Alpine Linux Build (#990)

* Musl libc does not provide adaptive mutex. Added feature test for PTHREAD_MUTEX_ADAPTIVE_NP.

* Musl libc does not provide backtrace(3). Added a feature check for backtrace(3).

* Fixed compiler error.

* Musl libc does not implement backtrace(3). Added platform check for libexecinfo.

* Alpine does not appear to support gcc -pg option. By default (gcc has PIE option enabled) it fails with:

gcc: error: -pie and -pg|p|profile are incompatible when linking

When -fno-PIE and -nopie are used it fails with:

/usr/lib/gcc/x86_64-alpine-linux-musl/5.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find gcrt1.o: No such file or directory

Added gcc -pg platform test and output PROFILING_FLAGS accordingly. Replaced pg var in Makefile with PROFILING_FLAGS.

* fix segfault when TEST_IOCTL_FRIENDLY_TMPDIR is undefined and default candidates are not suitable

* use ASSERT_DOUBLE_EQ instead of ASSERT_EQ

* When compiled with ROCKSDB_MALLOC_USABLE_SIZE UniversalCompactionFourPaths and UniversalCompactionSecondPathRatio tests fail due to premature memtable flushes on systems with 16-byte alignment. Arena runs out of block space before GenerateNewFile() completes.

Increased options.write_buffer_size.

Makefile

@@ -171,9 +171,7 @@ ifdef COMPILE_WITH_TSAN
 	PLATFORM_CXXFLAGS += -fsanitize=thread -fPIC -DROCKSDB_TSAN_RUN
         # Turn off -pg when enabling TSAN testing, because that induces
         # a link failure.  TODO: find the root cause
-	pg =
-else
-	pg = -pg
+	PROFILING_FLAGS =
 endif
 
 # USAN doesn't work well with jemalloc. If we're compiling with USAN, we should use regular malloc.
@@ -918,7 +916,7 @@ db_table_properties_test: db/db_table_properties_test.o db/db_test_util.o $(LIBO
 	$(AM_LINK)
 
 log_write_bench: util/log_write_bench.o $(LIBOBJECTS) $(TESTHARNESS)
-	$(AM_LINK) $(pg)
+	$(AM_LINK) $(PROFILING_FLAGS)
 
 plain_table_db_test: db/plain_table_db_test.o $(LIBOBJECTS) $(TESTHARNESS)
 	$(AM_LINK)
@@ -927,7 +925,7 @@ comparator_db_test: db/comparator_db_test.o $(LIBOBJECTS) $(TESTHARNESS)
 	$(AM_LINK)
 
 table_reader_bench: table/table_reader_bench.o $(LIBOBJECTS) $(TESTHARNESS)
-	$(AM_LINK) $(pg)
+	$(AM_LINK) $(PROFILING_FLAGS)
 
 perf_context_test: db/perf_context_test.o $(LIBOBJECTS) $(TESTHARNESS)
 	$(AM_V_CCLD)$(CXX) $^ $(EXEC_LDFLAGS) -o $@ $(LDFLAGS)

build_tools/build_detect_platform

@@ -322,6 +322,55 @@ EOF
     if [ "$?" = 0 ]; then
         COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_MALLOC_USABLE_SIZE"
     fi
+
+    # Test whether PTHREAD_MUTEX_ADAPTIVE_NP mutex type is available
+    $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
+      #include <pthread.h>
+      int main() {
+        int x = PTHREAD_MUTEX_ADAPTIVE_NP;
+        return 0;
+      }
+EOF
+    if [ "$?" = 0 ]; then
+        COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_PTHREAD_ADAPTIVE_MUTEX"
+    fi
+
+    # Test whether backtrace is available
+    $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
+      #include <execinfo.h>>
+      int main() {
+        void* frames[1];
+        backtrace_symbols(frames, backtrace(frames, 1));
+        return 0;
+      }
+EOF
+    if [ "$?" = 0 ]; then
+        COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_BACKTRACE"
+    else
+        # Test whether execinfo library is installed
+        $CXX $CFLAGS -lexecinfo -x c++ - -o /dev/null 2>/dev/null  <<EOF
+          #include <execinfo.h>
+          int main() {
+            void* frames[1];
+            backtrace_symbols(frames, backtrace(frames, 1));
+          }
+EOF
+        if [ "$?" = 0 ]; then
+            COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_BACKTRACE"
+            PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lexecinfo"
+            JAVA_LDFLAGS="$JAVA_LDFLAGS -lexecinfo"
+        fi
+    fi
+
+    # Test if -pg is supported
+    $CXX $CFLAGS -pg -x c++ - -o /dev/null 2>/dev/null  <<EOF
+      int main() {
+        return 0;
+      }
+EOF
+    if [ "$?" = 0 ]; then
+        PROFILING_FLAGS=-pg
+    fi
 fi
 
 # TODO(tec): Fix -Wshorten-64-to-32 errors on FreeBSD and enable the warning.
@@ -402,3 +451,5 @@ echo "ROCKSDB_MINOR=$ROCKSDB_MINOR" >> "$OUTPUT"
 echo "ROCKSDB_PATCH=$ROCKSDB_PATCH" >> "$OUTPUT"
 echo "CLANG_SCAN_BUILD=$CLANG_SCAN_BUILD" >> "$OUTPUT"
 echo "CLANG_ANALYZER=$CLANG_ANALYZER" >> "$OUTPUT"
+echo "PROFILING_FLAGS=$PROFILING_FLAGS" >> "$OUTPUT"
+

db/db_universal_compaction_test.cc

@@ -955,7 +955,7 @@ TEST_P(DBTestUniversalCompaction, UniversalCompactionFourPaths) {
       new SpecialSkipListFactory(KNumKeysByGenerateNewFile - 1));
   options.compaction_style = kCompactionStyleUniversal;
   options.compaction_options_universal.size_ratio = 5;
-  options.write_buffer_size = 110 << 10;  // 105KB
+  options.write_buffer_size = 111 << 10;  // 114KB
   options.arena_block_size = 4 << 10;
   options.level0_file_num_compaction_trigger = 2;
   options.num_levels = 1;
@@ -1153,8 +1153,7 @@ TEST_P(DBTestUniversalCompaction, UniversalCompactionSecondPathRatio) {
   options.db_paths.emplace_back(dbname_ + "_2", 1024 * 1024 * 1024);
   options.compaction_style = kCompactionStyleUniversal;
   options.compaction_options_universal.size_ratio = 5;
-  options.write_buffer_size = 110 << 10;  // 105KB
-  options.arena_block_size = 4 * 1024;
+  options.write_buffer_size = 111 << 10;  // 114KB
   options.arena_block_size = 4 << 10;
   options.level0_file_num_compaction_trigger = 2;
   options.num_levels = 1;

port/port_posix.cc

@@ -35,7 +35,7 @@ static int PthreadCall(const char* label, int result) {
 }
 
 Mutex::Mutex(bool adaptive) {
-#ifdef OS_LINUX
+#ifdef ROCKSDB_PTHREAD_ADAPTIVE_MUTEX
   if (!adaptive) {
     PthreadCall("init mutex", pthread_mutex_init(&mu_, nullptr));
   } else {
@@ -48,9 +48,9 @@ Mutex::Mutex(bool adaptive) {
     PthreadCall("destroy mutex attr",
                 pthread_mutexattr_destroy(&mutex_attr));
   }
-#else // ignore adaptive for non-linux platform
+#else
   PthreadCall("init mutex", pthread_mutex_init(&mu_, nullptr));
-#endif // OS_LINUX
+#endif // ROCKSDB_PTHREAD_ADAPTIVE_MUTEX
 }
 
 Mutex::~Mutex() { PthreadCall("destroy mutex", pthread_mutex_destroy(&mu_)); }

port/stack_trace.cc

@@ -5,7 +5,7 @@
 //
 #include "port/stack_trace.h"
 
-#if defined(ROCKSDB_LITE) || !(defined(OS_LINUX) || defined(OS_MACOSX)) || \
+#if defined(ROCKSDB_LITE) || !(defined(ROCKSDB_BACKTRACE) || defined(OS_MACOSX)) || \
     defined(CYGWIN)
 
 // noop

util/env_test.cc

@@ -514,7 +514,7 @@ class IoctlFriendlyTmpdir {
         } else {
           // Diagnose ioctl-related failure only if this is the
           // directory specified via that envvar.
-          if (tmp == d) {
+          if (tmp && tmp == d) {
             fprintf(stderr, "TEST_IOCTL_FRIENDLY_TMPDIR-specified directory is "
                     "not suitable: %s\n", d.c_str());
           }

utilities/document/json_document_test.cc

@@ -46,7 +46,7 @@ void AssertField(const JSONDocument& json, const std::string& field,
                  double expected) {
   ASSERT_TRUE(json.Contains(field));
   ASSERT_TRUE(json[field].IsDouble());
-  ASSERT_EQ(expected, json[field].GetDouble());
+  ASSERT_DOUBLE_EQ(expected, json[field].GetDouble());
 }
 }  // namespace