stopping other threads.

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/substitute-internal.h b/lib/substitute-internal.h
index f078688..80052f9 100644
--- a/lib/substitute-internal.h
+++ b/lib/substitute-internal.h
@@ -64,9 +64,15 @@ enum {
      * is to be root */
     SUBSTITUTE_ERR_TASK_FOR_PID = 1000,
 
-    /* substitute_dlopen_in_pid: something didn't work */
     SUBSTITUTE_ERR_MISC,
 };
 
 int substitute_dlopen_in_pid(int pid, const char *filename, int options, char **error);
 #endif
+
+/* Stop the world; return token to be used for applying PC patches and resuming. */
+int stop_other_threads(void **token_ptr);
+int apply_pc_patch_callback(void *token,
+                            uintptr_t (*pc_patch_callback)(void *ctx, uintptr_t pc),
+                            void *ctx);
+int resume_other_threads(void *token);