Merge commit '84d6d69fc69662b2709fffbeaf3c3b4f53c535b1'

src/leveldb/.gitignore

@@ -6,6 +6,7 @@ build_config.mk
 *.so.*
 *_test
 db_bench
+leveldbutil
 Release
 Debug
 Benchmark

src/leveldb/Makefile

@@ -12,7 +12,7 @@ OPT ?= -O2 -DNDEBUG       # (A) Production use (optimized mode)
 #-----------------------------------------------
 
 # detect what platform we're building on
-$(shell CC=$(CC) CXX=$(CXX) TARGET_OS=$(TARGET_OS) \
+$(shell CC="$(CC)" CXX="$(CXX)" TARGET_OS="$(TARGET_OS)" \
     ./build_detect_platform build_config.mk ./)
 # this file is generated by the previous line to set build flags and sources
 include build_config.mk

src/leveldb/build_detect_platform

@@ -44,6 +44,10 @@ if test -z "$CXX"; then
     CXX=g++
 fi
 
+if test -z "$TMPDIR"; then
+    TMPDIR=/tmp
+fi
+
 # Detect OS
 if test -z "$TARGET_OS"; then
     TARGET_OS=`uname -s`
@@ -169,8 +173,10 @@ if [ "$CROSS_COMPILE" = "true" ]; then
     # Cross-compiling; do not try any compilation tests.
     true
 else
+    CXXOUTPUT="${TMPDIR}/leveldb_build_detect_platform-cxx.$$"
+
     # If -std=c++0x works, use <cstdatomic>.  Otherwise use port_posix.h.
-    $CXX $CXXFLAGS -std=c++0x -x c++ - -o /dev/null 2>/dev/null  <<EOF
+    $CXX $CXXFLAGS -std=c++0x -x c++ - -o $CXXOUTPUT 2>/dev/null  <<EOF
       #include <cstdatomic>
       int main() {}
 EOF
@@ -182,12 +188,14 @@ EOF
     fi
 
     # Test whether tcmalloc is available
-    $CXX $CXXFLAGS -x c++ - -o /dev/null -ltcmalloc 2>/dev/null  <<EOF
+    $CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null  <<EOF
       int main() {}
 EOF
     if [ "$?" = 0 ]; then
         PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
     fi
+
+    rm -f $CXXOUTPUT 2>/dev/null
 fi
 
 PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"

src/leveldb/db/db_impl.cc

@@ -822,9 +822,6 @@ Status DBImpl::FinishCompactionOutputFile(CompactionState* compact,
           (unsigned long long) output_number,
           (unsigned long long) current_entries,
           (unsigned long long) current_bytes);
-
-      // rate-limit compaction file creation with a 100ms pause
-      env_->SleepForMicroseconds(100000);
     }
   }
   return s;

src/leveldb/issues/issue178_test.cc

@@ -0,0 +1,92 @@
+// Copyright (c) 2013 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+// Test for issue 178: a manual compaction causes deleted data to reappear.
+#include <iostream>
+#include <sstream>
+#include <cstdlib>
+
+#include "leveldb/db.h"
+#include "leveldb/write_batch.h"
+#include "util/testharness.h"
+
+namespace {
+
+const int kNumKeys = 1100000;
+
+std::string Key1(int i) {
+  char buf[100];
+  snprintf(buf, sizeof(buf), "my_key_%d", i);
+  return buf;
+}
+
+std::string Key2(int i) {
+  return Key1(i) + "_xxx";
+}
+
+class Issue178 { };
+
+TEST(Issue178, Test) {
+  // Get rid of any state from an old run.
+  std::string dbpath = leveldb::test::TmpDir() + "/leveldb_cbug_test";
+  DestroyDB(dbpath, leveldb::Options());
+
+  // Open database.  Disable compression since it affects the creation
+  // of layers and the code below is trying to test against a very
+  // specific scenario.
+  leveldb::DB* db;
+  leveldb::Options db_options;
+  db_options.create_if_missing = true;
+  db_options.compression = leveldb::kNoCompression;
+  ASSERT_OK(leveldb::DB::Open(db_options, dbpath, &db));
+
+  // create first key range
+  leveldb::WriteBatch batch;
+  for (size_t i = 0; i < kNumKeys; i++) {
+    batch.Put(Key1(i), "value for range 1 key");
+  }
+  ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+  // create second key range
+  batch.Clear();
+  for (size_t i = 0; i < kNumKeys; i++) {
+    batch.Put(Key2(i), "value for range 2 key");
+  }
+  ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+  // delete second key range
+  batch.Clear();
+  for (size_t i = 0; i < kNumKeys; i++) {
+    batch.Delete(Key2(i));
+  }
+  ASSERT_OK(db->Write(leveldb::WriteOptions(), &batch));
+
+  // compact database
+  std::string start_key = Key1(0);
+  std::string end_key = Key1(kNumKeys - 1);
+  leveldb::Slice least(start_key.data(), start_key.size());
+  leveldb::Slice greatest(end_key.data(), end_key.size());
+
+  // commenting out the line below causes the example to work correctly
+  db->CompactRange(&least, &greatest);
+
+  // count the keys
+  leveldb::Iterator* iter = db->NewIterator(leveldb::ReadOptions());
+  size_t num_keys = 0;
+  for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
+    num_keys++;
+  }
+  delete iter;
+  ASSERT_EQ(kNumKeys, num_keys) << "Bad number of keys";
+
+  // close database
+  delete db;
+  DestroyDB(dbpath, leveldb::Options());
+}
+
+}  // anonymous namespace
+
+int main(int argc, char** argv) {
+  return leveldb::test::RunAllTests();
+}

src/leveldb/util/comparator.cc

@@ -66,7 +66,7 @@ class BytewiseComparatorImpl : public Comparator {
 };
 }  // namespace
 
-static port::OnceType once_comparator = LEVELDB_ONCE_INIT;
+static port::OnceType once = LEVELDB_ONCE_INIT;
 static const Comparator* bytewise;
 
 static void InitModule() {
@@ -74,7 +74,7 @@ static void InitModule() {
 }
 
 const Comparator* BytewiseComparator() {
-  port::InitOnce(&once_comparator, InitModule);
+  port::InitOnce(&once, InitModule);
   return bytewise;
 }