Set clang frame layout as default for macOS aarch64

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jbachorik

ddprof-lib/src/main/cpp/dwarf.h

@@ -83,6 +83,14 @@ struct FrameDesc {
     static FrameDesc default_clang_frame;
     static FrameDesc no_dwarf_frame;
 
+    static const FrameDesc& default_native_frame() {
+#if defined(__APPLE__) && defined(__aarch64__)
+        return default_clang_frame;
+#else
+        return default_frame;
+#endif
+    }
+
     static int comparator(const void* p1, const void* p2) {
         FrameDesc* fd1 = (FrameDesc*)p1;
         FrameDesc* fd2 = (FrameDesc*)p2;

ddprof-lib/src/main/cpp/stackWalker.cpp

@@ -158,11 +158,7 @@ int StackWalker::walkDwarf(void* ucontext, const void** callchain, int max_depth
 
         uintptr_t prev_sp = sp;
         CodeCache* cc = profiler->findLibraryByAddress(pc);
-#if defined(__APPLE__) && defined(__aarch64__)
-        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_clang_frame;
-#else
-        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_frame;
-#endif
+        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_native_frame();
 
         u8 cfa_reg = (u8)f.cfa;
         int cfa_off = f.cfa >> 8;
@@ -698,11 +694,7 @@ __attribute__((no_sanitize("address"))) int StackWalker::walkVM(void* ucontext,
         dwarf_unwind:
         uintptr_t prev_sp = sp;
         CodeCache* cc = profiler->findLibraryByAddress(pc);
-#if defined(__APPLE__) && defined(__aarch64__)
-        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_clang_frame;
-#else
-        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_frame;
-#endif
+        FrameDesc f = cc != NULL ? cc->findFrameDesc(pc) : FrameDesc::default_native_frame();
 
         u8 cfa_reg = (u8)f.cfa;
         int cfa_off = f.cfa >> 8;

ddprof-lib/src/main/cpp/symbols_macos.cpp

@@ -12,6 +12,7 @@
 #include <mach-o/loader.h>
 #include <mach-o/nlist.h>
 #include "symbols.h"
+#include "dwarf.h"
 #include "log.h"
 
 UnloadProtection::UnloadProtection(const CodeCache *cc) {
@@ -212,6 +213,7 @@ void Symbols::parseLibraries(CodeCacheArray* array, bool kernel_symbols) {
             if (!parser.parse()) {
                 Log::warn("Could not parse symbols from %s", path);
             }
+            cc->setDwarfTable(NULL, 0, FrameDesc::default_native_frame());
             cc->sort();
             if (!array->add(cc)) {
                 delete cc;