void (*Fn)(void*), void *UserData,
+                                             unsigned RequestedStackSize) {
+  return RunSafelyOnThread([&]() { Fn(UserData); }, RequestedStackSize);
+}
+
 namespace {
 struct RunSafelyOnThreadInfo {
-  void (*UserFn)(void*);
-  void *UserData;
+  std::function<void()> Fn;
   CrashRecoveryContext *CRC;
   bool Result;
 };
@@ -344,11 +352,12 @@ struct RunSafelyOnThreadInfo {
 static void RunSafelyOnThread_Dispatch(void *UserData) {
   RunSafelyOnThreadInfo *Info =
     reinterpret_cast<RunSafelyOnThreadInfo*>(UserData);
-  Info->Result = Info->CRC->RunSafely(Info->UserFn, Info->UserData);
+  Info->Result = Info->CRC->RunSafely(Info->Fn);
 }
-bool CrashRecoveryContext::RunSafelyOnThread(void (*Fn)(void*), void *UserData,
+
+bool CrashRecoveryContext::RunSafelyOnThread(std::function<void()> Fn,
                                              unsigned RequestedStackSize) {
-  RunSafelyOnThreadInfo Info = { Fn, UserData, this, false };
+  RunSafelyOnThreadInfo Info = { Fn, this, false };
   llvm_execute_on_thread(RunSafelyOnThread_Dispatch, &Info, RequestedStackSize);
   if (CrashRecoveryContextImpl *CRC = (CrashRecoveryContextImpl *)Impl)
     CRC->setSwitchedThread();
-- 
2.11.0