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[mono][aot] Load AOT module of a container assembly using assembly name #83511

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merged 8 commits into from
Mar 20, 2023
Merged

[mono][aot] Load AOT module of a container assembly using assembly name #83511

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c7d7401
Load AOT module of a container assembly using assembly name
kotlarmilos Mar 16, 2023
6fc980f
Use mono_image_init to init the image
kotlarmilos Mar 16, 2023
8d9a0ad
Set container_assm_name to NULL to avoid race conditioning
kotlarmilos Mar 17, 2023
b9531f5
Implement mono_loader_lock on load_container_amodule
kotlarmilos Mar 17, 2023
faa9f72
Update the condition to include container_assm_name
kotlarmilos Mar 17, 2023
d233bfb
Remove redundant local_ref var
kotlarmilos Mar 17, 2023
8dc8fef
Avoid recursive invocation by setting container_assm_name to NULL
kotlarmilos Mar 20, 2023
d0f66a3
Fix ident
kotlarmilos Mar 20, 2023
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55 changes: 33 additions & 22 deletions src/mono/mono/mini/aot-runtime.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2433,35 +2433,46 @@ mono_aot_init (void)
/*
* load_container_amodule:
*
* Load the container assembly and its AOT image.
* Load AOT module of a container assembly
*/
static void
load_container_amodule (MonoAssemblyLoadContext *alc)
{
ERROR_DECL (error);

// If container_amodule loaded, don't lock the runtime
if (!container_assm_name || container_amodule)
return;

char *local_ref = container_assm_name;
container_assm_name = NULL;
MonoImageOpenStatus status = MONO_IMAGE_OK;
MonoAssemblyOpenRequest req;
gchar *dll = g_strdup_printf ( "%s.dll", local_ref);
/*
* Don't fire managed assembly load events whose execution
* might require this module to be already loaded.
*/
mono_assembly_request_prepare_open (&req, alc);
req.request.no_managed_load_event = TRUE;
MonoAssembly *assm = mono_assembly_request_open (dll, &req, &status);
if (!assm) {
gchar *exe = g_strdup_printf ("%s.exe", local_ref);
assm = mono_assembly_request_open (exe, &req, &status);
}
g_assert (assm);
load_aot_module (alc, assm, NULL, error);
container_amodule = assm->image->aot_module;
mono_loader_lock ();
// There might be several threads that passed the first check
// Adding another check to ensure single load of a container assembly due to race condition
if (!container_amodule) {
ERROR_DECL (error);

// This method is recursively invoked within the same thread during AOT module loads
// It avoids recursive invocation by setting container_assm_name to NULL
char *local_ref = container_assm_name;
container_assm_name = NULL;

// Create a fake MonoAssembly/MonoImage to retrieve its AOT module.
// Container MonoAssembly/MonoImage shouldn't be used during the runtime.
MonoAssembly *assm = g_new0 (MonoAssembly, 1);
assm->image = g_new0 (MonoImage, 1);
assm->image->dynamic = 0;
assm->image->alc = alc;
assm->aname.name = local_ref;

mono_image_init (assm->image);
MonoAotFileInfo* info = (MonoAotFileInfo *)g_hash_table_lookup (static_aot_modules, assm->aname.name);
assm->image->guid = (char*)info->assembly_guid;
mono_assembly_addref (assm);

load_aot_module(alc, assm, NULL, error);
mono_memory_barrier ();
g_assert (assm->image->aot_module);
container_amodule = assm->image->aot_module;
}

mono_loader_unlock ();
}

static gboolean
Expand Down