Revert "Mark asan fake stacks during machine stack marking"

This reverts commit d10bc3a2b8300cffc383e10c3730871e851be24c.

1 files changed, 0 insertions, 63 deletions

diff --git a/internal/sanitizers.h b/internal/sanitizers.h
index 3fc31b350e..d444903aa0 100644
--- a/internal/sanitizers.h
+++ b/internal/sanitizers.h
@@ -213,67 +213,4 @@ asan_get_real_stack_addr(void* slot)
     return addr ? addr : slot;
 }
 
-/*!
- * Gets the current thread's fake stack handle, which can be passed into get_fake_stack_extents
- *
- * \retval An opaque value which can be passed to asan_get_fake_stack_extents
- */
-static inline void *
-asan_get_thread_fake_stack_handle(void)
-{
-    return __asan_get_current_fake_stack();
-}
-
-/*!
- * Checks if the given VALUE _actually_ represents a pointer to an ASAN fake stack.
- *
- * If the given slot _is_ actually a reference to an ASAN fake stack, and that fake stack
- * contains the real values for the passed-in range of machine stack addresses, returns true
- * and the range of the fake stack through the outparams.
- *
- * Otherwise, returns false, and sets the outparams to NULL.
- *
- * Note that this function expects "start" to be > "end" on downward-growing stack architectures;
- *
- * \param[in]  thread_fake_stack_handle  The asan fake stack reference for the thread we're scanning
- * \param[in]  slot                      The value on the machine stack we want to inspect
- * \param[in]  machine_stack_start       The extents of the real machine stack on which slot lives
- * \param[in]  machine_stack_end         The extents of the real machine stack on which slot lives
- * \param[out] fake_stack_start_out      The extents of the fake stack which contains real VALUEs
- * \param[out] fake_stack_end_out        The extents of the fake stack which contains real VALUEs
- * \return                               Whether slot is a pointer to a fake stack for the given machine stack range
-*/
-
-static inline bool
-asan_get_fake_stack_extents(void *thread_fake_stack_handle, VALUE slot,
-                            void *machine_stack_start, void *machine_stack_end,
-                            void **fake_stack_start_out, void **fake_stack_end_out)
-{
-    /* the ifdef is needed here to suppress a warning about fake_frame_{start/end} being
-       uninitialized if __asan_addr_is_in_fake_stack is an empty macro */
-#ifdef RUBY_ASAN_ENABLED
-    void *fake_frame_start;
-    void *fake_frame_end;
-    void *real_stack_frame = __asan_addr_is_in_fake_stack(
-        thread_fake_stack_handle, (void *)slot, &fake_frame_start, &fake_frame_end
-    );
-    if (real_stack_frame) {
-        bool in_range;
-#if STACK_GROW_DIRECTION < 0
-        in_range = machine_stack_start >= real_stack_frame && real_stack_frame >= machine_stack_end;
-#else
-        in_range = machine_stack_start <= real_stack_frame && real_stack_frame <= machine_stack_end;
-#endif
-        if (in_range) {
-            *fake_stack_start_out = fake_frame_start;
-            *fake_stack_end_out = fake_frame_end;
-            return true;
-        }
-    }
-#endif
-    *fake_stack_start_out = 0;
-    *fake_stack_end_out = 0;
-    return false;
-}
-
 #endif /* INTERNAL_SANITIZERS_H */