Does Valgrind have an API like Purify / Quantify that allows you to disable data writing?

The client program can use callgrind specific client requests to control the callgrind tool (enable and disable profiling), unfortunately memcheck client requests (for obvious reasons ¹ ) do not allow using the same control.

_{¹ memory error checking depends on the fact that it monitors the entire state of memory to the current point in time}