sstables: print sstable path in case of an exception

Without that, we don't know where to look for the problems

Before:

 compaction failed: sstables::malformed_sstable_exception (Too big ttl: 3163676957)

After:

 compaction_manager - compaction failed: sstables::malformed_sstable_exception (Too big ttl: 4294967295 in sstable /var/lib/scylla/data/system_traces/events-8826e8e9e16a372887533bc1fc713c25/mc-832-big-Data.db)

Signed-off-by: Glauber Costa <glauber@scylladb.com>
Message-Id: <20181016181004.17838-1-glauber@scylladb.com>
(cherry picked from commit 7edae5421d)

sstables/row.hh

@@ -241,6 +241,7 @@ private:
     } _state = state::ROW_START;
 
     row_consumer& _consumer;
+    shared_sstable _sst;
 
     temporary_buffer<char> _key;
     temporary_buffer<char> _val;
@@ -270,6 +271,14 @@ public:
     // leave only the unprocessed part. The caller must handle calling
     // process() again, and/or refilling the buffer, as needed.
     data_consumer::processing_result process_state(temporary_buffer<char>& data) {
+        try {
+            return do_process_state(data);
+        } catch (malformed_sstable_exception& exp) {
+            throw malformed_sstable_exception(exp.what(), _sst->get_filename());
+        }
+    }
+private:
+    data_consumer::processing_result do_process_state(temporary_buffer<char>& data) {
 #if 0
         // Testing hack: call process() for tiny chunks separately, to verify
         // that primitive types crossing input buffer are handled correctly.
@@ -508,13 +517,15 @@ public:
 
         return row_consumer::proceed::yes;
     }
+public:
 
     data_consume_rows_context(const schema&,
-                              const shared_sstable&,
+                              const shared_sstable& sst,
                               row_consumer& consumer,
                               input_stream<char>&& input, uint64_t start, uint64_t maxlen)
                 : continuous_data_consumer(std::move(input), start, maxlen)
-                , _consumer(consumer) {
+                , _consumer(consumer)
+                , _sst(sst) {
     }
 
     void verify_end_state() {
@@ -610,6 +621,7 @@ private:
     } _state = state::PARTITION_START;
 
     consumer_m& _consumer;
+    shared_sstable _sst;
     const serialization_header& _header;
     column_translation _column_translation;
 
@@ -753,6 +765,14 @@ public:
     }
 
     data_consumer::processing_result process_state(temporary_buffer<char>& data) {
+        try {
+            return do_process_state(data);
+        } catch (malformed_sstable_exception& exp) {
+            throw malformed_sstable_exception(exp.what(), _sst->get_filename());
+        }
+    }
+private:
+    data_consumer::processing_result do_process_state(temporary_buffer<char>& data) {
         switch (_state) {
         case state::PARTITION_START:
         partition_start_label:
@@ -1277,6 +1297,7 @@ public:
 
         return row_consumer::proceed::yes;
     }
+public:
 
     data_consume_rows_context_m(const schema& s,
                                 const shared_sstable& sst,
@@ -1286,6 +1307,7 @@ public:
                                 uint64_t maxlen)
         : continuous_data_consumer(std::move(input), start, maxlen)
         , _consumer(consumer)
+        , _sst(sst)
         , _header(sst->get_serialization_header())
         , _column_translation(sst->get_column_translation(s, _header))
         , _liveness(_header)