[llvm] [llvm-c] Expose debug object registration in Orc C-API bindings (PR #73257)

[Stefan Gränitz via llvm-commits]

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@@ -494,6 +496,70 @@ TEST_F(OrcCAPITestBase, AddObjectBuffer) {
   ASSERT_TRUE(!!SumAddr);
 }
 
+// This must be kept in sync with gdb/gdb/jit.h .
+extern "C" {
+
+typedef enum {
+  JIT_NOACTION = 0,
+  JIT_REGISTER_FN,
+  JIT_UNREGISTER_FN
+} jit_actions_t;
+
+struct jit_code_entry {
+  struct jit_code_entry *next_entry;
+  struct jit_code_entry *prev_entry;
+  const char *symfile_addr;
+  uint64_t symfile_size;
+};
+
+struct jit_descriptor {
+  uint32_t version;
+  // This should be jit_actions_t, but we want to be specific about the
+  // bit-width.
+  uint32_t action_flag;
+  struct jit_code_entry *relevant_entry;
+  struct jit_code_entry *first_entry;
+};
+
+// We put information about the JITed function in this global, which the
+// debugger reads.  Make sure to specify the version statically, because the
+// debugger checks the version before we can set it during runtime.
+extern "C" struct jit_descriptor __jit_debug_descriptor;
+}
+
+#if defined(_AIX)
+TEST_F(OrcCAPITestBase, DISABLED_RegisterJITLoaderGDB) {
+#else
+TEST_F(OrcCAPITestBase, RegisterJITLoaderGDB) {
+#endif
+  LLVMOrcObjectLayerRef ObjLayer = LLVMOrcLLJITGetObjLinkingLayer(Jit);
+  auto *ObjLinkingLayer = cast<orc::ObjectLinkingLayer>(unwrap(ObjLayer));
+  ASSERT_TRUE(ObjLinkingLayer);
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weliveindetail wrote:

Changed it following (2) and disabled tests on non-ELF targets.

https://github.com/llvm/llvm-project/pull/73257