#include <mono/metadata/tabledefs.h>
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/mono-debug-debugger.h>
-#include <mono/metadata/monitor.h>
#include <mono/metadata/profiler-private.h>
-#include <mono/metadata/gc-internal.h>
+#include <mono/metadata/gc-internals.h>
#include <mono/arch/x86/x86-codegen.h>
#include <mono/utils/memcheck.h>
#include "mini.h"
#include "mini-x86.h"
+#include "debugger-agent.h"
#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
guint8 *code, *start;
int this_pos = 4, size = NACL_SIZE(16, 32);
MonoDomain *domain = mono_domain_get ();
+ GSList *unwind_ops;
start = code = mono_domain_code_reserve (domain, size);
+ unwind_ops = mono_arch_get_cie_program ();
+
x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
x86_jump_code (code, addr);
g_assert ((code - start) < size);
nacl_domain_code_validate (domain, &start, size, &code);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m);
+ mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
+
return start;
}
{
guint8 *code, *start;
int buf_len;
+ GSList *unwind_ops;
MonoDomain *domain = mono_domain_get ();
start = code = mono_domain_code_reserve (domain, buf_len);
+ unwind_ops = mono_arch_get_cie_program ();
+
x86_mov_reg_imm (code, MONO_ARCH_RGCTX_REG, mrgctx);
x86_jump_code (code, addr);
g_assert ((code - start) <= buf_len);
mono_arch_flush_icache (start, code - start);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL);
- return start;
-}
-
-gpointer
-mono_arch_get_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
-{
- guint8 *code, *start;
- int buf_len;
- int this_offset;
-
- buf_len = 32;
-
- start = code = mono_domain_code_reserve (domain, buf_len);
-
- this_offset = mono_x86_get_this_arg_offset (NULL, mono_method_signature (m));
-
- /* Set imt arg */
- x86_mov_reg_imm (code, MONO_ARCH_IMT_REG, m);
- /* Load this */
- x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_offset + 4, 4);
- /* Load vtable address */
- x86_mov_reg_membase (code, X86_EAX, X86_EAX, 0, 4);
- x86_jump_membase (code, X86_EAX, vt_offset);
-
- g_assert ((code - start) < buf_len);
-
- nacl_domain_code_validate (domain, &start, buf_len, &code);
-
- mono_arch_flush_icache (start, code - start);
- mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_IMT_TRAMPOLINE, NULL);
+ mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
return start;
}
return (gpointer*)((char*)vt + displacement);
}
-void
-mono_arch_nullify_class_init_trampoline (guint8 *code, mgreg_t *regs)
-{
- guint8 buf [16];
- gboolean can_write = mono_breakpoint_clean_code (NULL, code, 6, buf, sizeof (buf));
- gpointer tramp = mini_get_nullified_class_init_trampoline ();
-
- if (!can_write)
- return;
-
- code -= 5;
- if (code [0] == 0xe8) {
-#if defined(__default_codegen__)
- if (!mono_running_on_valgrind ()) {
- guint32 ops;
- /*
- * Thread safe code patching using the algorithm from the paper
- * 'Practicing JUDO: Java Under Dynamic Optimizations'
- */
- /*
- * First atomically change the the first 2 bytes of the call to a
- * spinning jump.
- */
- ops = 0xfeeb;
- InterlockedExchange ((gint32*)code, ops);
-
- /* Then change the other bytes to a nop */
- code [2] = 0x90;
- code [3] = 0x90;
- code [4] = 0x90;
-
- /* Then atomically change the first 4 bytes to a nop as well */
- ops = 0x90909090;
- InterlockedExchange ((gint32*)code, ops);
- /* FIXME: the calltree skin trips on the self modifying code above */
-
- /* Tell valgrind to recompile the patched code */
- //VALGRIND_DISCARD_TRANSLATIONS (code, 8);
- }
-#elif defined(__native_client_codegen__)
- mono_arch_patch_callsite (code, code + 5, tramp);
-#endif
- } else if (code [0] == 0x90 || code [0] == 0xeb) {
- /* Already changed by another thread */
- ;
- } else if ((code [-1] == 0xff) && (x86_modrm_reg (code [0]) == 0x2)) {
- /* call *<OFFSET>(<REG>) -> Call made from AOT code */
- gpointer *vtable_slot;
-
- vtable_slot = get_vcall_slot_addr (code + 5, regs);
- g_assert (vtable_slot);
-
- *vtable_slot = tramp;
- } else {
- printf ("Invalid trampoline sequence: %x %x %x %x %x %x %x\n", code [0], code [1], code [2], code [3],
- code [4], code [5], code [6]);
- g_assert_not_reached ();
- }
-}
-
guchar*
mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
{
GSList *unwind_ops = NULL;
MonoJumpInfo *ji = NULL;
int i, offset, frame_size, regarray_offset, lmf_offset, caller_ip_offset, arg_offset;
-
- unwind_ops = mono_arch_get_cie_program ();
+ int cfa_offset; /* cfa = cfa_reg + cfa_offset */
code = buf = mono_global_codeman_reserve (256);
* the ret address is at: esp + (pushed_args + 1) * sizeof (gpointer)
*/
- // FIXME: Unwind info
-
/* Compute frame offsets relative to the frame pointer %ebp */
arg_offset = sizeof (mgreg_t);
caller_ip_offset = 2 * sizeof (mgreg_t);
offset += 4 * sizeof (mgreg_t);
frame_size = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
+ /* ret addr and arg are on the stack */
+ cfa_offset = 2 * sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, cfa_offset);
+ // IP saved at CFA - 4
+ mono_add_unwind_op_offset (unwind_ops, code, buf, X86_NREG, -4);
+
/* Allocate frame */
x86_push_reg (code, X86_EBP);
+ cfa_offset += sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
+ mono_add_unwind_op_offset (unwind_ops, code, buf, X86_EBP, -cfa_offset);
+
x86_mov_reg_reg (code, X86_EBP, X86_ESP, sizeof (mgreg_t));
+ mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, X86_EBP);
+
/* There are three words on the stack, adding + 4 aligns the stack to 16, which is needed on osx */
x86_alu_reg_imm (code, X86_SUB, X86_ESP, frame_size + sizeof (mgreg_t));
x86_mov_membase_reg (code, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), X86_EAX, sizeof (mgreg_t));
/* lmf->previous_lmf = *(lmf_addr) */
x86_mov_reg_membase (code, X86_ECX, X86_EAX, 0, sizeof (mgreg_t));
- /* Signal to mono_arch_find_jit_info () that this is a trampoline frame */
+ /* Signal to mono_arch_unwind_frame () that this is a trampoline frame */
x86_alu_reg_imm (code, X86_ADD, X86_ECX, 1);
x86_mov_membase_reg (code, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), X86_ECX, sizeof (mgreg_t));
/* *lmf_addr = lmf */
/* Restore frame */
x86_leave (code);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, cfa_offset);
+ mono_add_unwind_op_same_value (unwind_ops, code, buf, X86_EBP);
if (MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type)) {
/* Load the value returned by the trampoline */
x86_mov_reg_membase (code, X86_EAX, X86_ESP, 0, 4);
/* The trampoline returns normally, pop the trampoline argument */
x86_alu_reg_imm (code, X86_ADD, X86_ESP, 4);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
x86_ret (code);
} else {
/* The trampoline argument is at the top of the stack, and it contains the address we need to branch to */
if (tramp_type == MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) {
x86_pop_reg (code, X86_EAX);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
x86_alu_reg_imm (code, X86_ADD, X86_ESP, 0x8);
x86_jump_reg (code, X86_EAX);
} else {
g_assert ((code - buf) <= 256);
mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
- if (info) {
- tramp_name = mono_get_generic_trampoline_name (tramp_type);
- *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
- g_free (tramp_name);
- }
-
- return buf;
-}
-
-gpointer
-mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
-{
- guint8 *code, *buf;
- int tramp_size = NACL_SIZE (16, kNaClAlignment);
-
- code = buf = mono_global_codeman_reserve (tramp_size);
- x86_ret (code);
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
-
- mono_arch_flush_icache (buf, code - buf);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
-
- if (info)
- *info = mono_tramp_info_create ("nullified_class_init_trampoline", buf, code - buf, NULL, NULL);
+ tramp_name = mono_get_generic_trampoline_name (tramp_type);
+ *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
+ g_free (tramp_name);
return buf;
}
g_assert (code - buf <= tramp_size);
- if (info) {
- char *name = mono_get_rgctx_fetch_trampoline_name (slot);
- *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
- g_free (name);
- }
+ char *name = mono_get_rgctx_fetch_trampoline_name (slot);
+ *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
+ g_free (name);
return buf;
}
g_assert (code - buf <= tramp_size);
- if (info)
- *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
return buf;
}
-gpointer
-mono_arch_create_generic_class_init_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- guint8 *tramp;
- guint8 *code, *buf;
- static int byte_offset = -1;
- static guint8 bitmask;
- guint8 *jump;
- int tramp_size;
- GSList *unwind_ops = NULL;
- MonoJumpInfo *ji = NULL;
-
- tramp_size = 64;
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- unwind_ops = mono_arch_get_cie_program ();
-
- if (byte_offset < 0)
- mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask);
-
- x86_test_membase_imm (code, MONO_ARCH_VTABLE_REG, byte_offset, bitmask);
- jump = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- x86_ret (code);
-
- x86_patch (jump, code);
-
- /* Push the vtable so the stack is the same as in a specific trampoline */
- x86_push_reg (code, MONO_ARCH_VTABLE_REG);
-
- if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_generic_class_init");
- x86_jump_reg (code, X86_EAX);
- } else {
- tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
-
- /* jump to the actual trampoline */
- x86_jump_code (code, tramp);
- }
-
- mono_arch_flush_icache (code, code - buf);
-
- g_assert (code - buf <= tramp_size);
-#ifdef __native_client_codegen__
- g_assert (code - buf <= kNaClAlignment);
-#endif
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
-
- if (info)
- *info = mono_tramp_info_create ("generic_class_init_trampoline", buf, code - buf, ji, unwind_ops);
-
- return buf;
-}
-
-#ifdef MONO_ARCH_MONITOR_OBJECT_REG
-/*
- * The code produced by this trampoline is equivalent to this:
- *
- * if (obj) {
- * if (obj->synchronisation) {
- * if (obj->synchronisation->owner == 0) {
- * if (cmpxch (&obj->synchronisation->owner, TID, 0) == 0)
- * return;
- * }
- * if (obj->synchronisation->owner == TID) {
- * ++obj->synchronisation->nest;
- * return;
- * }
- * }
- * }
- * return full_monitor_enter ();
- *
- */
-gpointer
-mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot)
-{
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_sync_null, *jump_other_owner, *jump_cmpxchg_failed, *jump_tid, *jump_sync_thin_hash = NULL;
- guint8 *jump_lock_taken_true = NULL;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
-
- g_assert (MONO_ARCH_MONITOR_OBJECT_REG == X86_EAX);
-#ifdef MONO_ARCH_MONITOR_LOCK_TAKEN_REG
- g_assert (MONO_ARCH_MONITOR_LOCK_TAKEN_REG == X86_EDX);
-#else
- g_assert (!is_v4);
-#endif
-
- mono_monitor_threads_sync_members_offset (&status_offset, &nest_offset);
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (status_offset) == sizeof (guint32));
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32));
- status_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (status_offset);
- nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
-
- tramp_size = NACL_SIZE (128, 192);
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- x86_push_reg (code, X86_EAX);
- if (mono_thread_get_tls_offset () != -1) {
- if (is_v4) {
- x86_test_membase_imm (code, X86_EDX, 0, 1);
- /* if *lock_taken is 1, jump to actual trampoline */
- jump_lock_taken_true = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- x86_push_reg (code, X86_EDX);
- }
- /* MonoObject* obj is in EAX */
- /* is obj null? */
- x86_test_reg_reg (code, X86_EAX, X86_EAX);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load obj->synchronization to ECX */
- x86_mov_reg_membase (code, X86_ECX, X86_EAX, MONO_STRUCT_OFFSET (MonoObject, synchronisation), 4);
-
- if (mono_gc_is_moving ()) {
- /*if bit zero is set it's a thin hash*/
- /*FIXME use testb encoding*/
- x86_test_reg_imm (code, X86_ECX, 0x01);
- jump_sync_thin_hash = code;
- x86_branch8 (code, X86_CC_NE, -1, 1);
-
- /*clear bits used by the gc*/
- x86_alu_reg_imm (code, X86_AND, X86_ECX, ~0x3);
- }
-
- /* is synchronization null? */
- x86_test_reg_reg (code, X86_ECX, X86_ECX);
-
- /* if yes, jump to actual trampoline */
- jump_sync_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load MonoInternalThread* into EDX */
- if (aot) {
- /* load_aotconst () puts the result into EAX */
- x86_mov_reg_reg (code, X86_EDX, X86_EAX, sizeof (mgreg_t));
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_TLS_OFFSET, GINT_TO_POINTER (TLS_KEY_THREAD));
- code = mono_x86_emit_tls_get_reg (code, X86_EAX, X86_EAX);
- x86_xchg_reg_reg (code, X86_EAX, X86_EDX, sizeof (mgreg_t));
- } else {
- code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
- }
- /* load TID into EDX */
- x86_mov_reg_membase (code, X86_EDX, X86_EDX, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
-
- /* is synchronization->owner free */
- x86_mov_reg_membase (code, X86_EAX, X86_ECX, status_offset, 4);
- x86_test_reg_imm (code, X86_EAX, OWNER_MASK);
- /* if not, jump to next case */
- jump_tid = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* if yes, try a compare-exchange with the TID */
- /* Form new status */
- x86_alu_reg_reg (code, X86_OR, X86_EDX, X86_EAX);
- /* compare and exchange */
- x86_prefix (code, X86_LOCK_PREFIX);
- x86_cmpxchg_membase_reg (code, X86_ECX, status_offset, X86_EDX);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if successful, pop and return */
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_mov_membase_imm (code, X86_EDX, 0, 1, 1);
- }
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* next case: synchronization->owner is not null */
- x86_patch (jump_tid, code);
- /* is synchronization->owner == TID? */
- x86_alu_reg_imm (code, X86_AND, X86_EAX, OWNER_MASK);
- x86_alu_reg_reg (code, X86_CMP, X86_EAX, X86_EDX);
- /* if not, jump to actual trampoline */
- jump_other_owner = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, increment nest */
- x86_inc_membase (code, X86_ECX, nest_offset);
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_mov_membase_imm (code, X86_EDX, 0, 1, 1);
- }
- x86_pop_reg (code, X86_EAX);
- /* return */
- x86_ret (code);
-
- /* obj is pushed, jump to the actual trampoline */
- x86_patch (jump_obj_null, code);
- if (jump_sync_thin_hash)
- x86_patch (jump_sync_thin_hash, code);
- x86_patch (jump_sync_null, code);
- x86_patch (jump_other_owner, code);
- x86_patch (jump_cmpxchg_failed, code);
-
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_patch (jump_lock_taken_true, code);
- }
- }
-
- if (aot) {
- /* We are calling the generic trampoline directly, the argument is pushed
- * on the stack just like a specific trampoline.
- */
- if (is_v4)
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_enter_v4");
- else
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_enter");
- x86_jump_reg (code, X86_EAX);
- } else {
- if (is_v4)
- x86_jump_code (code, mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER_V4));
- else
- x86_jump_code (code, mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER));
- }
-
- mono_arch_flush_icache (buf, code - buf);
- g_assert (code - buf <= tramp_size);
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
-
- if (info) {
- if (is_v4)
- *info = mono_tramp_info_create ("monitor_enter_v4_trampoline", buf, code - buf, ji, unwind_ops);
- else
- *info = mono_tramp_info_create ("monitor_enter_trampoline", buf, code - buf, ji, unwind_ops);
- }
-
- return buf;
-}
-
-gpointer
-mono_arch_create_monitor_exit_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- guint8 *tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_sync_thin_hash = NULL;
- guint8 *jump_next, *jump_cmpxchg_failed;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
-
- g_assert (MONO_ARCH_MONITOR_OBJECT_REG == X86_EAX);
-
- mono_monitor_threads_sync_members_offset (&status_offset, &nest_offset);
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (status_offset) == sizeof (guint32));
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32));
- status_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (status_offset);
- nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
-
- tramp_size = NACL_SIZE (128, 192);
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- x86_push_reg (code, X86_EAX);
- if (mono_thread_get_tls_offset () != -1) {
- /* MonoObject* obj is in EAX */
- /* is obj null? */
- x86_test_reg_reg (code, X86_EAX, X86_EAX);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load obj->synchronization to ECX */
- x86_mov_reg_membase (code, X86_ECX, X86_EAX, MONO_STRUCT_OFFSET (MonoObject, synchronisation), 4);
-
- if (mono_gc_is_moving ()) {
- /*if bit zero is set it's a thin hash*/
- /*FIXME use testb encoding*/
- x86_test_reg_imm (code, X86_ECX, 0x01);
- jump_sync_thin_hash = code;
- x86_branch8 (code, X86_CC_NE, -1, 1);
-
- /*clear bits used by the gc*/
- x86_alu_reg_imm (code, X86_AND, X86_ECX, ~0x3);
- }
-
- /* is synchronization null? */
- x86_test_reg_reg (code, X86_ECX, X86_ECX);
- /* if yes, jump to actual trampoline */
- jump_sync_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* next case: synchronization is not null */
- /* load MonoInternalThread* into EDX */
- if (aot) {
- /* load_aotconst () puts the result into EAX */
- x86_mov_reg_reg (code, X86_EDX, X86_EAX, sizeof (mgreg_t));
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_TLS_OFFSET, GINT_TO_POINTER (TLS_KEY_THREAD));
- code = mono_x86_emit_tls_get_reg (code, X86_EAX, X86_EAX);
- x86_xchg_reg_reg (code, X86_EAX, X86_EDX, sizeof (mgreg_t));
- } else {
- code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
- }
- /* load TID into EDX */
- x86_mov_reg_membase (code, X86_EDX, X86_EDX, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
- /* is synchronization->owner == TID */
- x86_mov_reg_membase (code, X86_EAX, X86_ECX, status_offset, 4);
- x86_alu_reg_reg (code, X86_XOR, X86_EDX, X86_EAX);
- x86_test_reg_imm (code, X86_EDX, OWNER_MASK);
- /* if no, jump to actual trampoline */
- jump_not_owned = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* next case: synchronization->owner == TID */
- /* is synchronization->nest == 1 */
- x86_alu_membase_imm (code, X86_CMP, X86_ECX, nest_offset, 1);
- /* if not, jump to next case */
- jump_next = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, is synchronization->entry_count greater than zero? */
- x86_test_reg_imm (code, X86_EAX, ENTRY_COUNT_WAITERS);
- /* if yes, jump to actual trampoline */
- jump_have_waiters = code;
- x86_branch8 (code, X86_CC_NZ, -1 , 1);
- /* if not, try to set synchronization->owner to null and return */
- x86_mov_reg_reg (code, X86_EDX, X86_EAX, 4);
- x86_alu_reg_imm (code, X86_AND, X86_EDX, ENTRY_COUNT_MASK);
- /* compare and exchange */
- x86_prefix (code, X86_LOCK_PREFIX);
- /* EAX contains the previous status */
- x86_cmpxchg_membase_reg (code, X86_ECX, status_offset, X86_EDX);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* next case: synchronization->nest is not 1 */
- x86_patch (jump_next, code);
- /* decrease synchronization->nest and return */
- x86_dec_membase (code, X86_ECX, nest_offset);
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* push obj and jump to the actual trampoline */
- x86_patch (jump_obj_null, code);
- if (jump_sync_thin_hash)
- x86_patch (jump_sync_thin_hash, code);
- x86_patch (jump_have_waiters, code);
- x86_patch (jump_cmpxchg_failed, code);
- x86_patch (jump_not_owned, code);
- x86_patch (jump_sync_null, code);
- }
-
- /* obj is pushed, jump to the actual trampoline */
- if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_exit");
- x86_jump_reg (code, X86_EAX);
- } else {
- x86_jump_code (code, tramp);
- }
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
-
- mono_arch_flush_icache (buf, code - buf);
- g_assert (code - buf <= tramp_size);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
-
- if (info)
- *info = mono_tramp_info_create ("monitor_exit_trampoline", buf, code - buf, ji, unwind_ops);
-
- return buf;
-}
-
-#else
-
-gpointer
-mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot)
-{
- g_assert_not_reached ();
- return NULL;
-}
-
-gpointer
-mono_arch_create_monitor_exit_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- g_assert_not_reached ();
- return NULL;
-}
-
-#endif
-
void
mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg)
{
guint8 *code, *buf;
int tramp_size = 64;
MonoJumpInfo *ji = NULL;
+ int cfa_offset;
GSList *unwind_ops = NULL;
g_assert (!aot);
code = buf = mono_global_codeman_reserve (tramp_size);
+ unwind_ops = mono_arch_get_cie_program ();
+ cfa_offset = sizeof (mgreg_t);
/*
This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
*/
/* Simulate a call */
/*Fix stack alignment*/
x86_alu_reg_imm (code, X86_SUB, X86_ESP, 0x4);
+ cfa_offset += sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
+
/* This is the address the trampoline will return to */
x86_push_reg (code, X86_EAX);
+ cfa_offset += sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
+
/* Dummy trampoline argument, since we call the generic trampoline directly */
x86_push_imm (code, 0);
+ cfa_offset += sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
x86_jump_code (code, tramp);
nacl_global_codeman_validate (&buf, tramp_size, &code);
mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
g_assert (code - buf <= tramp_size);
- if (info)
- *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
return buf;
}
{
guint8 *code, *start;
int buf_len;
+ GSList *unwind_ops;
+
buf_len = 10;
start = code = mono_domain_code_reserve (domain, buf_len);
+ unwind_ops = mono_arch_get_cie_program ();
+
x86_mov_reg_imm (code, X86_EAX, arg);
x86_jump_code (code, addr);
g_assert ((code - start) <= buf_len);
mono_arch_flush_icache (start, code - start);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL);
+ mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
+
return start;
}
+/*
+ * mono_arch_create_sdb_trampoline:
+ *
+ * Return a trampoline which captures the current context, passes it to
+ * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
+ * then restores the (potentially changed) context.
+ */
+guint8*
+mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
+{
+ int tramp_size = 256;
+ int framesize, ctx_offset, cfa_offset;
+ guint8 *code, *buf;
+ GSList *unwind_ops = NULL;
+ MonoJumpInfo *ji = NULL;
+
+ code = buf = mono_global_codeman_reserve (tramp_size);
+
+ framesize = 0;
+
+ /* Argument area */
+ framesize += sizeof (mgreg_t);
+
+ framesize = ALIGN_TO (framesize, 8);
+ ctx_offset = framesize;
+ framesize += sizeof (MonoContext);
+
+ framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
+
+ // CFA = sp + 4
+ cfa_offset = 4;
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, 4);
+ // IP saved at CFA - 4
+ mono_add_unwind_op_offset (unwind_ops, code, buf, X86_NREG, -cfa_offset);
+
+ x86_push_reg (code, X86_EBP);
+ cfa_offset += sizeof(mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
+ mono_add_unwind_op_offset (unwind_ops, code, buf, X86_EBP, - cfa_offset);
+
+ x86_mov_reg_reg (code, X86_EBP, X86_ESP, sizeof(mgreg_t));
+ mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, X86_EBP);
+ /* The + 8 makes the stack aligned */
+ x86_alu_reg_imm (code, X86_SUB, X86_ESP, framesize + 8);
+
+ /* Initialize a MonoContext structure on the stack */
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eax), X86_EAX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebx), X86_EBX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ecx), X86_ECX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edx), X86_EDX, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_EBP, 0, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebp), X86_EAX, sizeof (mgreg_t));
+ x86_mov_reg_reg (code, X86_EAX, X86_EBP, sizeof (mgreg_t));
+ x86_alu_reg_imm (code, X86_ADD, X86_EAX, cfa_offset);
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esp), X86_ESP, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esi), X86_ESI, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edi), X86_EDI, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_EBP, 4, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eip), X86_EAX, sizeof (mgreg_t));
+
+ /* Call the single step/breakpoint function in sdb */
+ x86_lea_membase (code, X86_EAX, X86_ESP, ctx_offset);
+ x86_mov_membase_reg (code, X86_ESP, 0, X86_EAX, sizeof (mgreg_t));
+
+ if (aot) {
+ x86_breakpoint (code);
+ } else {
+ if (single_step)
+ x86_call_code (code, debugger_agent_single_step_from_context);
+ else
+ x86_call_code (code, debugger_agent_breakpoint_from_context);
+ }
+
+ /* Restore registers from ctx */
+ /* Overwrite the saved ebp */
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebp), sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_EBP, 0, X86_EAX, sizeof (mgreg_t));
+ /* Overwrite saved eip */
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eip), sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_EBP, 4, X86_EAX, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eax), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EBX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_ECX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ecx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EDX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_ESI, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esi), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EDI, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edi), sizeof (mgreg_t));
+
+ x86_leave (code);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, cfa_offset);
+ x86_ret (code);
+
+ mono_arch_flush_icache (code, code - buf);
+ g_assert (code - buf <= tramp_size);
+
+ const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
+ *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
+
+ return buf;
+}
+
#if defined(ENABLE_GSHAREDVT)
#include "../../../mono-extensions/mono/mini/tramp-x86-gsharedvt.c"
gpointer
mono_arch_get_gsharedvt_trampoline (MonoTrampInfo **info, gboolean aot)
{
- if (info)
- *info = NULL;
+ *info = NULL;
return NULL;
}
projects / mono.git / blobdiff