#include "mini.h"
#include "mini-amd64.h"
+#include "tasklets.h"
+#include "debug-mini.h"
#define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
ctx.rcx = rcx;
ctx.rdx = rdx;
- if (!rethrow && mono_debugger_throw_exception ((gpointer)(rip - 8), (gpointer)rsp, exc)) {
- /*
- * The debugger wants us to stop on the `throw' instruction.
- * By the time we get here, it already inserted a breakpoint on
- * eip - 8 (which is the address of the `mov %r15,%rdi ; callq throw').
- */
-
- /* FIXME FIXME
- *
- * In case of a rethrow, the JIT is emitting code like this:
- *
- * mov 0xffffffffffffffd0(%rbp),%rax'
- * mov %rax,%rdi
- * callq throw
- *
- * Here, restore_context() wouldn't restore the %rax register correctly.
- */
- ctx.rip = rip - 8;
- ctx.rsp = rsp + 8;
- restore_context (&ctx);
- g_assert_not_reached ();
- }
-
- /* adjust eip so that it point into the call instruction */
- ctx.rip -= 1;
-
if (mono_object_isinst (exc, mono_defaults.exception_class)) {
MonoException *mono_ex = (MonoException*)exc;
if (!rethrow)
mono_ex->stack_trace = NULL;
}
+
+ if (mono_debug_using_mono_debugger ()) {
+ guint8 buf [16], *code;
+
+ mono_breakpoint_clean_code (NULL, (gpointer)rip, 8, buf, sizeof (buf));
+ code = buf + 8;
+
+ if (buf [3] == 0xe8) {
+ MonoContext ctx_cp = ctx;
+ ctx_cp.rip = rip - 5;
+
+ if (mono_debugger_handle_exception (&ctx_cp, exc)) {
+ restore_context (&ctx_cp);
+ g_assert_not_reached ();
+ }
+ }
+ }
+
+ /* adjust eip so that it point into the call instruction */
+ ctx.rip -= 1;
+
mono_handle_exception (&ctx, exc, (gpointer)rip, FALSE);
restore_context (&ctx);
*lmf = (gpointer)(((guint64)(*lmf)->previous_lmf) & ~1);
}
+#ifndef MONO_AMD64_NO_PUSHES
/* Pop arguments off the stack */
{
MonoJitArgumentInfo *arg_info = g_newa (MonoJitArgumentInfo, mono_method_signature (ji->method)->param_count + 1);
guint32 stack_to_pop = mono_arch_get_argument_info (mono_method_signature (ji->method), mono_method_signature (ji->method)->param_count, arg_info);
new_ctx->rsp += stack_to_pop;
}
+#endif
return ji;
} else if (*lmf) {
mono_arch_sigctx_to_monoctx (sigctx, &mctx);
+ if (mono_debugger_handle_exception (&mctx, (MonoObject *)obj))
+ return TRUE;
+
mono_handle_exception (&mctx, obj, MONO_CONTEXT_GET_IP (&mctx), test_only);
mono_arch_monoctx_to_sigctx (&mctx, sigctx);
restore_context = mono_get_restore_context ();
mono_arch_sigctx_to_monoctx (sigctx, &mctx);
+
+ if (mono_debugger_handle_exception (&mctx, (MonoObject *)obj)) {
+ if (stack_ovf)
+ prepare_for_guard_pages (&mctx);
+ restore_context (&mctx);
+ }
+
mono_handle_exception (&mctx, obj, MONO_CONTEXT_GET_IP (&mctx), FALSE);
if (stack_ovf)
prepare_for_guard_pages (&mctx);
#endif
}
-static guint64
-get_original_ip (void)
+guint64
+mono_amd64_get_original_ip (void)
{
MonoLMF *lmf = mono_get_lmf ();
return lmf->rip;
}
-static gpointer
-get_throw_pending_exception (void)
+gpointer
+mono_arch_get_throw_pending_exception_full (guint32 *code_size, MonoJumpInfo **ji, gboolean aot)
{
- static guint8* start;
- static gboolean inited = FALSE;
- guint8 *code;
+ guint8 *code, *start;
guint8 *br[1];
gpointer throw_trampoline;
- if (inited)
- return start;
+ *ji = NULL;
start = code = mono_global_codeman_reserve (128);
amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
/* Obtain the pending exception */
- amd64_mov_reg_imm (code, AMD64_R11, mono_thread_get_and_clear_pending_exception);
+ if (aot) {
+ *ji = mono_patch_info_list_prepend (*ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_get_and_clear_pending_exception");
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
+ } else {
+ amd64_mov_reg_imm (code, AMD64_R11, mono_thread_get_and_clear_pending_exception);
+ }
amd64_call_reg (code, AMD64_R11);
/* Check if it is NULL, and branch */
amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
/* Obtain the original ip and clear the flag in previous_lmf */
- amd64_mov_reg_imm (code, AMD64_R11, get_original_ip);
+ if (aot) {
+ *ji = mono_patch_info_list_prepend (*ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_get_original_ip");
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
+ } else {
+ amd64_mov_reg_imm (code, AMD64_R11, mono_amd64_get_original_ip);
+ }
amd64_call_reg (code, AMD64_R11);
/* Load exc */
amd64_push_reg (code, AMD64_RAX);
/* Call the throw trampoline */
- throw_trampoline = mono_get_throw_exception ();
- amd64_mov_reg_imm (code, AMD64_R11, throw_trampoline);
+ if (aot) {
+ *ji = mono_patch_info_list_prepend (*ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_throw_exception");
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
+ } else {
+ throw_trampoline = mono_get_throw_exception ();
+ amd64_mov_reg_imm (code, AMD64_R11, throw_trampoline);
+ }
/* We use a jump instead of a call so we can push the original ip on the stack */
amd64_jump_reg (code, AMD64_R11);
mono_amd64_patch (br [0], code);
/* Obtain the original ip and clear the flag in previous_lmf */
- amd64_mov_reg_imm (code, AMD64_R11, get_original_ip);
+ if (aot) {
+ *ji = mono_patch_info_list_prepend (*ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_get_original_ip");
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
+ } else {
+ amd64_mov_reg_imm (code, AMD64_R11, mono_amd64_get_original_ip);
+ }
amd64_call_reg (code, AMD64_R11);
amd64_mov_reg_reg (code, AMD64_R11, AMD64_RAX, 8);
g_assert ((code - start) < 128);
- inited = TRUE;
+ *code_size = code - start;
return start;
}
+static gpointer throw_pending_exception;
+
/*
* Called when a thread receives an async exception while executing unmanaged code.
* Instead of checking for this exception in the managed-to-native wrapper, we hijack
/* Signal that lmf->rip is set */
lmf->previous_lmf = (gpointer)((guint64)lmf->previous_lmf | 1);
- *(gpointer*)(lmf->rsp - 8) = get_throw_pending_exception ();
+ *(gpointer*)(lmf->rsp - 8) = throw_pending_exception;
}
void
mono_arch_exceptions_init (void)
{
- /* Call this to avoid initialization races */
- get_throw_pending_exception ();
+ guint32 code_size;
+ MonoJumpInfo *ji;
+
+ if (mono_aot_only) {
+ throw_pending_exception = mono_aot_get_named_code ("throw_pending_exception");
+ } else {
+ /* Call this to avoid initialization races */
+ throw_pending_exception = mono_arch_get_throw_pending_exception_full (&code_size, &ji, FALSE);
+ }
}
#ifdef PLATFORM_WIN32
#endif
+#if MONO_SUPPORT_TASKLETS
+MonoContinuationRestore
+mono_tasklets_arch_restore (void)
+{
+ static guint8* saved = NULL;
+ guint8 *code, *start;
+ int cont_reg = AMD64_R9; /* register usable on both call conventions */
+
+ if (saved)
+ return (MonoContinuationRestore)saved;
+ code = start = mono_global_codeman_reserve (64);
+ /* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
+ /* cont is in AMD64_ARG_REG1 ($rcx or $rdi)
+ * state is in AMD64_ARG_REG2 ($rdx or $rsi)
+ * lmf_addr is in AMD64_ARG_REG3 ($r8 or $rdx)
+ * We move cont to cont_reg since we need both rcx and rdi for the copy
+ * state is moved to $rax so it's setup as the return value and we can overwrite $rsi
+ */
+ amd64_mov_reg_reg (code, cont_reg, MONO_AMD64_ARG_REG1, 8);
+ amd64_mov_reg_reg (code, AMD64_RAX, MONO_AMD64_ARG_REG2, 8);
+ /* setup the copy of the stack */
+ amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, stack_used_size), sizeof (int));
+ amd64_shift_reg_imm (code, X86_SHR, AMD64_RCX, 3);
+ x86_cld (code);
+ amd64_mov_reg_membase (code, AMD64_RSI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, saved_stack), sizeof (gpointer));
+ amd64_mov_reg_membase (code, AMD64_RDI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_sp), sizeof (gpointer));
+ amd64_prefix (code, X86_REP_PREFIX);
+ amd64_movsl (code);
+
+ /* now restore the registers from the LMF */
+ amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, lmf), 8);
+ amd64_mov_reg_membase (code, AMD64_RBX, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbx), 8);
+ amd64_mov_reg_membase (code, AMD64_RBP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbp), 8);
+ amd64_mov_reg_membase (code, AMD64_R12, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r12), 8);
+ amd64_mov_reg_membase (code, AMD64_R13, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r13), 8);
+ amd64_mov_reg_membase (code, AMD64_R14, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r14), 8);
+ amd64_mov_reg_membase (code, AMD64_R15, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r15), 8);
+#ifdef PLATFORM_WIN32
+ amd64_mov_reg_membase (code, AMD64_RDI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rdi), 8);
+ amd64_mov_reg_membase (code, AMD64_RSI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsi), 8);
+#endif
+ amd64_mov_reg_membase (code, AMD64_RSP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsp), 8);
+ /* restore the lmf chain */
+ /*x86_mov_reg_membase (code, X86_ECX, X86_ESP, 12, 4);
+ x86_mov_membase_reg (code, X86_ECX, 0, X86_EDX, 4);*/
+
+ /* state is already in rax */
+ amd64_jump_membase (code, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_ip));
+ g_assert ((code - start) <= 64);
+ saved = start;
+ return (MonoContinuationRestore)saved;
+}
+#endif
projects / mono.git / blobdiff