[compiler-rt] Support MemProf on darwin (PR #69640)

[Teresa Johnson via llvm-commits]

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@@ -279,13 +286,54 @@ struct Allocator {
     Print(Value->mib, Key, bool(Arg));
   }
 
+  using SegmentEntry = ::llvm::memprof::SegmentEntry;
   void FinishAndWrite() {
     if (print_text && common_flags()->print_module_map)
       DumpProcessMap();
 
     allocator.ForceLock();
 
     InsertLiveBlocks();
+#if SANITIZER_APPLE
+    if (print_binary_refs) {
+      __sanitizer::ListOfModules List;
+      List.init();
+      ArrayRef<LoadedModule> Modules(List.begin(), List.end());
+      for (const auto &Module : Modules) {
+        for (const auto &Segment : Module.ranges()) {
+          if (true) { // Segment.executable) {
+            SegmentEntry Entry(Segment.beg, Segment.end, Module.base_address());
+            // CHECK(Module.uuid_size() <= MEMPROF_BUILDID_MAX_SIZE);
+            // Entry.BuildIdSize = Module.uuid_size();
+            memcpy(Entry.BuildId, Module.uuid(), Module.uuid_size());
+            // Print out the segment information.
+            Printf("  -\n");
+            Printf("[MemProf] BuildId: ");
+            for (size_t I = 0; I < Module.uuid_size() /*Entry.BuildIdSize*/;
+                 I++) {
+              Printf("%02x", Entry.BuildId[I]);
+            }
+            Printf("\n");
+            Printf("[MemProf] BuildIdName: %s\n", Module.full_name());
+            // If it is the main binary, check shadow.
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teresajohnson wrote:

How do you know if it is the main binary?

https://github.com/llvm/llvm-project/pull/69640