Added support for enumerating all methods that have been JIT compiled

- Added `mono_jit_info_table_foreach`. This function can be used to enumerate all currently JIT compiled methods in a domain.
- Added `mono_domain_jit_foreach`. This function internally just forwards to `mono_jit_info_table_foreach` and is only there for consistency with the existing `mono_domain_foreach`, `mono_domain_assembly_foreach` functions.

Author: rovarma

mono/metadata/appdomain.h

@@ -27,6 +27,7 @@ typedef struct _MonoJitInfo MonoJitInfo;
 
 typedef void (*MonoDomainFunc) (MonoDomain *domain, void* user_data);
 typedef void (*MonoDomainAssemblyFunc) (MonoAssembly *assembly, void* user_data);
+typedef void (*MonoJitInfoFunc)(MonoDomain *domain, MonoMethod* method, MonoJitInfo* jinfo);
 typedef void (*MonoUnityExceptionFunc) (MonoObject* exc);
 
 MONO_API MonoDomain*
@@ -110,6 +111,9 @@ MONO_RT_EXTERNAL_ONLY
 MONO_API MonoDomain *
 mono_domain_from_appdomain (MonoAppDomain *appdomain);
 
+MONO_API void
+mono_domain_jit_foreach (MonoDomain *domain, MonoJitInfoFunc func, void *user_data);
+
 MONO_API void
 mono_domain_foreach        (MonoDomainFunc func, void* user_data);
 

mono/metadata/domain-internals.h

@@ -491,6 +491,9 @@ mono_jit_info_table_free (MonoJitInfoTable *table);
 void
 mono_jit_info_table_add    (MonoDomain *domain, MonoJitInfo *ji);
 
+void
+mono_jit_info_table_foreach (MonoDomain *domain, MonoDomainFunc func, void *user_data);
+
 void
 mono_jit_info_table_remove (MonoDomain *domain, MonoJitInfo *ji);
 

mono/metadata/domain.c

@@ -986,6 +986,12 @@ mono_domain_foreach (MonoDomainFunc func, gpointer user_data)
 	gc_free_fixed_non_heap_list (copy);
 }
 
+MONO_API void
+mono_domain_jit_foreach (MonoDomain *domain, MonoJitInfoFunc func, void *user_data)
+{
+	mono_jit_info_table_foreach (domain, func, user_data);
+}
+
 MONO_API void
 mono_domain_assembly_foreach (MonoDomain* domain, MonoDomainAssemblyFunc func, void* user_data)
 {

mono/metadata/jit-info.c

@@ -750,6 +750,25 @@ mono_jit_info_table_remove (MonoDomain *domain, MonoJitInfo *ji)
 	mono_domain_unlock (domain);
 }
 
+void
+mono_jit_info_table_foreach (MonoDomain *domain, MonoDomainFunc func, void *user_data)
+{
+	mono_domain_lock (domain);
+
+	MonoJitInfoTable *table = domain->jit_info_table;
+	for (int chunk_index = 0; chunk_index < table->num_chunks; ++chunk_index) {
+		for (int info_index = 0; info_index < table->chunks[chunk_index]->num_elements; ++info_index) {
+			MonoJitInfo *ji = table->chunks[chunk_index]->data[info_index];
+			if (IS_JIT_INFO_TOMBSTONE (ji) || ji->is_trampoline)
+				continue;
+
+			func (domain, ji->d.method, ji);
+		}
+	}
+
+	mono_domain_unlock (domain);
+}
+
 void
 mono_jit_info_add_aot_module (MonoImage *image, gpointer start, gpointer end)
 {