Move compute_probe_arg' and compile_probe_arg' to probe.c
This patch moves the `compute_probe_arg' and `compile_probe_arg' functions from stap-probe.c to probe.c. The rationale is that it is reasonable to assume that all backends will provide the `$_probe_argN' convenience variables, and that the user must be placed on the PC of the probe when requesting that information. The value and type of the argument can still be determined by the probe backend via the `pops->evaluate_probe_argument' and `pops->compile_to_ax' handlers. Note that a test in gdb.base/stap-probe.exp had to be adjusted because the "No SystemTap probe at PC" messages are now "No probe at PC". gdb/ChangeLog: 2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com> * probe.c (compute_probe_arg): Moved from stap-probe.c (compile_probe_arg): Likewise. (probe_funcs): Likewise. * stap-probe.c (compute_probe_arg): Moved to probe.c. (compile_probe_arg): Likewise. (probe_funcs): Likewise. gdb/testsuite/ChangeLog: 2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com> * gdb.base/stap-probe.exp (stap_test): Remove "SystemTap" from expected message when trying to access $_probe_* convenience variables while not on a probe.
This commit is contained in:
Jose E. Marchesi
parent
6f9b84910f
commit
03e98035a2
5 changed files with 127 additions and 110 deletions
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@ -1,3 +1,12 @@
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2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
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* probe.c (compute_probe_arg): Moved from stap-probe.c
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(compile_probe_arg): Likewise.
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(probe_funcs): Likewise.
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* stap-probe.c (compute_probe_arg): Moved to probe.c.
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(compile_probe_arg): Likewise.
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(probe_funcs): Likewise.
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2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
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* probe.c (print_ui_out_not_applicables): New function.
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111
gdb/probe.c
111
gdb/probe.c
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@ -30,6 +30,9 @@
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#include "gdb_regex.h"
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#include "frame.h"
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#include "arch-utils.h"
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#include "value.h"
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#include "ax.h"
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#include "ax-gdb.h"
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#include <ctype.h>
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typedef struct bound_probe bound_probe_s;
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@ -826,6 +829,87 @@ will show information about all types of probes."),
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return &info_probes_cmdlist;
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}
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/* This is called to compute the value of one of the $_probe_arg*
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convenience variables. */
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static struct value *
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compute_probe_arg (struct gdbarch *arch, struct internalvar *ivar,
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void *data)
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{
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struct frame_info *frame = get_selected_frame (_("No frame selected"));
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CORE_ADDR pc = get_frame_pc (frame);
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int sel = (int) (uintptr_t) data;
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struct bound_probe pc_probe;
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const struct sym_probe_fns *pc_probe_fns;
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unsigned n_args;
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/* SEL == -1 means "_probe_argc". */
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gdb_assert (sel >= -1);
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pc_probe = find_probe_by_pc (pc);
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if (pc_probe.probe == NULL)
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error (_("No probe at PC %s"), core_addr_to_string (pc));
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n_args = get_probe_argument_count (pc_probe.probe, frame);
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if (sel == -1)
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return value_from_longest (builtin_type (arch)->builtin_int, n_args);
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if (sel >= n_args)
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error (_("Invalid probe argument %d -- probe has %u arguments available"),
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sel, n_args);
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return evaluate_probe_argument (pc_probe.probe, sel, frame);
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}
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/* This is called to compile one of the $_probe_arg* convenience
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variables into an agent expression. */
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static void
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compile_probe_arg (struct internalvar *ivar, struct agent_expr *expr,
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struct axs_value *value, void *data)
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{
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CORE_ADDR pc = expr->scope;
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int sel = (int) (uintptr_t) data;
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struct bound_probe pc_probe;
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const struct sym_probe_fns *pc_probe_fns;
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int n_args;
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struct frame_info *frame = get_selected_frame (NULL);
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/* SEL == -1 means "_probe_argc". */
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gdb_assert (sel >= -1);
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pc_probe = find_probe_by_pc (pc);
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if (pc_probe.probe == NULL)
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error (_("No probe at PC %s"), core_addr_to_string (pc));
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n_args = get_probe_argument_count (pc_probe.probe, frame);
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if (sel == -1)
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{
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value->kind = axs_rvalue;
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value->type = builtin_type (expr->gdbarch)->builtin_int;
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ax_const_l (expr, n_args);
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return;
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}
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gdb_assert (sel >= 0);
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if (sel >= n_args)
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error (_("Invalid probe argument %d -- probe has %d arguments available"),
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sel, n_args);
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pc_probe.probe->pops->compile_to_ax (pc_probe.probe, expr, value, sel);
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}
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static const struct internalvar_funcs probe_funcs =
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{
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compute_probe_arg,
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compile_probe_arg,
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NULL
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};
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VEC (probe_ops_cp) *all_probe_ops;
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void _initialize_probe (void);
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@ -835,6 +919,33 @@ _initialize_probe (void)
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{
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VEC_safe_push (probe_ops_cp, all_probe_ops, &probe_ops_any);
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create_internalvar_type_lazy ("_probe_argc", &probe_funcs,
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(void *) (uintptr_t) -1);
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create_internalvar_type_lazy ("_probe_arg0", &probe_funcs,
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(void *) (uintptr_t) 0);
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create_internalvar_type_lazy ("_probe_arg1", &probe_funcs,
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(void *) (uintptr_t) 1);
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create_internalvar_type_lazy ("_probe_arg2", &probe_funcs,
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(void *) (uintptr_t) 2);
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create_internalvar_type_lazy ("_probe_arg3", &probe_funcs,
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(void *) (uintptr_t) 3);
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create_internalvar_type_lazy ("_probe_arg4", &probe_funcs,
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(void *) (uintptr_t) 4);
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create_internalvar_type_lazy ("_probe_arg5", &probe_funcs,
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(void *) (uintptr_t) 5);
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create_internalvar_type_lazy ("_probe_arg6", &probe_funcs,
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(void *) (uintptr_t) 6);
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create_internalvar_type_lazy ("_probe_arg7", &probe_funcs,
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(void *) (uintptr_t) 7);
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create_internalvar_type_lazy ("_probe_arg8", &probe_funcs,
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(void *) (uintptr_t) 8);
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create_internalvar_type_lazy ("_probe_arg9", &probe_funcs,
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(void *) (uintptr_t) 9);
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create_internalvar_type_lazy ("_probe_arg10", &probe_funcs,
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(void *) (uintptr_t) 10);
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create_internalvar_type_lazy ("_probe_arg11", &probe_funcs,
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(void *) (uintptr_t) 11);
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add_cmd ("all", class_info, info_probes_command,
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_("\
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Show information about all type of probes."),
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109
gdb/stap-probe.c
109
gdb/stap-probe.c
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@ -1365,79 +1365,6 @@ stap_probe_destroy (struct probe *probe_generic)
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/* This is called to compute the value of one of the $_probe_arg*
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convenience variables. */
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static struct value *
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compute_probe_arg (struct gdbarch *arch, struct internalvar *ivar,
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void *data)
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{
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struct frame_info *frame = get_selected_frame (_("No frame selected"));
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CORE_ADDR pc = get_frame_pc (frame);
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int sel = (int) (uintptr_t) data;
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struct bound_probe pc_probe;
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const struct sym_probe_fns *pc_probe_fns;
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unsigned n_args;
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/* SEL == -1 means "_probe_argc". */
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gdb_assert (sel >= -1);
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pc_probe = find_probe_by_pc (pc);
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if (pc_probe.probe == NULL)
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error (_("No SystemTap probe at PC %s"), core_addr_to_string (pc));
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n_args = get_probe_argument_count (pc_probe.probe, frame);
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if (sel == -1)
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return value_from_longest (builtin_type (arch)->builtin_int, n_args);
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if (sel >= n_args)
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error (_("Invalid probe argument %d -- probe has %u arguments available"),
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sel, n_args);
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return evaluate_probe_argument (pc_probe.probe, sel, frame);
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}
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/* This is called to compile one of the $_probe_arg* convenience
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variables into an agent expression. */
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static void
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compile_probe_arg (struct internalvar *ivar, struct agent_expr *expr,
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struct axs_value *value, void *data)
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{
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CORE_ADDR pc = expr->scope;
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int sel = (int) (uintptr_t) data;
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struct bound_probe pc_probe;
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const struct sym_probe_fns *pc_probe_fns;
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int n_args;
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struct frame_info *frame = get_selected_frame (NULL);
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/* SEL == -1 means "_probe_argc". */
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gdb_assert (sel >= -1);
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pc_probe = find_probe_by_pc (pc);
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if (pc_probe.probe == NULL)
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error (_("No SystemTap probe at PC %s"), core_addr_to_string (pc));
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n_args = get_probe_argument_count (pc_probe.probe, frame);
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if (sel == -1)
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{
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value->kind = axs_rvalue;
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value->type = builtin_type (expr->gdbarch)->builtin_int;
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ax_const_l (expr, n_args);
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return;
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}
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gdb_assert (sel >= 0);
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if (sel >= n_args)
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error (_("Invalid probe argument %d -- probe has %d arguments available"),
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sel, n_args);
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pc_probe.probe->pops->compile_to_ax (pc_probe.probe, expr, value, sel);
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}
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/* Set or clear a SystemTap semaphore. ADDRESS is the semaphore's
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address. SET is zero if the semaphore should be cleared, or one
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if it should be set. This is a helper function for `stap_semaphore_down'
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@ -1514,15 +1441,6 @@ stap_clear_semaphore (struct probe *probe_generic, struct objfile *objfile,
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stap_modify_semaphore (addr, 0, gdbarch);
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}
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/* Implementation of `$_probe_arg*' set of variables. */
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static const struct internalvar_funcs probe_funcs =
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{
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compute_probe_arg,
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compile_probe_arg,
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NULL
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};
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/* Helper function that parses the information contained in a
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SystemTap's probe. Basically, the information consists in:
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@ -1793,33 +1711,6 @@ _initialize_stap_probe (void)
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show_stapexpressiondebug,
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&setdebuglist, &showdebuglist);
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create_internalvar_type_lazy ("_probe_argc", &probe_funcs,
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(void *) (uintptr_t) -1);
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create_internalvar_type_lazy ("_probe_arg0", &probe_funcs,
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(void *) (uintptr_t) 0);
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create_internalvar_type_lazy ("_probe_arg1", &probe_funcs,
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(void *) (uintptr_t) 1);
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create_internalvar_type_lazy ("_probe_arg2", &probe_funcs,
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(void *) (uintptr_t) 2);
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create_internalvar_type_lazy ("_probe_arg3", &probe_funcs,
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(void *) (uintptr_t) 3);
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create_internalvar_type_lazy ("_probe_arg4", &probe_funcs,
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(void *) (uintptr_t) 4);
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create_internalvar_type_lazy ("_probe_arg5", &probe_funcs,
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(void *) (uintptr_t) 5);
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create_internalvar_type_lazy ("_probe_arg6", &probe_funcs,
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(void *) (uintptr_t) 6);
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create_internalvar_type_lazy ("_probe_arg7", &probe_funcs,
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(void *) (uintptr_t) 7);
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create_internalvar_type_lazy ("_probe_arg8", &probe_funcs,
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(void *) (uintptr_t) 8);
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create_internalvar_type_lazy ("_probe_arg9", &probe_funcs,
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(void *) (uintptr_t) 9);
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create_internalvar_type_lazy ("_probe_arg10", &probe_funcs,
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(void *) (uintptr_t) 10);
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create_internalvar_type_lazy ("_probe_arg11", &probe_funcs,
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(void *) (uintptr_t) 11);
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add_cmd ("stap", class_info, info_probes_stap_command,
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_("\
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Show information about SystemTap static probes.\n\
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@ -1,3 +1,9 @@
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2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
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* gdb.base/stap-probe.exp (stap_test): Remove "SystemTap" from
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expected message when trying to access $_probe_* convenience
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variables while not on a probe.
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2015-02-11 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.python/py-framefilter.exp (pagination quit - *): New tests.
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@ -30,7 +30,7 @@ proc stap_test {exec_name {arg ""}} {
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return -1
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}
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gdb_test "print \$_probe_argc" "No SystemTap probe at PC $hex" \
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gdb_test "print \$_probe_argc" "No probe at PC $hex" \
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"check argument not at probe point"
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gdb_test "info probes stap" \
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