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debug.c
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debug.c
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/*
Copyright (C) 2001-2011, Parrot Foundation.
=head1 NAME
src/debug.c - Parrot debugging
=head1 DESCRIPTION
This file implements Parrot debugging and is used by C<parrot_debugger>,
the Parrot debugger, and the C<debug> ops.
=head2 Functions
=over 4
=cut
*/
#include <stdio.h>
#include <stdlib.h>
#include "parrot/parrot.h"
#include "parrot/oplib.h"
#include "parrot/debugger.h"
#include "parrot/oplib/ops.h"
#include "pmc/pmc_key.h"
#include "parrot/runcore_api.h"
#include "parrot/runcore_trace.h"
#include "debug.str"
#include "pmc/pmc_continuation.h"
#include "pmc/pmc_callcontext.h"
#include "pmc/pmc_sub.h"
#include "parrot/oplib/core_ops.h"
/* Hand switched debugger tracing
* Set to 1 to enable tracing to stderr
* Set to 0 to disable
*/
#define TRACE_DEBUGGER 0
#if TRACE_DEBUGGER
# define TRACEDEB_MSG(msg) fprintf(stderr, "%s\n", (msg))
#else
# define TRACEDEB_MSG(msg)
#endif
/* Length of command line buffers */
#define DEBUG_CMD_BUFFER_LENGTH 255
/* Easier register access */
#define IREG(i) REG_INT(interp, (i))
#define NREG(i) REG_NUM(interp, (i))
#define SREG(i) REG_STR(interp, (i))
#define PREG(i) REG_PMC(interp, (i))
typedef struct DebuggerCmd DebuggerCmd;
typedef struct DebuggerCmdList DebuggerCmdList;
/* HEADERIZER HFILE: include/parrot/debugger.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void chop_newline(ARGMOD(char * buf))
__attribute__nonnull__(1)
FUNC_MODIFIES(* buf);
static void close_script_file(PARROT_INTERP)
__attribute__nonnull__(1);
static unsigned short condition_regtype(ARGIN(const char *cmd))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PDB_breakpoint_t * current_breakpoint(ARGIN(const PDB_t *pdb))
__attribute__nonnull__(1);
static void dbg_assign(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_break(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_continue(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_delete(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_disable(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_disassemble(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_echo(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_enable(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_eval(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_gcdebug(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_help(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_info(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_list(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_listbreakpoints(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_load(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_next(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_print(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_quit(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_run(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_script(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_stack(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_trace(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void dbg_watch(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void debugger_cmdline(PARROT_INTERP)
__attribute__nonnull__(1);
static void display_breakpoint(
ARGIN(const PDB_t *pdb),
ARGIN(const PDB_breakpoint_t *breakpoint))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_OBSERVER
static STRING * GDB_P(PARROT_INTERP, ARGIN(const char *s))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_OBSERVER
static STRING * GDB_print_reg(PARROT_INTERP, int t, int n)
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static const DebuggerCmd * get_cmd(ARGIN_NULLOK(const char **cmd));
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC * get_exception_context(PARROT_INTERP, ARGMOD(PMC * exception))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(* exception);
PARROT_WARN_UNUSED_RESULT
static unsigned long get_uint(ARGMOD(const char **cmd), unsigned int def)
__attribute__nonnull__(1)
FUNC_MODIFIES(*cmd);
PARROT_WARN_UNUSED_RESULT
static unsigned long get_ulong(ARGMOD(const char **cmd), unsigned long def)
__attribute__nonnull__(1)
FUNC_MODIFIES(*cmd);
static void list_breakpoints(ARGIN(const PDB_t *pdb))
__attribute__nonnull__(1);
static void no_such_register(PARROT_INTERP,
char register_type,
UINTVAL register_num)
__attribute__nonnull__(1);
static int nomoreargs(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING * PDB_get_continuation_backtrace(PARROT_INTERP,
ARGIN(PMC *ctx))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_PURE_FUNCTION
static const char * skip_whitespace(ARGIN(const char *cmd))
__attribute__nonnull__(1);
#define ASSERT_ARGS_chop_newline __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(buf))
#define ASSERT_ARGS_close_script_file __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_condition_regtype __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_current_breakpoint __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb))
#define ASSERT_ARGS_dbg_assign __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_break __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_continue __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_delete __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_disable __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_disassemble __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_echo __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_enable __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_eval __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_gcdebug __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_help __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_info __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_list __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_listbreakpoints __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_load __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_next __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_print __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_quit __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_run __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_script __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_stack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_trace __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_dbg_watch __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_debugger_cmdline __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_display_breakpoint __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(breakpoint))
#define ASSERT_ARGS_GDB_P __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(s))
#define ASSERT_ARGS_GDB_print_reg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_get_cmd __attribute__unused__ int _ASSERT_ARGS_CHECK = (0)
#define ASSERT_ARGS_get_exception_context __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(exception))
#define ASSERT_ARGS_get_uint __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_get_ulong __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_list_breakpoints __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb))
#define ASSERT_ARGS_no_such_register __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_nomoreargs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pdb) \
, PARROT_ASSERT_ARG(cmd))
#define ASSERT_ARGS_PDB_get_continuation_backtrace \
__attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(ctx))
#define ASSERT_ARGS_skip_whitespace __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(cmd))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
* Command functions and help dispatch
*/
/*
=item C<static int nomoreargs(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_assign(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_break(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_continue(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_delete(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_disable(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_disassemble(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_echo(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_enable(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_eval(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_gcdebug(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_help(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_info(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_list(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_listbreakpoints(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_load(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_next(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_print(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_quit(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_run(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_script(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_stack(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_trace(PDB_t *pdb, const char *cmd)>
=item C<static void dbg_watch(PDB_t *pdb, const char *cmd)>
These are command and help dispatch functions
=cut
*/
typedef void (* debugger_func_t)(ARGIN(PDB_t *pdb), ARGIN(const char *cmd));
static int
nomoreargs(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(nomoreargs)
if (*skip_whitespace(cmd) == '\0')
return 1;
else {
Parrot_io_eprintf(pdb->debugger, "Spurious arg\n");
return 0;
}
}
static void
dbg_assign(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_assign)
TRACEDEB_MSG("dbg_assign");
PDB_assign(pdb->debugee, cmd);
}
static void
dbg_break(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_break)
TRACEDEB_MSG("dbg_break");
PDB_set_break(pdb->debugee, cmd);
}
static void
dbg_continue(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_continue)
TRACEDEB_MSG("dbg_continue");
PDB_continue(pdb->debugee, cmd);
}
static void
dbg_delete(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_delete)
TRACEDEB_MSG("dbg_delete");
PDB_delete_breakpoint(pdb->debugee, cmd);
}
static void
dbg_disable(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_disable)
TRACEDEB_MSG("dbg_disable");
PDB_disable_breakpoint(pdb->debugee, cmd);
}
static void
dbg_disassemble(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_disassemble)
TRACEDEB_MSG("dbg_disassemble");
PDB_disassemble(pdb->debugee, cmd);
}
static void
dbg_echo(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_echo)
TRACEDEB_MSG("dbg_echo");
if (! nomoreargs(pdb, cmd))
return;
if (pdb->state & PDB_ECHO) {
TRACEDEB_MSG("Disabling echo");
pdb->state &= ~PDB_ECHO;
}
else {
TRACEDEB_MSG("Enabling echo");
pdb->state |= PDB_ECHO;
}
}
static void
dbg_enable(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_enable)
PDB_enable_breakpoint(pdb->debugee, cmd);
}
static void
dbg_eval(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_eval)
PDB_eval(pdb->debugee, cmd);
}
static void
dbg_gcdebug(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_gcdebug)
TRACEDEB_MSG("dbg_gcdebug");
if (! nomoreargs(pdb, cmd))
return;
if (pdb->state & PDB_GCDEBUG) {
TRACEDEB_MSG("Disabling gcdebug mode");
pdb->state &= ~PDB_GCDEBUG;
}
else {
TRACEDEB_MSG("Enabling gcdebug mode");
pdb->state |= PDB_GCDEBUG;
}
}
static void
dbg_help(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_help)
TRACEDEB_MSG("dbg_help");
PDB_help(pdb->debugee, cmd);
}
static void
dbg_info(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_info)
TRACEDEB_MSG("dbg_info");
if (! nomoreargs(pdb, cmd))
return;
PDB_info(pdb->debugger);
}
static void
dbg_list(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_list)
TRACEDEB_MSG("dbg_list");
PDB_list(pdb->debugee, cmd);
}
static void
dbg_listbreakpoints(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_listbreakpoints)
UNUSED(cmd);
TRACEDEB_MSG("dbg_list");
list_breakpoints(pdb);
}
static void
dbg_load(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_load)
TRACEDEB_MSG("dbg_load");
PDB_load_source(pdb->debugee, cmd);
}
static void
dbg_next(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_next)
TRACEDEB_MSG("dbg_next");
PDB_next(pdb->debugee, cmd);
}
static void
dbg_print(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_print)
TRACEDEB_MSG("dbg_print");
PDB_print(pdb->debugee, cmd);
}
static void
dbg_quit(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_quit)
TRACEDEB_MSG("dbg_quit");
if (! nomoreargs(pdb, cmd))
return;
pdb->state |= PDB_EXIT;
pdb->state &= ~PDB_STOPPED;
}
static void
dbg_run(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_run)
TRACEDEB_MSG("dbg_run");
PDB_init(pdb->debugee, cmd);
PDB_continue(pdb->debugee, NULL);
}
static void
dbg_script(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_script)
TRACEDEB_MSG("dbg_script");
PDB_script_file(pdb->debugee, cmd);
}
static void
dbg_stack(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_stack)
TRACEDEB_MSG("dbg_stack");
if (! nomoreargs(pdb, cmd))
return;
PDB_backtrace(pdb->debugee);
}
static void
dbg_trace(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_trace)
TRACEDEB_MSG("dbg_trace");
PDB_trace(pdb->debugee, cmd);
}
static void
dbg_watch(ARGIN(PDB_t *pdb), ARGIN(const char *cmd))
{
ASSERT_ARGS(dbg_watch)
TRACEDEB_MSG("dbg_watch");
PDB_watchpoint(pdb->debugee, cmd);
}
struct DebuggerCmd {
debugger_func_t func;
PARROT_OBSERVER const char * const shorthelp;
PARROT_OBSERVER const char * const help;
};
static const DebuggerCmd
cmd_assign = {
& dbg_assign,
"assign to a register",
"Assign a value to a register. For example:\n\
a I0 42\n\
a N1 3.14\n\
The first command sets I0 to 42 and the second sets N1 to 3.14."
},
cmd_break = {
& dbg_break,
"add a breakpoint",
"Set a breakpoint at a given line number (which must be specified).\n\n\
Optionally, specify a condition, in which case the breakpoint will only\n\
activate if the condition is met. Conditions take the form:\n\n\
if [REGISTER] [COMPARISON] [REGISTER or CONSTANT]\n\n\
\
For example:\n\n\
break 10 if I4 > I3\n\n\
break 45 if S1 == \"foo\"\n\n\
The command returns a number which is the breakpoint identifier."
},
cmd_continue = {
& dbg_continue,
"continue the program execution",
"Continue the program execution.\n\n\
Without arguments, the program runs until a breakpoint is found\n\
(or until the program terminates for some other reason).\n\n\
If a number is specified, then skip that many breakpoints.\n\n\
If the program has terminated, then \"continue\" will do nothing;\n\
use \"run\" to re-run the program."
},
cmd_delete = {
& dbg_delete,
"delete a breakpoint",
"Delete a breakpoint.\n\n\
The breakpoint to delete must be specified by its breakpoint number.\n\
Deleted breakpoints are gone completely. If instead you want to\n\
temporarily disable a breakpoint, use \"disable\"."
},
cmd_disable = {
& dbg_disable,
"disable a breakpoint",
"Disable a breakpoint.\n\n\
The breakpoint to disable must be specified by its breakpoint number.\n\
Disabled breakpoints are not forgotten, but have no effect until re-enabled\n\
with the \"enable\" command."
},
cmd_disassemble = {
& dbg_disassemble,
"disassemble the bytecode",
"Disassemble code"
},
cmd_echo = {
& dbg_echo,
"toggle echo of script commands",
"Toggle echo mode.\n\n\
In echo mode the script commands are written to stderr before executing."
},
cmd_enable = {
& dbg_enable,
"re-enable a disabled breakpoint",
"Re-enable a disabled breakpoint."
},
cmd_eval = {
& dbg_eval,
"run an instruction",
"No documentation yet"
},
cmd_gcdebug = {
& dbg_gcdebug,
"toggle gcdebug mode",
"Toggle gcdebug mode.\n\n\
In gcdebug mode a garbage collection cycle is run before each opcode,\n\
same as using the gcdebug core."
},
cmd_help = {
& dbg_help,
"print this help",
"Print a list of available commands."
},
cmd_info = {
& dbg_info,
"print interpreter information",
"Print information about the current interpreter"
},
cmd_list = {
& dbg_list,
"list the source code file",
"List the source code.\n\n\
Optionally specify the line number to begin the listing from and the number\n\
of lines to display."
},
cmd_listbreakpoints = {
& dbg_listbreakpoints,
"list breakpoints",
"List breakpoints."
},
cmd_load = {
& dbg_load,
"load a source code file",
"Load a source code file."
},
cmd_next = {
& dbg_next,
"run the next instruction",
"Execute a specified number of instructions.\n\n\
If a number is specified with the command (e.g. \"next 5\"), then\n\
execute that number of instructions, unless the program reaches a\n\
breakpoint, or stops for some other reason.\n\n\
If no number is specified, it defaults to 1."
},
cmd_print = {
& dbg_print,
"print the interpreter registers",
"Print register: e.g. \"p i2\"\n\
Note that the register type is case-insensitive. If no digits appear\n\
after the register type, all registers of that type are printed."
},
cmd_quit = {
& dbg_quit,
"exit the debugger",
"Exit the debugger"
},
cmd_run = {
& dbg_run,
"run the program",
"Run (or restart) the program being debugged.\n\n\
Arguments specified after \"run\" are passed as command line arguments to\n\
the program.\n"
},
cmd_script = {
& dbg_script,
"interprets a file as user commands",
"Interprets a file s user commands.\n\
Usage:\n\
(pdb) script file.script"
},
cmd_stack = {
& dbg_stack,
"examine the stack",
"Print a stack trace of the parrot VM"
},
cmd_trace = {
& dbg_trace,
"trace the next instruction",
"Similar to \"next\", but prints additional trace information.\n\
This is the same as the information you get when running Parrot with\n\
the -t option.\n"
},
cmd_watch = {
& dbg_watch,
"add a watchpoint",
"Add a watchpoint"
};
struct DebuggerCmdList {
PARROT_OBSERVER const char * const name;
char shortname;
PARROT_OBSERVER const DebuggerCmd * const cmd;
};
const DebuggerCmdList DebCmdList [] = {
{ "assign", 'a', &cmd_assign },
{ "blist", '\0', &cmd_listbreakpoints },
{ "break", '\0', &cmd_break },
{ "continue", '\0', &cmd_continue },
{ "delete", 'd', &cmd_delete },
{ "disable", '\0', &cmd_disable },
{ "disassemble", '\0', &cmd_disassemble },
{ "e", '\0', &cmd_eval },
{ "echo", '\0', &cmd_echo },
{ "enable", '\0', &cmd_enable },
{ "eval", '\0', &cmd_eval },
{ "f", '\0', &cmd_script },
{ "gcdebug", '\0', &cmd_gcdebug },
{ "help", '\0', &cmd_help },
{ "info", '\0', &cmd_info },
{ "L", '\0', &cmd_listbreakpoints },
{ "list", 'l', &cmd_list },
{ "load", '\0', &cmd_load },
{ "next", '\0', &cmd_next },
{ "print", '\0', &cmd_print },
{ "quit", '\0', &cmd_quit },
{ "run", '\0', &cmd_run },
{ "script", '\0', &cmd_script },
{ "stack", 's', &cmd_stack },
{ "trace", '\0', &cmd_trace },
{ "watch", '\0', &cmd_watch }
};
/*
=item C<static const DebuggerCmd * get_cmd(const char **cmd)>
Parse the debuggger command indicated by C<**cmd>. Return a pointer to the
matching function for known commands, or a NULL pointer otherwise.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static const DebuggerCmd *
get_cmd(ARGIN_NULLOK(const char **cmd))
{
ASSERT_ARGS(get_cmd)
if (cmd && *cmd) {
const char * const start = skip_whitespace(*cmd);
const char *next = start;
char c;
unsigned int i, l;
int found = -1;
int hits = 0;
*cmd = start;
for (; (c= *next) != '\0' && !isspace((unsigned char)c); ++next)
continue;
l = next - start;
if (l == 0)
return NULL;
for (i= 0; i < sizeof (DebCmdList) / sizeof (DebuggerCmdList); ++i) {
const DebuggerCmdList * const cmdlist = DebCmdList + i;
if (l == 1 && cmdlist->shortname == (*cmd)[0]) {
hits = 1;
found = i;
break;
}
if (strncmp(*cmd, cmdlist->name, l) == 0) {
if (strlen(cmdlist->name) == l) {
hits = 1;
found = i;
break;
}
else {
++hits;
found = i;
}
}
}
if (hits == 1) {
*cmd = skip_whitespace(next);
return DebCmdList[found].cmd;
}
}
return NULL;
}
/*
=item C<static const char * skip_whitespace(const char *cmd)>
Return a pointer to the first non-whitespace character in C<cmd>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_PURE_FUNCTION
static const char *
skip_whitespace(ARGIN(const char *cmd))
{
ASSERT_ARGS(skip_whitespace)
while (*cmd && isspace((unsigned char)*cmd))
++cmd;
return cmd;
}
/*
=item C<static unsigned long get_uint(const char **cmd, unsigned int def)>
Get an unsigned int from C<**cmd>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
static unsigned long
get_uint(ARGMOD(const char **cmd), unsigned int def)
{
ASSERT_ARGS(get_uint)
char *cmdnext;
unsigned int result = strtoul(skip_whitespace(* cmd), & cmdnext, 0);
if (cmdnext != *cmd)
*cmd = cmdnext;
else
result = def;
return result;
}
/*
=item C<static unsigned long get_ulong(const char **cmd, unsigned long def)>
Get an unsigned long from C<**cmd>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
static unsigned long