runtime/race: say where the memory block was allocated #6690
Description
C++ ThreadSanitizer describes where the memory involved in report was allocated: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/lit_tests/malloc_stack.cc?revision=187875&;view=markup It would be useful to do the same for Go. C++ ThreadSanitizer can also pronounce the name of the global (if the race in on global). Look if it's possible in Go.