+++ /dev/null
-#include "defs.h"
-#include "gdbcmd.h"
-#include "symtab.h"
-#include "value.h"
-#include "frame.h"
-#include "breakpoint.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "gmagic.h"
-#include <ctype.h>
-#include <string.h>
-
-#ifdef DYNAMIC_COMMAND_SUPPORT
-#include <dlfcn.h>
-#endif
-
-#ifdef ANSI_PROTOTYPES
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
-
-
-/* Maximum number of bytes of extra data to print, or UINT_MAX for no limit.
- Note that "set extra-data-max 0" stores UINT_MAX in extra_data_max, which
- displays in a show command as "unlimited." */
-
-static unsigned int extra_data_max;
-#define EXTRA_DATA_MAX_DEFAULT 1024
-
-/* Return the number of elements in ARRAY. */
-
-#define ARRAY_NELEMENTS(array) (sizeof (array) / sizeof (array[0]))
-
-/* Basic information about a text label */
-
-struct text_label
-{
- char *name; /* label name */
- CORE_ADDR addr; /* label value or 0 if label not found */
-};
-
-/* Labels within the Magic Cap dispatcher that we need to know about
- in order to implement "magic stepping" (that is, stepping over
- Magic Cap method dispatches). The label addresses are refreshed
- whenever a new symbol table is loaded. */
-
-struct text_label dispatch_labels[] =
-{
- {"__DispatchMethod", 0}, /* normal dispatch entry point */
- {"__DispatchInherited", 0}, /* inherited dispatch entry point */
- {"__DispatchDelegated", 0}, /* delegated dispatch entry point */
- {"__DispatchIntrinsic", 0}, /* intrinsic dispatch entry point */
- {"__DoDispatchMethodBpSite", 0}, /* do dispatch site */
-};
-
-/* Accessors for the array above. */
-
-#define DISPATCH_METHOD_ADDR dispatch_labels[0].addr
-#define DISPATCH_INHERITED_ADDR dispatch_labels[1].addr
-#define DISPATCH_DELEGATED_ADDR dispatch_labels[2].addr
-#define DISPATCH_INTRINSIC_ADDR dispatch_labels[3].addr
-#define DO_DISPATCH_METHOD_ADDR dispatch_labels[4].addr
-
-/* Cached value objects describing functions in the target program that
- we call frequently. These are refreshed whenever a new symbol table
- is loaded. */
-
-static value_ptr remote_get_class_name_val;
-static value_ptr remote_get_base_ptr_val;
-
-/* Nonzero means that "magic step" (stepping through the Magic Cap method
- dispatcher to the dispatch target) is enabled. */
-
-static int magic_step_enabled;
-
-/* function prototypes */
-
-static void
-print_object PARAMS ((char *args, int dump));
-
-static void
-get_class_name PARAMS ((unsigned long objectID, char **name, int *is_scripted));
-
-static CORE_ADDR
-get_base_ptr PARAMS ((unsigned long objectID));
-
-static int
-should_dump_extra_data PARAMS ((char *class_name));
-
-static void
-dump_extra_data PARAMS ((CORE_ADDR addr, unsigned long length));
-
-static value_ptr
-call_function_by_name PARAMS ((char *function_name, int nargs, ...));
-
-static value_ptr
-call_function_by_value PARAMS ((value_ptr function_value, int nargs, ...));
-
-static value_ptr
-vcall_function_by_value PARAMS ((value_ptr function_value, int nargs,
- va_list args));
-static void
-local_shell_escape PARAMS ((char *arg));
-
-static CORE_ADDR
-lookup_text_label PARAMS ((char *name, value_ptr *val_ptrptr));
-
-static int
-is_dispatcher_entry PARAMS ((CORE_ADDR pc));
-
-static int
-is_dispatcher_exit PARAMS ((CORE_ADDR pc));
-
-
-/* This is the GDB handler for the "dobj" command, which prints a
- verbose description of an object. ARGS is a string containing an
- expression for the object ID, and FROM_TTY is nonzero if the
- command was issued interactively. */
-
-/* ARGSUSED */
-static void
-dobj_command (args, from_tty)
- char *args;
- int from_tty;
-{
- if (remote_get_class_name_val == NULL)
- error ("This version of Magic Cap lacks the runtime support for \"dobj\".");
-
- print_object (args, 1);
-}
-
-/* This is the GDB handler for the "pobj" command, which prints a
- brief description of an object. ARGS is a string containing an
- expression for the object ID, and FROM_TTY is nonzero if the
- command was issued interactively. */
-
-/* ARGSUSED */
-static void
-pobj_command (args, from_tty)
- char *args;
- int from_tty;
-{
- if (remote_get_class_name_val == NULL)
- error ("This version of Magic Cap lacks the runtime support for \"pobj\".");
-
- print_object (args, 0);
-}
-
-/* This is the GDB handler for the "cdump" command, which prints a
- description of a cluster. ARGS is a string containing a cluster
- selector, and FROM_TTY is nonzero if the command was issued
- interactively.
-
- cdump <contextSlot> [/l[ocked]] [/s[tartAddr] <expr>]
- [/c[lass] <className> | <classNumber>] */
-
-/* ARGSUSED */
-static void
-cdump_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char *token;
- unsigned long cluster;
- CORE_ADDR min_object;
- long display_only_locked;
- long filter_classes;
- long display_only_class_number;
- char *display_only_class_name;
-
- if (args == NULL)
- error_no_arg ("expression for context slot to dump");
-
- token = strtok (args, " \t");
- if (token[0] == '/')
- error ("The first argument to cdump must be an expression for the context slot to dump.");
-
- cluster = parse_and_eval_address (token);
-
- /* Initialize option values. Note that we assume that
- sizeof (long) == sizeof (void *) here, in that we pass
- min_object as a long, even though it is a pointer. */
-
- min_object = 0;
- display_only_locked = 0;
- filter_classes = 0;
- display_only_class_name = NULL;
- display_only_class_number = 0;
-
- while ((token = strtok (NULL, " \t")) != NULL)
- {
- if (token[0] != '/')
- goto bad_option;
-
- switch (token[1])
- {
- case 'l':
- if (token[2] && strcmp (token + 1, "locked"))
- goto bad_option;
-
- display_only_locked = 1;
- break;
-
- case 's':
- if (token[2] && strcmp (token + 1, "startAddr"))
- goto bad_option;
-
- if ((token = strtok (NULL, " \t")) == NULL)
- error ("Missing start address expression for `/s' option.");
-
- min_object = parse_and_eval_address (token);
- break;
-
- case 'c':
- if (token[2] && strcmp (token + 1, "class"))
- goto bad_option;
-
- if ((token = strtok (NULL, " \t")) == NULL)
- error ("Missing class name or number for `/c' option.");
-
- filter_classes = 1;
- if (isdigit (token[0]))
- display_only_class_number = parse_and_eval_address (token);
- else
- display_only_class_name = token;
-
- break;
-
- default:
- goto bad_option;
- }
- }
-
- if (display_only_class_name != NULL)
- error ("Sorry, `/c <className>' isn't supported yet.");
-
- (void)call_function_by_name ("cdump", 6, cluster, min_object,
- display_only_locked,
- filter_classes, display_only_class_number,
- display_only_class_name);
- return;
-
-bad_option:
- error ("Invalid option: `%s'.", token);
-}
-
-/* This is the GDB handler for the "esc" command, which lists the
- exception handlers for a given actor. ARGS is a string containing
- an expression for the objectID of the actor in question, and FROM_TTY
- is nonzero if the command was issued interactively. */
-
-/* ARGSUSED */
-static void
-esc_command (args, from_tty)
- char *args;
- int from_tty;
-{
- unsigned long object;
-
- if (args == NULL)
- error_no_arg ("expression for actor's object ID");
-
- object = parse_and_eval_address (args);
- (void)call_function_by_name ("esc", 1, object);
-}
-
-/* This is the GDB handler for the "cnum" command, which converts
- a class number to a class name. ARGS is a string containing an
- expression for the class number, and FROM_TTY is nonzero if the
- command was issued interactively. */
-
-/* ARGSUSED */
-static void
-cnum_command (args, from_tty)
- char *args;
- int from_tty;
-{
- unsigned long cnum;
-
- if (args == NULL)
- error_no_arg ("expression for class number");
-
- cnum = parse_and_eval_address (args);
- (void)call_function_by_name ("cnum", 1, cnum);
-}
-
-/* This is the GDB handler for the "getint" command, which converts an
- intrinsic operation number to the corresponding intrinsic operation name,
- or vice-versa. ARGS is a string containing the intrinsic number or name,
- and FROM_TTY is nonzero if the command was issued interactively. */
-
-/* ARGSUSED */
-static void
-getint_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char shell_command[256];
-
- if (args == NULL)
- error_no_arg ("intrinsic operation number or name");
-
- if (isdigit (args[0]))
- sprintf (shell_command, "getint %ld", parse_and_eval_address (args));
- else
- sprintf (shell_command, "getint %s", args);
-
- local_shell_escape (shell_command);
-}
-
-/* This is the GDB handler for the "getop" command, which converts an
- operation number to the corresponding operation name, or vice-versa.
- ARGS is a string containing the operation number or name, and FROM_TTY
- is nonzero if the command was issued interactively. */
-
-/* ARGSUSED */
-static void
-getop_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char shell_command[256];
- CORE_ADDR op_number;
-
- if (args == NULL)
- error_no_arg ("operation number or name");
-
- if (isdigit (args[0]))
- sprintf (shell_command, "getop %ld", parse_and_eval_address (args));
- else
- sprintf (shell_command, "getop %s", args);
-
- local_shell_escape (shell_command);
-}
-
-/* This is the GDB handler for the "getindexical" command, which converts
- an indexical number to the corresponding indexical name, or vice-versa.
- ARGS is a string containing the indexical number or name, and FROM_TTY
- is nonzero if the command was issued interactively. */
-
-/* ARGSUSED */
-static void
-getindexical_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char shell_command[256];
-
- if (args == NULL)
- error_no_arg ("indexical number or name");
-
- if (isdigit (args[0]))
- sprintf (shell_command, "getindexical 0x%lx",
- parse_and_eval_address (args));
- else
- sprintf (shell_command, "getindexical %s", args);
-
- local_shell_escape (shell_command);
-}
-
-/* This is the GDB handler for the "exc" command, which converts an
- exception number to the corresponding exception name, or vice-versa.
- ARGS is a string containing the exception number or name, and FROM_TTY
- is nonzero if the command was issued interactively.
-
- FIXME why is this one "exc" instead of "getexc?" (inconsistent naming). */
-
-/* ARGSUSED */
-static void
-exc_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char shell_command[256];
-
- if (args == NULL)
- error_no_arg ("exception number or name");
-
- if (isdigit (args[0]))
- sprintf (shell_command, "getexc %ld", parse_and_eval_address (args));
- else
- sprintf (shell_command, "getexc %s", args);
-
- local_shell_escape (shell_command);
-}
-
-#ifdef DYNAMIC_COMMAND_SUPPORT
-/* Open a dynamic library and invoke an entry point within it.
- ARGS is a string containing the names of the dynamic library
- and the symbolic entry point, separated by whitespace. */
-
-/* ARGSUSED */
-static void
-dlopen_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char *p;
- void *hdl;
- void (*sym)();
-
- if (args == 0)
- {
- error ("No arguments specified.");
- return;
- }
-
- p = args;
- while (*p != ' ' && *p != '\0')
- p++;
-
- if (*p != ' ')
- {
- error ("Not enough arguments.");
- return;
- }
- *p++ = '\0';
-
- hdl = dlopen (args, RTLD_NOW);
- if (hdl == NULL)
- {
- fprintf (stderr, "%s: %s\n", args, dlerror ());
- return;
- }
-
- sym = dlsym (hdl, p);
- if (sym == NULL)
- {
- fprintf (stderr, "%s: %s\n", p, dlerror ());
- return;
- }
-
- sym();
-}
-#endif /* DYNAMIC_COMMAND_SUPPORT */
-
-/* Given an object ID OBJECT, return a pointer to a type structure
- representing the GDB type that describes the layout of the object's
- fields in memory (i.e., the "_AllFields" structure corresponding
- to the object's class). */
-
-struct type *
-type_of_object (object)
- CORE_ADDR object;
-{
- char *class_name = NULL;
- char classAllFieldsName[128];
- struct type *type = NULL;
- int is_scripted;
-
- get_class_name (object, &class_name, &is_scripted);
- sprintf (classAllFieldsName, "%s_AllFields", class_name);
- free (class_name);
-
- type = lookup_typename (classAllFieldsName, (struct block *)NULL, 0);
- return lookup_pointer_type (type);
-}
-
-/* Given OBJECT, an object ID, return the address of the object's
- fixed fields. */
-
-CORE_ADDR
-baseptr_of_object (object)
- unsigned long object;
-{
- return get_base_ptr (object) + kSizeOfObjectHeader;
-}
-
-/* Given an expression for an object ID, ARGS, print information about
- the object--including its class, the values of its fixed fields, and
- the values in its extra data block. */
-
-/* ARGSUSED */
-static void
-print_object (args, dump)
- char *args;
- int dump;
-{
- CORE_ADDR addr;
- unsigned long object, object_length;
- char *class_name = NULL;
- char class_all_fields_name[128];
- struct type *type;
- int is_scripted;
- struct cleanup *old_chain;
-
- if (args == NULL)
- error_no_arg ("expression for object ID");
-
- object = parse_and_eval_address (args);
-
- /* check for nilObject */
-
- if (!object)
- {
- printf_filtered ("\"%s\" evaluates to nilObject.\n", args);
- return;
- }
-
- /* allow shortcut for system object ids */
-
- if (IsObjectID (object))
- object |= 1 << kIDBitUsable;
- else if (object < 0x5000)
- object |= (1 << kIDBitObject) | (1 << kIDBitUsable); /* 0x84000000 */
-
- /* Get the name of the object's class, as well as the GDB type that
- describes the layout of the object's fixed fields. */
-
- get_class_name (object, &class_name, &is_scripted);
- old_chain = make_cleanup (free_current_contents, &class_name);
-
- sprintf (class_all_fields_name, "%s_AllFields", class_name);
- type = lookup_typename (class_all_fields_name, (struct block *)NULL, 1);
-
- /* Get pointer to object's fields.
- FIXME: ADDR is actually an (ObjectHeader *); should use normal expression
- evaluator to extract the length member, rather than hardwiring the
- format of the structure in this code. */
-
- addr = get_base_ptr (object);
- object_length = read_memory_unsigned_integer (addr, 4);
- object_length -= kSizeOfObjectHeader;
- addr += kSizeOfObjectHeader;
-
- if (type == NULL || (TYPE_CODE (type) != TYPE_CODE_UNDEF
- && !(TYPE_FLAGS (type) & TYPE_FLAG_STUB)))
- {
- if (dump)
- {
- unsigned long fixed_length;
-
- printf_filtered ("Object 0x%08lx%s at address 0x%08lx of class %s\n",
- object, (is_scripted) ? " (scripted)" : "",
- addr, class_name);
-
- /* If the object has fixed fields, dump them. */
-
- if (type != NULL)
- {
- value_ptr valptr = value_at_lazy (type, addr);
- int histindex = record_latest_value (valptr);
-
- if (histindex >= 0)
- printf_filtered ("$%d = ", histindex);
-
- value_print (valptr, gdb_stdout, 0, Val_prettyprint);
- puts_filtered ("\n");
- fixed_length = TYPE_LENGTH (type);
- }
- else
- fixed_length = 0;
-
- /* If the object's length is less than that of its fixed fields,
- warn the user. */
-
- if (object_length < fixed_length)
- {
- error ("Warning: object is too small (should be at least %d bytes, is %d bytes).",
- fixed_length, object_length);
- }
-
- /* Dump the object's extra data, if any. should_dump_extra_data ()
- filters out classes (e.g. Cluster) that have too much extra data
- to be dumped usefully in this format. */
-
- if (should_dump_extra_data (class_name))
- {
- dump_extra_data (addr + fixed_length,
- object_length - fixed_length);
- }
- }
- else
- {
- struct type *pointer_type;
- value_ptr valptr;
- int histindex;
-
- pointer_type = lookup_pointer_type ((type == NULL) ?
- builtin_type_void : type);
- valptr = value_from_longest (pointer_type, addr);
-
- histindex = record_latest_value (valptr);
- if (histindex >= 0)
- printf_filtered ("$%d = ", histindex);
-
- value_print (valptr, gdb_stdout, 0, Val_prettyprint);
- puts_filtered ("\n");
- }
- }
- do_cleanups (old_chain);
-}
-
-/* Get the name of the class of the object referenced by OBJECTID.
- *NAME is set to a pointer to the string containing the class
- name; it is the caller's responsibility to free the memory for
- the string. *IS_SCRIPTED is set to nonzero if the object is
- scripted, zero otherwise. */
-
-static void
-get_class_name (objectID, name, is_scripted)
- unsigned long objectID;
- char **name;
- int *is_scripted;
-{
- value_ptr val;
- int errno_val;
-
- val = call_function_by_value (remote_get_class_name_val, 1, objectID);
-
- /* As RemoteGetClassName() is currently (9/21/95) written, an empty string,
- rather than a nil pointer, is returned upon failure. I'm leaving the
- value_logical_not test in anyway, though, just for added robustness. */
-
- if (!value_logical_not (val))
- {
- (void)target_read_string (value_as_pointer (val), name, 256, &errno_val);
- if (errno_val)
- error ("Can't read class name for object 0x%08lx.", objectID);
-
- if (**name)
- {
- char *scripted_suffix;
-
- if ((scripted_suffix = strstr (*name, " (scripted)")) != NULL)
- {
- *scripted_suffix = '\0';
- *is_scripted = 1;
- }
- else
- *is_scripted = 0;
-
- return;
- }
- else
- free (*name);
- }
-
- error ("Bad object ID: 0x%08lx.", objectID);
-}
-
-/* Given an object ID, return a pointer to the object's data. */
-
-static CORE_ADDR
-get_base_ptr (objectID)
- unsigned long objectID;
-{
- register value_ptr val;
-
- val = call_function_by_value (remote_get_base_ptr_val, 1, objectID);
-
- if (value_logical_not (val))
- error ("Could not get base pointer to object.");
-
- return value_as_pointer (val);
-}
-
-/* Return nonzero if we should dump the extra data for an object
- of class CLASS_NAME.
-
- FIXME this only works for explicitly named classes, and doesn't
- handle subclasses. */
-
-static int
-should_dump_extra_data (class_name)
- char *class_name;
-{
- int i;
- char **name;
- static char *dont_dump_extra_classes[] =
- {
- "Cluster"
- };
-
- for (i = 0, name = dont_dump_extra_classes;
- i < ARRAY_NELEMENTS(dont_dump_extra_classes);
- i++, name++)
- {
- if (!strcmp (class_name, *name))
- return 0;
- }
-
- return 1;
-}
-
-/* Given ADDR, the address of an object's extra data block, and LENGTH,
- the length of that block in bytes, dump the object's extra data to
- standard output. */
-
-static void
-dump_extra_data (addr, length)
- CORE_ADDR addr;
- unsigned long length;
-{
- unsigned long buf[5];
- int chunk;
- int chunk_longs;
- int i;
- int bytes_printed;
- char *p;
-
- bytes_printed = 0;
-
- while (length > 3 && bytes_printed < extra_data_max)
- {
- QUIT; /* allow user to interrupt dump */
-
- /* read a chunk of extra data */
-
- chunk = (length > 16) ? 16 : length;
- memset (buf, 0, sizeof (buf));
- read_memory (addr, (char *) &buf, chunk);
-
- /* format data as hex longwords */
-
- chunk_longs = chunk >> 2;
- for (i = 0; i < chunk_longs; i++)
- printf_filtered ("%08lx ",
- extract_unsigned_integer (buf + i, sizeof (long)));
-
- /* pad to 4 longs */
-
- for (i = chunk_longs; i < 4; i++)
- puts_filtered (" ");
-
- puts_filtered ("| ");
-
- /* format data as ascii bytes */
-
- for (i = 0, p = (char*)buf; i < chunk; i++, p++)
- {
- if (!isprint (*p))
- *p = '.';
- }
- printf_filtered ("%s |\n", buf);
-
- addr += chunk;
- length -= chunk;
- bytes_printed += chunk;
- }
-
- if (length > 0)
- printf_filtered ("(%d bytes of extra data remaining but not displayed.)\n",
- length);
-}
-
-/* Given the name of a function in the target program and a list of
- long arguments, call the function and return a pointer to a value
- object describing the function's return value. NAME is a string
- containing the name of the function to be called; NARGS is the
- number of arguments to the function; and the remaining parameters
- are the arguments to passed to the function, all assumed to be of
- type long. */
-
-static value_ptr
-#ifdef ANSI_PROTOTYPES
-call_function_by_name (char *function_name, int nargs, ...)
-#else
-call_function_by_name (va_alist)
- va_dcl
-#endif
-{
- va_list args;
- value_ptr return_value;
- value_ptr function_value;
-#ifndef ANSI_PROTOTYPES
- char *function_name;
- int nargs;
-
- va_start (args);
- function_name = va_arg (args, char *);
- nargs = va_arg (args, int);
-#else
- va_start (args, nargs);
-#endif
-
- /* Find the address of function NAME in the inferior. */
-
- if (!lookup_text_label (function_name, &function_value))
- error ("Execution of this command requires the debugged program to have a function \"%s.\"",
- function_name);
-
- /* Call the function. */
-
- return_value = vcall_function_by_value (function_value, nargs, args);
- va_end (args);
-
- return return_value;
-}
-
-/* Given a value object describing a function in the target program and
- a list of long arguments, call the function and return a pointer to a
- value object describing the function's return value. FUNCTION_VALUE
- is a pointer to a value struct describing the function; NARGS is the
- number of arguments to the function; and the remaining parameters are
- the arguments to passed to the function, all assumed to be of type long. */
-
-static value_ptr
-#ifdef ANSI_PROTOTYPES
-call_function_by_value (value_ptr function_value, int nargs, ...)
-#else
-call_function_by_value (va_alist)
- va_dcl
-#endif
-{
- va_list args;
- value_ptr return_value;
-#ifndef ANSI_PROTOTYPES
- value_ptr function_value;
- int nargs;
-
- va_start (args);
- function_value = va_arg (args, value_ptr);
- nargs = va_arg (args, int);
-#else
- va_start (args, nargs);
-#endif
-
- /* Call the function and return its return value. */
-
- return_value = vcall_function_by_value (function_value, nargs, args);
- va_end (args);
-
- return return_value;
-}
-
-/* Helper routine for call_function_by_name and call_function_by_value
- above. This function does the work of collecting the function
- arguments into an array of value objects, and then invoking
- call_function_by_hand to do the real work. FUNCTION_VALUE is a
- pointer to a value object describing the function to be called,
- NARGS is the number of arguments to the function, and ARGS is a
- list (va_list) of the arguments to the function, all assumed to
- be of type long.
-
- Returns a pointer to a value object describing the return value
- of the function. */
-
-static value_ptr
-vcall_function_by_value (function_value, nargs, args)
- value_ptr function_value;
- int nargs;
- va_list args;
-{
- value_ptr *arg_values;
- value_ptr return_value;
- struct cleanup *old_chain;
- int i;
-
- /* Construct a vector of value objects describing the arguments
- to the function to be called. */
-
- arg_values = (value_ptr *) xmalloc (nargs * sizeof (value_ptr));
- old_chain = make_cleanup (free_current_contents, &arg_values);
-
- for (i = 0; i < nargs; i++)
- arg_values[i] = value_from_longest (builtin_type_long,
- (LONGEST) va_arg (args, unsigned long));
-
- /* Call the function and return its return value. */
-
- return_value = call_function_by_hand (function_value, nargs, arg_values);
- do_cleanups (old_chain);
- return return_value;
-}
-
-/* Invoke a shell, supplying ARG as the command to be executed. */
-
-static void
-local_shell_escape (arg)
- char *arg;
-{
-#ifdef CANT_FORK
- /* FIXME: what about errors (I don't know how GO32 system() handles
- them)? */
- system (arg);
-#else /* Can fork. */
- int rc, status, pid;
- char *p, *user_shell;
-
- if ((user_shell = (char *) getenv ("SHELL")) == NULL)
- user_shell = "/bin/sh";
-
- /* Get the name of the shell for arg0 */
- if ((p = strrchr (user_shell, '/')) == NULL)
- p = user_shell;
- else
- p++; /* Get past '/' */
-
- if ((pid = fork()) == 0)
- {
- if (!arg)
- execl (user_shell, p, 0);
- else
- execl (user_shell, p, "-c", arg, 0);
-
- fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell,
- safe_strerror (errno));
- gdb_flush (gdb_stderr);
- _exit (0177);
- }
-
- if (pid != -1)
- while ((rc = wait (&status)) != pid && rc != -1)
- ;
- else
- error ("Fork failed");
-#endif /* Can fork. */
-}
-
-/* Lookup NAME as a text label in the target program. If NAME is the
- name of a function, and VAL_PTRPTR is not NULL, a pointer to a value
- object describing the function is stored at VAL_PTRPTR.
-
- Returns the text address to which the label refers, or 0 if the
- label is not found in the target program. */
-
-static CORE_ADDR
-lookup_text_label (name, val_ptrptr)
- char *name;
- value_ptr *val_ptrptr;
-{
- struct symbol *sym;
- CORE_ADDR addr;
-
- addr = 0;
-
- /* Try looking up NAME as a first-class symbol. */
-
- sym = lookup_symbol (name, 0, VAR_NAMESPACE, 0, NULL);
- if (sym != NULL)
- {
- switch (SYMBOL_CLASS (sym))
- {
- case LOC_BLOCK:
- addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
- if (val_ptrptr != NULL)
- *val_ptrptr = value_of_variable (sym, NULL);
-
- break;
-
- case LOC_STATIC:
- case LOC_LABEL:
- addr = SYMBOL_VALUE_ADDRESS (sym);
- break;
- }
- }
- else
- {
- struct minimal_symbol *msymbol;
- struct type *type;
-
- /* Try to find a minimal symbol for NAME. */
-
- msymbol = lookup_minimal_symbol (name, "", (struct objfile *) NULL);
- if (msymbol != NULL)
- {
- addr = SYMBOL_VALUE_ADDRESS (msymbol);
- if (val_ptrptr != NULL)
- {
- type = lookup_pointer_type (builtin_type_char);
- type = lookup_function_type (type);
- type = lookup_pointer_type (type);
- *val_ptrptr = value_from_longest (type, addr);
- }
- }
- }
- return addr;
-}
-
-/* The following two routines adapt GDB's framework for stepping over
- shared library trampoline code to the problem of stepping over the
- Magic Cap method dispatcher. While the method dispatcher is not a
- shared library trampoline, we can use the interfaces for controlling
- stepping over trampolines to do what we want. */
-
-/* Return nonzero if STOP_PC is within the Magic Cap method dispatcher.
- NAME is unused. This function serves as the implementation of both
- IN_SOLIB_CALL_TRAMPOLINE() and IN_SOLIB_RETURN_TRAMPOLINE() when GDB
- is configured to target Magic Cap. We don't need to distinguish
- between the two types of trampolines (because they're not really
- trampolines); we just need to tell GDB to set a breakpoint at the
- site of the next "hop" on our way through the dispatcher, and to
- keep going. */
-
-int
-magic_in_dispatcher (stop_pc, name)
- CORE_ADDR stop_pc;
- char *name;
-{
- return magic_step_enabled
- && (is_dispatcher_entry (stop_pc) || is_dispatcher_exit (stop_pc));
-}
-
-/* Determine if STOP_PC is an address within the Magic Cap method
- dispatcher, and if so, return the address at which GDB should set
- a step resume breakpoint in order to skip over the dispatcher code.
- In fact, we have to skip over the dispatcher in two separate "hops:"
- the first hop gets us from a dispatcher entry point to the dispatcher
- exit site; the second hop gets us from this exit site to the first
- instruction of the method.
-
- This function serves as the implementation of SKIP_TRAMPOLINE_CODE()
- when GDB is configured to target Magic Cap. */
-
-CORE_ADDR
-magic_skip_dispatcher (stop_pc)
- CORE_ADDR stop_pc;
-{
- /* If magic stepping is disabled, return 0, indicating that GDB should
- process this step event normally. This will have the effect of
- allowing the user to step through the dispatcher code itself. */
-
- if (!magic_step_enabled)
- return 0;
-
- /* If the program is stopped at an entry point to the dispatcher,
- tell GDB to set a breakpoint at a well-known label in the
- dispatcher where we will be able to determine the address of
- the method to which we are dispatching. Note that the dispatcher
- has hair to ensure that the code at this label is executed when we
- are completing a top-level dispatch; recursive dispatches generated
- from within the dispatcher do not exit through this code. */
-
- if (is_dispatcher_entry (stop_pc))
- return DO_DISPATCH_METHOD_ADDR;
-
- /* If we have hit the breakpoint set previously at a dispatcher exit site,
- determine the method address and tell GDB to set a breakpoint there. */
-
- else if (is_dispatcher_exit (stop_pc))
- return read_register (14); /* assumes that we branch through t6 */
- else
- return 0;
-}
-
-/* Return nonzero if PC is an entry point to the Magic Cap method
- dispatcher. */
-
-static int
-is_dispatcher_entry (pc)
- CORE_ADDR pc;
-{
- return pc == DISPATCH_METHOD_ADDR
- || pc == DISPATCH_INTRINSIC_ADDR
- || pc == DISPATCH_INHERITED_ADDR
- || pc == DISPATCH_DELEGATED_ADDR;
-}
-
-/* Return nonzero if PC is an exit site from the Magic Cap method
- dispatcher. */
-
-static int
-is_dispatcher_exit (pc)
- CORE_ADDR pc;
-{
- return pc == DO_DISPATCH_METHOD_ADDR;
-}
-
-/* Store away addresses in the inferior we need to control single-stepping
- through Magic Cap method dispatches, as well as other addresses of
- interest in Magic Cap. */
-
-void
-init_magic ()
-{
- struct text_label *label;
- int i;
-
- /* Cache method dispatch label addresses. */
-
- for (i = 0, label = dispatch_labels;
- i < ARRAY_NELEMENTS (dispatch_labels);
- i++, label++)
- {
- if (!(label->addr = lookup_text_label (label->name, NULL)))
- {
- /* If we can't find all of the dispatcher addresses, don't attempt
- to do magic stepping. */
-
- magic_step_enabled = 0;
- break;
- }
- }
-
- /* Cache value objects for RemoteGetClassName () and RemoteGetBasePtr (),
- which are used to implement the "dobj" and "pobj" commands. Note that
- we must call release_value () on these values to prevent GDB from freeing
- them automatically. */
-
- if (remote_get_class_name_val != NULL)
- {
- value_free (remote_get_class_name_val);
- remote_get_class_name_val = NULL;
- }
-
- if (remote_get_base_ptr_val != NULL)
- {
- value_free (remote_get_base_ptr_val);
- remote_get_base_ptr_val = NULL;
- }
-
- if (lookup_text_label ("RemoteGetClassName", &remote_get_class_name_val))
- {
- release_value (remote_get_class_name_val);
-
- if (lookup_text_label ("RemoteGetBasePtr", &remote_get_base_ptr_val))
- release_value (remote_get_base_ptr_val);
- }
-}
-
-/* Hook routine called when an inferior (i.e., debugged) process is
- created. */
-
-void
-magic_create_inferior_hook ()
-{
- struct symbol *sym = lookup_symbol ("gHandleError", NULL, VAR_NAMESPACE,
- NULL, NULL);
- if (sym)
- {
- CORE_ADDR addr = SYMBOL_VALUE (sym);
- unsigned long errorDebugger = 2;
-
- target_write_memory (addr, (char *) &errorDebugger, 4);
- }
-}
-
-/* Initialization routine for magic.c. This is where we define debugger
- commands specific to Magic Cap. */
-
-void
-_initialize_magic ()
-{
- add_com ("dobj", class_support, dobj_command,
- "Display object contents.\n\
-Usage: dobj <objectID>\n\
-Where: <objectID> is an expression for the object ID to dump.");
-
- add_com ("pobj", class_support, pobj_command,
- "Print object base pointer.\n\
-Usage: pobj <objectID>\n\
-Where: <objectID> is an expression for the object ID to examine.");
-
- add_com ("cdump", class_support, cdump_command,
- concat ("Display the contents of a cluster.\n\
-Usage: cdump <contextSlot> [/l[ocked]] [/s[tartAddr] <addr>]\n\
- [/c[lass] <classNumber>]\n\
-Where: <contextSlot> is an expression describing the cluster to dump;\n\
- if <contextSlot> is a number between 0x8 and 0xf, it is \n\
- interpreted as the high-order nibble of an object ID\n\
- belonging to the cluster to dump, with the second highest-\n\
- order nibble assumed to be 0. (For example, \"cdump 8\" and \n\
- \"cdump 0xa\" dump the System Persistent and Persistent RAM\n\
- clusters, respectively.)\n",
- "\n\
- if <contextSlot> is a number between 0xf0 and 0x100, it is\n\
- interpreted as the high-order byte of an object ID belonging to\n\
- the cluster to dump. (For example, \"cdump 0x88\" and \n\
- \"cdump 0xa8\" dump the Locked Persistent and Transient RAM\n\
- clusters, respectively.)\n",
- "\n\
- /locked or /l indicates that only locked objects are to be displayed.\n\
-\n\
- /startAddr or /s indicates that only objects whose base pointers are\n\
- greater than or equal to the address specified by the following\n\
- expression (<startAddr>) are to be displayed.\n\
-\n\
- /class or /c indicates that only objects of the class specified by\n\
- the following expression <classNumber> are to be displayed.",
- NULL));
-
- add_com ("esc", class_support, esc_command,
- "List all the exception handlers for a given actor.\n\
-Usage: esc <objectID>\n\
-Where: <objectID> is an expression for the object ID of the actor\n\
- whose exception handlers are to be listed.");
-
- add_com ("cnum", class_support, cnum_command,
- "Convert class number to name.\n\
-Usage: cnum <classNumber>\n\
-Where: <classNumber> is an expression for the class number to convert.");
-
- add_com ("getint", class_support, getint_command,
- "Convert intrinsic name to number or vice versa.\n\
-Usage: getint <intrinsicName> | <intrinsicNumber>\n\
-Where: <intrinsicName> | <intrinsicNumber> is an intrinsic operation name\n\
- to be converted to an operation number, or an intrinsic operation\n\
- number to be converted to an operation name.");
-
- add_com ("getop", class_support, getop_command,
- "Convert operation name to number or vice versa.\n\
-Usage: getop <operationName> | <operationNumber>\n\
-Where: <operationName> | <operationNumber> is an operation name to be\n\
- converted to an operation number, or an operation number to\n\
- be converted to an operation name.");
-
- add_com ("getindexical", class_support, getindexical_command,
- "Convert indexical name to number or vice versa.\n\
-Usage: getindexical <indexicalName> | <indexicalNumber>\n\
-Where: <indexicalName> | <indexicalNumber> is an indexical name to be\n\
- converted to an an indexical number, or an indexical number\n\
- to be converted to an indexical name.");
-
- add_com ("exc", class_support, exc_command,
- "Convert exception name to number or vice versa.\n\
-Usage: exc <exceptionName> | <exceptionNumber>\n\
-Where: <exceptionName> | <exceptionNumber> is an exception name to be\n\
- converted to an an exception number, or an exception number\n\
- to be converted to an exception name.");
-
- add_show_from_set
- (add_set_cmd ("extra-data-max", class_support, var_uinteger,
- (char *) &extra_data_max,
- "Set limit on number of bytes of extra data to print.\n\
-This command sets an upper limit on the number of bytes of extra\n\
-data displayed by the \"dobj\" command when dumping a Magic Cap\n\
-object. \"set extra-data-max 0\" causes there to be no limit.",
- &setlist),
- &showlist);
-
- extra_data_max = EXTRA_DATA_MAX_DEFAULT;
-
- add_show_from_set
- (add_set_cmd ("magic-step", class_support, var_boolean,
- (char *) &magic_step_enabled,
- "Set stepping over Magic Cap method dispatches.\n\
-When set to \"on\" (the default), issuing a \"step\" command at a Magic Cap\n\
-operation call site will cause the program to stop at the first line of\n\
-the corresponding method. Set this to \"off\" only if you need to debug\n\
-the dispatcher itself.",
- &setlist),
- &showlist);
-
- magic_step_enabled = 1;
-
-#ifdef DYNAMIC_COMMAND_SUPPORT
- add_com ("dlopen", class_support, dlopen_command,
- "Load the dynamic library specified and execute the specified symbol");
-#endif
-}
projects / deliverable / binutils-gdb.git / commitdiff
