#include <stdint.h>
#endif
-/* This file is built for both both GDBserver, and the in-process
+/* This file is built for both GDBserver, and the in-process
agent (IPA), a shared library that includes a tracing agent that is
loaded by the inferior to support fast tracepoints. Fast
tracepoints (or more accurately, jump based tracepoints) are
# define gdb_tp_heap_buffer gdb_agent_gdb_tp_heap_buffer
# define gdb_jump_pad_buffer gdb_agent_gdb_jump_pad_buffer
# define gdb_jump_pad_buffer_end gdb_agent_gdb_jump_pad_buffer_end
+# define gdb_trampoline_buffer gdb_agent_gdb_trampoline_buffer
+# define gdb_trampoline_buffer_end gdb_agent_gdb_trampoline_buffer_end
+# define gdb_trampoline_buffer_error gdb_agent_gdb_trampoline_buffer_error
# define collecting gdb_agent_collecting
# define gdb_collect gdb_agent_gdb_collect
# define stop_tracing gdb_agent_stop_tracing
CORE_ADDR addr_gdb_tp_heap_buffer;
CORE_ADDR addr_gdb_jump_pad_buffer;
CORE_ADDR addr_gdb_jump_pad_buffer_end;
+ CORE_ADDR addr_gdb_trampoline_buffer;
+ CORE_ADDR addr_gdb_trampoline_buffer_end;
+ CORE_ADDR addr_gdb_trampoline_buffer_error;
CORE_ADDR addr_collecting;
CORE_ADDR addr_gdb_collect;
CORE_ADDR addr_stop_tracing;
IPA_SYM(gdb_tp_heap_buffer),
IPA_SYM(gdb_jump_pad_buffer),
IPA_SYM(gdb_jump_pad_buffer_end),
+ IPA_SYM(gdb_trampoline_buffer),
+ IPA_SYM(gdb_trampoline_buffer_end),
+ IPA_SYM(gdb_trampoline_buffer_error),
IPA_SYM(collecting),
IPA_SYM(gdb_collect),
IPA_SYM(stop_tracing),
void
tracepoint_look_up_symbols (void)
{
- int all_ok;
int i;
if (all_tracepoint_symbols_looked_up)
return;
- all_ok = 1;
for (i = 0; i < sizeof (symbol_list) / sizeof (symbol_list[0]); i++)
{
CORE_ADDR *addrp =
{
if (debug_threads)
fprintf (stderr, "symbol `%s' not found\n", symbol_list[i].name);
- all_ok = 0;
+ return;
}
}
- all_tracepoint_symbols_looked_up = all_ok;
+ all_tracepoint_symbols_looked_up = 1;
}
#endif
#undef DEFOP
};
+static const unsigned char gdb_agent_op_sizes [gdb_agent_op_last] =
+ {
+ 0
+#define DEFOP(NAME, SIZE, DATA_SIZE, CONSUMED, PRODUCED, VALUE) , SIZE
+#include "ax.def"
+#undef DEFOP
+ };
+
struct agent_expr
{
int length;
CORE_ADDR jump_pad;
CORE_ADDR jump_pad_end;
+ /* The address range of the piece of the trampoline buffer that was
+ assigned to this fast tracepoint. (_end is actually one byte
+ past the end). */
+ CORE_ADDR trampoline;
+ CORE_ADDR trampoline_end;
+
/* The list of actions to take while in a stepping loop. These
fields are only valid for patch-based tracepoints. */
int num_step_actions;
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
#ifndef IN_PROCESS_AGENT
static struct tracepoint *fast_tracepoint_from_ipa_tpoint_address (CORE_ADDR);
+
+static void install_tracepoint (struct tracepoint *, char *own_buf);
+static void download_tracepoint (struct tracepoint *);
+static int install_fast_tracepoint (struct tracepoint *, char *errbuf);
#endif
#if defined(__GNUC__)
static int seen_step_action_flag;
-/* Create a tracepoint (location) with given number and address. */
+/* Create a tracepoint (location) with given number and address. Add this
+ new tracepoint to list and sort this list. */
static struct tracepoint *
add_tracepoint (int num, CORE_ADDR addr)
{
- struct tracepoint *tpoint;
+ struct tracepoint *tpoint, **tp_next;
tpoint = xmalloc (sizeof (struct tracepoint));
tpoint->number = num;
tpoint->handle = NULL;
tpoint->next = NULL;
- if (!last_tracepoint)
- tracepoints = tpoint;
- else
- last_tracepoint->next = tpoint;
+ /* Find a place to insert this tracepoint into list in order to keep
+ the tracepoint list still in the ascending order. There may be
+ multiple tracepoints at the same address as TPOINT's, and this
+ guarantees TPOINT is inserted after all the tracepoints which are
+ set at the same address. For example, fast tracepoints A, B, C are
+ set at the same address, and D is to be insert at the same place as
+ well,
+
+ -->| A |--> | B |-->| C |->...
+
+ One jump pad was created for tracepoint A, B, and C, and the target
+ address of A is referenced/used in jump pad. So jump pad will let
+ inferior jump to A. If D is inserted in front of A, like this,
+
+ -->| D |-->| A |--> | B |-->| C |->...
+
+ without updating jump pad, D is not reachable during collect, which
+ is wrong. As we can see, the order of B, C and D doesn't matter, but
+ A should always be the `first' one. */
+ for (tp_next = &tracepoints;
+ (*tp_next) != NULL && (*tp_next)->address <= tpoint->address;
+ tp_next = &(*tp_next)->next)
+ ;
+ tpoint->next = *tp_next;
+ *tp_next = tpoint;
last_tracepoint = tpoint;
seen_step_action_flag = 0;
/* Restore any bytes overwritten by tracepoints. */
for (tpoint = tracepoints; tpoint; tpoint = tpoint->next)
{
- if (!tpoint->enabled)
- continue;
-
/* Catch the case where we might try to remove a tracepoint that
was never actually installed. */
if (tpoint->handle == NULL)
cmd_qtdp (char *own_buf)
{
int tppacket;
+ /* Whether there is a trailing hyphen at the end of the QTDP packet. */
+ int trail_hyphen = 0;
ULONGEST num;
ULONGEST addr;
ULONGEST count;
trace_debug ("Unknown optional tracepoint field");
}
if (*packet == '-')
- trace_debug ("Also has actions\n");
+ {
+ trail_hyphen = 1;
+ trace_debug ("Also has actions\n");
+ }
trace_debug ("Defined %stracepoint %d at 0x%s, "
"enabled %d step %ld pass %ld",
return;
}
+ /* Install tracepoint during tracing only once for each tracepoint location.
+ For each tracepoint loc, GDB may send multiple QTDP packets, and we can
+ determine the last QTDP packet for one tracepoint location by checking
+ trailing hyphen in QTDP packet. */
+ if (tracing && !trail_hyphen)
+ {
+ /* Pause all threads temporarily while we patch tracepoints. */
+ pause_all (0);
+
+ /* download_tracepoint will update global `tracepoints'
+ list, so it is unsafe to leave threads in jump pad. */
+ stabilize_threads ();
+
+ /* Freeze threads. */
+ pause_all (1);
+
+ download_tracepoint (tpoint);
+ install_tracepoint (tpoint, own_buf);
+
+ unpause_all (1);
+ return;
+ }
+
write_ok (own_buf);
}
write_ok (own_buf);
}
+static void
+cmd_qtenable_disable (char *own_buf, int enable)
+{
+ char *packet = own_buf;
+ ULONGEST num, addr;
+ struct tracepoint *tp;
+
+ packet += strlen (enable ? "QTEnable:" : "QTDisable:");
+ packet = unpack_varlen_hex (packet, &num);
+ ++packet; /* skip a colon */
+ packet = unpack_varlen_hex (packet, &addr);
+
+ tp = find_tracepoint (num, addr);
+
+ if (tp)
+ {
+ if ((enable && tp->enabled) || (!enable && !tp->enabled))
+ {
+ trace_debug ("Tracepoint %d at 0x%s is already %s",
+ (int) num, paddress (addr),
+ enable ? "enabled" : "disabled");
+ write_ok (own_buf);
+ return;
+ }
+
+ trace_debug ("%s tracepoint %d at 0x%s",
+ enable ? "Enabling" : "Disabling",
+ (int) num, paddress (addr));
+
+ tp->enabled = enable;
+
+ if (tp->type == fast_tracepoint || tp->type == static_tracepoint)
+ {
+ int ret;
+ int offset = offsetof (struct tracepoint, enabled);
+ CORE_ADDR obj_addr = tp->obj_addr_on_target + offset;
+
+ ret = prepare_to_access_memory ();
+ if (ret)
+ {
+ trace_debug ("Failed to temporarily stop inferior threads");
+ write_enn (own_buf);
+ return;
+ }
+
+ ret = write_inferior_integer (obj_addr, enable);
+ done_accessing_memory ();
+
+ if (ret)
+ {
+ trace_debug ("Cannot write enabled flag into "
+ "inferior process memory");
+ write_enn (own_buf);
+ return;
+ }
+ }
+
+ write_ok (own_buf);
+ }
+ else
+ {
+ trace_debug ("Tracepoint %d at 0x%s not found",
+ (int) num, paddress (addr));
+ write_enn (own_buf);
+ }
+}
+
static void
cmd_qtv (char *own_buf)
{
char *packet = own_buf;
packet += strlen ("qTV:");
- packet = unpack_varlen_hex (packet, &num);
+ unpack_varlen_hex (packet, &num);
if (current_traceframe >= 0)
{
gdb_jump_pad_head += used;
}
-/* Sort tracepoints by PC, using a bubble sort. */
+static CORE_ADDR trampoline_buffer_head = 0;
+static CORE_ADDR trampoline_buffer_tail;
-static void
-sort_tracepoints (void)
+/* Reserve USED bytes from the trampoline buffer and return the
+ address of the start of the reserved space in TRAMPOLINE. Returns
+ non-zero if the space is successfully claimed. */
+
+int
+claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline)
{
- struct tracepoint *lst, *tmp, *prev = NULL;
- int i, j, n = 0;
+ if (!trampoline_buffer_head)
+ {
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer,
+ &trampoline_buffer_tail))
+ {
+ fatal ("error extracting trampoline_buffer");
+ return 0;
+ }
- if (tracepoints == NULL)
- return;
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer_end,
+ &trampoline_buffer_head))
+ {
+ fatal ("error extracting trampoline_buffer_end");
+ return 0;
+ }
+ }
- /* Count nodes. */
- for (tmp = tracepoints; tmp->next; tmp = tmp->next)
- n++;
+ /* Start claiming space from the top of the trampoline space. If
+ the space is located at the bottom of the virtual address space,
+ this reduces the possibility that corruption will occur if a null
+ pointer is used to write to memory. */
+ if (trampoline_buffer_head - trampoline_buffer_tail < used)
+ {
+ trace_debug ("claim_trampoline_space failed to reserve %s bytes",
+ pulongest (used));
+ return 0;
+ }
- for (i = 0; i < n - 1; i++)
- for (j = 0, lst = tracepoints;
- lst && lst->next && (j <= n - 1 - i);
- j++)
- {
- /* If we're at beginning, the start node is the prev
- node. */
- if (j == 0)
- prev = lst;
+ trampoline_buffer_head -= used;
- /* Compare neighbors. */
- if (lst->next->address < lst->address)
- {
- struct tracepoint *p;
+ trace_debug ("claim_trampoline_space reserves %s bytes at %s",
+ pulongest (used), paddress (trampoline_buffer_head));
- /* Swap'em. */
- tmp = (lst->next ? lst->next->next : NULL);
+ *trampoline = trampoline_buffer_head;
+ return 1;
+}
- if (j == 0 && prev == tracepoints)
- tracepoints = lst->next;
+/* Returns non-zero if there is space allocated for use in trampolines
+ for fast tracepoints. */
- p = lst->next;
- prev->next = lst->next;
- lst->next->next = lst;
- lst->next = tmp;
- prev = p;
- }
- else
- {
- lst = lst->next;
- /* Keep track of the previous node. We need it if we need
- to swap nodes. */
- if (j != 0)
- prev = prev->next;
- }
- }
+int
+have_fast_tracepoint_trampoline_buffer (char *buf)
+{
+ CORE_ADDR trampoline_end, errbuf;
+
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer_end,
+ &trampoline_end))
+ {
+ fatal ("error extracting trampoline_buffer_end");
+ return 0;
+ }
+
+ if (buf)
+ {
+ buf[0] = '\0';
+ strcpy (buf, "was claiming");
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer_error,
+ &errbuf))
+ {
+ fatal ("error extracting errbuf");
+ return 0;
+ }
+
+ read_inferior_memory (errbuf, (unsigned char *) buf, 100);
+ }
+
+ return trampoline_end != 0;
}
/* Ask the IPA to probe the marker at ADDRESS. Returns -1 if running
return err;
}
-#define MAX_JUMP_SIZE 20
-
static void
-cmd_qtstart (char *packet)
+clone_fast_tracepoint (struct tracepoint *to, const struct tracepoint *from)
{
- struct tracepoint *tpoint, *prev_ftpoint, *prev_stpoint;
- int slow_tracepoint_count, fast_count;
- CORE_ADDR jump_entry;
+ to->jump_pad = from->jump_pad;
+ to->jump_pad_end = from->jump_pad_end;
+ to->trampoline = from->trampoline;
+ to->trampoline_end = from->trampoline_end;
+ to->adjusted_insn_addr = from->adjusted_insn_addr;
+ to->adjusted_insn_addr_end = from->adjusted_insn_addr_end;
+ to->handle = from->handle;
+
+ gdb_assert (from->handle);
+ inc_ref_fast_tracepoint_jump ((struct fast_tracepoint_jump *) from->handle);
+}
+#define MAX_JUMP_SIZE 20
+
+/* Install fast tracepoint. Return 0 if successful, otherwise return
+ non-zero. */
+
+static int
+install_fast_tracepoint (struct tracepoint *tpoint, char *errbuf)
+{
+ CORE_ADDR jentry, jump_entry;
+ CORE_ADDR trampoline;
+ ULONGEST trampoline_size;
+ int err = 0;
/* The jump to the jump pad of the last fast tracepoint
installed. */
unsigned char fjump[MAX_JUMP_SIZE];
ULONGEST fjump_size;
- trace_debug ("Starting the trace");
+ if (tpoint->orig_size < target_get_min_fast_tracepoint_insn_len ())
+ {
+ trace_debug ("Requested a fast tracepoint on an instruction "
+ "that is of less than the minimum length.");
+ return 0;
+ }
+
+ jentry = jump_entry = get_jump_space_head ();
+
+ trampoline = 0;
+ trampoline_size = 0;
- slow_tracepoint_count = fast_count = 0;
+ /* Install the jump pad. */
+ err = install_fast_tracepoint_jump_pad (tpoint->obj_addr_on_target,
+ tpoint->address,
+ ipa_sym_addrs.addr_gdb_collect,
+ ipa_sym_addrs.addr_collecting,
+ tpoint->orig_size,
+ &jentry,
+ &trampoline, &trampoline_size,
+ fjump, &fjump_size,
+ &tpoint->adjusted_insn_addr,
+ &tpoint->adjusted_insn_addr_end,
+ errbuf);
- /* Sort tracepoints by ascending address. This makes installing
- fast tracepoints at the same address easier to handle. */
- sort_tracepoints ();
+ if (err)
+ return 1;
+
+ /* Wire it in. */
+ tpoint->handle = set_fast_tracepoint_jump (tpoint->address, fjump,
+ fjump_size);
+
+ if (tpoint->handle != NULL)
+ {
+ tpoint->jump_pad = jump_entry;
+ tpoint->jump_pad_end = jentry;
+ tpoint->trampoline = trampoline;
+ tpoint->trampoline_end = trampoline + trampoline_size;
+
+ /* Pad to 8-byte alignment. */
+ jentry = ((jentry + 7) & ~0x7);
+ claim_jump_space (jentry - jump_entry);
+ }
+
+ return 0;
+}
+
+
+/* Install tracepoint TPOINT, and write reply message in OWN_BUF. */
+
+static void
+install_tracepoint (struct tracepoint *tpoint, char *own_buf)
+{
+ tpoint->handle = NULL;
+ *own_buf = '\0';
+
+ if (tpoint->type == trap_tracepoint)
+ {
+ /* Tracepoints are installed as memory breakpoints. Just go
+ ahead and install the trap. The breakpoints module
+ handles duplicated breakpoints, and the memory read
+ routine handles un-patching traps from memory reads. */
+ tpoint->handle = set_breakpoint_at (tpoint->address,
+ tracepoint_handler);
+ }
+ else if (tpoint->type == fast_tracepoint || tpoint->type == static_tracepoint)
+ {
+ struct tracepoint *tp;
+
+ if (!in_process_agent_loaded ())
+ {
+ trace_debug ("Requested a %s tracepoint, but fast "
+ "tracepoints aren't supported.",
+ tpoint->type == static_tracepoint ? "static" : "fast");
+ write_e_ipa_not_loaded (own_buf);
+ return;
+ }
+ if (tpoint->type == static_tracepoint && !in_process_agent_loaded_ust ())
+ {
+ trace_debug ("Requested a static tracepoint, but static "
+ "tracepoints are not supported.");
+ write_e_ust_not_loaded (own_buf);
+ return;
+ }
+
+ /* Find another fast or static tracepoint at the same address. */
+ for (tp = tracepoints; tp; tp = tp->next)
+ {
+ if (tp->address == tpoint->address && tp->type == tpoint->type
+ && tp->number != tpoint->number)
+ break;
+ }
+
+ if (tpoint->type == fast_tracepoint)
+ {
+ if (tp) /* TPOINT is installed at the same address as TP. */
+ clone_fast_tracepoint (tpoint, tp);
+ else
+ install_fast_tracepoint (tpoint, own_buf);
+ }
+ else
+ {
+ if (tp)
+ tpoint->handle = (void *) -1;
+ else
+ {
+ if (probe_marker_at (tpoint->address, own_buf) == 0)
+ tpoint->handle = (void *) -1;
+ }
+ }
+
+ }
+ else
+ internal_error (__FILE__, __LINE__, "Unknown tracepoint type");
+
+ if (tpoint->handle == NULL)
+ {
+ if (*own_buf == '\0')
+ write_enn (own_buf);
+ }
+ else
+ write_ok (own_buf);
+}
+
+static void
+cmd_qtstart (char *packet)
+{
+ struct tracepoint *tpoint, *prev_ftpoint, *prev_stpoint;
+
+ trace_debug ("Starting the trace");
/* Pause all threads temporarily while we patch tracepoints. */
pause_all (0);
/* Ensure all the hit counts start at zero. */
tpoint->hit_count = 0;
- if (!tpoint->enabled)
- continue;
-
if (tpoint->type == trap_tracepoint)
{
- ++slow_tracepoint_count;
-
/* Tracepoints are installed as memory breakpoints. Just go
ahead and install the trap. The breakpoints module
handles duplicated breakpoints, and the memory read
}
else if (tpoint->type == fast_tracepoint)
{
- ++fast_count;
-
if (maybe_write_ipa_not_loaded (packet))
{
trace_debug ("Requested a fast tracepoint, but fast "
}
if (prev_ftpoint != NULL && prev_ftpoint->address == tpoint->address)
- {
- tpoint->handle = set_fast_tracepoint_jump (tpoint->address,
- fjump,
- fjump_size);
- tpoint->jump_pad = prev_ftpoint->jump_pad;
- tpoint->jump_pad_end = prev_ftpoint->jump_pad_end;
- tpoint->adjusted_insn_addr = prev_ftpoint->adjusted_insn_addr;
- tpoint->adjusted_insn_addr_end
- = prev_ftpoint->adjusted_insn_addr_end;
- }
+ clone_fast_tracepoint (tpoint, prev_ftpoint);
else
{
- CORE_ADDR jentry;
- int err = 0;
-
- prev_ftpoint = NULL;
-
- jentry = jump_entry = get_jump_space_head ();
-
- /* Install the jump pad. */
- err = install_fast_tracepoint_jump_pad
- (tpoint->obj_addr_on_target,
- tpoint->address,
- ipa_sym_addrs.addr_gdb_collect,
- ipa_sym_addrs.addr_collecting,
- tpoint->orig_size,
- &jentry,
- fjump, &fjump_size,
- &tpoint->adjusted_insn_addr,
- &tpoint->adjusted_insn_addr_end);
-
- /* Wire it in. */
- if (!err)
- tpoint->handle = set_fast_tracepoint_jump (tpoint->address,
- fjump, fjump_size);
-
- if (tpoint->handle != NULL)
- {
- tpoint->jump_pad = jump_entry;
- tpoint->jump_pad_end = jentry;
-
- /* Pad to 8-byte alignment. */
- jentry = ((jentry + 7) & ~0x7);
- claim_jump_space (jentry - jump_entry);
-
- /* So that we can handle multiple fast tracepoints
- at the same address easily. */
- prev_ftpoint = tpoint;
- }
+ if (install_fast_tracepoint (tpoint, packet) == 0)
+ prev_ftpoint = tpoint;
}
}
else if (tpoint->type == static_tracepoint)
if (strncmp (packet, "pc:", strlen ("pc:")) == 0)
{
packet += strlen ("pc:");
- packet = unpack_varlen_hex (packet, &pc);
+ unpack_varlen_hex (packet, &pc);
trace_debug ("Want to find next traceframe at pc=0x%s", paddress (pc));
tframe = find_next_traceframe_in_range (pc, pc, 1, &tfnum);
}
packet += strlen ("range:");
packet = unpack_varlen_hex (packet, &lo);
++packet;
- packet = unpack_varlen_hex (packet, &hi);
+ unpack_varlen_hex (packet, &hi);
trace_debug ("Want to find next traceframe in the range 0x%s to 0x%s",
paddress (lo), paddress (hi));
tframe = find_next_traceframe_in_range (lo, hi, 1, &tfnum);
packet += strlen ("outside:");
packet = unpack_varlen_hex (packet, &lo);
++packet;
- packet = unpack_varlen_hex (packet, &hi);
+ unpack_varlen_hex (packet, &hi);
trace_debug ("Want to find next traceframe "
"outside the range 0x%s to 0x%s",
paddress (lo), paddress (hi));
else if (strncmp (packet, "tdp:", strlen ("tdp:")) == 0)
{
packet += strlen ("tdp:");
- packet = unpack_varlen_hex (packet, &num);
+ unpack_varlen_hex (packet, &num);
tpnum = (int) num;
trace_debug ("Want to find next traceframe for tracepoint %d", tpnum);
tframe = find_next_traceframe_by_tracepoint (tpnum, &tfnum);
run_inferior_command (packet);
}
+/* Return the minimum instruction size needed for fast tracepoints as a
+ hexadecimal number. */
+
+static void
+cmd_qtminftpilen (char *packet)
+{
+ sprintf (packet, "%x", target_get_min_fast_tracepoint_insn_len ());
+}
+
/* Respond to qTBuffer packet with a block of raw data from the trace
buffer. GDB may ask for a lot, but we are allowed to reply with
only as much as will fit within packet limits or whatever. */
packet = unpack_varlen_hex (packet, &offset);
++packet; /* skip a comma */
- packet = unpack_varlen_hex (packet, &num);
+ unpack_varlen_hex (packet, &num);
trace_debug ("Want to get trace buffer, %d bytes at offset 0x%s",
(int) num, pulongest (offset));
if (strncmp ("circular:", packet, strlen ("circular:")) == 0)
{
packet += strlen ("circular:");
- packet = unpack_varlen_hex (packet, &val);
+ unpack_varlen_hex (packet, &val);
circular_trace_buffer = val;
trace_debug ("Trace buffer is now %s",
circular_trace_buffer ? "circular" : "linear");
cmd_qtdpsrc (packet);
return 1;
}
+ else if (strncmp ("QTEnable:", packet, strlen ("QTEnable:")) == 0)
+ {
+ cmd_qtenable_disable (packet, 1);
+ return 1;
+ }
+ else if (strncmp ("QTDisable:", packet, strlen ("QTDisable:")) == 0)
+ {
+ cmd_qtenable_disable (packet, 0);
+ return 1;
+ }
else if (strncmp ("QTDV:", packet, strlen ("QTDV:")) == 0)
{
cmd_qtdv (packet);
cmd_qtstmat (packet);
return 1;
}
+ else if (strcmp ("qTMinFTPILen", packet) == 0)
+ {
+ cmd_qtminftpilen (packet);
+ return 1;
+ }
return 0;
}
/* Unlink. */
*wstep_link = wstep->next;
release_while_stepping_state (wstep);
+ wstep = *wstep_link;
continue;
}
return gdb_agent_op_names[op];
}
-int
-tp_printf (const char *format, ...)
-{
- va_list ap;
- va_start (ap, format);
- vprintf (format, ap);
- va_end (ap);
- return 0;
-}
-
/* The agent expression evaluator, as specified by the GDB docs. It
returns 0 if everything went OK, and a nonzero error code
otherwise. */
agent_tsv_read (tframe, arg);
break;
- case gdb_agent_op_printf:
- {
- void *argv;
- arg = aexpr->bytes[pc++];
- argv = (void *) (unsigned long) top;
- if (--sp >= 0)
- top = stack[sp];
-
- if (arg)
- {
- if (strstr ((char *) (aexpr->bytes + pc), "%s"))
- {
- int i;
- unsigned char buf[100];
-
- for (i = 0; i < 100; i++)
- {
- agent_mem_read (tframe, buf + i,
- (CORE_ADDR) ((unsigned long)argv + i),
- 1);
- if (!buf[i])
- break;
- }
- tp_printf ((char *) (aexpr->bytes + pc), buf);
- }
- else
- tp_printf ((char *) (aexpr->bytes + pc), argv);
- }
- else
- tp_printf ((char *) (aexpr->bytes + pc));
- pc += strlen ((char *) aexpr->bytes + pc) + 1;
- }
+ 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. */
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
return NULL;
}
+/* Return the first fast tracepoint whose trampoline contains PC. */
+
+static struct tracepoint *
+fast_tracepoint_from_trampoline_address (CORE_ADDR pc)
+{
+ struct tracepoint *tpoint;
+
+ for (tpoint = tracepoints; tpoint; tpoint = tpoint->next)
+ {
+ if (tpoint->type == fast_tracepoint
+ && tpoint->trampoline <= pc && pc < tpoint->trampoline_end)
+ return tpoint;
+ }
+
+ return NULL;
+}
+
/* Return GDBserver's tracepoint that matches the IP Agent's
tracepoint object that lives at IPA_TPOINT_OBJ in the IP Agent's
address space. */
{
CORE_ADDR ipa_collecting;
CORE_ADDR ipa_gdb_jump_pad_buffer, ipa_gdb_jump_pad_buffer_end;
+ CORE_ADDR ipa_gdb_trampoline_buffer;
+ CORE_ADDR ipa_gdb_trampoline_buffer_end;
struct tracepoint *tpoint;
int needs_breakpoint;
&ipa_gdb_jump_pad_buffer_end))
fatal ("error extracting `gdb_jump_pad_buffer_end'");
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer,
+ &ipa_gdb_trampoline_buffer))
+ fatal ("error extracting `gdb_trampoline_buffer'");
+ if (read_inferior_data_pointer (ipa_sym_addrs.addr_gdb_trampoline_buffer_end,
+ &ipa_gdb_trampoline_buffer_end))
+ fatal ("error extracting `gdb_trampoline_buffer_end'");
+
if (ipa_gdb_jump_pad_buffer <= stop_pc
&& stop_pc < ipa_gdb_jump_pad_buffer_end)
{
&& stop_pc < tpoint->adjusted_insn_addr)
needs_breakpoint = 1;
}
+ else if (ipa_gdb_trampoline_buffer <= stop_pc
+ && stop_pc < ipa_gdb_trampoline_buffer_end)
+ {
+ /* We can tell which tracepoint(s) the thread is collecting by
+ matching the trampoline address back to the tracepoint. */
+ tpoint = fast_tracepoint_from_trampoline_address (stop_pc);
+ if (tpoint == NULL)
+ {
+ warning ("in trampoline, but no matching tpoint?");
+ return 0;
+ }
+ else
+ {
+ trace_debug ("in trampoline of tpoint (%d, %s); trampoline(%s, %s)",
+ tpoint->number, paddress (tpoint->address),
+ paddress (tpoint->trampoline),
+ paddress (tpoint->trampoline_end));
+ }
+
+ /* Have not reached jump pad yet, but treat the trampoline as a
+ part of the jump pad that is before the adjusted original
+ instruction. */
+ needs_breakpoint = 1;
+ }
else
{
collecting_t ipa_collecting_obj;
ctx.base.type = fast_tracepoint;
ctx.regs = regs;
ctx.regcache_initted = 0;
- ctx.tpoint = tpoint;
-
/* Wrap the regblock in a register cache (in the stack, we don't
want to malloc here). */
ctx.regspace = alloca (register_cache_size ());
return;
}
- /* Test the condition if present, and collect if true. */
- if (tpoint->cond == NULL
- || condition_true_at_tracepoint ((struct tracepoint_hit_ctx *) &ctx,
- tpoint))
+ for (ctx.tpoint = tpoint;
+ ctx.tpoint != NULL && ctx.tpoint->address == tpoint->address;
+ ctx.tpoint = ctx.tpoint->next)
{
- collect_data_at_tracepoint ((struct tracepoint_hit_ctx *) &ctx,
- tpoint->address, tpoint);
+ if (!ctx.tpoint->enabled)
+ continue;
- /* Note that this will cause original insns to be written back
- to where we jumped from, but that's OK because we're jumping
- back to the next whole instruction. This will go badly if
- instruction restoration is not atomic though. */
- if (stopping_tracepoint
- || trace_buffer_is_full
- || expr_eval_result != expr_eval_no_error)
- stop_tracing ();
- }
- else
- {
- /* If there was a condition and it evaluated to false, the only
- way we would stop tracing is if there was an error during
- condition expression evaluation. */
- if (expr_eval_result != expr_eval_no_error)
- stop_tracing ();
+ /* Multiple tracepoints of different types, such as fast tracepoint and
+ static tracepoint, can be set at the same address. */
+ if (ctx.tpoint->type != tpoint->type)
+ continue;
+
+ /* Test the condition if present, and collect if true. */
+ if (ctx.tpoint->cond == NULL
+ || condition_true_at_tracepoint ((struct tracepoint_hit_ctx *) &ctx,
+ ctx.tpoint))
+ {
+ collect_data_at_tracepoint ((struct tracepoint_hit_ctx *) &ctx,
+ ctx.tpoint->address, ctx.tpoint);
+
+ /* Note that this will cause original insns to be written back
+ to where we jumped from, but that's OK because we're jumping
+ back to the next whole instruction. This will go badly if
+ instruction restoration is not atomic though. */
+ if (stopping_tracepoint
+ || trace_buffer_is_full
+ || expr_eval_result != expr_eval_no_error)
+ {
+ stop_tracing ();
+ break;
+ }
+ }
+ else
+ {
+ /* If there was a condition and it evaluated to false, the only
+ way we would stop tracing is if there was an error during
+ condition expression evaluation. */
+ if (expr_eval_result != expr_eval_no_error)
+ {
+ stop_tracing ();
+ break;
+ }
+ }
}
}
target_emit_ops ()->emit_void_call_2 (fn, arg1);
}
+static void
+emit_eq_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_eq_goto (offset_p, size_p);
+}
+
+static void
+emit_ne_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_ne_goto (offset_p, size_p);
+}
+
+static void
+emit_lt_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_lt_goto (offset_p, size_p);
+}
+
+static void
+emit_ge_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_ge_goto (offset_p, size_p);
+}
+
+static void
+emit_gt_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_gt_goto (offset_p, size_p);
+}
+
+static void
+emit_le_goto (int *offset_p, int *size_p)
+{
+ target_emit_ops ()->emit_le_goto (offset_p, size_p);
+}
+
static enum eval_result_type compile_bytecodes (struct agent_expr *aexpr);
static void
*jump_entry += 16;
}
+/* Scan an agent expression for any evidence that the given PC is the
+ target of a jump bytecode in the expression. */
+
+int
+is_goto_target (struct agent_expr *aexpr, int pc)
+{
+ int i;
+ unsigned char op;
+
+ for (i = 0; i < aexpr->length; i += 1 + gdb_agent_op_sizes[op])
+ {
+ op = aexpr->bytes[i];
+
+ if (op == gdb_agent_op_goto || op == gdb_agent_op_if_goto)
+ {
+ int target = (aexpr->bytes[i + 1] << 8) + aexpr->bytes[i + 2];
+ if (target == pc)
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
/* Given an agent expression, turn it into native code. */
static enum eval_result_type
{
int pc = 0;
int done = 0;
- unsigned char op;
+ unsigned char op, next_op;
int arg;
/* This is only used to build 64-bit value for constants. */
ULONGEST top;
break;
case gdb_agent_op_equal:
- emit_equal ();
+ next_op = aexpr->bytes[pc];
+ if (next_op == gdb_agent_op_if_goto
+ && !is_goto_target (aexpr, pc)
+ && target_emit_ops ()->emit_eq_goto)
+ {
+ trace_debug ("Combining equal & if_goto");
+ pc += 1;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_eq_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else if (next_op == gdb_agent_op_log_not
+ && (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
+ && !is_goto_target (aexpr, pc + 1)
+ && target_emit_ops ()->emit_ne_goto)
+ {
+ trace_debug ("Combining equal & log_not & if_goto");
+ pc += 2;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_ne_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else
+ emit_equal ();
break;
case gdb_agent_op_less_signed:
- emit_less_signed ();
+ next_op = aexpr->bytes[pc];
+ if (next_op == gdb_agent_op_if_goto
+ && !is_goto_target (aexpr, pc))
+ {
+ trace_debug ("Combining less_signed & if_goto");
+ pc += 1;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_lt_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else if (next_op == gdb_agent_op_log_not
+ && !is_goto_target (aexpr, pc)
+ && (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
+ && !is_goto_target (aexpr, pc + 1))
+ {
+ trace_debug ("Combining less_signed & log_not & if_goto");
+ pc += 2;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_ge_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else
+ emit_less_signed ();
break;
case gdb_agent_op_less_unsigned:
break;
case gdb_agent_op_swap:
- emit_swap ();
+ next_op = aexpr->bytes[pc];
+ /* Detect greater-than comparison sequences. */
+ if (next_op == gdb_agent_op_less_signed
+ && !is_goto_target (aexpr, pc)
+ && (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
+ && !is_goto_target (aexpr, pc + 1))
+ {
+ trace_debug ("Combining swap & less_signed & if_goto");
+ pc += 2;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_gt_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else if (next_op == gdb_agent_op_less_signed
+ && !is_goto_target (aexpr, pc)
+ && (aexpr->bytes[pc + 1] == gdb_agent_op_log_not)
+ && !is_goto_target (aexpr, pc + 1)
+ && (aexpr->bytes[pc + 2] == gdb_agent_op_if_goto)
+ && !is_goto_target (aexpr, pc + 2))
+ {
+ trace_debug ("Combining swap & less_signed & log_not & if_goto");
+ pc += 3;
+ aentry->pc = pc;
+ arg = aexpr->bytes[pc++];
+ arg = (arg << 8) + aexpr->bytes[pc++];
+ aentry->goto_pc = arg;
+ emit_le_goto (&(aentry->from_offset), &(aentry->from_size));
+ }
+ else
+ emit_swap ();
break;
case gdb_agent_op_getv:
/* Align V up to N bits. */
#define UALIGN(V, N) (((V) + ((N) - 1)) & ~((N) - 1))
+/* Sync tracepoint with IPA, but leave maintenance of linked list to caller. */
+
static void
-download_tracepoints (void)
+download_tracepoint_1 (struct tracepoint *tpoint)
{
- CORE_ADDR tpptr = 0, prev_tpptr = 0;
- struct tracepoint *tpoint;
+ struct tracepoint target_tracepoint;
+ CORE_ADDR tpptr = 0;
- /* Start out empty. */
- write_inferior_data_ptr (ipa_sym_addrs.addr_tracepoints, 0);
+ gdb_assert (tpoint->type == fast_tracepoint
+ || tpoint->type == static_tracepoint);
- for (tpoint = tracepoints; tpoint; tpoint = tpoint->next)
+ if (tpoint->cond != NULL && target_emit_ops () != NULL)
{
- struct tracepoint target_tracepoint;
+ CORE_ADDR jentry, jump_entry;
- if (tpoint->type != fast_tracepoint
- && tpoint->type != static_tracepoint)
- continue;
+ jentry = jump_entry = get_jump_space_head ();
- /* Maybe download a compiled condition. */
- if (tpoint->cond != NULL && target_emit_ops () != NULL)
+ if (tpoint->cond != NULL)
{
- CORE_ADDR jentry, jump_entry;
+ /* Pad to 8-byte alignment. (needed?) */
+ /* Actually this should be left for the target to
+ decide. */
+ jentry = UALIGN (jentry, 8);
+
+ compile_tracepoint_condition (tpoint, &jentry);
+ }
+
+ /* Pad to 8-byte alignment. */
+ jentry = UALIGN (jentry, 8);
+ claim_jump_space (jentry - jump_entry);
+ }
+
+ target_tracepoint = *tpoint;
+
+ tpptr = target_malloc (sizeof (*tpoint));
+ tpoint->obj_addr_on_target = tpptr;
+
+ /* Write the whole object. We'll fix up its pointers in a bit.
+ Assume no next for now. This is fixed up above on the next
+ iteration, if there's any. */
+ target_tracepoint.next = NULL;
+ /* Need to clear this here too, since we're downloading the
+ tracepoints before clearing our own copy. */
+ target_tracepoint.hit_count = 0;
+
+ write_inferior_memory (tpptr, (unsigned char *) &target_tracepoint,
+ sizeof (target_tracepoint));
+
+ if (tpoint->cond)
+ write_inferior_data_ptr (tpptr + offsetof (struct tracepoint,
+ cond),
+ download_agent_expr (tpoint->cond));
+
+ if (tpoint->numactions)
+ {
+ int i;
+ CORE_ADDR actions_array;
- jentry = jump_entry = get_jump_space_head ();
+ /* The pointers array. */
+ actions_array
+ = target_malloc (sizeof (*tpoint->actions) * tpoint->numactions);
+ write_inferior_data_ptr (tpptr + offsetof (struct tracepoint,
+ actions),
+ actions_array);
- if (tpoint->cond != NULL)
+ /* Now for each pointer, download the action. */
+ for (i = 0; i < tpoint->numactions; i++)
+ {
+ CORE_ADDR ipa_action = 0;
+ struct tracepoint_action *action = tpoint->actions[i];
+
+ switch (action->type)
{
- /* Pad to 8-byte alignment. (needed?) */
- /* Actually this should be left for the target to
- decide. */
- jentry = UALIGN (jentry, 8);
+ case 'M':
+ ipa_action
+ = target_malloc (sizeof (struct collect_memory_action));
+ write_inferior_memory (ipa_action,
+ (unsigned char *) action,
+ sizeof (struct collect_memory_action));
+ break;
+ case 'R':
+ ipa_action
+ = target_malloc (sizeof (struct collect_registers_action));
+ write_inferior_memory (ipa_action,
+ (unsigned char *) action,
+ sizeof (struct collect_registers_action));
+ break;
+ case 'X':
+ {
+ CORE_ADDR expr;
+ struct eval_expr_action *eaction
+ = (struct eval_expr_action *) action;
+
+ ipa_action = target_malloc (sizeof (*eaction));
+ write_inferior_memory (ipa_action,
+ (unsigned char *) eaction,
+ sizeof (*eaction));
- compile_tracepoint_condition (tpoint, &jentry);
+ expr = download_agent_expr (eaction->expr);
+ write_inferior_data_ptr
+ (ipa_action + offsetof (struct eval_expr_action, expr),
+ expr);
+ break;
+ }
+ case 'L':
+ ipa_action = target_malloc
+ (sizeof (struct collect_static_trace_data_action));
+ write_inferior_memory
+ (ipa_action,
+ (unsigned char *) action,
+ sizeof (struct collect_static_trace_data_action));
+ break;
+ default:
+ trace_debug ("unknown trace action '%c', ignoring",
+ action->type);
+ break;
}
- /* Pad to 8-byte alignment. */
- jentry = UALIGN (jentry, 8);
- claim_jump_space (jentry - jump_entry);
+ if (ipa_action != 0)
+ write_inferior_data_ptr
+ (actions_array + i * sizeof (sizeof (*tpoint->actions)),
+ ipa_action);
}
+ }
+}
- target_tracepoint = *tpoint;
+static void
+download_tracepoint (struct tracepoint *tpoint)
+{
+ struct tracepoint *tp, *tp_prev;
+
+ if (tpoint->type != fast_tracepoint
+ && tpoint->type != static_tracepoint)
+ return;
+
+ download_tracepoint_1 (tpoint);
+
+ /* Find the previous entry of TPOINT, which is fast tracepoint or
+ static tracepoint. */
+ tp_prev = NULL;
+ for (tp = tracepoints; tp != tpoint; tp = tp->next)
+ {
+ if (tp->type == fast_tracepoint || tp->type == static_tracepoint)
+ tp_prev = tp;
+ }
+
+ if (tp_prev)
+ {
+ CORE_ADDR tp_prev_target_next_addr;
+
+ /* Insert TPOINT after TP_PREV in IPA. */
+ if (read_inferior_data_pointer (tp_prev->obj_addr_on_target
+ + offsetof (struct tracepoint, next),
+ &tp_prev_target_next_addr))
+ fatal ("error reading `tp_prev->next'");
+
+ /* tpoint->next = tp_prev->next */
+ write_inferior_data_ptr (tpoint->obj_addr_on_target
+ + offsetof (struct tracepoint, next),
+ tp_prev_target_next_addr);
+ /* tp_prev->next = tpoint */
+ write_inferior_data_ptr (tp_prev->obj_addr_on_target
+ + offsetof (struct tracepoint, next),
+ tpoint->obj_addr_on_target);
+ }
+ else
+ /* First object in list, set the head pointer in the
+ inferior. */
+ write_inferior_data_ptr (ipa_sym_addrs.addr_tracepoints,
+ tpoint->obj_addr_on_target);
+
+}
+
+static void
+download_tracepoints (void)
+{
+ CORE_ADDR tpptr = 0, prev_tpptr = 0;
+ struct tracepoint *tpoint;
+
+ /* Start out empty. */
+ write_inferior_data_ptr (ipa_sym_addrs.addr_tracepoints, 0);
+
+ for (tpoint = tracepoints; tpoint; tpoint = tpoint->next)
+ {
+ if (tpoint->type != fast_tracepoint
+ && tpoint->type != static_tracepoint)
+ continue;
prev_tpptr = tpptr;
- tpptr = target_malloc (sizeof (*tpoint));
- tpoint->obj_addr_on_target = tpptr;
+
+ download_tracepoint_1 (tpoint);
+
+ tpptr = tpoint->obj_addr_on_target;
if (tpoint == tracepoints)
{
next),
tpptr);
}
-
- /* Write the whole object. We'll fix up its pointers in a bit.
- Assume no next for now. This is fixed up above on the next
- iteration, if there's any. */
- target_tracepoint.next = NULL;
- /* Need to clear this here too, since we're downloading the
- tracepoints before clearing our own copy. */
- target_tracepoint.hit_count = 0;
-
- write_inferior_memory (tpptr, (unsigned char *) &target_tracepoint,
- sizeof (target_tracepoint));
-
- if (tpoint->cond)
- write_inferior_data_ptr (tpptr + offsetof (struct tracepoint,
- cond),
- download_agent_expr (tpoint->cond));
-
- if (tpoint->numactions)
- {
- int i;
- CORE_ADDR actions_array;
-
- /* The pointers array. */
- actions_array
- = target_malloc (sizeof (*tpoint->actions) * tpoint->numactions);
- write_inferior_data_ptr (tpptr + offsetof (struct tracepoint,
- actions),
- actions_array);
-
- /* Now for each pointer, download the action. */
- for (i = 0; i < tpoint->numactions; i++)
- {
- CORE_ADDR ipa_action = 0;
- struct tracepoint_action *action = tpoint->actions[i];
-
- switch (action->type)
- {
- case 'M':
- ipa_action
- = target_malloc (sizeof (struct collect_memory_action));
- write_inferior_memory (ipa_action,
- (unsigned char *) action,
- sizeof (struct collect_memory_action));
- break;
- case 'R':
- ipa_action
- = target_malloc (sizeof (struct collect_registers_action));
- write_inferior_memory (ipa_action,
- (unsigned char *) action,
- sizeof (struct collect_registers_action));
- break;
- case 'X':
- {
- CORE_ADDR expr;
- struct eval_expr_action *eaction
- = (struct eval_expr_action *) action;
-
- ipa_action = target_malloc (sizeof (*eaction));
- write_inferior_memory (ipa_action,
- (unsigned char *) eaction,
- sizeof (*eaction));
-
- expr = download_agent_expr (eaction->expr);
- write_inferior_data_ptr
- (ipa_action + offsetof (struct eval_expr_action, expr),
- expr);
- break;
- }
- case 'L':
- ipa_action = target_malloc
- (sizeof (struct collect_static_trace_data_action));
- write_inferior_memory
- (ipa_action,
- (unsigned char *) action,
- sizeof (struct collect_static_trace_data_action));
- break;
- default:
- trace_debug ("unknown trace action '%c', ignoring",
- action->type);
- break;
- }
-
- if (ipa_action != 0)
- write_inferior_data_ptr
- (actions_array + i * sizeof (sizeof (*tpoint->actions)),
- ipa_action);
- }
- }
}
}
for (tpoint = tracepoints; tpoint; tpoint = tpoint->next)
{
- if (!tpoint->enabled || tpoint->type != static_tracepoint)
+ if (tpoint->type != static_tracepoint)
continue;
if (tpoint->address == (uintptr_t) mdata->location)
return;
}
+ if (!tpoint->enabled)
+ {
+ trace_debug ("gdb_probe: tracepoint disabled");
+ return;
+ }
+
ctx.tpoint = tpoint;
trace_debug ("gdb_probe: collecting marker: "
IP_AGENT_EXPORT char *gdb_tp_heap_buffer;
IP_AGENT_EXPORT char *gdb_jump_pad_buffer;
IP_AGENT_EXPORT char *gdb_jump_pad_buffer_end;
+IP_AGENT_EXPORT char *gdb_trampoline_buffer;
+IP_AGENT_EXPORT char *gdb_trampoline_buffer_end;
+IP_AGENT_EXPORT char *gdb_trampoline_buffer_error;
+
+/* Record the result of getting buffer space for fast tracepoint
+ trampolines. Any error message is copied, since caller may not be
+ using persistent storage. */
+
+void
+set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end, char *errmsg)
+{
+ gdb_trampoline_buffer = (char *) (uintptr_t) begin;
+ gdb_trampoline_buffer_end = (char *) (uintptr_t) end;
+ if (errmsg)
+ strncpy (gdb_trampoline_buffer_error, errmsg, 99);
+ else
+ strcpy (gdb_trampoline_buffer_error, "no buffer passed");
+}
static void __attribute__ ((constructor))
initialize_tracepoint_ftlib (void)
gdb_jump_pad_buffer, pagesize * 20, strerror (errno));
}
+ gdb_trampoline_buffer = gdb_trampoline_buffer_end = 0;
+
+ /* It's not a fatal error for something to go wrong with trampoline
+ buffer setup, but it can be mysterious, so create a channel to
+ report back on what went wrong, using a fixed size since we may
+ not be able to allocate space later when the problem occurs. */
+ gdb_trampoline_buffer_error = xmalloc (IPA_BUFSIZ);
+
+ strcpy (gdb_trampoline_buffer_error, "No errors reported");
+
initialize_low_tracepoint ();
#endif
}
projects / deliverable / binutils-gdb.git / blobdiff