2010-01-20 Zoltan Varga <vargaz@gmail.com>
+ * xdebug.c: New file extracted from aot-compiler.c, containing the XDEBUG
+ related code.
+
* aot-compiler.c (encode_method_ref): Use mono_marshal_wrapper_info_from_wrapper
() in one place.
(mono_aot_wrapper_name): Remove the special handling of delegate invoke wrappers,
mini-gc.h \
mini-gc.c \
debugger-agent.h \
- debugger-agent.c
+ debugger-agent.c \
+ xdebug.c
test_sources = \
basic-calls.cs \
}
/*
- * arch_get_cie_program:
+ * mono_arch_get_cie_program:
*
* Get the unwind bytecode for the DWARF CIE.
*/
-static GSList*
-arch_get_cie_program (void)
+GSList*
+mono_arch_get_cie_program (void)
{
#ifdef TARGET_AMD64
GSList *l = NULL;
img_writer_emit_start (acfg->w);
if (acfg->dwarf)
- mono_dwarf_writer_emit_base_info (acfg->dwarf, arch_get_cie_program ());
+ mono_dwarf_writer_emit_base_info (acfg->dwarf, mono_arch_get_cie_program ());
emit_code (acfg);
return 0;
}
-
-/*
- * Support for emitting debug info for JITted code.
- *
- * This works as follows:
- * - the runtime writes out an xdb.s file containing DWARF debug info.
- * - the user calls a gdb macro
- * - the macro compiles and loads this shared library using add-symbol-file.
- *
- * This is based on the xdebug functionality in the Kaffe Java VM.
- *
- * We emit assembly code instead of using the ELF writer, so we can emit debug info
- * incrementally as each method is JITted, and the debugger doesn't have to call
- * into the runtime to emit the shared library, which would cause all kinds of
- * complications, like threading issues, and the fact that the ELF writer's
- * emit_writeout () function cannot be called more than once.
- * GDB 7.0 and later has a JIT interface.
- */
-
-#define USE_GDB_JIT_INTERFACE
-
-/* The recommended gdb macro is: */
-/*
- define xdb
- shell rm -f xdb.so && as --64 -o xdb.o xdb.s && ld -shared -o xdb.so xdb.o
- add-symbol-file xdb.so 0
- end
-*/
-
-/*
- * GDB JIT interface definitions.
- *
- * http://sources.redhat.com/gdb/onlinedocs/gdb_30.html
- */
-typedef enum
-{
- JIT_NOACTION = 0,
- JIT_REGISTER_FN,
- JIT_UNREGISTER_FN
-} jit_actions_t;
-
-struct jit_code_entry
-{
- struct jit_code_entry *next_entry;
- struct jit_code_entry *prev_entry;
- const char *symfile_addr;
- guint64 symfile_size;
-};
-
-struct jit_descriptor
-{
- guint32 version;
- /* This type should be jit_actions_t, but we use guint32
- to be explicit about the bitwidth. */
- guint32 action_flag;
- struct jit_code_entry *relevant_entry;
- struct jit_code_entry *first_entry;
-};
-
-
-#ifdef _MSC_VER
-#define MONO_NOINLINE __declspec (noinline)
-#else
-#define MONO_NOINLINE __attribute__((noinline))
-#endif
-
-/* GDB puts a breakpoint in this function. */
-void MONO_NOINLINE __jit_debug_register_code(void);
-
-#if defined(ENABLE_LLVM) && ((LLVM_MAJOR_VERSION == 2 && LLVM_MINOR_VERSION >= 7) || LLVM_MAJOR_VERSION > 2)
-/* LLVM already defines these */
-extern struct jit_descriptor __jit_debug_descriptor;
-#else
-
-/* Make sure to specify the version statically, because the
- debugger may check the version before we can set it. */
-struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
-
-void MONO_NOINLINE __jit_debug_register_code(void) { };
-#endif
-
-static MonoImageWriter *xdebug_w;
-static MonoDwarfWriter *xdebug_writer;
-static FILE *xdebug_fp, *il_file;
-static gboolean use_gdb_interface, save_symfiles;
-static int il_file_line_index;
-static GHashTable *xdebug_syms;
-
-void
-mono_xdebug_init (char *options)
-{
- MonoImageWriter *w;
- char **args, **ptr;
-
- args = g_strsplit (options, ",", -1);
- for (ptr = args; ptr && *ptr; ptr ++) {
- char *arg = *ptr;
-
- if (!strcmp (arg, "gdb"))
- use_gdb_interface = TRUE;
- if (!strcmp (arg, "save-symfiles"))
- save_symfiles = TRUE;
- }
-
- /* This file will contain the IL code for methods which don't have debug info */
- il_file = fopen ("xdb.il", "w");
-
- if (use_gdb_interface)
- return;
-
- unlink ("xdb.s");
- xdebug_fp = fopen ("xdb.s", "w");
-
- w = img_writer_create (xdebug_fp, FALSE);
-
- img_writer_emit_start (w);
-
- xdebug_writer = mono_dwarf_writer_create (w, il_file, 0, TRUE);
-
- /* Emit something so the file has a text segment */
- img_writer_emit_section_change (w, ".text", 0);
- img_writer_emit_string (w, "");
-
- mono_dwarf_writer_emit_base_info (xdebug_writer, arch_get_cie_program ());
-}
-
-static void
-xdebug_begin_emit (MonoImageWriter **out_w, MonoDwarfWriter **out_dw)
-{
- MonoImageWriter *w;
- MonoDwarfWriter *dw;
-
- w = img_writer_create (NULL, TRUE);
-
- img_writer_emit_start (w);
-
- /* This file will contain the IL code for methods which don't have debug info */
- if (!il_file)
- il_file = fopen ("xdb.il", "w");
-
- dw = mono_dwarf_writer_create (w, il_file, il_file_line_index, FALSE);
-
- mono_dwarf_writer_emit_base_info (dw, arch_get_cie_program ());
-
- *out_w = w;
- *out_dw = dw;
-}
-
-static void
-xdebug_end_emit (MonoImageWriter *w, MonoDwarfWriter *dw, MonoMethod *method)
-{
- guint8 *img;
- guint32 img_size;
- struct jit_code_entry *entry;
-
- il_file_line_index = mono_dwarf_writer_get_il_file_line_index (dw);
- mono_dwarf_writer_close (dw);
-
- img_writer_emit_writeout (w);
-
- img = img_writer_get_output (w, &img_size);
-
- img_writer_destroy (w);
-
- if (FALSE) {
- /* Save the symbol files to help debugging */
- FILE *fp;
- char *file_name;
- static int file_counter;
-
- file_counter ++;
- file_name = g_strdup_printf ("xdb-%d.o", file_counter);
- //printf ("%s -> %s\n", mono_method_full_name (method, TRUE), file_name);
-
- fp = fopen (file_name, "w");
- fwrite (img, img_size, 1, fp);
- fclose (fp);
- g_free (file_name);
- }
-
- /* Register the image with GDB */
-
- entry = g_malloc (sizeof (struct jit_code_entry));
-
- entry->symfile_addr = (const char*)img;
- entry->symfile_size = img_size;
-
- entry->next_entry = __jit_debug_descriptor.first_entry;
- if (__jit_debug_descriptor.first_entry)
- __jit_debug_descriptor.first_entry->prev_entry = entry;
- __jit_debug_descriptor.first_entry = entry;
-
- __jit_debug_descriptor.relevant_entry = entry;
- __jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
-
- __jit_debug_register_code ();
-}
-
-/*
- * mono_xdebug_flush:
- *
- * This could be called from inside gdb to flush the debugging information not yet
- * registered with gdb.
- */
-void
-mono_xdebug_flush (void)
-{
- if (xdebug_w)
- xdebug_end_emit (xdebug_w, xdebug_writer, NULL);
-
- xdebug_begin_emit (&xdebug_w, &xdebug_writer);
-}
-
-static int xdebug_method_count;
-
-/*
- * mono_save_xdebug_info:
- *
- * Emit debugging info for METHOD into an assembly file which can be assembled
- * and loaded into gdb to provide debugging info for JITted code.
- * LOCKING: Acquires the loader lock.
- */
-void
-mono_save_xdebug_info (MonoCompile *cfg)
-{
- if (use_gdb_interface) {
- mono_loader_lock ();
-
- if (!xdebug_syms)
- xdebug_syms = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
-
- /*
- * gdb is not designed to handle 1000s of symbol files (one per method). So we
- * group them into groups of 100.
- */
- if ((xdebug_method_count % 100) == 0)
- mono_xdebug_flush ();
-
- xdebug_method_count ++;
-
- mono_dwarf_writer_emit_method (xdebug_writer, cfg, cfg->jit_info->method, NULL, NULL, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->method, mono_domain_get ()));
-
-#if 0
- /*
- * Emit a symbol for the code by emitting it at the beginning of the text
- * segment, and setting the text segment to have an absolute address.
- * This symbol can be used to set breakpoints in gdb.
- * FIXME: This doesn't work when multiple methods are emitted into the same file.
- */
- sym = get_debug_sym (cfg->jit_info->method, "", xdebug_syms);
- img_writer_emit_section_change (w, ".text", 0);
- if (!xdebug_text_addr) {
- xdebug_text_addr = cfg->jit_info->code_start;
- img_writer_set_section_addr (w, (gssize)xdebug_text_addr);
- }
- img_writer_emit_global_with_size (w, sym, cfg->jit_info->code_size, TRUE);
- img_writer_emit_label (w, sym);
- img_writer_emit_bytes (w, cfg->jit_info->code_start, cfg->jit_info->code_size);
- g_free (sym);
-#endif
-
- mono_loader_unlock ();
- } else {
- if (!xdebug_writer)
- return;
-
- mono_loader_lock ();
- mono_dwarf_writer_emit_method (xdebug_writer, cfg, cfg->jit_info->method, NULL, NULL, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->method, mono_domain_get ()));
- fflush (xdebug_fp);
- mono_loader_unlock ();
- }
-}
-
-/*
- * mono_save_trampoline_xdebug_info:
- *
- * Same as mono_save_xdebug_info, but for trampolines.
- * LOCKING: Acquires the loader lock.
- */
-void
-mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
-{
- if (use_gdb_interface) {
- MonoImageWriter *w;
- MonoDwarfWriter *dw;
-
- mono_loader_lock ();
-
- xdebug_begin_emit (&w, &dw);
-
- mono_dwarf_writer_emit_trampoline (dw, tramp_name, NULL, NULL, code, code_size, unwind_info);
-
- xdebug_end_emit (w, dw, NULL);
-
- mono_loader_unlock ();
- } else {
- if (!xdebug_writer)
- return;
-
- mono_loader_lock ();
- mono_dwarf_writer_emit_trampoline (xdebug_writer, tramp_name, NULL, NULL, code, code_size, unwind_info);
- fflush (xdebug_fp);
- mono_loader_unlock ();
- }
-}
#else
return 0;
}
-void
-mono_xdebug_init (char *options)
-{
-}
-
-void
-mono_save_xdebug_info (MonoCompile *cfg)
-{
-}
-
-void
-mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
-{
-}
-
#endif
GSList* mono_arch_get_delegate_invoke_impls (void) MONO_INTERNAL;
LLVMCallInfo* mono_arch_get_llvm_call_info (MonoCompile *cfg, MonoMethodSignature *sig) MONO_INTERNAL;
guint8* mono_arch_emit_load_got_addr (guint8 *start, guint8 *code, MonoCompile *cfg, MonoJumpInfo **ji) MONO_INTERNAL;
-guint8* mono_arch_emit_load_aotconst (guint8 *start, guint8 *code, MonoJumpInfo **ji, int tramp_type, gconstpointer target) MONO_INTERNAL;
+guint8* mono_arch_emit_load_aotconst (guint8 *start, guint8 *code, MonoJumpInfo **ji, int tramp_type, gconstpointer target) MONO_INTERNAL;
+GSList* mono_arch_get_cie_program (void) MONO_INTERNAL;
/* Soft Debug support */
#ifdef MONO_ARCH_SOFT_DEBUG_SUPPORTED
--- /dev/null
+/*
+ * xdebug.c: Support for emitting gdb debug info for JITted code.
+ *
+ * Author:
+ * Zoltan Varga (vargaz@gmail.com)
+ *
+ * (C) 20010 Novell, Inc.
+ */
+
+/*
+ * This works as follows:
+ * - the runtime writes out an xdb.s file containing DWARF debug info.
+ * - the user calls a gdb macro
+ * - the macro compiles and loads this shared library using add-symbol-file.
+ *
+ * This is based on the xdebug functionality in the Kaffe Java VM.
+ *
+ * We emit assembly code instead of using the ELF writer, so we can emit debug info
+ * incrementally as each method is JITted, and the debugger doesn't have to call
+ * into the runtime to emit the shared library, which would cause all kinds of
+ * complications, like threading issues, and the fact that the ELF writer's
+ * emit_writeout () function cannot be called more than once.
+ * GDB 7.0 and later has a JIT interface.
+ */
+
+#if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
+
+#include "config.h"
+#include <sys/types.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <fcntl.h>
+#include <ctype.h>
+#include <string.h>
+#ifndef HOST_WIN32
+#include <sys/time.h>
+#else
+#include <winsock2.h>
+#include <windows.h>
+#endif
+
+#include <errno.h>
+#include <sys/stat.h>
+
+#include "mini.h"
+#include "image-writer.h"
+#include "dwarfwriter.h"
+
+#define USE_GDB_JIT_INTERFACE
+
+/* The recommended gdb macro is: */
+/*
+ define xdb
+ shell rm -f xdb.so && as --64 -o xdb.o xdb.s && ld -shared -o xdb.so xdb.o
+ add-symbol-file xdb.so 0
+ end
+*/
+
+/*
+ * GDB JIT interface definitions.
+ *
+ * http://sources.redhat.com/gdb/onlinedocs/gdb_30.html
+ */
+typedef enum
+{
+ JIT_NOACTION = 0,
+ JIT_REGISTER_FN,
+ JIT_UNREGISTER_FN
+} jit_actions_t;
+
+struct jit_code_entry
+{
+ struct jit_code_entry *next_entry;
+ struct jit_code_entry *prev_entry;
+ const char *symfile_addr;
+ guint64 symfile_size;
+};
+
+struct jit_descriptor
+{
+ guint32 version;
+ /* This type should be jit_actions_t, but we use guint32
+ to be explicit about the bitwidth. */
+ guint32 action_flag;
+ struct jit_code_entry *relevant_entry;
+ struct jit_code_entry *first_entry;
+};
+
+
+#ifdef _MSC_VER
+#define MONO_NOINLINE __declspec (noinline)
+#else
+#define MONO_NOINLINE __attribute__((noinline))
+#endif
+
+/* GDB puts a breakpoint in this function. */
+void MONO_NOINLINE __jit_debug_register_code(void);
+
+#if defined(ENABLE_LLVM) && ((LLVM_MAJOR_VERSION == 2 && LLVM_MINOR_VERSION >= 7) || LLVM_MAJOR_VERSION > 2)
+/* LLVM already defines these */
+extern struct jit_descriptor __jit_debug_descriptor;
+#else
+
+/* Make sure to specify the version statically, because the
+ debugger may check the version before we can set it. */
+struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
+
+void MONO_NOINLINE __jit_debug_register_code(void) { };
+#endif
+
+static MonoImageWriter *xdebug_w;
+static MonoDwarfWriter *xdebug_writer;
+static FILE *xdebug_fp, *il_file;
+static gboolean use_gdb_interface, save_symfiles;
+static int il_file_line_index;
+static GHashTable *xdebug_syms;
+
+void
+mono_xdebug_init (char *options)
+{
+ MonoImageWriter *w;
+ char **args, **ptr;
+
+ args = g_strsplit (options, ",", -1);
+ for (ptr = args; ptr && *ptr; ptr ++) {
+ char *arg = *ptr;
+
+ if (!strcmp (arg, "gdb"))
+ use_gdb_interface = TRUE;
+ if (!strcmp (arg, "save-symfiles"))
+ save_symfiles = TRUE;
+ }
+
+ /* This file will contain the IL code for methods which don't have debug info */
+ il_file = fopen ("xdb.il", "w");
+
+ if (use_gdb_interface)
+ return;
+
+ unlink ("xdb.s");
+ xdebug_fp = fopen ("xdb.s", "w");
+
+ w = img_writer_create (xdebug_fp, FALSE);
+
+ img_writer_emit_start (w);
+
+ xdebug_writer = mono_dwarf_writer_create (w, il_file, 0, TRUE);
+
+ /* Emit something so the file has a text segment */
+ img_writer_emit_section_change (w, ".text", 0);
+ img_writer_emit_string (w, "");
+
+ mono_dwarf_writer_emit_base_info (xdebug_writer, mono_arch_get_cie_program ());
+}
+
+static void
+xdebug_begin_emit (MonoImageWriter **out_w, MonoDwarfWriter **out_dw)
+{
+ MonoImageWriter *w;
+ MonoDwarfWriter *dw;
+
+ w = img_writer_create (NULL, TRUE);
+
+ img_writer_emit_start (w);
+
+ /* This file will contain the IL code for methods which don't have debug info */
+ if (!il_file)
+ il_file = fopen ("xdb.il", "w");
+
+ dw = mono_dwarf_writer_create (w, il_file, il_file_line_index, FALSE);
+
+ mono_dwarf_writer_emit_base_info (dw, mono_arch_get_cie_program ());
+
+ *out_w = w;
+ *out_dw = dw;
+}
+
+static void
+xdebug_end_emit (MonoImageWriter *w, MonoDwarfWriter *dw, MonoMethod *method)
+{
+ guint8 *img;
+ guint32 img_size;
+ struct jit_code_entry *entry;
+
+ il_file_line_index = mono_dwarf_writer_get_il_file_line_index (dw);
+ mono_dwarf_writer_close (dw);
+
+ img_writer_emit_writeout (w);
+
+ img = img_writer_get_output (w, &img_size);
+
+ img_writer_destroy (w);
+
+ if (FALSE) {
+ /* Save the symbol files to help debugging */
+ FILE *fp;
+ char *file_name;
+ static int file_counter;
+
+ file_counter ++;
+ file_name = g_strdup_printf ("xdb-%d.o", file_counter);
+ //printf ("%s -> %s\n", mono_method_full_name (method, TRUE), file_name);
+
+ fp = fopen (file_name, "w");
+ fwrite (img, img_size, 1, fp);
+ fclose (fp);
+ g_free (file_name);
+ }
+
+ /* Register the image with GDB */
+
+ entry = g_malloc (sizeof (struct jit_code_entry));
+
+ entry->symfile_addr = (const char*)img;
+ entry->symfile_size = img_size;
+
+ entry->next_entry = __jit_debug_descriptor.first_entry;
+ if (__jit_debug_descriptor.first_entry)
+ __jit_debug_descriptor.first_entry->prev_entry = entry;
+ __jit_debug_descriptor.first_entry = entry;
+
+ __jit_debug_descriptor.relevant_entry = entry;
+ __jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
+
+ __jit_debug_register_code ();
+}
+
+/*
+ * mono_xdebug_flush:
+ *
+ * This could be called from inside gdb to flush the debugging information not yet
+ * registered with gdb.
+ */
+void
+mono_xdebug_flush (void)
+{
+ if (xdebug_w)
+ xdebug_end_emit (xdebug_w, xdebug_writer, NULL);
+
+ xdebug_begin_emit (&xdebug_w, &xdebug_writer);
+}
+
+static int xdebug_method_count;
+
+/*
+ * mono_save_xdebug_info:
+ *
+ * Emit debugging info for METHOD into an assembly file which can be assembled
+ * and loaded into gdb to provide debugging info for JITted code.
+ * LOCKING: Acquires the loader lock.
+ */
+void
+mono_save_xdebug_info (MonoCompile *cfg)
+{
+ if (use_gdb_interface) {
+ mono_loader_lock ();
+
+ if (!xdebug_syms)
+ xdebug_syms = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
+
+ /*
+ * gdb is not designed to handle 1000s of symbol files (one per method). So we
+ * group them into groups of 100.
+ */
+ if ((xdebug_method_count % 100) == 0)
+ mono_xdebug_flush ();
+
+ xdebug_method_count ++;
+
+ mono_dwarf_writer_emit_method (xdebug_writer, cfg, cfg->jit_info->method, NULL, NULL, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->method, mono_domain_get ()));
+
+#if 0
+ /*
+ * Emit a symbol for the code by emitting it at the beginning of the text
+ * segment, and setting the text segment to have an absolute address.
+ * This symbol can be used to set breakpoints in gdb.
+ * FIXME: This doesn't work when multiple methods are emitted into the same file.
+ */
+ sym = get_debug_sym (cfg->jit_info->method, "", xdebug_syms);
+ img_writer_emit_section_change (w, ".text", 0);
+ if (!xdebug_text_addr) {
+ xdebug_text_addr = cfg->jit_info->code_start;
+ img_writer_set_section_addr (w, (gssize)xdebug_text_addr);
+ }
+ img_writer_emit_global_with_size (w, sym, cfg->jit_info->code_size, TRUE);
+ img_writer_emit_label (w, sym);
+ img_writer_emit_bytes (w, cfg->jit_info->code_start, cfg->jit_info->code_size);
+ g_free (sym);
+#endif
+
+ mono_loader_unlock ();
+ } else {
+ if (!xdebug_writer)
+ return;
+
+ mono_loader_lock ();
+ mono_dwarf_writer_emit_method (xdebug_writer, cfg, cfg->jit_info->method, NULL, NULL, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->method, mono_domain_get ()));
+ fflush (xdebug_fp);
+ mono_loader_unlock ();
+ }
+}
+
+/*
+ * mono_save_trampoline_xdebug_info:
+ *
+ * Same as mono_save_xdebug_info, but for trampolines.
+ * LOCKING: Acquires the loader lock.
+ */
+void
+mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
+{
+ if (use_gdb_interface) {
+ MonoImageWriter *w;
+ MonoDwarfWriter *dw;
+
+ mono_loader_lock ();
+
+ xdebug_begin_emit (&w, &dw);
+
+ mono_dwarf_writer_emit_trampoline (dw, tramp_name, NULL, NULL, code, code_size, unwind_info);
+
+ xdebug_end_emit (w, dw, NULL);
+
+ mono_loader_unlock ();
+ } else {
+ if (!xdebug_writer)
+ return;
+
+ mono_loader_lock ();
+ mono_dwarf_writer_emit_trampoline (xdebug_writer, tramp_name, NULL, NULL, code, code_size, unwind_info);
+ fflush (xdebug_fp);
+ mono_loader_unlock ();
+ }
+}
+
+#else /* !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
+
+void
+mono_xdebug_init (char *options)
+{
+}
+
+void
+mono_save_xdebug_info (MonoCompile *cfg)
+{
+}
+
+void
+mono_save_trampoline_xdebug_info (const char *tramp_name, guint8 *code, guint32 code_size, GSList *unwind_info)
+{
+}
+
+#endif
projects / mono.git / commitdiff