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authorStan Shebs <shebs@codesourcery.com>2011-11-02 23:44:21 +0000
committerStan Shebs <shebs@codesourcery.com>2011-11-02 23:44:21 +0000
commit3065dfb6b4e2e605b3601c5f71fa25de5dd4970e (patch)
treeac641720c021164a841a9c669e88e599134191e6 /gdb
parent39f4f51d8bf1d516a5cca652a1d9efe8f3ef9863 (diff)
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2011-11-02 Stan Shebs <stan@codesourcery.com>
String collection for tracepoints. * NEWS: Mention string collection. * common/ax.def (tracenz): New bytecode. * ax-gdb.h (trace_string_kludge): Declare. * ax-gdb.c: Include valprint.h and c-lang.h. (trace_string_kludge): New global. (gen_traced_pop): Add string case. (agent_command): Add string case. * tracepoint.h (decode_agent_options): Declare. * tracepoint.c: Include cli-utils.h. (decode_agent_options): New function. (validate_actionline): Call it. (encode_actions_1): Ditto. * target.h (struct target_ops): New method to_supports_string_tracing. (target_supports_string_tracing): New macro. * target.c (update_current_target): Add to_supports_string_tracing. * remote.c (struct remote_state): New field string_tracing. (remote_string_tracing_feature): New function. (remote_protocol_features): New feature tracenz. (remote_supports_string_tracing): New function. (init_remote_ops): Set to_supports_string_tracing. * tracepoint.c (agent_mem_read_string): New function. (eval_agent_expr): Call it for tracenz. * server.c (handle_query): Report support for tracenz. * gdb.texinfo (Tracepoint Action Lists): Document collect/s. (General Query Packets): Describe tracenz feature. * agentexpr.texi (Bytecode Descriptions): Describe tracenz. * gdb.trace/collection.c: Add code using strings. * gdb.trace/collection.exp: Add tests of string collection.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog24
-rw-r--r--gdb/NEWS8
-rw-r--r--gdb/ax-gdb.c50
-rw-r--r--gdb/ax-gdb.h1
-rw-r--r--gdb/common/ax.def3
-rw-r--r--gdb/doc/ChangeLog6
-rw-r--r--gdb/doc/agentexpr.texi5
-rw-r--r--gdb/doc/gdb.texinfo21
-rw-r--r--gdb/gdbserver/ChangeLog6
-rw-r--r--gdb/gdbserver/server.c1
-rw-r--r--gdb/gdbserver/tracepoint.c70
-rw-r--r--gdb/remote.c24
-rw-r--r--gdb/target.c4
-rw-r--r--gdb/target.h6
-rw-r--r--gdb/testsuite/ChangeLog5
-rw-r--r--gdb/testsuite/gdb.trace/collection.c16
-rw-r--r--gdb/testsuite/gdb.trace/collection.exp50
-rw-r--r--gdb/tracepoint.c52
-rw-r--r--gdb/tracepoint.h3
19 files changed, 349 insertions, 6 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b4fa9a6..18f8bf7 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,27 @@
+2011-11-02 Stan Shebs <stan@codesourcery.com>
+
+ String collection for tracepoints.
+ * NEWS: Mention string collection.
+ * common/ax.def (tracenz): New bytecode.
+ * ax-gdb.h (trace_string_kludge): Declare.
+ * ax-gdb.c: Include valprint.h and c-lang.h.
+ (trace_string_kludge): New global.
+ (gen_traced_pop): Add string case.
+ (agent_command): Add string case.
+ * tracepoint.h (decode_agent_options): Declare.
+ * tracepoint.c: Include cli-utils.h.
+ (decode_agent_options): New function.
+ (validate_actionline): Call it.
+ (encode_actions_1): Ditto.
+ * target.h (struct target_ops): New method to_supports_string_tracing.
+ (target_supports_string_tracing): New macro.
+ * target.c (update_current_target): Add to_supports_string_tracing.
+ * remote.c (struct remote_state): New field string_tracing.
+ (remote_string_tracing_feature): New function.
+ (remote_protocol_features): New feature tracenz.
+ (remote_supports_string_tracing): New function.
+ (init_remote_ops): Set to_supports_string_tracing.
+
2011-11-02 Pedro Alves <pedro@codesourcery.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
diff --git a/gdb/NEWS b/gdb/NEWS
index 9a27b64..1713049 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -114,6 +114,14 @@ info auto-load-scripts [REGEXP]
This command was formerly named "maintenance print section-scripts".
It is now generally useful and is no longer a maintenance-only command.
+collect[/s] EXPRESSIONS
+ The tracepoint collect command now takes an optional modifier "/s"
+ that directs it to dereference pointer-to-character types and
+ collect the bytes of memory up to a zero byte. The behavior is
+ similar to what you see when you use the regular print command on a
+ string. An optional integer following the "/s" sets a bound on the
+ number of bytes that will be collected.
+
* Tracepoints can now be enabled and disabled at any time after a trace
experiment has been started using the standard "enable" and "disable"
commands. It is now possible to start a trace experiment with no enabled
diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index bd8800c..e59c735 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -42,6 +42,9 @@
#include "cp-support.h"
#include "arch-utils.h"
+#include "valprint.h"
+#include "c-lang.h"
+
/* To make sense of this file, you should read doc/agentexpr.texi.
Then look at the types and enums in ax-gdb.h. For the code itself,
look at gen_expr, towards the bottom; that's the main function that
@@ -335,6 +338,11 @@ maybe_const_expr (union exp_element **pc)
emits the trace bytecodes at the appropriate points. */
int trace_kludge;
+/* Inspired by trace_kludge, this indicates that pointers to chars
+ should get an added tracenz bytecode to record nonzero bytes, up to
+ a length that is the value of trace_string_kludge. */
+int trace_string_kludge;
+
/* Scan for all static fields in the given class, including any base
classes, and generate tracing bytecodes for each. */
@@ -393,19 +401,35 @@ static void
gen_traced_pop (struct gdbarch *gdbarch,
struct agent_expr *ax, struct axs_value *value)
{
+ int string_trace = 0;
+ if (trace_string_kludge
+ && TYPE_CODE (value->type) == TYPE_CODE_PTR
+ && c_textual_element_type (check_typedef (TYPE_TARGET_TYPE (value->type)),
+ 's'))
+ string_trace = 1;
+
if (trace_kludge)
switch (value->kind)
{
case axs_rvalue:
- /* We don't trace rvalues, just the lvalues necessary to
- produce them. So just dispose of this value. */
- ax_simple (ax, aop_pop);
+ if (string_trace)
+ {
+ ax_const_l (ax, trace_string_kludge);
+ ax_simple (ax, aop_tracenz);
+ }
+ else
+ /* We don't trace rvalues, just the lvalues necessary to
+ produce them. So just dispose of this value. */
+ ax_simple (ax, aop_pop);
break;
case axs_lvalue_memory:
{
int length = TYPE_LENGTH (check_typedef (value->type));
+ if (string_trace)
+ ax_simple (ax, aop_dup);
+
/* There's no point in trying to use a trace_quick bytecode
here, since "trace_quick SIZE pop" is three bytes, whereas
"const8 SIZE trace" is also three bytes, does the same
@@ -413,6 +437,13 @@ gen_traced_pop (struct gdbarch *gdbarch,
work correctly for objects with large sizes. */
ax_const_l (ax, length);
ax_simple (ax, aop_trace);
+
+ if (string_trace)
+ {
+ ax_simple (ax, aop_ref32);
+ ax_const_l (ax, trace_string_kludge);
+ ax_simple (ax, aop_tracenz);
+ }
}
break;
@@ -422,6 +453,15 @@ gen_traced_pop (struct gdbarch *gdbarch,
larger than will fit in a stack, so just mark it for
collection and be done with it. */
ax_reg_mask (ax, value->u.reg);
+
+ /* But if the register points to a string, assume the value
+ will fit on the stack and push it anyway. */
+ if (string_trace)
+ {
+ ax_reg (ax, value->u.reg);
+ ax_const_l (ax, trace_string_kludge);
+ ax_simple (ax, aop_tracenz);
+ }
break;
}
else
@@ -2489,6 +2529,10 @@ agent_command (char *exp, int from_tty)
if (exp == 0)
error_no_arg (_("expression to translate"));
+ trace_string_kludge = 0;
+ if (*exp == '/')
+ exp = decode_agent_options (exp);
+
/* Recognize the return address collection directive specially. Note
that it is not really an expression of any sort. */
if (strcmp (exp, "$_ret") == 0)
diff --git a/gdb/ax-gdb.h b/gdb/ax-gdb.h
index a25d994..951ec1f 100644
--- a/gdb/ax-gdb.h
+++ b/gdb/ax-gdb.h
@@ -112,5 +112,6 @@ extern struct agent_expr *gen_trace_for_return_address (CORE_ADDR,
extern struct agent_expr *gen_eval_for_expr (CORE_ADDR, struct expression *);
extern int trace_kludge;
+extern int trace_string_kludge;
#endif /* AX_GDB_H */
diff --git a/gdb/common/ax.def b/gdb/common/ax.def
index 5fe2ebf..d2e1b4f 100644
--- a/gdb/common/ax.def
+++ b/gdb/common/ax.def
@@ -86,8 +86,7 @@ DEFOP (swap, 0, 0, 2, 2, 0x2b)
DEFOP (getv, 2, 0, 0, 1, 0x2c)
DEFOP (setv, 2, 0, 0, 1, 0x2d)
DEFOP (tracev, 2, 0, 0, 1, 0x2e)
-/* We need something here just to make the tables come out ok. */
-DEFOP (invalid, 0, 0, 0, 0, 0x2f)
+DEFOP (tracenz, 0, 0, 2, 0, 0x2f)
DEFOP (trace16, 2, 0, 1, 1, 0x30)
/* We need something here just to make the tables come out ok. */
DEFOP (invalid2, 0, 0, 0, 0, 0x31)
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 1108974..f459be2 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,9 @@
+2011-11-02 Stan Shebs <stan@codesourcery.com>
+
+ * gdb.texinfo (Tracepoint Action Lists): Document collect/s.
+ (General Query Packets): Describe tracenz feature.
+ * agentexpr.texi (Bytecode Descriptions): Describe tracenz.
+
2011-10-28 Paul Koning <paul_koning@dell.com>
* gdb.texinfo (gdb.types): Rename deepitems to deep_items.
diff --git a/gdb/doc/agentexpr.texi b/gdb/doc/agentexpr.texi
index f2d51b7..2104235 100644
--- a/gdb/doc/agentexpr.texi
+++ b/gdb/doc/agentexpr.texi
@@ -489,6 +489,11 @@ named @code{trace_quick16}, for consistency.
Record the value of trace state variable number @var{n} in the trace
buffer. The handling of @var{n} is as described for @code{getv}.
+@item @code{tracenz} (0x2f) @var{addr} @var{size} @result{}
+Record the bytes at @var{addr} in a trace buffer, for later retrieval
+by GDB. Stop at either the first zero byte, or when @var{size} bytes
+have been recorded, whichever occurs first.
+
@item @code{end} (0x27): @result{}
Stop executing bytecode; the result should be the top element of the
stack. If the purpose of the expression was to compute an lvalue or a
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 0f37e6e..19236b3 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -10666,7 +10666,7 @@ end
@end smallexample
@kindex collect @r{(tracepoints)}
-@item collect @var{expr1}, @var{expr2}, @dots{}
+@item collect@r{[}/@var{mods}@r{]} @var{expr1}, @var{expr2}, @dots{}
Collect values of the given expressions when the tracepoint is hit.
This command accepts a comma-separated list of any valid expressions.
In addition to global, static, or local variables, the following
@@ -10712,6 +10712,15 @@ You can give several consecutive @code{collect} commands, each one
with a single argument, or one @code{collect} command with several
arguments separated by commas; the effect is the same.
+The optional @var{mods} changes the usual handling of the arguments.
+@code{s} requests that pointers to chars be handled as strings, in
+particular collecting the contents of the memory being pointed at, up
+to the first zero. The upper bound is by default the value of the
+@code{print elements} variable; if @code{s} is followed by a decimal
+number, that is the upper bound instead. So for instance
+@samp{collect/s25 mystr} collects as many as 25 characters at
+@samp{mystr}.
+
The command @code{info scope} (@pxref{Symbols, info scope}) is
particularly useful for figuring out what data to collect.
@@ -34707,6 +34716,11 @@ These are the currently defined stub features and their properties:
@tab @samp{-}
@tab No
+@item @samp{tracenz}
+@tab No
+@tab @samp{-}
+@tab No
+
@end multitable
These are the currently defined stub features, in more detail:
@@ -34831,6 +34845,11 @@ The remote stub supports the @samp{QTEnable} (@pxref{QTEnable}) and
@samp{QTDisable} (@pxref{QTDisable}) packets that allow tracepoints
to be enabled and disabled while a trace experiment is running.
+@item tracenz
+@cindex string tracing, in remote protocol
+The remote stub supports the @samp{tracenz} bytecode for collecting strings.
+See @ref{Bytecode Descriptions} for details about the bytecode.
+
@end table
@item qSymbol::
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index e04cacc..cb2412e 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,9 @@
+2011-11-02 Stan Shebs <stan@codesourcery.com>
+
+ * tracepoint.c (agent_mem_read_string): New function.
+ (eval_agent_expr): Call it for tracenz.
+ * server.c (handle_query): Report support for tracenz.
+
2011-11-02 Yao Qi <yao@codesourcery.com>
* tracepoint.c (cmd_qtstart): Remove unused local variables.
diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 5ba08ea..4612457 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -1587,6 +1587,7 @@ handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
strcat (own_buf, ";qXfer:statictrace:read+");
strcat (own_buf, ";qXfer:traceframe-info:read+");
strcat (own_buf, ";EnableDisableTracepoints+");
+ strcat (own_buf, ";tracenz+");
}
return;
diff --git a/gdb/gdbserver/tracepoint.c b/gdb/gdbserver/tracepoint.c
index eaa54f5..139e30e 100644
--- a/gdb/gdbserver/tracepoint.c
+++ b/gdb/gdbserver/tracepoint.c
@@ -1209,6 +1209,9 @@ static enum eval_result_type eval_agent_expr (struct tracepoint_hit_ctx *ctx,
static int agent_mem_read (struct traceframe *tframe,
unsigned char *to, CORE_ADDR from, ULONGEST len);
+static int agent_mem_read_string (struct traceframe *tframe,
+ unsigned char *to, CORE_ADDR from,
+ ULONGEST len);
static int agent_tsv_read (struct traceframe *tframe, int n);
#ifndef IN_PROCESS_AGENT
@@ -4644,6 +4647,13 @@ eval_agent_expr (struct tracepoint_hit_ctx *ctx,
agent_tsv_read (tframe, arg);
break;
+ case gdb_agent_op_tracenz:
+ agent_mem_read_string (tframe, NULL, (CORE_ADDR) stack[--sp],
+ (ULONGEST) top);
+ if (--sp >= 0)
+ top = stack[sp];
+ break;
+
/* GDB never (currently) generates any of these ops. */
case gdb_agent_op_float:
case gdb_agent_op_ref_float:
@@ -4727,6 +4737,66 @@ agent_mem_read (struct traceframe *tframe,
return 0;
}
+static int
+agent_mem_read_string (struct traceframe *tframe,
+ unsigned char *to, CORE_ADDR from, ULONGEST len)
+{
+ unsigned char *buf, *mspace;
+ ULONGEST remaining = len;
+ unsigned short blocklen, i;
+
+ /* To save a bit of space, block lengths are 16-bit, so break large
+ requests into multiple blocks. Bordering on overkill for strings,
+ but it could happen that someone specifies a large max length. */
+ while (remaining > 0)
+ {
+ size_t sp;
+
+ blocklen = (remaining > 65535 ? 65535 : remaining);
+ /* We want working space to accumulate nonzero bytes, since
+ traceframes must have a predecided size (otherwise it gets
+ harder to wrap correctly for the circular case, etc). */
+ buf = (unsigned char *) xmalloc (blocklen + 1);
+ for (i = 0; i < blocklen; ++i)
+ {
+ /* Read the string one byte at a time, in case the string is
+ at the end of a valid memory area - we don't want a
+ correctly-terminated string to engender segvio
+ complaints. */
+ read_inferior_memory (from + i, buf + i, 1);
+
+ if (buf[i] == '\0')
+ {
+ blocklen = i + 1;
+ /* Make sure outer loop stops now too. */
+ remaining = blocklen;
+ break;
+ }
+ }
+ sp = 1 + sizeof (from) + sizeof (blocklen) + blocklen;
+ mspace = add_traceframe_block (tframe, sp);
+ if (mspace == NULL)
+ {
+ xfree (buf);
+ return 1;
+ }
+ /* Identify block as a memory block. */
+ *mspace = 'M';
+ ++mspace;
+ /* Record address and size. */
+ memcpy ((void *) mspace, (void *) &from, sizeof (from));
+ mspace += sizeof (from);
+ memcpy ((void *) mspace, (void *) &blocklen, sizeof (blocklen));
+ mspace += sizeof (blocklen);
+ /* Copy the string contents. */
+ memcpy ((void *) mspace, (void *) buf, blocklen);
+ remaining -= blocklen;
+ from += blocklen;
+ xfree (buf);
+ }
+ return 0;
+}
+
/* Record the value of a trace state variable. */
static int
diff --git a/gdb/remote.c b/gdb/remote.c
index d9cc97c..5182ef1 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -331,6 +331,9 @@ struct remote_state
tracepoints while a trace experiment is running. */
int enable_disable_tracepoints;
+ /* True if the stub can collect strings using tracenz bytecode. */
+ int string_tracing;
+
/* Nonzero if the user has pressed Ctrl-C, but the target hasn't
responded to that. */
int ctrlc_pending_p;
@@ -3712,6 +3715,16 @@ remote_enable_disable_tracepoint_feature (const struct protocol_feature *feature
rs->enable_disable_tracepoints = (support == PACKET_ENABLE);
}
+static void
+remote_string_tracing_feature (const struct protocol_feature *feature,
+ enum packet_support support,
+ const char *value)
+{
+ struct remote_state *rs = get_remote_state ();
+
+ rs->string_tracing = (support == PACKET_ENABLE);
+}
+
static struct protocol_feature remote_protocol_features[] = {
{ "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
{ "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
@@ -3764,6 +3777,8 @@ static struct protocol_feature remote_protocol_features[] = {
PACKET_qXfer_fdpic },
{ "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
PACKET_QDisableRandomization },
+ { "tracenz", PACKET_DISABLE,
+ remote_string_tracing_feature, -1 },
};
static char *remote_support_xml;
@@ -9740,6 +9755,14 @@ remote_supports_enable_disable_tracepoint (void)
return rs->enable_disable_tracepoints;
}
+static int
+remote_supports_string_tracing (void)
+{
+ struct remote_state *rs = get_remote_state ();
+
+ return rs->string_tracing;
+}
+
static void
remote_trace_init (void)
{
@@ -10459,6 +10482,7 @@ Specify the serial device it is connected to\n\
remote_ops.to_supports_disable_randomization
= remote_supports_disable_randomization;
remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
+ remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
remote_ops.to_trace_init = remote_trace_init;
remote_ops.to_download_tracepoint = remote_download_tracepoint;
remote_ops.to_download_trace_state_variable
diff --git a/gdb/target.c b/gdb/target.c
index e6328a1..41ff6cf 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -672,6 +672,7 @@ update_current_target (void)
/* Do not inherit to_search_memory. */
INHERIT (to_supports_multi_process, t);
INHERIT (to_supports_enable_disable_tracepoint, t);
+ INHERIT (to_supports_string_tracing, t);
INHERIT (to_trace_init, t);
INHERIT (to_download_tracepoint, t);
INHERIT (to_download_trace_state_variable, t);
@@ -840,6 +841,9 @@ update_current_target (void)
de_fault (to_supports_enable_disable_tracepoint,
(int (*) (void))
return_zero);
+ de_fault (to_supports_string_tracing,
+ (int (*) (void))
+ return_zero);
de_fault (to_trace_init,
(void (*) (void))
tcomplain);
diff --git a/gdb/target.h b/gdb/target.h
index af7d3d9..352f2df 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -659,6 +659,9 @@ struct target_ops
/* Does this target support disabling address space randomization? */
int (*to_supports_disable_randomization) (void);
+ /* Does this target support the tracenz bytecode for string collection? */
+ int (*to_supports_string_tracing) (void);
+
/* Determine current architecture of thread PTID.
The target is supposed to determine the architecture of the code where
@@ -904,6 +907,9 @@ int target_supports_disable_randomization (void);
#define target_supports_enable_disable_tracepoint() \
(*current_target.to_supports_enable_disable_tracepoint) ()
+#define target_supports_string_tracing() \
+ (*current_target.to_supports_string_tracing) ()
+
/* Invalidate all target dcaches. */
extern void target_dcache_invalidate (void);
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index af1be7b..01c7705 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-11-02 Stan Shebs <stan@codesourcery.com>
+
+ * gdb.trace/collection.c: Add code using strings.
+ * gdb.trace/collection.exp: Add tests of string collection.
+
2011-11-02 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.base/skip-solib.exp (executable_main): New variable.
diff --git a/gdb/testsuite/gdb.trace/collection.c b/gdb/testsuite/gdb.trace/collection.c
index 6c66637..5901baf 100644
--- a/gdb/testsuite/gdb.trace/collection.c
+++ b/gdb/testsuite/gdb.trace/collection.c
@@ -201,6 +201,21 @@ int globals_test_func ()
return i; /* Set_Tracepoint_Here */
}
+int strings_test_func ()
+{
+ int i = 0;
+ char *locstr, *longloc;
+
+ locstr = "abcdef";
+ longloc = malloc(500);
+ strcpy(longloc, "how now brown cow spam spam spam wonderful wonderful spam");
+
+ i += strlen (locstr);
+ i += strlen (longloc);
+
+ return i; /* Set_Tracepoint_Here */
+}
+
int
main (argc, argv, envp)
int argc;
@@ -263,6 +278,7 @@ main (argc, argv, envp)
i += reglocal_test_func ();
i += statlocal_test_func ();
i += globals_test_func ();
+ i += strings_test_func ();
/* Values of globals at end of test should be different from
values that they had when trace data was captured. */
diff --git a/gdb/testsuite/gdb.trace/collection.exp b/gdb/testsuite/gdb.trace/collection.exp
index 6b73184..b1ed30a 100644
--- a/gdb/testsuite/gdb.trace/collection.exp
+++ b/gdb/testsuite/gdb.trace/collection.exp
@@ -619,6 +619,49 @@ proc gdb_collect_return_test { } {
"collect \$_ret: cease trace debugging"
}
+proc gdb_collect_strings_test { func mystr myrslt mylim msg } {
+ global hex
+ global cr
+ global gdb_prompt
+
+ prepare_for_trace_test
+
+ # Find the comment-identified line for setting this tracepoint.
+ set testline 0
+ gdb_test_multiple "list $func, +30" "collect $msg: find tracepoint line" {
+ -re "\[\r\n\](\[0-9\]+)\[^\r\n\]+ Set_Tracepoint_Here .*$gdb_prompt" {
+ set testline $expect_out(1,string)
+ pass "collect $msg: find tracepoint line"
+ }
+ -re ".*$gdb_prompt " {
+ fail "collect $msg: find tracepoint line (skipping strings test)"
+ return
+ }
+ timeout {
+ fail "collect $msg: find tracepoint line (skipping strings test)"
+ return
+ }
+ }
+
+ gdb_test "trace $testline" \
+ "Tracepoint \[0-9\]+ at .*" \
+ "collect $msg: set tracepoint"
+ gdb_trace_setactions "collect $msg: define actions" \
+ "" \
+ "collect/s$mylim $mystr" "^$"
+
+ # Begin the test.
+ run_trace_experiment $msg $func
+
+ gdb_test "print $mystr" \
+ "\\$\[0-9\]+ = $hex \"$myrslt\".*$cr" \
+ "collect $msg: collected local string"
+
+ gdb_test "tfind none" \
+ "#0 end .*" \
+ "collect $msg: cease trace debugging"
+}
+
proc gdb_trace_collection_test {} {
global fpreg
global spreg
@@ -728,6 +771,13 @@ proc gdb_trace_collection_test {} {
"globalarr\[\(l6, l7\)\]" "7" "a\[\(b, c\)\]"
gdb_collect_return_test
+
+ gdb_collect_strings_test strings_test_func "locstr" "abcdef" "" \
+ "local string"
+
+ gdb_collect_strings_test strings_test_func "longloc" "how now brown c" 15 \
+ "long local string"
+
}
clean_restart $executable
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index d88fcd7..4ca4ec2 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -52,6 +52,7 @@
#include "ax-gdb.h"
#include "memrange.h"
#include "exceptions.h"
+#include "cli/cli-utils.h"
/* readline include files */
#include "readline/readline.h"
@@ -574,6 +575,46 @@ teval_pseudocommand (char *args, int from_tty)
error (_("This command can only be used in a tracepoint actions list."));
}
+/* Parse any collection options, such as /s for strings. */
+
+char *
+decode_agent_options (char *exp)
+{
+ struct value_print_options opts;
+
+ if (*exp != '/')
+ return exp;
+
+ /* Call this to borrow the print elements default for collection
+ size. */
+ get_user_print_options (&opts);
+
+ exp++;
+ if (*exp == 's')
+ {
+ if (target_supports_string_tracing ())
+ {
+ /* Allow an optional decimal number giving an explicit maximum
+ string length, defaulting it to the "print elements" value;
+ so "collect/s80 mystr" gets at most 80 bytes of string. */
+ trace_string_kludge = opts.print_max;
+ exp++;
+ if (*exp >= '0' && *exp <= '9')
+ trace_string_kludge = atoi (exp);
+ while (*exp >= '0' && *exp <= '9')
+ exp++;
+ }
+ else
+ error (_("Target does not support \"/s\" option for string tracing."));
+ }
+ else
+ error (_("Undefined collection format \"%c\"."), *exp);
+
+ exp = skip_spaces (exp);
+
+ return exp;
+}
+
/* Enter a list of actions for a tracepoint. */
static void
trace_actions_command (char *args, int from_tty)
@@ -656,6 +697,10 @@ validate_actionline (char **line, struct breakpoint *b)
if (cmd_cfunc_eq (c, collect_pseudocommand))
{
+ trace_string_kludge = 0;
+ if (*p == '/')
+ p = decode_agent_options (p);
+
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
@@ -1313,6 +1358,10 @@ encode_actions_1 (struct command_line *action,
if (cmd_cfunc_eq (cmd, collect_pseudocommand))
{
+ trace_string_kludge = 0;
+ if (*action_exp == '/')
+ action_exp = decode_agent_options (action_exp);
+
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
@@ -2581,6 +2630,9 @@ trace_dump_actions (struct command_line *action,
STEPPING_ACTIONS should be equal. */
if (stepping_frame == stepping_actions)
{
+ if (*action_exp == '/')
+ action_exp = decode_agent_options (action_exp);
+
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
diff --git a/gdb/tracepoint.h b/gdb/tracepoint.h
index 99d8922..bf8fa44 100644
--- a/gdb/tracepoint.h
+++ b/gdb/tracepoint.h
@@ -212,6 +212,9 @@ struct cleanup *make_cleanup_restore_current_traceframe (void);
struct cleanup *make_cleanup_restore_traceframe_number (void);
void free_actions (struct breakpoint *);
+
+extern char *decode_agent_options (char *exp);
+
extern void validate_actionline (char **, struct breakpoint *);
extern void end_actions_pseudocommand (char *args, int from_tty);