#include <glib.h>
#include <signal.h>
#include <string.h>
+#include <stddef.h>
#include <ucontext.h>
#include <mono/arch/ppc/ppc-codegen.h>
#include "mini.h"
#include "mini-ppc.h"
-static gboolean arch_handle_exception (MonoContext *ctx, gpointer obj, gboolean test_only);
-
/*
struct sigcontext {
*/
-/* we have the stack pointer, not the base pointer in sigcontext */
-#define MONO_CONTEXT_SET_IP(ctx,ip) do { (ctx)->sc_ir = (int)ip; } while (0);
-#define MONO_CONTEXT_SET_BP(ctx,bp) do { (ctx)->sc_sp = (int)bp; } while (0);
-
-#define MONO_CONTEXT_GET_IP(ctx) ((gpointer)((ctx)->sc_ir))
-#define MONO_CONTEXT_GET_BP(ctx) ((gpointer)((ctx)->sc_sp))
-
-#ifdef __APPLE__
-
-typedef struct {
- unsigned long sp;
- unsigned long unused1;
- unsigned long lr;
-} MonoPPCStackFrame;
-
-#else
-
-typedef struct {
- unsigned long sp;
- unsigned long lr;
-} MonoPPCStackFrame;
-
-#endif
-
-/* disbale this for now */
-#undef MONO_USE_EXC_TABLES
-
-#ifdef MONO_USE_EXC_TABLES
-
-/*************************************/
-/* STACK UNWINDING STUFF */
-/*************************************/
-
-/* These definitions are from unwind-dw2.c in glibc 2.2.5 */
-
-/* For x86 */
-#define DWARF_FRAME_REGISTERS 17
-
-typedef struct frame_state
-{
- void *cfa;
- void *eh_ptr;
- long cfa_offset;
- long args_size;
- long reg_or_offset[DWARF_FRAME_REGISTERS+1];
- unsigned short cfa_reg;
- unsigned short retaddr_column;
- char saved[DWARF_FRAME_REGISTERS+1];
-} frame_state;
-
-#if 0
-
-static long
-get_sigcontext_reg (struct sigcontext *ctx, int dwarf_regnum)
-{
- switch (dwarf_regnum) {
- case X86_EAX:
- return ctx->SC_EAX;
- case X86_EBX:
- return ctx->SC_EBX;
- case X86_ECX:
- return ctx->SC_ECX;
- case X86_EDX:
- return ctx->SC_EDX;
- case X86_ESI:
- return ctx->SC_ESI;
- case X86_EDI:
- return ctx->SC_EDI;
- case X86_EBP:
- return ctx->SC_EBP;
- case X86_ESP:
- return ctx->SC_ESP;
- default:
- g_assert_not_reached ();
- }
-
- return 0;
-}
-
-static void
-set_sigcontext_reg (struct sigcontext *ctx, int dwarf_regnum, long value)
-{
- switch (dwarf_regnum) {
- case X86_EAX:
- ctx->SC_EAX = value;
- break;
- case X86_EBX:
- ctx->SC_EBX = value;
- break;
- case X86_ECX:
- ctx->SC_ECX = value;
- break;
- case X86_EDX:
- ctx->SC_EDX = value;
- break;
- case X86_ESI:
- ctx->SC_ESI = value;
- break;
- case X86_EDI:
- ctx->SC_EDI = value;
- break;
- case X86_EBP:
- ctx->SC_EBP = value;
- break;
- case X86_ESP:
- ctx->SC_ESP = value;
- break;
- case 8:
- ctx->SC_EIP = value;
- break;
- default:
- g_assert_not_reached ();
- }
-}
-
-typedef struct frame_state * (*framesf) (void *, struct frame_state *);
-
-static framesf frame_state_for = NULL;
-
-static gboolean inited = FALSE;
-
-typedef char ** (*get_backtrace_symbols_type) (void *__const *__array, int __size);
-
-static get_backtrace_symbols_type get_backtrace_symbols = NULL;
-
-static void
-init_frame_state_for (void)
-{
- GModule *module;
-
- /*
- * There are two versions of __frame_state_for: one in libgcc.a and the
- * other in glibc.so. We need the version from glibc.
- * For more info, see this:
- * http://gcc.gnu.org/ml/gcc/2002-08/msg00192.html
- */
- if ((module = g_module_open ("libc.so.6", G_MODULE_BIND_LAZY))) {
-
- if (!g_module_symbol (module, "__frame_state_for", (gpointer*)&frame_state_for))
- frame_state_for = NULL;
-
- if (!g_module_symbol (module, "backtrace_symbols", (gpointer*)&get_backtrace_symbols)) {
- get_backtrace_symbols = NULL;
- frame_state_for = NULL;
- }
-
- g_module_close (module);
- }
-
- inited = TRUE;
-}
-
-#endif
-
-/* mono_arch_has_unwind_info:
- *
- * Tests if a function has an DWARF exception table able to restore
- * all caller saved registers.
- */
-gboolean
-mono_arch_has_unwind_info (MonoMethod *method)
-{
-#if 0
- struct frame_state state_in;
- struct frame_state *res;
-
- if (!inited)
- init_frame_state_for ();
-
- if (!frame_state_for)
- return FALSE;
-
- g_assert (method->addr);
-
- memset (&state_in, 0, sizeof (state_in));
-
- /* offset 10 is just a guess, but it works for all methods tested */
- if ((res = frame_state_for ((char *)method->addr + 10, &state_in))) {
-
- if (res->saved [X86_EBX] != 1 ||
- res->saved [X86_EDI] != 1 ||
- res->saved [X86_EBP] != 1 ||
- res->saved [X86_ESI] != 1) {
- return FALSE;
- }
- return TRUE;
- } else {
- return FALSE;
- }
-#else
- return FALSE;
-#endif
-}
-
-struct stack_frame
-{
- void *next;
- void *return_address;
-};
-
-static MonoJitInfo *
-ppc_unwind_native_frame (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoContext *ctx,
- MonoContext *new_ctx, MonoLMF *lmf, char **trace)
-{
-#if 0
- struct stack_frame *frame;
- gpointer max_stack;
- MonoJitInfo *ji;
- struct frame_state state_in;
- struct frame_state *res;
-
- if (trace)
- *trace = NULL;
-
- if (!inited)
- init_frame_state_for ();
-
- if (!frame_state_for)
- return FALSE;
-
- frame = MONO_CONTEXT_GET_BP (ctx);
-
- max_stack = lmf && lmf->method ? lmf : jit_tls->end_of_stack;
-
- *new_ctx = *ctx;
-
- memset (&state_in, 0, sizeof (state_in));
-
- while ((gpointer)frame->next < (gpointer)max_stack) {
- gpointer ip, addr = frame->return_address;
- void *cfa;
- char *tmp, **symbols;
-
- if (trace) {
- ip = MONO_CONTEXT_GET_IP (new_ctx);
- symbols = get_backtrace_symbols (&ip, 1);
- if (*trace)
- tmp = g_strdup_printf ("%s\nin (unmanaged) %s", *trace, symbols [0]);
- else
- tmp = g_strdup_printf ("in (unmanaged) %s", symbols [0]);
-
- free (symbols);
- g_free (*trace);
- *trace = tmp;
- }
-
- if ((res = frame_state_for (addr, &state_in))) {
- int i;
-
- cfa = (gint8*) (get_sigcontext_reg (new_ctx, res->cfa_reg) + res->cfa_offset);
- frame = (struct stack_frame *)((gint8*)cfa - 8);
- for (i = 0; i < DWARF_FRAME_REGISTERS + 1; i++) {
- int how = res->saved[i];
- long val;
- g_assert ((how == 0) || (how == 1));
-
- if (how == 1) {
- val = * (long*) ((gint8*)cfa + res->reg_or_offset[i]);
- set_sigcontext_reg (new_ctx, i, val);
- }
- }
- new_ctx->SC_ESP = (long)cfa;
-
- if (res->saved [X86_EBX] == 1 &&
- res->saved [X86_EDI] == 1 &&
- res->saved [X86_EBP] == 1 &&
- res->saved [X86_ESI] == 1 &&
- (ji = mono_jit_info_table_find (domain, frame->return_address))) {
- //printf ("FRAME CFA %s\n", mono_method_full_name (ji->method, TRUE));
- return ji;
- }
-
- } else {
- //printf ("FRAME %p %p %p\n", frame, MONO_CONTEXT_GET_IP (new_ctx), mono_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (new_ctx)));
-
- MONO_CONTEXT_SET_IP (new_ctx, frame->return_address);
- frame = frame->next;
- MONO_CONTEXT_SET_BP (new_ctx, frame);
-
- /* stop if !frame or when we detect an unexpected managed frame */
- if (!frame || mono_jit_info_table_find (domain, frame->return_address)) {
- if (trace) {
- g_free (*trace);
- *trace = NULL;
- }
- return NULL;
- }
- }
- }
-
- //if (!lmf)
- //g_assert_not_reached ();
-
- if (trace) {
- g_free (*trace);
- *trace = NULL;
- }
-#endif
- return NULL;
-}
-
-#endif
#define restore_regs_from_context(ctx_reg,ip_reg,tmp_reg) do { \
int reg; \
* Returns a pointer to a method which restores a previously saved sigcontext.
* The first argument in r3 is the pointer to the context.
*/
-static gpointer
-arch_get_restore_context (void)
+gpointer
+mono_arch_get_restore_context (void)
{
guint8 *code;
- static guint8 start [128];
- static int inited = 0;
+ static guint8 *start = NULL;
- if (inited)
+ if (start)
return start;
- inited = 1;
- code = start;
+ code = start = mono_global_codeman_reserve (128);
restore_regs_from_context (ppc_r3, ppc_r4, ppc_r5);
/* restore also the stack pointer */
ppc_lwz (code, ppc_sp, G_STRUCT_OFFSET (MonoContext, sc_sp), ppc_r3);
/* never reached */
ppc_break (code);
- g_assert ((code - start) < sizeof(start));
+ g_assert ((code - start) < 128);
+ mono_arch_flush_icache (start, code - start);
return start;
}
/*
- * arch_get_call_filter:
+ * mono_arch_get_call_filter:
*
* Returns a pointer to a method which calls an exception filter. We
* also use this function to call finally handlers (we pass NULL as
* @exc object in this case).
*/
-static gpointer
-arch_get_call_filter (void)
+gpointer
+mono_arch_get_call_filter (void)
{
- static guint8 start [320];
- static int inited = 0;
+ static guint8 *start = NULL;
guint8 *code;
int alloc_size, pos, i;
- if (inited)
+ if (start)
return start;
- inited = 1;
/* call_filter (MonoContext *ctx, unsigned long eip, gpointer exc) */
- code = start;
+ code = start = mono_global_codeman_reserve (320);
/* save all the regs on the stack */
pos = 0;
alloc_size += PPC_STACK_ALIGNMENT - 1;
alloc_size &= ~(PPC_STACK_ALIGNMENT - 1);
+ /* allocate stack frame and set link from sp in ctx */
g_assert ((alloc_size & (PPC_STACK_ALIGNMENT-1)) == 0);
- ppc_stwu (code, ppc_sp, -alloc_size, ppc_sp);
+ ppc_lwz (code, ppc_r0, G_STRUCT_OFFSET (MonoContext, sc_sp), ppc_r3);
+ ppc_lwzx (code, ppc_r0, ppc_r0, ppc_r0);
+ ppc_stwu (code, ppc_r0, -alloc_size, ppc_sp);
/* restore all the regs from ctx (in r3), but not r1, the stack pointer */
restore_regs_from_context (ppc_r3, ppc_r6, ppc_r7);
ppc_blr (code);
- g_assert ((code - start) < sizeof(start));
+ g_assert ((code - start) < 320);
+ mono_arch_flush_icache (start, code - start);
return start;
}
static void
-throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong *int_regs, gdouble *fp_regs)
+throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong *int_regs, gdouble *fp_regs, gboolean rethrow)
{
static void (*restore_context) (MonoContext *);
MonoContext ctx;
if (!restore_context)
- restore_context = arch_get_restore_context ();
+ restore_context = mono_arch_get_restore_context ();
/* adjust eip so that it point into the call instruction */
eip -= 4;
memcpy (&ctx.regs, int_regs, sizeof (gulong) * MONO_SAVED_GREGS);
memcpy (&ctx.fregs, fp_regs, sizeof (double) * MONO_SAVED_FREGS);
- arch_handle_exception (&ctx, exc, FALSE);
+ if (mono_object_isinst (exc, mono_defaults.exception_class)) {
+ MonoException *mono_ex = (MonoException*)exc;
+ if (!rethrow)
+ mono_ex->stack_trace = NULL;
+ }
+ mono_handle_exception (&ctx, exc, (gpointer)eip, FALSE);
restore_context (&ctx);
g_assert_not_reached ();
*
*/
static gpointer
-mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_name)
+mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_name, gboolean rethrow)
{
guint8 *code;
int alloc_size, pos, i;
//ppc_break (code);
if (by_name) {
ppc_mr (code, ppc_r5, ppc_r3);
- ppc_load (code, ppc_r3, mono_defaults.corlib);
+ ppc_load (code, ppc_r3, (guint32)mono_defaults.corlib);
ppc_load (code, ppc_r4, "System");
- ppc_bl (code, 0);
- ppc_patch (code - 4, mono_exception_from_name);
+ ppc_load (code, ppc_r0, mono_exception_from_name);
+ ppc_mtctr (code, ppc_r0);
+ ppc_bcctrl (code, PPC_BR_ALWAYS, 0);
}
/* call throw_exception (exc, ip, sp, int_regs, fp_regs) */
/* pointer to the saved int regs */
pos -= sizeof (gulong) * MONO_SAVED_GREGS;
ppc_addi (code, ppc_r6, ppc_sp, pos);
+ ppc_li (code, ppc_r8, rethrow);
- ppc_bl (code, 0);
- ppc_patch (code - 4, throw_exception);
+ ppc_load (code, ppc_r0, throw_exception);
+ ppc_mtctr (code, ppc_r0);
+ ppc_bcctrl (code, PPC_BR_ALWAYS, 0);
/* we should never reach this breakpoint */
ppc_break (code);
g_assert ((code - start) < size);
+ mono_arch_flush_icache (start, code - start);
return start;
}
+/**
+ * mono_arch_get_rethrow_exception:
+ *
+ * Returns a function pointer which can be used to rethrow
+ * exceptions. The returned function has the following
+ * signature: void (*func) (MonoException *exc);
+ *
+ */
+gpointer
+mono_arch_get_rethrow_exception (void)
+{
+ static guint8 *start = NULL;
+ static int inited = 0;
+
+ if (inited)
+ return start;
+ start = mono_global_codeman_reserve (132);
+ mono_arch_get_throw_exception_generic (start, 132, FALSE, TRUE);
+ inited = 1;
+ return start;
+}
/**
* arch_get_throw_exception:
*
gpointer
mono_arch_get_throw_exception (void)
{
- static guint8 start [128];
+ static guint8 *start = NULL;
static int inited = 0;
if (inited)
return start;
- mono_arch_get_throw_exception_generic (start, sizeof (start), FALSE);
+ start = mono_global_codeman_reserve (132);
+ mono_arch_get_throw_exception_generic (start, 132, FALSE, FALSE);
inited = 1;
return start;
}
gpointer
mono_arch_get_throw_exception_by_name (void)
{
- static guint8 start [160];
+ static guint8 *start = NULL;
static int inited = 0;
if (inited)
return start;
- mono_arch_get_throw_exception_generic (start, sizeof (start), TRUE);
+ start = mono_global_codeman_reserve (168);
+ mono_arch_get_throw_exception_generic (start, 168, TRUE, FALSE);
inited = 1;
return start;
}
static MonoArray *
-glist_to_array (GList *list)
+glist_to_array (GList *list, MonoClass *eclass)
{
MonoDomain *domain = mono_domain_get ();
MonoArray *res;
return NULL;
len = g_list_length (list);
- res = mono_array_new (domain, mono_defaults.int_class, len);
+ res = mono_array_new (domain, eclass, len);
for (i = 0; list; list = list->next, i++)
mono_array_set (res, gpointer, i, list->data);
* start of the function or -1 if that info is not available.
*/
MonoJitInfo *
-mono_arch_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji,
- MonoContext *ctx, MonoContext *new_ctx, char **trace, MonoLMF **lmf,
- int *native_offset, gboolean *managed)
+mono_arch_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
+ MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
{
MonoJitInfo *ji;
gpointer ip = MONO_CONTEXT_GET_IP (ctx);
- unsigned long *ptr;
- char *p;
MonoPPCStackFrame *sframe;
/* Avoid costly table lookup during stack overflow */
else
ji = mono_jit_info_table_find (domain, ip);
- if (trace)
- *trace = NULL;
-
- if (native_offset)
- *native_offset = -1;
-
if (managed)
*managed = FALSE;
if (ji != NULL) {
- char *source_location, *tmpaddr, *fname;
- gint32 address, iloffset;
+ gint32 address;
int offset, i;
- gulong *ctx_regs;
*new_ctx = *ctx;
setup_context (new_ctx);
- if (*lmf && (MONO_CONTEXT_GET_BP (ctx) >= (gpointer)(*lmf)->ebp)) {
+ if (*lmf && (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->ebp)) {
/* remove any unused lmf */
*lmf = (*lmf)->previous_lmf;
}
address = (char *)ip - (char *)ji->code_start;
- if (native_offset)
- *native_offset = address;
-
if (managed)
if (!ji->method->wrapper_type)
*managed = TRUE;
- if (trace) {
- source_location = mono_debug_source_location_from_address (ji->method, address, NULL, domain);
- iloffset = mono_debug_il_offset_from_address (ji->method, address, domain);
-
- if (iloffset < 0)
- tmpaddr = g_strdup_printf ("<0x%05x>", address);
- else
- tmpaddr = g_strdup_printf ("[0x%05x]", iloffset);
-
- fname = mono_method_full_name (ji->method, TRUE);
-
- if (source_location)
- *trace = g_strdup_printf ("in %s (at %s) %s", tmpaddr, source_location, fname);
- else
- *trace = g_strdup_printf ("in %s %s", tmpaddr, fname);
-
- g_free (fname);
- g_free (source_location);
- g_free (tmpaddr);
- }
-#if 0
- offset = -1;
- /* restore caller saved registers */
- if (ji->used_regs & X86_EBX_MASK) {
- new_ctx->SC_EBX = *((int *)ctx->SC_EBP + offset);
- offset--;
- }
- if (ji->used_regs & X86_EDI_MASK) {
- new_ctx->SC_EDI = *((int *)ctx->SC_EBP + offset);
- offset--;
- }
- if (ji->used_regs & X86_ESI_MASK) {
- new_ctx->SC_ESI = *((int *)ctx->SC_EBP + offset);
- }
-
- new_ctx->SC_ESP = ctx->SC_EBP;
- /* we substract 1, so that the IP points into the call instruction */
- new_ctx->SC_EIP = *((int *)ctx->SC_EBP + 1) - 1;
- new_ctx->SC_EBP = *((int *)ctx->SC_EBP);
-#endif
- sframe = (MonoPPCStackFrame*)MONO_CONTEXT_GET_BP (ctx);
+ sframe = (MonoPPCStackFrame*)MONO_CONTEXT_GET_SP (ctx);
MONO_CONTEXT_SET_BP (new_ctx, sframe->sp);
- if (ji->used_regs) {
+ if (ji->method->save_lmf) {
+ memcpy (&new_ctx->fregs, (char*)sframe->sp - sizeof (double) * MONO_SAVED_FREGS, sizeof (double) * MONO_SAVED_FREGS);
+ memcpy (&new_ctx->regs, (char*)sframe->sp - sizeof (double) * MONO_SAVED_FREGS - sizeof (gulong) * MONO_SAVED_GREGS, sizeof (gulong) * MONO_SAVED_GREGS);
+ } else if (ji->used_regs) {
/* keep updated with emit_prolog in mini-ppc.c */
offset = 0;
/* FIXME handle floating point args
sframe = (MonoPPCStackFrame*)sframe->sp;
/* we substract 4, so that the IP points into the call instruction */
MONO_CONTEXT_SET_IP (new_ctx, sframe->lr - 4);
- *res = *ji;
- return res;
-#ifdef MONO_USE_EXC_TABLES
- } else if ((ji = ppc_unwind_native_frame (domain, jit_tls, ctx, new_ctx, *lmf, trace))) {
- *res = *ji;
- return res;
-#endif
+
+ return ji;
} else if (*lmf) {
*new_ctx = *ctx;
setup_context (new_ctx);
- if (!(*lmf)->method)
- return (gpointer)-1;
-
- if (trace)
- *trace = g_strdup_printf ("in (unmanaged) %s", mono_method_full_name ((*lmf)->method, TRUE));
-
if ((ji = mono_jit_info_table_find (domain, (gpointer)(*lmf)->eip))) {
- *res = *ji;
} else {
+ if (!(*lmf)->method)
+ return (gpointer)-1;
+
memset (res, 0, sizeof (MonoJitInfo));
res->method = (*lmf)->method;
}
-#if 0
- new_ctx->SC_ESI = (*lmf)->esi;
- new_ctx->SC_EDI = (*lmf)->edi;
- new_ctx->SC_EBX = (*lmf)->ebx;
- new_ctx->SC_EBP = (*lmf)->ebp;
- new_ctx->SC_EIP = (*lmf)->eip;
- /* the lmf is always stored on the stack, so the following
- * expression points to a stack location which can be used as ESP */
- new_ctx->SC_ESP = (unsigned long)&((*lmf)->eip);
-#endif
- /*sframe = (MonoPPCStackFrame*)MONO_CONTEXT_GET_BP (ctx);
+ /*sframe = (MonoPPCStackFrame*)MONO_CONTEXT_GET_SP (ctx);
MONO_CONTEXT_SET_BP (new_ctx, sframe->sp);
MONO_CONTEXT_SET_IP (new_ctx, sframe->lr);*/
MONO_CONTEXT_SET_BP (new_ctx, (*lmf)->ebp);
MONO_CONTEXT_SET_IP (new_ctx, (*lmf)->eip);
memcpy (&new_ctx->regs, (*lmf)->iregs, sizeof (gulong) * MONO_SAVED_GREGS);
memcpy (&new_ctx->fregs, (*lmf)->fregs, sizeof (double) * MONO_SAVED_FREGS);
+
+ /* FIXME: what about trampoline LMF frames? see exceptions-x86.c */
+
*lmf = (*lmf)->previous_lmf;
- return res;
-
+ return ji ? ji : res;
}
return NULL;
}
-MonoArray *
-ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
+/*
+ * This is the function called from the signal handler
+ */
+void
+mono_arch_sigctx_to_monoctx (void *ctx, MonoContext *mctx)
{
- MonoDomain *domain = mono_domain_get ();
- MonoArray *res;
- MonoArray *ta = exc->trace_ips;
- int i, len;
-
- len = mono_array_length (ta);
-
- res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
-
- for (i = skip; i < len; i++) {
- MonoJitInfo *ji;
- MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
- gpointer ip = mono_array_get (ta, gpointer, i);
-
- ji = mono_jit_info_table_find (domain, ip);
- g_assert (ji != NULL);
-
- sf->method = mono_method_get_object (domain, ji->method, NULL);
- sf->native_offset = (char *)ip - (char *)ji->code_start;
-
- sf->il_offset = mono_debug_il_offset_from_address (ji->method, sf->native_offset, domain);
-
- if (need_file_info) {
- gchar *filename;
-
- filename = mono_debug_source_location_from_address (ji->method, sf->native_offset, &sf->line, domain);
-
- sf->filename = filename? mono_string_new (domain, filename): NULL;
- sf->column = 0;
-
- g_free (filename);
- }
-
- mono_array_set (res, gpointer, i, sf);
- }
+ os_ucontext *uc = ctx;
- return res;
+ mctx->sc_ir = UCONTEXT_REG_NIP(uc);
+ mctx->sc_sp = UCONTEXT_REG_Rn(uc, 1);
+ memcpy (&mctx->regs, &UCONTEXT_REG_Rn(uc, 13), sizeof (gulong) * MONO_SAVED_GREGS);
+ memcpy (&mctx->fregs, &UCONTEXT_REG_FPRn(uc, 14), sizeof (double) * MONO_SAVED_FREGS);
}
void
-mono_jit_walk_stack (MonoStackWalk func, gpointer user_data) {
- MonoDomain *domain = mono_domain_get ();
- MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
- MonoJitInfo *ji, rji;
- gint native_offset, il_offset;
- gboolean managed;
- MonoPPCStackFrame *sframe;
-
- MonoContext ctx, new_ctx;
-
- setup_context (&ctx);
- setup_context (&new_ctx);
-
-#ifdef __APPLE__
- __asm__ volatile("lwz %0,0(r1)" : "=r" (sframe));
-#else
- __asm__ volatile("lwz %0,0(1)" : "=r" (sframe));
-#endif
- MONO_CONTEXT_SET_IP (&ctx, sframe->lr);
- MONO_CONTEXT_SET_BP (&ctx, sframe->sp);
-
- while (MONO_CONTEXT_GET_BP (&ctx) < jit_tls->end_of_stack) {
-
- ji = mono_arch_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, &native_offset, &managed);
- g_assert (ji);
-
- if (ji == (gpointer)-1)
- return;
-
- il_offset = mono_debug_il_offset_from_address (ji->method, native_offset, domain);
+mono_arch_monoctx_to_sigctx (MonoContext *mctx, void *ctx)
+{
+ os_ucontext *uc = ctx;
- if (func (ji->method, native_offset, il_offset, managed, user_data))
- return;
-
- ctx = new_ctx;
- setup_context (&ctx);
- }
+ UCONTEXT_REG_NIP(uc) = mctx->sc_ir;
+ UCONTEXT_REG_Rn(uc, 1) = mctx->sc_sp;
+ memcpy (&UCONTEXT_REG_Rn(uc, 13), &mctx->regs, sizeof (gulong) * MONO_SAVED_GREGS);
+ memcpy (&UCONTEXT_REG_FPRn(uc, 14), &mctx->fregs, sizeof (double) * MONO_SAVED_FREGS);
}
-MonoBoolean
-ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
- MonoReflectionMethod **method,
- gint32 *iloffset, gint32 *native_offset,
- MonoString **file, gint32 *line, gint32 *column)
+gpointer
+mono_arch_ip_from_context (void *sigctx)
{
- MonoDomain *domain = mono_domain_get ();
- MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
- MonoJitInfo *ji, rji;
- MonoContext ctx, new_ctx;
-
- MONO_CONTEXT_SET_IP (&ctx, ves_icall_get_frame_info);
- MONO_CONTEXT_SET_BP (&ctx, __builtin_frame_address (0));
-
- skip++;
-
- do {
- ji = mono_arch_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, native_offset, NULL);
-
- ctx = new_ctx;
-
- if (!ji || ji == (gpointer)-1 || MONO_CONTEXT_GET_BP (&ctx) >= jit_tls->end_of_stack)
- return FALSE;
-
- /* skip all wrappers ??*/
- if (ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
- ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
- ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE)
- continue;
-
- skip--;
-
- } while (skip >= 0);
-
- *method = mono_method_get_object (domain, ji->method, NULL);
- *iloffset = mono_debug_il_offset_from_address (ji->method, *native_offset, domain);
-
- if (need_file_info) {
- gchar *filename;
-
- filename = mono_debug_source_location_from_address (ji->method, *native_offset, line, domain);
-
- *file = filename? mono_string_new (domain, filename): NULL;
- *column = 0;
-
- g_free (filename);
- }
-
- return TRUE;
+ os_ucontext *uc = sigctx;
+ return (gpointer)UCONTEXT_REG_NIP(uc);
}
-/*
- * This is the function called from the signal handler
- */
-#ifdef __APPLE__
-gboolean
-mono_arch_handle_exception (void *ctx, gpointer obj, gboolean test_only)
+#ifndef __APPLE__
+static void
+altstack_handle_and_restore (void *sigctx, gpointer obj, gboolean test_only)
{
- struct ucontext *uc = ctx;
+ void (*restore_context) (MonoContext *);
MonoContext mctx;
- gboolean result;
-
- mctx.sc_ir = uc->uc_mcontext->ss.srr0;
- mctx.sc_sp = uc->uc_mcontext->ss.r1;
- memcpy (&mctx.regs, &uc->uc_mcontext->ss.r13, sizeof (gulong) * MONO_SAVED_GREGS);
- memcpy (&mctx.fregs, &uc->uc_mcontext->fs.fpregs [14], sizeof (double) * MONO_SAVED_FREGS);
- result = arch_handle_exception (&mctx, obj, test_only);
- /* restore the context so that returning from the signal handler will invoke
- * the catch clause
- */
- uc->uc_mcontext->ss.srr0 = mctx.sc_ir;
- uc->uc_mcontext->ss.r1 = mctx.sc_sp;
- memcpy (&uc->uc_mcontext->ss.r13, &mctx.regs, sizeof (gulong) * MONO_SAVED_GREGS);
- memcpy (&uc->uc_mcontext->fs.fpregs [14], &mctx.fregs, sizeof (double) * MONO_SAVED_FREGS);
- return result;
+ restore_context = mono_arch_get_restore_context ();
+ mono_arch_sigctx_to_monoctx (sigctx, &mctx);
+ mono_handle_exception (&mctx, obj, (gpointer)mctx.sc_ir, test_only);
+ restore_context (&mctx);
}
-gpointer
-mono_arch_ip_from_context (void *sigctx)
+void
+mono_arch_handle_altstack_exception (void *sigctx, gpointer fault_addr, gboolean stack_ovf)
{
- struct ucontext *uc = sigctx;
- return (gpointer)uc->uc_mcontext->ss.srr0;
+#ifdef MONO_ARCH_USE_SIGACTION
+ ucontext_t *uc = (ucontext_t*)sigctx;
+ ucontext_t *uc_copy;
+ MonoJitInfo *ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context (sigctx));
+ gpointer *sp;
+ int frame_size;
+
+ if (stack_ovf) {
+ const char *method;
+ /* we don't do much now, but we can warn the user with a useful message */
+ fprintf (stderr, "Stack overflow: IP: %p, SP: %p\n", mono_arch_ip_from_context (sigctx), (gpointer)UCONTEXT_REG_Rn(uc, 1));
+ if (ji && ji->method)
+ method = mono_method_full_name (ji->method, TRUE);
+ else
+ method = "Unmanaged";
+ fprintf (stderr, "At %s\n", method);
+ abort ();
+ }
+ if (!ji)
+ mono_handle_native_sigsegv (SIGSEGV, sigctx);
+ /* setup a call frame on the real stack so that control is returned there
+ * and exception handling can continue.
+ * The frame looks like:
+ * ucontext struct
+ * ...
+ * 224 is the size of the red zone
+ */
+ frame_size = sizeof (ucontext_t) + sizeof (gpointer) * 16 + 224;
+ frame_size += 15;
+ frame_size &= ~15;
+ sp = (gpointer)(UCONTEXT_REG_Rn(uc, 1) & ~15);
+ sp = (gpointer)((char*)sp - frame_size);
+ /* may need to adjust pointers in the new struct copy, depending on the OS */
+ uc_copy = (ucontext_t*)(sp + 16);
+ memcpy (uc_copy, uc, sizeof (os_ucontext));
+#ifdef __linux__
+ uc_copy->uc_mcontext.uc_regs = (gpointer)((char*)uc_copy + ((char*)uc->uc_mcontext.uc_regs - (char*)uc));
+#endif
+ g_assert (mono_arch_ip_from_context (uc) == mono_arch_ip_from_context (uc_copy));
+ /* at the return form the signal handler execution starts in altstack_handle_and_restore() */
+ UCONTEXT_REG_LNK(uc) = UCONTEXT_REG_NIP(uc);
+ UCONTEXT_REG_NIP(uc) = (unsigned long)altstack_handle_and_restore;
+ UCONTEXT_REG_Rn(uc, 1) = (unsigned long)sp;
+ UCONTEXT_REG_Rn(uc, PPC_FIRST_ARG_REG) = (unsigned long)(sp + 16);
+ UCONTEXT_REG_Rn(uc, PPC_FIRST_ARG_REG + 1) = 0;
+ UCONTEXT_REG_Rn(uc, PPC_FIRST_ARG_REG + 2) = 0;
+#endif
}
-#else
-/* Linux */
+#endif
+
gboolean
mono_arch_handle_exception (void *ctx, gpointer obj, gboolean test_only)
{
- struct ucontext *uc = ctx;
MonoContext mctx;
gboolean result;
-
- mctx.sc_ir = uc->uc_mcontext.uc_regs->gregs [PT_NIP];
- mctx.sc_sp = uc->uc_mcontext.uc_regs->gregs [PT_R1];
- memcpy (&mctx.regs, &uc->uc_mcontext.uc_regs->gregs [PT_R13], sizeof (gulong) * MONO_SAVED_GREGS);
- memcpy (&mctx.fregs, &uc->uc_mcontext.uc_regs->fpregs.fpregs [14], sizeof (double) * MONO_SAVED_FREGS);
- result = arch_handle_exception (&mctx, obj, test_only);
+ mono_arch_sigctx_to_monoctx (ctx, &mctx);
+
+ result = mono_handle_exception (&mctx, obj, (gpointer)mctx.sc_ir, test_only);
/* restore the context so that returning from the signal handler will invoke
* the catch clause
*/
- uc->uc_mcontext.uc_regs->gregs [PT_NIP] = mctx.sc_ir;
- uc->uc_mcontext.uc_regs->gregs [PT_R1] = mctx.sc_sp;
- memcpy (&uc->uc_mcontext.uc_regs->gregs [PT_R13], &mctx.regs, sizeof (gulong) * MONO_SAVED_GREGS);
- memcpy (&uc->uc_mcontext.uc_regs->fpregs.fpregs [14], &mctx.fregs, sizeof (double) * MONO_SAVED_FREGS);
+ mono_arch_monoctx_to_sigctx (&mctx, ctx);
return result;
}
-gpointer
-mono_arch_ip_from_context (void *sigctx)
-{
- struct ucontext *uc = sigctx;
- return (gpointer)uc->uc_mcontext.uc_regs->gregs [PT_NIP];
-}
-
-#endif
-
-/**
- * arch_handle_exception:
- * @ctx: saved processor state
- * @obj: the exception object
- * @test_only: only test if the exception is caught, but dont call handlers
- *
- *
- */
-static gboolean
-arch_handle_exception (MonoContext *ctx, gpointer obj, gboolean test_only)
-{
- MonoDomain *domain = mono_domain_get ();
- MonoJitInfo *ji, rji;
- static int (*call_filter) (MonoContext *, gpointer, gpointer) = NULL;
- MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
- GList *trace_ips = NULL;
- MonoException *mono_ex;
- MonoString *initial_stack_trace;
-
- g_assert (ctx != NULL);
- if (!obj) {
- MonoException *ex = mono_get_exception_null_reference ();
- ex->message = mono_string_new (domain,
- "Object reference not set to an instance of an object");
- obj = (MonoObject *)ex;
- }
-
- if (mono_object_isinst (obj, mono_defaults.exception_class)) {
- mono_ex = (MonoException*)obj;
- initial_stack_trace = mono_ex->stack_trace;
- } else {
- mono_ex = NULL;
- }
-
-
- if (!call_filter)
- call_filter = arch_get_call_filter ();
-
- g_assert (jit_tls->end_of_stack);
- g_assert (jit_tls->abort_func);
-
- if (!test_only) {
- MonoContext ctx_cp = *ctx;
- setup_context (&ctx_cp);
- if (mono_jit_trace_calls != NULL)
- g_print ("EXCEPTION handling: %s\n", mono_object_class (obj)->name);
- if (!arch_handle_exception (&ctx_cp, obj, TRUE)) {
- if (mono_break_on_exc)
- G_BREAKPOINT ();
- mono_unhandled_exception (obj);
- }
- }
-
- memset (&rji, 0, sizeof (rji));
-
- while (1) {
- MonoContext new_ctx;
- char *trace = NULL;
-
- setup_context (&new_ctx);
- ji = mono_arch_find_jit_info (domain, jit_tls, &rji, &rji, ctx, &new_ctx,
- test_only ? &trace : NULL, &lmf, NULL, NULL);
- if (!ji) {
- g_warning ("Exception inside function without unwind info");
- g_assert_not_reached ();
- }
-
- if (ji != (gpointer)-1) {
-
- if (test_only && ji->method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
- char *tmp, *strace;
-
- if (!initial_stack_trace) {
- trace_ips = g_list_append (trace_ips, MONO_CONTEXT_GET_IP (ctx));
-
- if (!mono_ex->stack_trace)
- strace = g_strdup ("");
- else
- strace = mono_string_to_utf8 (mono_ex->stack_trace);
-
- tmp = g_strdup_printf ("%s%s\n", strace, trace);
- g_free (strace);
-
- mono_ex->stack_trace = mono_string_new (domain, tmp);
-
- g_free (tmp);
- }
- }
-
- if (ji->num_clauses) {
- int i;
-
- g_assert (ji->clauses);
-
- for (i = 0; i < ji->num_clauses; i++) {
- MonoJitExceptionInfo *ei = &ji->clauses [i];
-
- if (ei->try_start <= MONO_CONTEXT_GET_IP (ctx) &&
- MONO_CONTEXT_GET_IP (ctx) <= ei->try_end) {
- /* catch block */
- if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
- mono_object_isinst (obj, mono_class_get (ji->method->klass->image, ei->data.token))) ||
- ((ei->flags == MONO_EXCEPTION_CLAUSE_FILTER &&
- call_filter (ctx, ei->data.filter, obj)))) {
- if (test_only) {
- if (mono_ex)
- mono_ex->trace_ips = glist_to_array (trace_ips);
- g_list_free (trace_ips);
- g_free (trace);
- return TRUE;
- }
- if (mono_jit_trace_calls != NULL)
- g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
- /*printf ("stack for catch: %p\n", MONO_CONTEXT_GET_BP (ctx));*/
- MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
- /* need to use the frame pointer (ppc_r31), not r1 (regs start from register r13): methods with clauses always have r31 */
- *((gpointer *)((char *)(ctx->regs [ppc_r31-13]) + ji->exvar_offset)) = obj;
- jit_tls->lmf = lmf;
- g_free (trace);
- return 0;
- }
- if (!test_only && ei->try_start <= MONO_CONTEXT_GET_IP (ctx) &&
- MONO_CONTEXT_GET_IP (ctx) < ei->try_end &&
- (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
- if (mono_jit_trace_calls != NULL)
- g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
- call_filter (ctx, ei->handler_start, NULL);
- }
-
- }
- }
- }
- }
-
- g_free (trace);
-
- *ctx = new_ctx;
- setup_context (ctx);
-
- if ((ji == (gpointer)-1) || MONO_CONTEXT_GET_BP (ctx) >= jit_tls->end_of_stack) {
- if (!test_only) {
- jit_tls->lmf = lmf;
- jit_tls->abort_func (obj);
- g_assert_not_reached ();
- } else {
- if (mono_ex)
- mono_ex->trace_ips = glist_to_array (trace_ips);
- g_list_free (trace_ips);
- return FALSE;
- }
- }
- }
-
- g_assert_not_reached ();
-}
-
gboolean
mono_arch_has_unwind_info (gconstpointer addr)
{
projects / mono.git / blobdiff