[clang] [compiler-rt] Reapply " [XRay] Add support for instrumentation of DSOs on x86_64 (#90959)" (PR #112930)

[Jan Patrick Lehr via cfe-commits]

================
@@ -150,21 +151,30 @@ class MProtectHelper {
 
 namespace {
 
-bool patchSled(const XRaySledEntry &Sled, bool Enable,
-               int32_t FuncId) XRAY_NEVER_INSTRUMENT {
+bool isObjectLoaded(int32_t ObjId) {
+  SpinMutexLock Guard(&XRayInstrMapMutex);
+  if (ObjId < 0 || static_cast<uint32_t>(ObjId) >=
+                       atomic_load(&XRayNumObjects, memory_order_acquire)) {
+    return false;
+  }
+  return XRayInstrMaps[ObjId].Loaded;
+}
+
+bool patchSled(const XRaySledEntry &Sled, bool Enable, int32_t FuncId,
+               const XRayTrampolines &Trampolines) XRAY_NEVER_INSTRUMENT {
   bool Success = false;
   switch (Sled.Kind) {
   case XRayEntryType::ENTRY:
-    Success = patchFunctionEntry(Enable, FuncId, Sled, __xray_FunctionEntry);
+    Success = patchFunctionEntry(Enable, FuncId, Sled, Trampolines, false);
----------------
jplehr wrote:

```suggestion
    Success = patchFunctionEntry(Enable, FuncId, Sled, Trampolines, /* LogArgs=*/false);
```
There is some syntax like that, that is understood by clang-format and that helps to know what this is actually doing.

https://github.com/llvm/llvm-project/pull/112930