Fix backtrace beyond _singtramp on macOS arm64 (#7015)

* move ptrauth_strip logic into vm_dump.c
* don't use _sigtramp special logic on arm64

1 files changed, 0 insertions, 9 deletions

diff --git a/addr2line.c b/addr2line.c
index 77538f6eb9..f7d5b0239b 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -2549,15 +2549,6 @@ rb_dump_backtrace_with_lines(int num_traces, void **traces)
     /* 2 is NULL + main executable */
     void **dladdr_fbases = (void **)calloc(num_traces+2, sizeof(void *));
 
-#if defined(__APPLE__) && defined(__aarch64__)
-    // Strip Arm64's pointer authentication.
-    for (i = 0; i < num_traces; i++) {
-        // I wish I could use "ptrauth_strip()" but I get an error:
-        // "this target does not support pointer authentication"
-        traces[i] = (void*)(((uint64_t)traces[i]) & 0x7fffffffffffull);
-    }
-#endif
-
 #ifdef HAVE_MAIN_EXE_PATH
     char *main_path = NULL; /* used on printing backtrace */
     ssize_t len;