path: root/tools/CIndex/CIndex.cpp

//===- CIndex.cpp - Clang-C Source Indexing Library -----------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the main API hooks in the Clang-C Source Indexing
// library.
//
//===----------------------------------------------------------------------===//

#include "CIndexer.h"
#include "CXCursor.h"

#include "clang/AST/DeclVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Lex/Lexer.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Program.h"

// Needed to define L_TMPNAM on some systems.
#include <cstdio>

using namespace clang;
using namespace clang::cxcursor;
using namespace idx;

//===----------------------------------------------------------------------===//
// Crash Reporting.
//===----------------------------------------------------------------------===//

#ifdef __APPLE__
#ifndef NDEBUG
#define USE_CRASHTRACER
#include "clang/Analysis/Support/SaveAndRestore.h"
// Integrate with crash reporter.
extern "C" const char *__crashreporter_info__;
#define NUM_CRASH_STRINGS 16
static unsigned crashtracer_counter = 0;
static unsigned crashtracer_counter_id[NUM_CRASH_STRINGS] = { 0 };
static const char *crashtracer_strings[NUM_CRASH_STRINGS] = { 0 };
static const char *agg_crashtracer_strings[NUM_CRASH_STRINGS] = { 0 };

static unsigned SetCrashTracerInfo(const char *str,
                                   llvm::SmallString<1024> &AggStr) {
  
  unsigned slot = 0;
  while (crashtracer_strings[slot]) {
    if (++slot == NUM_CRASH_STRINGS)
      slot = 0;
  }
  crashtracer_strings[slot] = str;
  crashtracer_counter_id[slot] = ++crashtracer_counter;

  // We need to create an aggregate string because multiple threads
  // may be in this method at one time.  The crash reporter string
  // will attempt to overapproximate the set of in-flight invocations
  // of this function.  Race conditions can still cause this goal
  // to not be achieved.
  {
    llvm::raw_svector_ostream Out(AggStr);      
    for (unsigned i = 0; i < NUM_CRASH_STRINGS; ++i)
      if (crashtracer_strings[i]) Out << crashtracer_strings[i] << '\n';
  }
  __crashreporter_info__ = agg_crashtracer_strings[slot] =  AggStr.c_str();
  return slot;
}

static void ResetCrashTracerInfo(unsigned slot) {
  unsigned max_slot = 0;
  unsigned max_value = 0;
  
  crashtracer_strings[slot]