/* Trace file support in GDB.
- Copyright (C) 1997-2015 Free Software Foundation, Inc.
+ Copyright (C) 1997-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "tracefile.h"
-#include "ctf.h"
+#include "tracectf.h"
#include "exec.h"
#include "regcache.h"
+#include "gdbsupport/byte-vector.h"
+#include "gdbarch.h"
/* Helper macros. */
#define TRACE_WRITE_V_BLOCK(writer, num, val) \
writer->ops->frame_ops->write_v_block ((writer), (num), (val))
-/* Free trace file writer. */
+/* A unique pointer policy class for trace_file_writer. */
-static void
-trace_file_writer_xfree (void *arg)
+struct trace_file_writer_deleter
{
- struct trace_file_writer *writer = (struct trace_file_writer *) arg;
+ void operator() (struct trace_file_writer *writer)
+ {
+ writer->ops->dtor (writer);
+ xfree (writer);
+ }
+};
- writer->ops->dtor (writer);
- xfree (writer);
-}
+/* A unique_ptr specialization for trace_file_writer. */
+
+typedef std::unique_ptr<trace_file_writer, trace_file_writer_deleter>
+ trace_file_writer_up;
/* Save tracepoint data to file named FILENAME through WRITER. WRITER
determines the trace file format. If TARGET_DOES_SAVE is non-zero,
int target_does_save)
{
struct trace_status *ts = current_trace_status ();
- int status;
struct uploaded_tp *uploaded_tps = NULL, *utp;
struct uploaded_tsv *uploaded_tsvs = NULL, *utsv;
ULONGEST offset = 0;
#define MAX_TRACE_UPLOAD 2000
- gdb_byte buf[MAX_TRACE_UPLOAD];
- int written;
+ gdb::byte_vector buf (std::max (MAX_TRACE_UPLOAD, trace_regblock_size));
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
/* If the target is to save the data to a file on its own, then just
}
/* Get the trace status first before opening the file, so if the
- target is losing, we can get out without touching files. */
- status = target_get_trace_status (ts);
+ target is losing, we can get out without touching files. Since
+ we're just calling this for side effects, we ignore the
+ result. */
+ target_get_trace_status (ts);
writer->ops->start (writer, filename);
/* Write out the size of a register block. */
writer->ops->write_regblock_type (writer, trace_regblock_size);
+ /* Write out the target description info. */
+ writer->ops->write_tdesc (writer);
+
/* Write out status of the tracing run (aka "tstatus" info). */
writer->ops->write_status (writer, ts);
/* We ask for big blocks, in the hopes of efficiency, but
will take less if the target has packet size limitations
or some such. */
- gotten = target_get_raw_trace_data (buf, offset,
+ gotten = target_get_raw_trace_data (buf.data (), offset,
MAX_TRACE_UPLOAD);
if (gotten < 0)
error (_("Failure to get requested trace buffer data"));
if (gotten == 0)
break;
- writer->ops->write_trace_buffer (writer, buf, gotten);
+ writer->ops->write_trace_buffer (writer, buf.data (), gotten);
offset += gotten;
}
/* Parse the trace buffers according to how data are stored
in trace buffer in GDBserver. */
- gotten = target_get_raw_trace_data (buf, offset, 6);
+ gotten = target_get_raw_trace_data (buf.data (), offset, 6);
if (gotten == 0)
break;
/* Read the first six bytes in, which is the tracepoint
number and trace frame size. */
tp_num = (uint16_t)
- extract_unsigned_integer (&buf[0], 2, byte_order);
+ extract_unsigned_integer (&((buf.data ())[0]), 2, byte_order);
tf_size = (uint32_t)
- extract_unsigned_integer (&buf[2], 4, byte_order);
+ extract_unsigned_integer (&((buf.data ())[2]), 4, byte_order);
writer->ops->frame_ops->start (writer, tp_num);
gotten = 6;
/* We'll fetch one block each time, in order to
handle the extremely large 'M' block. We first
fetch one byte to get the type of the block. */
- gotten = target_get_raw_trace_data (buf, offset, 1);
+ gotten = target_get_raw_trace_data (buf.data (),
+ offset, 1);
if (gotten < 1)
error (_("Failure to get requested trace buffer data"));
{
case 'R':
gotten
- = target_get_raw_trace_data (buf, offset,
+ = target_get_raw_trace_data (buf.data (), offset,
trace_regblock_size);
if (gotten < trace_regblock_size)
error (_("Failure to get requested trace"
" buffer data"));
- TRACE_WRITE_R_BLOCK (writer, buf,
+ TRACE_WRITE_R_BLOCK (writer, buf.data (),
trace_regblock_size);
break;
case 'M':
LONGEST t;
int j;
- t = target_get_raw_trace_data (buf,offset, 10);
+ t = target_get_raw_trace_data (buf.data (),
+ offset, 10);
if (t < 10)
error (_("Failure to get requested trace"
" buffer data"));
gotten = 0;
addr = (ULONGEST)
- extract_unsigned_integer (buf, 8,
+ extract_unsigned_integer (buf.data (), 8,
byte_order);
mlen = (unsigned short)
- extract_unsigned_integer (&buf[8], 2,
+ extract_unsigned_integer (&((buf.data ())[8]), 2,
byte_order);
TRACE_WRITE_M_BLOCK_HEADER (writer, addr,
else
read_length = mlen - j;
- t = target_get_raw_trace_data (buf,
+ t = target_get_raw_trace_data (buf.data (),
offset + j,
read_length);
if (t < read_length)
error (_("Failure to get requested"
" trace buffer data"));
- TRACE_WRITE_M_BLOCK_MEMORY (writer, buf,
+ TRACE_WRITE_M_BLOCK_MEMORY (writer,
+ buf.data (),
read_length);
j += read_length;
LONGEST val;
gotten
- = target_get_raw_trace_data (buf, offset,
- 12);
+ = target_get_raw_trace_data (buf.data (),
+ offset, 12);
if (gotten < 12)
error (_("Failure to get requested"
" trace buffer data"));
- vnum = (int) extract_signed_integer (buf,
+ vnum = (int) extract_signed_integer (buf.data (),
4,
byte_order);
val
- = extract_signed_integer (&buf[4], 8,
- byte_order);
+ = extract_signed_integer (&((buf.data ())[4]),
+ 8, byte_order);
TRACE_WRITE_V_BLOCK (writer, vnum, val);
}
}
static void
-trace_save_command (char *args, int from_tty)
+tsave_command (const char *args, int from_tty)
{
int target_does_save = 0;
char **argv;
char *filename = NULL;
- struct cleanup *back_to;
int generate_ctf = 0;
- struct trace_file_writer *writer = NULL;
if (args == NULL)
error_no_arg (_("file in which to save trace data"));
- argv = gdb_buildargv (args);
- back_to = make_cleanup_freeargv (argv);
+ gdb_argv built_argv (args);
+ argv = built_argv.get ();
for (; *argv; ++argv)
{
if (strcmp (*argv, "-r") == 0)
target_does_save = 1;
- if (strcmp (*argv, "-ctf") == 0)
+ else if (strcmp (*argv, "-ctf") == 0)
generate_ctf = 1;
else if (**argv == '-')
error (_("unknown option `%s'"), *argv);
error_no_arg (_("file in which to save trace data"));
if (generate_ctf)
- writer = ctf_trace_file_writer_new ();
+ trace_save_ctf (filename, target_does_save);
else
- writer = tfile_trace_file_writer_new ();
-
- make_cleanup (trace_file_writer_xfree, writer);
-
- trace_save (filename, writer, target_does_save);
+ trace_save_tfile (filename, target_does_save);
if (from_tty)
printf_filtered (_("Trace data saved to %s '%s'.\n"),
generate_ctf ? "directory" : "file", filename);
-
- do_cleanups (back_to);
}
/* Save the trace data to file FILENAME of tfile format. */
void
trace_save_tfile (const char *filename, int target_does_save)
{
- struct trace_file_writer *writer;
- struct cleanup *back_to;
-
- writer = tfile_trace_file_writer_new ();
- back_to = make_cleanup (trace_file_writer_xfree, writer);
- trace_save (filename, writer, target_does_save);
- do_cleanups (back_to);
+ trace_file_writer_up writer (tfile_trace_file_writer_new ());
+ trace_save (filename, writer.get (), target_does_save);
}
/* Save the trace data to dir DIRNAME of ctf format. */
void
trace_save_ctf (const char *dirname, int target_does_save)
{
- struct trace_file_writer *writer;
- struct cleanup *back_to;
-
- writer = ctf_trace_file_writer_new ();
- back_to = make_cleanup (trace_file_writer_xfree, writer);
-
- trace_save (dirname, writer, target_does_save);
- do_cleanups (back_to);
+ trace_file_writer_up writer (ctf_trace_file_writer_new ());
+ trace_save (dirname, writer.get (), target_does_save);
}
/* Fetch register data from tracefile, shared for both tfile and
void
tracefile_fetch_registers (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- int regn, pc_regno;
+ struct gdbarch *gdbarch = regcache->arch ();
+ struct tracepoint *tp = get_tracepoint (get_tracepoint_number ());
+ int regn;
/* We get here if no register data has been found. Mark registers
as unavailable. */
for (regn = 0; regn < gdbarch_num_regs (gdbarch); regn++)
- regcache_raw_supply (regcache, regn, NULL);
+ regcache->raw_supply (regn, NULL);
/* We can often usefully guess that the PC is going to be the same
as the address of the tracepoint. */
- pc_regno = gdbarch_pc_regnum (gdbarch);
-
- /* XXX This guessing code below only works if the PC register isn't
- a pseudo-register. The value of a pseudo-register isn't stored
- in the (non-readonly) regcache -- instead it's recomputed
- (probably from some other cached raw register) whenever the
- register is read. This guesswork should probably move to some
- higher layer. */
- if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch))
+ if (tp == NULL || tp->loc == NULL)
return;
- if (regno == -1 || regno == pc_regno)
+ /* But don't try to guess if tracepoint is multi-location... */
+ if (tp->loc->next)
{
- struct tracepoint *tp = get_tracepoint (get_tracepoint_number ());
- gdb_byte *regs;
-
- if (tp && tp->base.loc)
- {
- /* But don't try to guess if tracepoint is multi-location... */
- if (tp->base.loc->next)
- {
- warning (_("Tracepoint %d has multiple "
- "locations, cannot infer $pc"),
- tp->base.number);
- return;
- }
- /* ... or does while-stepping. */
- if (tp->step_count > 0)
- {
- warning (_("Tracepoint %d does while-stepping, "
- "cannot infer $pc"),
- tp->base.number);
- return;
- }
-
- regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno));
- store_unsigned_integer (regs, register_size (gdbarch, pc_regno),
- gdbarch_byte_order (gdbarch),
- tp->base.loc->address);
- regcache_raw_supply (regcache, pc_regno, regs);
- }
+ warning (_("Tracepoint %d has multiple "
+ "locations, cannot infer $pc"),
+ tp->number);
+ return;
+ }
+ /* ... or does while-stepping. */
+ else if (tp->step_count > 0)
+ {
+ warning (_("Tracepoint %d does while-stepping, "
+ "cannot infer $pc"),
+ tp->number);
+ return;
}
+
+ /* Guess what we can from the tracepoint location. */
+ gdbarch_guess_tracepoint_registers (gdbarch, regcache,
+ tp->loc->address);
}
/* This is the implementation of target_ops method to_has_all_memory. */
-static int
-tracefile_has_all_memory (struct target_ops *ops)
+bool
+tracefile_target::has_all_memory ()
{
return 1;
}
/* This is the implementation of target_ops method to_has_memory. */
-static int
-tracefile_has_memory (struct target_ops *ops)
+bool
+tracefile_target::has_memory ()
{
return 1;
}
The target has a stack when GDB has already selected one trace
frame. */
-static int
-tracefile_has_stack (struct target_ops *ops)
+bool
+tracefile_target::has_stack ()
{
return get_traceframe_number () != -1;
}
The target has registers when GDB has already selected one trace
frame. */
-static int
-tracefile_has_registers (struct target_ops *ops)
+bool
+tracefile_target::has_registers ()
{
return get_traceframe_number () != -1;
}
/* This is the implementation of target_ops method to_thread_alive.
tracefile has one thread faked by GDB. */
-static int
-tracefile_thread_alive (struct target_ops *ops, ptid_t ptid)
+bool
+tracefile_target::thread_alive (ptid_t ptid)
{
return 1;
}
/* This is the implementation of target_ops method to_get_trace_status.
The trace status for a file is that tracing can never be run. */
-static int
-tracefile_get_trace_status (struct target_ops *self, struct trace_status *ts)
+int
+tracefile_target::get_trace_status (struct trace_status *ts)
{
/* Other bits of trace status were collected as part of opening the
trace files, so nothing to do here. */
return -1;
}
-/* Initialize OPS for tracefile related targets. */
-
-void
-init_tracefile_ops (struct target_ops *ops)
-{
- ops->to_stratum = process_stratum;
- ops->to_get_trace_status = tracefile_get_trace_status;
- ops->to_has_all_memory = tracefile_has_all_memory;
- ops->to_has_memory = tracefile_has_memory;
- ops->to_has_stack = tracefile_has_stack;
- ops->to_has_registers = tracefile_has_registers;
- ops->to_thread_alive = tracefile_thread_alive;
- ops->to_magic = OPS_MAGIC;
-}
-
-extern initialize_file_ftype _initialize_tracefile;
-
+void _initialize_tracefile ();
void
-_initialize_tracefile (void)
+_initialize_tracefile ()
{
- add_com ("tsave", class_trace, trace_save_command, _("\
+ add_com ("tsave", class_trace, tsave_command, _("\
Save the trace data to a file.\n\
Use the '-ctf' option to save the data to CTF format.\n\
Use the '-r' option to direct the target to save directly to the file,\n\
projects / deliverable / binutils-gdb.git / blobdiff