diff --git a/debuggerd/utility.h b/debuggerd/utility.h
index 39f91cb..136f46d 100644
--- a/debuggerd/utility.h
+++ b/debuggerd/utility.h
@@ -20,53 +20,35 @@
 
 #include <stddef.h>
 #include <stdbool.h>
-#include <sys/types.h>
-#include <corkscrew/backtrace.h>
+
+typedef struct {
+    /* tombstone file descriptor */
+    int tfd;
+    /* if true, does not log anything to the Android logcat */
+    bool quiet;
+} log_t;
 
 /* Log information onto the tombstone. */
-void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
+void _LOG(log_t* log, bool in_tombstone_only, const char *fmt, ...)
         __attribute__ ((format(printf, 3, 4)));
 
-#define LOG(fmt...) _LOG(-1, 0, fmt)
+#define LOG(fmt...) _LOG(NULL, 0, fmt)
 
 /* Set to 1 for normal debug traces */
 #if 0
-#define XLOG(fmt...) _LOG(-1, 0, fmt)
+#define XLOG(fmt...) _LOG(NULL, 0, fmt)
 #else
 #define XLOG(fmt...) do {} while(0)
 #endif
 
 /* Set to 1 for chatty debug traces. Includes all resolved dynamic symbols */
 #if 0
-#define XLOG2(fmt...) _LOG(-1, 0, fmt)
+#define XLOG2(fmt...) _LOG(NULL, 0, fmt)
 #else
 #define XLOG2(fmt...) do {} while(0)
 #endif
 
-/*
- * Returns true if the specified signal has an associated address.
- * (i.e. it sets siginfo_t.si_addr).
- */
-bool signal_has_address(int sig);
-
-/*
- * Dumps the backtrace and contents of the stack.
- */
-void dump_backtrace_and_stack(const ptrace_context_t* context, int tfd, pid_t tid, bool at_fault);
-
-/*
- * Dumps a few bytes of memory, starting a bit before and ending a bit
- * after the specified address.
- */
-void dump_memory(int tfd, pid_t tid, uintptr_t addr, bool at_fault);
-
-/*
- * If this isn't clearly a null pointer dereference, dump the
- * /proc/maps entries near the fault address.
- *
- * This only makes sense to do on the thread that crashed.
- */
-void dump_nearby_maps(const ptrace_context_t* context, int tfd, pid_t tid);
-
+int wait_for_signal(pid_t tid, int* total_sleep_time_usec);
+void wait_for_stop(pid_t tid, int* total_sleep_time_usec);
 
 #endif // _DEBUGGERD_UTILITY_H