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

[Jan Patrick Lehr via cfe-commits]

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@@ -50,14 +52,72 @@ atomic_uint8_t XRayInitialized{0};
 
 // This should always be updated before XRayInitialized is updated.
 SpinMutex XRayInstrMapMutex;
-XRaySledMap XRayInstrMap;
+// XRaySledMap XRayInstrMap;
+//  Contains maps for the main executable as well as DSOs.
+// std::vector<XRaySledMap> XRayInstrMaps;
+XRaySledMap *XRayInstrMaps;
+atomic_uint32_t XRayNumObjects;
 
 // Global flag to determine whether the flags have been initialized.
 atomic_uint8_t XRayFlagsInitialized{0};
 
 // A mutex to allow only one thread to initialize the XRay data structures.
 SpinMutex XRayInitMutex;
 
+int32_t
+__xray_register_sleds(const XRaySledEntry *SledsBegin,
+                      const XRaySledEntry *SledsEnd,
+                      const XRayFunctionSledIndex *FnIndexBegin,
+                      const XRayFunctionSledIndex *FnIndexEnd, bool FromDSO,
+                      XRayTrampolines Trampolines) XRAY_NEVER_INSTRUMENT {
+  if (!SledsBegin || !SledsEnd) {
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jplehr wrote:

No curly here

https://github.com/llvm/llvm-project/pull/90959