4987 - support `browse_trace` tool in SubX

I've extracted it into a separate binary, independent of my Mu prototype.

I also cleaned up my tracing layer to be a little nicer. Major improvements:

- Realized that incremental tracing really ought to be the default.
  And to minimize printing traces to screen.

- Finally figured out how to combine layers and call stack frames in a
  single dimension of depth. The answer: optimize for the experience of
  `browse_trace`. Instructions occupy a range of depths based on their call
  stack frame, and minor details of an instruction lie one level deeper
  in each case.

Other than that, I spent some time adjusting levels everywhere to make
`browse_trace` useful.

1 files changed, 1 insertions, 1 deletions

diff --git a/069hash.cc b/069hash.cc
index c810f98b..3a371233 100644
--- a/069hash.cc
+++ b/069hash.cc
@@ -55,7 +55,7 @@ size_t hash_mu_scalar(size_t h, const reagent& r) {
 
 size_t hash_mu_address(size_t h, reagent& r) {
   if (r.value == 0) return 0;
-  trace("mem") << "location " << r.value << " is " << no_scientific(get_or_insert(Memory, r.value)) << end();
+  trace(Callstack_depth+1, "mem") << "location " << r.value << " is " << no_scientific(get_or_insert(Memory, r.value)) << end();
   r.set_value(get_or_insert(Memory, r.value));
   drop_from_type(r, "address");
   return hash(h, r);