trace: Add four generic circuit tracepoints

Signed-off-by: David Goulet <dgoulet@torproject.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/core/or/circuitlist.c b/src/core/or/circuitlist.c
index f4d6cd3c12..10fba498ad 100644
--- a/src/core/or/circuitlist.c
+++ b/src/core/or/circuitlist.c
@@ -65,6 +65,7 @@
 #include "core/or/circuitpadding.h"
 #include "core/or/crypt_path.h"
 #include "core/or/extendinfo.h"
+#include "core/or/trace_probes_circuit.h"
 #include "core/mainloop/connection.h"
 #include "app/config/config.h"
 #include "core/or/connection_edge.h"
@@ -99,6 +100,7 @@
 #include "lib/compress/compress_zlib.h"
 #include "lib/compress/compress_zstd.h"
 #include "lib/buf/buffers.h"
+#include "lib/trace/events.h"
 
 #include "core/or/ocirc_event.h"
 
@@ -565,6 +567,8 @@ circuit_set_state(circuit_t *circ, uint8_t state)
   }
   if (state == CIRCUIT_STATE_GUARD_WAIT || state == CIRCUIT_STATE_OPEN)
     tor_assert(!circ->n_chan_create_cell);
+
+  tor_trace(circuit, change_state, circ, circ->state, state);
   circ->state = state;
   if (CIRCUIT_IS_ORIGIN(circ))
     circuit_state_publish(circ);
@@ -1253,6 +1257,10 @@ circuit_free_(circuit_t *circ)
   /* Clear all dangling handle references. */
   circuit_handles_clear(circ);
 
+  /* Tracepoint. Data within the circuit object is recorded so do this before
+   * the actual memory free. */
+  tor_trace(circuit, free, circ);
+
   if (should_free) {
     memwipe(mem, 0xAA, memlen); /* poison memory */
     tor_free(mem);
@@ -2275,6 +2283,7 @@ circuit_mark_for_close_, (circuit_t *circ, int reason, int line,
            CIRCUIT_IS_ORIGIN(circ) ?
               TO_ORIGIN_CIRCUIT(circ)->global_identifier : 0,
            file, line, orig_reason, reason);
+  tor_trace(circuit, mark_for_close, circ);
 }
 
 /** Called immediately before freeing a marked circuit <b>circ</b> from