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mini-runtime.c
5016 lines (4272 loc) · 162 KB
/
mini-runtime.c
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/**
* \file
* Runtime code for the JIT
*
* Authors:
* Paolo Molaro (lupus@ximian.com)
* Dietmar Maurer (dietmar@ximian.com)
*
* Copyright 2002-2003 Ximian, Inc.
* Copyright 2003-2010 Novell, Inc.
* Copyright 2011-2015 Xamarin, Inc (http://www.xamarin.com)
* Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include <config.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <mono/utils/memcheck.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/assembly-internals.h>
#include <mono/metadata/loader.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/class.h>
#include <mono/metadata/object.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/domain-internals.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/mono-config.h>
#include <mono/metadata/environment.h>
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/gc-internals.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/mempool-internals.h>
#include <mono/metadata/attach.h>
#include <mono/metadata/runtime.h>
#include <mono/metadata/reflection-internals.h>
#include <mono/metadata/monitor.h>
#include <mono/metadata/icall-internals.h>
#include <mono/metadata/loader-internals.h>
#define MONO_MATH_DECLARE_ALL 1
#include <mono/utils/mono-math.h>
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-counters.h>
#include <mono/utils/mono-error-internals.h>
#include <mono/utils/mono-logger-internals.h>
#include <mono/utils/mono-mmap.h>
#include <mono/utils/mono-path.h>
#include <mono/utils/mono-tls.h>
#include <mono/utils/mono-hwcap.h>
#include <mono/utils/dtrace.h>
#include <mono/utils/mono-signal-handler.h>
#include <mono/utils/mono-threads.h>
#include <mono/utils/mono-threads-coop.h>
#include <mono/utils/checked-build.h>
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-proclib.h>
#include <mono/metadata/w32handle.h>
#include <mono/metadata/threadpool.h>
#include "mini.h"
#include "seq-points.h"
#include "tasklets.h"
#include <string.h>
#include <ctype.h>
#include "trace.h"
#include "version.h"
#include "aot-compiler.h"
#include "aot-runtime.h"
#include "llvmonly-runtime.h"
#include "jit-icalls.h"
#include "mini-gc.h"
#include "mini-llvm.h"
#include "debugger-agent.h"
#include "lldb.h"
#include "mini-runtime.h"
#include "interp/interp.h"
#ifdef MONO_ARCH_LLVM_SUPPORTED
#ifdef ENABLE_LLVM
#include "mini-llvm-cpp.h"
#include "llvm-jit.h"
#endif
#endif
#include "mono/metadata/icall-signatures.h"
static guint32 default_opt = 0;
static gboolean default_opt_set = FALSE;
gboolean mono_compile_aot = FALSE;
/* If this is set, no code is generated dynamically, everything is taken from AOT files */
gboolean mono_aot_only = FALSE;
/* Same as mono_aot_only, but only LLVM compiled code is used, no trampolines */
gboolean mono_llvm_only = FALSE;
/* By default, don't require AOT but attempt to probe */
MonoAotMode mono_aot_mode = MONO_AOT_MODE_NORMAL;
MonoEEFeatures mono_ee_features;
const char *mono_build_date;
gboolean mono_do_signal_chaining;
gboolean mono_do_crash_chaining;
int mini_verbose = 0;
/*
* This flag controls whenever the runtime uses LLVM for JIT compilation, and whenever
* it can load AOT code compiled by LLVM.
*/
gboolean mono_use_llvm = FALSE;
gboolean mono_use_interpreter = FALSE;
const char *mono_interp_opts_string = NULL;
#define mono_jit_lock() mono_os_mutex_lock (&jit_mutex)
#define mono_jit_unlock() mono_os_mutex_unlock (&jit_mutex)
static mono_mutex_t jit_mutex;
static MonoCodeManager *global_codeman;
MonoDebugOptions mini_debug_options;
char *sdb_options;
#ifdef VALGRIND_JIT_REGISTER_MAP
int valgrind_register;
#endif
GList* mono_aot_paths;
static GPtrArray *profile_options;
static GSList *tramp_infos;
GSList *mono_interp_only_classes;
static void register_icalls (void);
gboolean
mono_running_on_valgrind (void)
{
#ifndef HOST_WIN32
if (RUNNING_ON_VALGRIND){
#ifdef VALGRIND_JIT_REGISTER_MAP
valgrind_register = TRUE;
#endif
return TRUE;
} else
#endif
return FALSE;
}
void
mono_set_use_llvm (mono_bool use_llvm)
{
mono_use_llvm = (gboolean)use_llvm;
}
typedef struct {
void *ip;
MonoMethod *method;
} FindTrampUserData;
static void
find_tramp (gpointer key, gpointer value, gpointer user_data)
{
FindTrampUserData *ud = (FindTrampUserData*)user_data;
if (value == ud->ip)
ud->method = (MonoMethod*)key;
}
/* debug function */
char*
mono_get_method_from_ip (void *ip)
{
MonoJitInfo *ji;
MonoMethod *method;
char *method_name;
char *res;
MonoDomain *domain = mono_domain_get ();
MonoDebugSourceLocation *location;
FindTrampUserData user_data;
if (!domain)
domain = mono_get_root_domain ();
ji = mono_jit_info_table_find_internal (domain, ip, TRUE, TRUE);
if (!ji) {
user_data.ip = ip;
user_data.method = NULL;
mono_domain_lock (domain);
g_hash_table_foreach (domain_jit_info (domain)->jit_trampoline_hash, find_tramp, &user_data);
mono_domain_unlock (domain);
if (user_data.method) {
char *mname = mono_method_full_name (user_data.method, TRUE);
res = g_strdup_printf ("<%p - JIT trampoline for %s>", ip, mname);
g_free (mname);
return res;
}
else
return NULL;
} else if (ji->is_trampoline) {
res = g_strdup_printf ("<%p - %s trampoline>", ip, ji->d.tramp_info->name);
return res;
}
method = jinfo_get_method (ji);
method_name = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_IL);
location = mono_debug_lookup_source_location (method, (guint32)((guint8*)ip - (guint8*)ji->code_start), domain);
char *file_loc = NULL;
if (location)
file_loc = g_strdup_printf ("[%s :: %du]", location->source_file, location->row);
res = g_strdup_printf (" %s [{%p} + 0x%x] %s (%p %p) [%p - %s]", method_name, method, (int)((char*)ip - (char*)ji->code_start), file_loc ? file_loc : "", ji->code_start, (char*)ji->code_start + ji->code_size, domain, domain->friendly_name);
mono_debug_free_source_location (location);
g_free (method_name);
g_free (file_loc);
return res;
}
/**
* mono_pmip:
* \param ip an instruction pointer address
*
* This method is used from a debugger to get the name of the
* method at address \p ip. This routine is typically invoked from
* a debugger like this:
*
* (gdb) print mono_pmip ($pc)
*
* \returns the name of the method at address \p ip.
*/
G_GNUC_UNUSED char *
mono_pmip (void *ip)
{
return mono_get_method_from_ip (ip);
}
/**
* mono_print_method_from_ip:
* \param ip an instruction pointer address
*
* This method is used from a debugger to get the name of the
* method at address \p ip.
*
* This prints the name of the method at address \p ip in the standard
* output. Unlike \c mono_pmip which returns a string, this routine
* prints the value on the standard output.
*/
MONO_ATTR_USED void
mono_print_method_from_ip (void *ip)
{
MonoJitInfo *ji;
char *method;
MonoDebugSourceLocation *source;
MonoDomain *domain = mono_domain_get ();
MonoDomain *target_domain = mono_domain_get ();
FindTrampUserData user_data;
MonoGenericSharingContext*gsctx;
const char *shared_type;
if (!domain)
domain = mono_get_root_domain ();
ji = mini_jit_info_table_find_ext (domain, (char *)ip, TRUE, &target_domain);
if (ji && ji->is_trampoline) {
MonoTrampInfo *tinfo = ji->d.tramp_info;
printf ("IP %p is at offset 0x%x of trampoline '%s'.\n", ip, (int)((guint8*)ip - tinfo->code), tinfo->name);
return;
}
if (!ji) {
user_data.ip = ip;
user_data.method = NULL;
mono_domain_lock (domain);
g_hash_table_foreach (domain_jit_info (domain)->jit_trampoline_hash, find_tramp, &user_data);
mono_domain_unlock (domain);
if (user_data.method) {
char *mname = mono_method_full_name (user_data.method, TRUE);
printf ("IP %p is a JIT trampoline for %s\n", ip, mname);
g_free (mname);
return;
}
g_print ("No method at %p\n", ip);
fflush (stdout);
return;
}
method = mono_method_full_name (jinfo_get_method (ji), TRUE);
source = mono_debug_lookup_source_location (jinfo_get_method (ji), (guint32)((guint8*)ip - (guint8*)ji->code_start), target_domain);
gsctx = mono_jit_info_get_generic_sharing_context (ji);
shared_type = "";
if (gsctx) {
if (gsctx->is_gsharedvt)
shared_type = "gsharedvt ";
else
shared_type = "gshared ";
}
g_print ("IP %p at offset 0x%x of %smethod %s (%p %p)[domain %p - %s]\n", ip, (int)((char*)ip - (char*)ji->code_start), shared_type, method, ji->code_start, (char*)ji->code_start + ji->code_size, target_domain, target_domain->friendly_name);
if (source)
g_print ("%s:%d\n", source->source_file, source->row);
fflush (stdout);
mono_debug_free_source_location (source);
g_free (method);
}
/*
* mono_method_same_domain:
*
* Determine whenever two compiled methods are in the same domain, thus
* the address of the callee can be embedded in the caller.
*/
gboolean mono_method_same_domain (MonoJitInfo *caller, MonoJitInfo *callee)
{
MonoMethod *cmethod;
if (!caller || caller->is_trampoline || !callee || callee->is_trampoline)
return FALSE;
/*
* If the call was made from domain-neutral to domain-specific
* code, we can't patch the call site.
*/
if (caller->domain_neutral && !callee->domain_neutral)
return FALSE;
cmethod = jinfo_get_method (caller);
if ((cmethod->klass == mono_defaults.appdomain_class) &&
(strstr (cmethod->name, "InvokeInDomain"))) {
/* The InvokeInDomain methods change the current appdomain */
return FALSE;
}
return TRUE;
}
/*
* mono_global_codeman_reserve:
*
* Allocate code memory from the global code manager.
*/
void *(mono_global_codeman_reserve) (int size)
{
void *ptr;
if (mono_aot_only)
g_error ("Attempting to allocate from the global code manager while running in aot-only mode.\n");
if (!global_codeman) {
/* This can happen during startup */
global_codeman = mono_code_manager_new ();
return mono_code_manager_reserve (global_codeman, size);
}
else {
mono_jit_lock ();
ptr = mono_code_manager_reserve (global_codeman, size);
mono_jit_unlock ();
return ptr;
}
}
/* The callback shouldn't take any locks */
void
mono_global_codeman_foreach (MonoCodeManagerFunc func, void *user_data)
{
mono_jit_lock ();
mono_code_manager_foreach (global_codeman, func, user_data);
mono_jit_unlock ();
}
/**
* mono_create_unwind_op:
*
* Create an unwind op with the given parameters.
*/
MonoUnwindOp*
mono_create_unwind_op (int when, int tag, int reg, int val)
{
MonoUnwindOp *op = g_new0 (MonoUnwindOp, 1);
op->op = tag;
op->reg = reg;
op->val = val;
op->when = when;
return op;
}
MonoJumpInfoToken *
mono_jump_info_token_new2 (MonoMemPool *mp, MonoImage *image, guint32 token, MonoGenericContext *context)
{
MonoJumpInfoToken *res = (MonoJumpInfoToken *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoToken));
res->image = image;
res->token = token;
res->has_context = context != NULL;
if (context)
memcpy (&res->context, context, sizeof (MonoGenericContext));
return res;
}
MonoJumpInfoToken *
mono_jump_info_token_new (MonoMemPool *mp, MonoImage *image, guint32 token)
{
return mono_jump_info_token_new2 (mp, image, token, NULL);
}
/*
* mono_tramp_info_create:
*
* Create a MonoTrampInfo structure from the arguments. This function assumes ownership
* of JI, and UNWIND_OPS.
*/
MonoTrampInfo*
mono_tramp_info_create (const char *name, guint8 *code, guint32 code_size, MonoJumpInfo *ji, GSList *unwind_ops)
{
MonoTrampInfo *info = g_new0 (MonoTrampInfo, 1);
info->name = g_strdup (name);
info->code = code;
info->code_size = code_size;
info->ji = ji;
info->unwind_ops = unwind_ops;
return info;
}
void
mono_tramp_info_free (MonoTrampInfo *info)
{
g_free (info->name);
// FIXME: ji
mono_free_unwind_info (info->unwind_ops);
if (info->owns_uw_info)
g_free (info->uw_info);
g_free (info);
}
static void
register_trampoline_jit_info (MonoDomain *domain, MonoTrampInfo *info)
{
MonoJitInfo *ji;
ji = (MonoJitInfo *)mono_domain_alloc0 (domain, mono_jit_info_size ((MonoJitInfoFlags)0, 0, 0));
mono_jit_info_init (ji, NULL, info->code, info->code_size, (MonoJitInfoFlags)0, 0, 0);
ji->d.tramp_info = info;
ji->is_trampoline = TRUE;
ji->unwind_info = mono_cache_unwind_info (info->uw_info, info->uw_info_len);
mono_jit_info_table_add (domain, ji);
}
/*
* mono_tramp_info_register:
*
* Remember INFO for use by xdebug, mono_print_method_from_ip (), jit maps, etc.
* INFO can be NULL.
* Frees INFO.
*/
static void
mono_tramp_info_register_internal (MonoTrampInfo *info, MonoDomain *domain, gboolean aot)
{
MonoTrampInfo *copy;
if (!info)
return;
if (!domain)
domain = mono_get_root_domain ();
if (domain)
copy = mono_domain_alloc0 (domain, sizeof (MonoTrampInfo));
else
copy = g_new0 (MonoTrampInfo, 1);
copy->code = info->code;
copy->code_size = info->code_size;
copy->name = g_strdup (info->name);
if (info->unwind_ops) {
copy->uw_info = mono_unwind_ops_encode (info->unwind_ops, ©->uw_info_len);
copy->owns_uw_info = TRUE;
if (domain) {
/* Move unwind info into the domain's memory pool so that it is removed once the domain is released. */
guint8 *temp = copy->uw_info;
copy->uw_info = mono_domain_alloc (domain, copy->uw_info_len);
memcpy (copy->uw_info, temp, copy->uw_info_len);
g_free (temp);
}
} else {
/* Trampolines from aot have the unwind ops already encoded */
copy->uw_info = info->uw_info;
copy->uw_info_len = info->uw_info_len;
}
mono_save_trampoline_xdebug_info (info);
mono_lldb_save_trampoline_info (info);
#ifdef MONO_ARCH_HAVE_UNWIND_TABLE
if (!aot)
mono_arch_unwindinfo_install_tramp_unwind_info (info->unwind_ops, info->code, info->code_size);
#endif
if (!domain) {
/* If no root domain has been created yet, postpone the registration. */
mono_jit_lock ();
tramp_infos = g_slist_prepend (tramp_infos, copy);
mono_jit_unlock ();
} else if (copy->uw_info) {
/* Only register trampolines that have unwind infos */
register_trampoline_jit_info (domain, copy);
}
if (mono_jit_map_is_enabled ())
mono_emit_jit_tramp (info->code, info->code_size, info->name);
mono_tramp_info_free (info);
}
void
mono_tramp_info_register (MonoTrampInfo *info, MonoDomain *domain)
{
mono_tramp_info_register_internal (info, domain, FALSE);
}
void
mono_aot_tramp_info_register (MonoTrampInfo *info, MonoDomain *domain)
{
mono_tramp_info_register_internal (info, domain, TRUE);
}
static void
mono_tramp_info_cleanup (void)
{
GSList *l;
for (l = tramp_infos; l; l = l->next) {
MonoTrampInfo *info = (MonoTrampInfo *)l->data;
mono_tramp_info_free (info);
}
g_slist_free (tramp_infos);
}
/* Register trampolines created before the root domain was created in the jit info tables */
static void
register_trampolines (MonoDomain *domain)
{
GSList *l;
for (l = tramp_infos; l; l = l->next) {
MonoTrampInfo *info = (MonoTrampInfo *)l->data;
register_trampoline_jit_info (domain, info);
}
}
G_GNUC_UNUSED static void
break_count (void)
{
}
/*
* Runtime debugging tool, use if (debug_count ()) <x> else <y> to do <x> the first COUNT times, then do <y> afterwards.
* Set a breakpoint in break_count () to break the last time <x> is done.
*/
G_GNUC_UNUSED gboolean
mono_debug_count (void)
{
static int count = 0, int_val = 0;
static gboolean inited, has_value = FALSE;
count ++;
if (!inited) {
char *value = g_getenv ("COUNT");
if (value) {
int_val = atoi (value);
g_free (value);
has_value = TRUE;
}
inited = TRUE;
}
if (!has_value)
return TRUE;
if (count == int_val)
break_count ();
if (count > int_val)
return FALSE;
return TRUE;
}
MonoMethod*
mono_icall_get_wrapper_method (MonoJitICallInfo* callinfo)
{
/* This icall is used to check for exceptions, so don't check in the wrapper */
gboolean check_exc = (callinfo != &mono_get_jit_icall_info ()->mono_thread_interruption_checkpoint);
return mono_marshal_get_icall_wrapper (callinfo, check_exc);
}
gconstpointer
mono_icall_get_wrapper_full (MonoJitICallInfo* callinfo, gboolean do_compile)
{
ERROR_DECL (error);
MonoMethod *wrapper;
gconstpointer addr, trampoline;
MonoDomain *domain = mono_get_root_domain ();
if (callinfo->wrapper)
return callinfo->wrapper;
wrapper = mono_icall_get_wrapper_method (callinfo);
if (do_compile) {
addr = mono_compile_method_checked (wrapper, error);
mono_error_assert_ok (error);
mono_memory_barrier ();
callinfo->wrapper = addr;
return addr;
} else {
if (callinfo->trampoline)
return callinfo->trampoline;
trampoline = mono_create_jit_trampoline (domain, wrapper, error);
mono_error_assert_ok (error);
trampoline = mono_create_ftnptr (domain, (gpointer)trampoline);
mono_loader_lock ();
if (!callinfo->trampoline) {
callinfo->trampoline = trampoline;
}
mono_loader_unlock ();
return callinfo->trampoline;
}
}
gconstpointer
mono_icall_get_wrapper (MonoJitICallInfo* callinfo)
{
return mono_icall_get_wrapper_full (callinfo, FALSE);
}
static MonoJitDynamicMethodInfo*
mono_dynamic_code_hash_lookup (MonoDomain *domain, MonoMethod *method)
{
MonoJitDynamicMethodInfo *res;
if (domain_jit_info (domain)->dynamic_code_hash)
res = (MonoJitDynamicMethodInfo *)g_hash_table_lookup (domain_jit_info (domain)->dynamic_code_hash, method);
else
res = NULL;
return res;
}
#ifdef __cplusplus
template <typename T>
static void
register_opcode_emulation (int opcode, MonoJitICallInfo *jit_icall_info, const char *name, MonoMethodSignature *sig, T func, const char *symbol, gboolean no_wrapper)
#else
static void
register_opcode_emulation (int opcode, MonoJitICallInfo *jit_icall_info, const char *name, MonoMethodSignature *sig, gpointer func, const char *symbol, gboolean no_wrapper)
#endif
{
#ifndef DISABLE_JIT
mini_register_opcode_emulation (opcode, jit_icall_info, name, sig, func, symbol, no_wrapper);
#else
// FIXME ifdef in mini_register_opcode_emulation and just call it.
g_assert (!sig->hasthis);
g_assert (sig->param_count < 3);
mono_register_jit_icall_info (jit_icall_info, func, name, sig, no_wrapper, symbol);
#endif
}
#define register_opcode_emulation(opcode, name, sig, func, no_wrapper) \
(register_opcode_emulation ((opcode), &mono_get_jit_icall_info ()->name, #name, (sig), func, #func, (no_wrapper)))
/*
* For JIT icalls implemented in C.
* NAME should be the same as the name of the C function whose address is FUNC.
* If @avoid_wrapper is TRUE, no wrapper is generated. This is for perf critical icalls which
* can't throw exceptions.
*
* func is an identifier, that names a function, and is also in jit-icall-reg.h,
* and therefore a field in mono_jit_icall_info and can be token pasted into an enum value.
*
* The name of func must be linkable for AOT, for example g_free does not work (monoeg_g_free instead),
* nor does the C++ overload fmod (mono_fmod instead). These functions therefore
* must be extern "C".
*/
#define register_icall(func, sig, avoid_wrapper) \
(mono_register_jit_icall_info (&mono_get_jit_icall_info ()->func, func, #func, (sig), (avoid_wrapper), #func))
#define register_icall_no_wrapper(func, sig) register_icall (func, sig, TRUE)
#define register_icall_with_wrapper(func, sig) register_icall (func, sig, FALSE)
/*
* Register an icall where FUNC is dynamically generated or otherwise not
* possible to link to it using NAME during AOT.
*
* func is an expression, such a local variable or a function call to get a function pointer.
* name is an identifier
*
* Providing func and name separately is what distinguishes "dyn" from regular.
*
* This also passes last parameter c_symbol=NULL since there is not a directly linkable symbol.
*/
#define register_dyn_icall(func, name, sig, save) \
(mono_register_jit_icall_info (&mono_get_jit_icall_info ()->name, (func), #name, (sig), (save), NULL))
MonoLMF *
mono_get_lmf (void)
{
MonoJitTlsData *jit_tls;
if ((jit_tls = mono_tls_get_jit_tls ()))
return jit_tls->lmf;
/*
* We do not assert here because this function can be called from
* mini-gc.c on a thread that has not executed any managed code, yet
* (the thread object allocation can trigger a collection).
*/
return NULL;
}
void
mono_set_lmf (MonoLMF *lmf)
{
(*mono_get_lmf_addr ()) = lmf;
}
static void
mono_set_jit_tls (MonoJitTlsData *jit_tls)
{
MonoThreadInfo *info;
mono_tls_set_jit_tls (jit_tls);
/* Save it into MonoThreadInfo so it can be accessed by mono_thread_state_init_from_handle () */
info = mono_thread_info_current ();
if (info)
mono_thread_info_tls_set (info, TLS_KEY_JIT_TLS, jit_tls);
}
static void
mono_set_lmf_addr (MonoLMF **lmf_addr)
{
MonoThreadInfo *info;
mono_tls_set_lmf_addr (lmf_addr);
/* Save it into MonoThreadInfo so it can be accessed by mono_thread_state_init_from_handle () */
info = mono_thread_info_current ();
if (info)
mono_thread_info_tls_set (info, TLS_KEY_LMF_ADDR, lmf_addr);
}
/*
* mono_push_lmf:
*
* Push an MonoLMFExt frame on the LMF stack.
*/
void
mono_push_lmf (MonoLMFExt *ext)
{
MonoLMF **lmf_addr;
lmf_addr = mono_get_lmf_addr ();
ext->lmf.previous_lmf = *lmf_addr;
/* Mark that this is a MonoLMFExt */
ext->lmf.previous_lmf = (gpointer)(((gssize)ext->lmf.previous_lmf) | 2);
mono_set_lmf ((MonoLMF*)ext);
}
/*
* mono_pop_lmf:
*
* Pop the last frame from the LMF stack.
*/
void
mono_pop_lmf (MonoLMF *lmf)
{
mono_set_lmf ((MonoLMF *)(((gssize)lmf->previous_lmf) & ~3));
}
/*
* mono_jit_thread_attach:
*
* Called by Xamarin.Mac and other products. Attach thread to runtime if
* needed and switch to @domain.
*
* This function is external only and @deprecated don't use it. Use mono_threads_attach_coop ().
*
* If the thread is newly-attached, put into GC Safe mode.
*
* @return the original domain which needs to be restored, or NULL.
*/
MonoDomain*
mono_jit_thread_attach (MonoDomain *domain)
{
MonoDomain *orig;
gboolean attached;
if (!domain) {
/* Happens when called from AOTed code which is only used in the root domain. */
domain = mono_get_root_domain ();
}
g_assert (domain);
attached = mono_tls_get_jit_tls () != NULL;
if (!attached) {
mono_thread_attach (domain);
// #678164
mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
/* mono_jit_thread_attach is external-only and not called by
* the runtime on any of our own threads. So if we get here,
* the thread is running native code - leave it in GC Safe mode
* and leave it to the n2m invoke wrappers or MONO_API entry
* points to switch to GC Unsafe.
*/
MONO_STACKDATA (stackdata);
mono_threads_enter_gc_safe_region_unbalanced_internal (&stackdata);
}
orig = mono_domain_get ();
if (orig != domain)
mono_domain_set_fast (domain, TRUE);
return orig != domain ? orig : NULL;
}
/*
* mono_jit_set_domain:
*
* Set domain to @domain if @domain is not null
*/
void
mono_jit_set_domain (MonoDomain *domain)
{
g_assert (!mono_threads_is_blocking_transition_enabled ());
if (domain)
mono_domain_set_fast (domain, TRUE);
}
/**
* mono_thread_abort:
* \param obj exception object
* Abort the thread, print exception information and stack trace
*/
static void
mono_thread_abort (MonoObject *obj)
{
/* MonoJitTlsData *jit_tls = mono_tls_get_jit_tls (); */
/* handle_remove should be eventually called for this thread, too
g_free (jit_tls);*/
if ((mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_LEGACY) ||
(obj->vtable->klass == mono_defaults.threadabortexception_class) ||
((obj->vtable->klass) == mono_class_try_get_appdomain_unloaded_exception_class () &&
mono_thread_info_current ()->runtime_thread)) {
mono_thread_exit ();
} else {
mono_invoke_unhandled_exception_hook (obj);
}
}
static MonoJitTlsData*
setup_jit_tls_data (gpointer stack_start, MonoAbortFunction abort_func)
{
MonoJitTlsData *jit_tls;
MonoLMF *lmf;
jit_tls = mono_tls_get_jit_tls ();
if (jit_tls)
return jit_tls;
jit_tls = g_new0 (MonoJitTlsData, 1);
jit_tls->abort_func = abort_func;
jit_tls->end_of_stack = stack_start;
mono_set_jit_tls (jit_tls);
lmf = g_new0 (MonoLMF, 1);
MONO_ARCH_INIT_TOP_LMF_ENTRY (lmf);
jit_tls->first_lmf = lmf;
mono_set_lmf_addr (&jit_tls->lmf);
jit_tls->lmf = lmf;
#ifdef MONO_ARCH_HAVE_TLS_INIT
mono_arch_tls_init ();
#endif
mono_setup_altstack (jit_tls);
return jit_tls;
}
static void
free_jit_tls_data (MonoJitTlsData *jit_tls)
{
//This happens during AOT cuz the thread is never attached
if (!jit_tls)
return;
mono_arch_free_jit_tls_data (jit_tls);
mono_free_altstack (jit_tls);
g_free (jit_tls->first_lmf);
g_free (jit_tls->interp_context);
g_free (jit_tls);
}
static void
mono_thread_start_cb (intptr_t tid, gpointer stack_start, gpointer func)
{
MonoThreadInfo *thread;
MonoJitTlsData *jit_tls = setup_jit_tls_data (stack_start, mono_thread_abort);
thread = mono_thread_info_current_unchecked ();
if (thread)
thread->jit_data = jit_tls;
mono_arch_cpu_init ();
}
void (*mono_thread_attach_aborted_cb ) (MonoObject *obj) = NULL;
static void
mono_thread_abort_dummy (MonoObject *obj)
{
if (mono_thread_attach_aborted_cb)
mono_thread_attach_aborted_cb (obj);
else
mono_thread_abort (obj);
}
static void
mono_thread_attach_cb (intptr_t tid, gpointer stack_start)
{
MonoThreadInfo *thread;
MonoJitTlsData *jit_tls = setup_jit_tls_data (stack_start, mono_thread_abort_dummy);
thread = mono_thread_info_current_unchecked ();
if (thread)
thread->jit_data = jit_tls;
mono_arch_cpu_init ();
}
static void
mini_thread_cleanup (MonoNativeThreadId tid)
{
MonoJitTlsData *jit_tls = NULL;
MonoThreadInfo *info;
info = mono_thread_info_current_unchecked ();
/* We can't clean up tls information if we are on another thread, it will clean up the wrong stuff
* It would be nice to issue a warning when this happens outside of the shutdown sequence. but it's
* not a trivial thing.