drcov2lcov produce wrong coverage information

From zhao...@chromium.org on July 23, 2014 00:06:04

00:05|zhaoqin@zhaoqin01:~/Workspace/DynamoRIO/builds/tmp

../build_x64_dbg.git/clients/bin64/drcov2lcov -dir ./ -mod_filter "Debug/" -src_filter "net/" [DRCOV2LCOV] WARNING(1): Missing output, use coverage.info instead [DRCOV2LCOV] INFO(1): Reading input files... [DRCOV2LCOV] INFO(1): Enumerating line info... [DRCOV2LCOV] INFO(1): Writing output file...

00:05|zhaoqin@zhaoqin01:~/Workspace/DynamoRIO/builds/tmp

grep ",0" coverage.info | wc -l 0

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=1480