[PATCH 4/9] New gdbarch functions: dtrace_probe_argument, dtrace_probe_is_enabled, dtrace_enable_probe, dtrace_disable_probe.

Jose E. Marchesi
2014-09-26T09:43:44Z

This patch adds several gdbarch functions (along with the
corresponding predicates): `dtrace_probe_argument',
`dtrace_probe_is_enabled', `dtrace_enable_probe' and
`dtrace_disable_probe'. These functions will be implemented by
target-specific code, and called from the DTrace probes implementation
in order to calculate the value of probe arguments, and manipulate
is-enabled probes.

gdb:

2014-09-26 Jose E. Marchesi <jose.marchesi@oracle.com>

* gdbarch.sh (dtrace_probe_argument): New.
(dtrace_probe_is_enabled): Likewise.
(dtrace_enable_probe): Likewise.
(dtrace_disable_probe): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
---
gdb/ChangeLog | 9 ++++
gdb/gdbarch.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
gdb/gdbarch.h | 36 ++++++++++++++++
gdb/gdbarch.sh | 16 +++++++
4 files changed, 189 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2f94e05..7041cfb 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,14 @@
2014-09-26 Jose E. Marchesi <jose.marchesi@oracle.com>

+ * gdbarch.sh (dtrace_probe_argument): New.
+ (dtrace_probe_is_enabled): Likewise.
+ (dtrace_enable_probe): Likewise.
+ (dtrace_disable_probe): Likewise.
+ * gdbarch.c: Regenerate.
+ * gdbarch.h: Regenerate.
+
+2014-09-26 Jose E. Marchesi <jose.marchesi@oracle.com>
+
* stap-probe.c (stap_probe_ops): Add NULLs in the static
stap_probe_ops for `enable_probe' and `disable_probe'.

diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index b0ee79d..3d494a4 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -299,6 +299,10 @@ struct gdbarch
const char * stap_gdb_register_suffix;
gdbarch_stap_is_single_operand_ftype *stap_is_single_operand;
gdbarch_stap_parse_special_token_ftype *stap_parse_special_token;
+ gdbarch_dtrace_probe_argument_ftype *dtrace_probe_argument;
+ gdbarch_dtrace_probe_is_enabled_ftype *dtrace_probe_is_enabled;
+ gdbarch_dtrace_enable_probe_ftype *dtrace_enable_probe;
+ gdbarch_dtrace_disable_probe_ftype *dtrace_disable_probe;
int has_global_solist;
int has_global_breakpoints;
gdbarch_has_shared_address_space_ftype *has_shared_address_space;
@@ -611,6 +615,10 @@ verify_gdbarch (struct gdbarch *gdbarch)
/* Skip verify of stap_gdb_register_suffix, invalid_p == 0 */
/* Skip verify of stap_is_single_operand, has predicate. */
/* Skip verify of stap_parse_special_token, has predicate. */
+ /* Skip verify of dtrace_probe_argument, has predicate. */
+ /* Skip verify of dtrace_probe_is_enabled, has predicate. */
+ /* Skip verify of dtrace_enable_probe, has predicate. */
+ /* Skip verify of dtrace_disable_probe, has predicate. */
/* Skip verify of has_global_solist, invalid_p == 0 */
/* Skip verify of has_global_breakpoints, invalid_p == 0 */
/* Skip verify of has_shared_address_space, invalid_p == 0 */
@@ -819,6 +827,30 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
"gdbarch_dump: double_format = %s\n",
pformat (gdbarch->double_format));
fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_dtrace_disable_probe_p() = %d\n",
+ gdbarch_dtrace_disable_probe_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: dtrace_disable_probe = <%s>\n",
+ host_address_to_string (gdbarch->dtrace_disable_probe));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_dtrace_enable_probe_p() = %d\n",
+ gdbarch_dtrace_enable_probe_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: dtrace_enable_probe = <%s>\n",
+ host_address_to_string (gdbarch->dtrace_enable_probe));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_dtrace_probe_argument_p() = %d\n",
+ gdbarch_dtrace_probe_argument_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: dtrace_probe_argument = <%s>\n",
+ host_address_to_string (gdbarch->dtrace_probe_argument));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_dtrace_probe_is_enabled_p() = %d\n",
+ gdbarch_dtrace_probe_is_enabled_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: dtrace_probe_is_enabled = <%s>\n",
+ host_address_to_string (gdbarch->dtrace_probe_is_enabled));
+ fprintf_unfiltered (file,
"gdbarch_dump: gdbarch_dummy_id_p() = %d\n",
gdbarch_dummy_id_p (gdbarch));
fprintf_unfiltered (file,
@@ -4095,6 +4127,102 @@ set_gdbarch_stap_parse_special_token (struct gdbarch *gdbarch,
}

int
+gdbarch_dtrace_probe_argument_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->dtrace_probe_argument != NULL;
+}
+
+void
+gdbarch_dtrace_probe_argument (struct gdbarch *gdbarch, struct parser_state *pstate, int narg)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->dtrace_probe_argument != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_dtrace_probe_argument called\n");
+ gdbarch->dtrace_probe_argument (gdbarch, pstate, narg);
+}
+
+void
+set_gdbarch_dtrace_probe_argument (struct gdbarch *gdbarch,
+ gdbarch_dtrace_probe_argument_ftype dtrace_probe_argument)
+{
+ gdbarch->dtrace_probe_argument = dtrace_probe_argument;
+}
+
+int
+gdbarch_dtrace_probe_is_enabled_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->dtrace_probe_is_enabled != NULL;
+}
+
+int
+gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->dtrace_probe_is_enabled != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_dtrace_probe_is_enabled called\n");
+ return gdbarch->dtrace_probe_is_enabled (gdbarch, addr);
+}
+
+void
+set_gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch,
+ gdbarch_dtrace_probe_is_enabled_ftype dtrace_probe_is_enabled)
+{
+ gdbarch->dtrace_probe_is_enabled = dtrace_probe_is_enabled;
+}
+
+int
+gdbarch_dtrace_enable_probe_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->dtrace_enable_probe != NULL;
+}
+
+void
+gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->dtrace_enable_probe != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_dtrace_enable_probe called\n");
+ gdbarch->dtrace_enable_probe (gdbarch, addr);
+}
+
+void
+set_gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch,
+ gdbarch_dtrace_enable_probe_ftype dtrace_enable_probe)
+{
+ gdbarch->dtrace_enable_probe = dtrace_enable_probe;
+}
+
+int
+gdbarch_dtrace_disable_probe_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->dtrace_disable_probe != NULL;
+}
+
+void
+gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->dtrace_disable_probe != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_dtrace_disable_probe called\n");
+ gdbarch->dtrace_disable_probe (gdbarch, addr);
+}
+
+void
+set_gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch,
+ gdbarch_dtrace_disable_probe_ftype dtrace_disable_probe)
+{
+ gdbarch->dtrace_disable_probe = dtrace_disable_probe;
+}
+
+int
gdbarch_has_global_solist (struct gdbarch *gdbarch)
{
gdb_assert (gdbarch != NULL);
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 0303b2e..89f3c83 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -57,6 +57,7 @@ struct syscall;
struct agent_expr;
struct axs_value;
struct stap_parse_info;
+struct parser_state;
struct ravenscar_arch_ops;
struct elf_internal_linux_prpsinfo;

@@ -1179,6 +1180,41 @@ typedef int (gdbarch_stap_parse_special_token_ftype) (struct gdbarch *gdbarch, s
extern int gdbarch_stap_parse_special_token (struct gdbarch *gdbarch, struct stap_parse_info *p);
extern void set_gdbarch_stap_parse_special_token (struct gdbarch *gdbarch, gdbarch_stap_parse_special_token_ftype *stap_parse_special_token);

+/* DTrace related functions.
+ The expression to compute the NARTGth+1 argument to a DTrace USDT probe.
+ NARG must be >= 0. */
+
+extern int gdbarch_dtrace_probe_argument_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_probe_argument_ftype) (struct gdbarch *gdbarch, struct parser_state *pstate, int narg);
+extern void gdbarch_dtrace_probe_argument (struct gdbarch *gdbarch, struct parser_state *pstate, int narg);
+extern void set_gdbarch_dtrace_probe_argument (struct gdbarch *gdbarch, gdbarch_dtrace_probe_argument_ftype *dtrace_probe_argument);
+
+/* True if the given ADDR does not contain the instruction sequence
+ corresponding to a disabled DTrace is-enabled probe. */
+
+extern int gdbarch_dtrace_probe_is_enabled_p (struct gdbarch *gdbarch);
+
+typedef int (gdbarch_dtrace_probe_is_enabled_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern int gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch, gdbarch_dtrace_probe_is_enabled_ftype *dtrace_probe_is_enabled);
+
+/* Enable a DTrace is-enabled probe at ADDR. */
+
+extern int gdbarch_dtrace_enable_probe_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_enable_probe_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch, gdbarch_dtrace_enable_probe_ftype *dtrace_enable_probe);
+
+/* Disable a DTrace is-enabled probe at ADDR. */
+
+extern int gdbarch_dtrace_disable_probe_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_disable_probe_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch, gdbarch_dtrace_disable_probe_ftype *dtrace_disable_probe);
+
/* True if the list of shared libraries is one and only for all
processes, as opposed to a list of shared libraries per inferior.
This usually means that all processes, although may or may not share
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 2a8bca8..0458134 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -944,6 +944,21 @@ M:int:stap_is_single_operand:const char *s:s
# parser), and should advance the buffer pointer (p->arg).
M:int:stap_parse_special_token:struct stap_parse_info *p:p

+# DTrace related functions.
+
+# The expression to compute the NARTGth+1 argument to a DTrace USDT probe.
+# NARG must be >= 0.
+M:void:dtrace_probe_argument:struct parser_state *pstate, int narg:pstate, narg
+
+# True if the given ADDR does not contain the instruction sequence
+# corresponding to a disabled DTrace is-enabled probe.
+M:int:dtrace_probe_is_enabled:CORE_ADDR addr:addr
+
+# Enable a DTrace is-enabled probe at ADDR.
+M:void:dtrace_enable_probe:CORE_ADDR addr:addr
+
+# Disable a DTrace is-enabled probe at ADDR.
+M:void:dtrace_disable_probe:CORE_ADDR addr:addr

# True if the list of shared libraries is one and only for all
# processes, as opposed to a list of shared libraries per inferior.
@@ -1146,6 +1161,7 @@ struct syscall;
struct agent_expr;
struct axs_value;
struct stap_parse_info;
+struct parser_state;
struct ravenscar_arch_ops;
struct elf_internal_linux_prpsinfo;

--
1.7.10.4