0a261ed82e
If GDB decides to change the breakpoint's conditions or commands, it'll reinsert the same breakpoint again, with the new options attached, without deleting the previous breakpoint. E.g., (gdb) set breakpoint always-inserted on (gdb) b main if 0 Breakpoint 1 at 0x400594: file foo.c, line 21. Sending packet: $Z0,400594,1;X3,220027#68...Packet received: OK (gdb) b main Breakpoint 15 at 0x400594: file foo.c, line 21. Sending packet: $Z0,400594,1#49...Packet received: OK GDBserver understands this and deletes the breakpoint's previous conditions. But, it forgets to delete the previous commands. gdb/gdbserver/ 2014-06-02 Pedro Alves <palves@redhat.com> * ax.c (gdb_free_agent_expr): New function. * ax.h (gdb_free_agent_expr): New declaration. * mem-break.c (delete_gdb_breakpoint_1): Also clear the commands list. (clear_breakpoint_conditions, clear_breakpoint_commands): Make static. (clear_breakpoint_conditions_and_commands): New function. * mem-break.h (clear_breakpoint_conditions): Delete declaration. (clear_breakpoint_conditions_and_commands): New declaration.
146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/* Data structures and functions associated with agent expressions in GDB.
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Copyright (C) 2009-2014 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (AX_H)
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#define AX_H 1
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#include "server.h"
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#include "regcache.h"
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#ifdef IN_PROCESS_AGENT
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extern int debug_agent;
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#define debug_threads debug_agent
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#endif
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struct traceframe;
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/* Enumeration of the different kinds of things that can happen during
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agent expression evaluation. */
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enum eval_result_type
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{
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expr_eval_no_error,
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expr_eval_empty_expression,
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expr_eval_empty_stack,
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expr_eval_stack_overflow,
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expr_eval_stack_underflow,
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expr_eval_unhandled_opcode,
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expr_eval_unrecognized_opcode,
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expr_eval_divide_by_zero,
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expr_eval_invalid_goto
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};
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struct agent_expr
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{
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int length;
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unsigned char *bytes;
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};
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#ifndef IN_PROCESS_AGENT
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/* The packet form of an agent expression consists of an 'X', number
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of bytes in expression, a comma, and then the bytes. */
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struct agent_expr *gdb_parse_agent_expr (char **actparm);
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/* Release an agent expression. */
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void gdb_free_agent_expr (struct agent_expr *aexpr);
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/* Convert the bytes of an agent expression back into hex digits, so
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they can be printed or uploaded. This allocates the buffer,
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callers should free when they are done with it. */
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char *gdb_unparse_agent_expr (struct agent_expr *aexpr);
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void emit_prologue (void);
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void emit_epilogue (void);
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enum eval_result_type compile_bytecodes (struct agent_expr *aexpr);
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#endif
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/* The context when evaluating agent expression. */
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struct eval_agent_expr_context
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{
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/* The registers when evaluating agent expression. */
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struct regcache *regcache;
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/* The traceframe, if any, when evaluating agent expression. */
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struct traceframe *tframe;
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/* The tracepoint, if any, when evaluating agent expression. */
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struct tracepoint *tpoint;
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};
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enum eval_result_type
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gdb_eval_agent_expr (struct eval_agent_expr_context *ctx,
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struct agent_expr *aexpr,
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ULONGEST *rslt);
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/* Bytecode compilation function vector. */
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struct emit_ops
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{
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void (*emit_prologue) (void);
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void (*emit_epilogue) (void);
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void (*emit_add) (void);
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void (*emit_sub) (void);
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void (*emit_mul) (void);
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void (*emit_lsh) (void);
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void (*emit_rsh_signed) (void);
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void (*emit_rsh_unsigned) (void);
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void (*emit_ext) (int arg);
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void (*emit_log_not) (void);
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void (*emit_bit_and) (void);
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void (*emit_bit_or) (void);
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void (*emit_bit_xor) (void);
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void (*emit_bit_not) (void);
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void (*emit_equal) (void);
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void (*emit_less_signed) (void);
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void (*emit_less_unsigned) (void);
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void (*emit_ref) (int size);
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void (*emit_if_goto) (int *offset_p, int *size_p);
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void (*emit_goto) (int *offset_p, int *size_p);
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void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
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void (*emit_const) (LONGEST num);
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void (*emit_call) (CORE_ADDR fn);
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void (*emit_reg) (int reg);
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void (*emit_pop) (void);
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void (*emit_stack_flush) (void);
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void (*emit_zero_ext) (int arg);
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void (*emit_swap) (void);
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void (*emit_stack_adjust) (int n);
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/* Emit code for a generic function that takes one fixed integer
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argument and returns a 64-bit int (for instance, tsv getter). */
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void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
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/* Emit code for a generic function that takes one fixed integer
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argument and a 64-bit int from the top of the stack, and returns
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nothing (for instance, tsv setter). */
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void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
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/* Emit code specialized for common combinations of compare followed
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by a goto. */
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void (*emit_eq_goto) (int *offset_p, int *size_p);
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void (*emit_ne_goto) (int *offset_p, int *size_p);
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void (*emit_lt_goto) (int *offset_p, int *size_p);
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void (*emit_le_goto) (int *offset_p, int *size_p);
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void (*emit_gt_goto) (int *offset_p, int *size_p);
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void (*emit_ge_goto) (int *offset_p, int *size_p);
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};
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extern CORE_ADDR current_insn_ptr;
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extern int emit_error;
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#endif /* AX_H */
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