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Diffstat (limited to 'kernel/trace/trace.c')
-rw-r--r--kernel/trace/trace.c159
1 files changed, 79 insertions, 80 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 426962b04183..ce11fa50a2f0 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -155,10 +155,11 @@ __setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops);
static int __init stop_trace_on_warning(char *str)
{
- __disable_trace_on_warning = 1;
+ if ((strcmp(str, "=0") != 0 && strcmp(str, "=off") != 0))
+ __disable_trace_on_warning = 1;
return 1;
}
-__setup("traceoff_on_warning=", stop_trace_on_warning);
+__setup("traceoff_on_warning", stop_trace_on_warning);
static int __init boot_alloc_snapshot(char *str)
{
@@ -2158,9 +2159,7 @@ __trace_array_vprintk(struct ring_buffer *buffer,
goto out;
}
- len = vsnprintf(tbuffer, TRACE_BUF_SIZE, fmt, args);
- if (len > TRACE_BUF_SIZE)
- goto out;
+ len = vscnprintf(tbuffer, TRACE_BUF_SIZE, fmt, args);
local_save_flags(flags);
size = sizeof(*entry) + len + 1;
@@ -2171,8 +2170,7 @@ __trace_array_vprintk(struct ring_buffer *buffer,
entry = ring_buffer_event_data(event);
entry->ip = ip;
- memcpy(&entry->buf, tbuffer, len);
- entry->buf[len] = '\0';
+ memcpy(&entry->buf, tbuffer, len + 1);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
ftrace_trace_stack(buffer, flags, 6, pc);
@@ -2509,14 +2507,14 @@ get_total_entries(struct trace_buffer *buf,
static void print_lat_help_header(struct seq_file *m)
{
- seq_puts(m, "# _------=> CPU# \n");
- seq_puts(m, "# / _-----=> irqs-off \n");
- seq_puts(m, "# | / _----=> need-resched \n");
- seq_puts(m, "# || / _---=> hardirq/softirq \n");
- seq_puts(m, "# ||| / _--=> preempt-depth \n");
- seq_puts(m, "# |||| / delay \n");
- seq_puts(m, "# cmd pid ||||| time | caller \n");
- seq_puts(m, "# \\ / ||||| \\ | / \n");
+ seq_puts(m, "# _------=> CPU# \n"
+ "# / _-----=> irqs-off \n"
+ "# | / _----=> need-resched \n"
+ "# || / _---=> hardirq/softirq \n"
+ "# ||| / _--=> preempt-depth \n"
+ "# |||| / delay \n"
+ "# cmd pid ||||| time | caller \n"
+ "# \\ / ||||| \\ | / \n");
}
static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
@@ -2533,20 +2531,20 @@ static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
static void print_func_help_header(struct trace_buffer *buf, struct seq_file *m)
{
print_event_info(buf, m);
- seq_puts(m, "# TASK-PID CPU# TIMESTAMP FUNCTION\n");
- seq_puts(m, "# | | | | |\n");
+ seq_puts(m, "# TASK-PID CPU# TIMESTAMP FUNCTION\n"
+ "# | | | | |\n");
}
static void print_func_help_header_irq(struct trace_buffer *buf, struct seq_file *m)
{
print_event_info(buf, m);
- seq_puts(m, "# _-----=> irqs-off\n");
- seq_puts(m, "# / _----=> need-resched\n");
- seq_puts(m, "# | / _---=> hardirq/softirq\n");
- seq_puts(m, "# || / _--=> preempt-depth\n");
- seq_puts(m, "# ||| / delay\n");
- seq_puts(m, "# TASK-PID CPU# |||| TIMESTAMP FUNCTION\n");
- seq_puts(m, "# | | | |||| | |\n");
+ seq_puts(m, "# _-----=> irqs-off\n"
+ "# / _----=> need-resched\n"
+ "# | / _---=> hardirq/softirq\n"
+ "# || / _--=> preempt-depth\n"
+ "# ||| / delay\n"
+ "# TASK-PID CPU# |||| TIMESTAMP FUNCTION\n"
+ "# | | | |||| | |\n");
}
void
@@ -2649,24 +2647,21 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
event = ftrace_find_event(entry->type);
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- if (iter->iter_flags & TRACE_FILE_LAT_FMT) {
- if (!trace_print_lat_context(iter))
- goto partial;
- } else {
- if (!trace_print_context(iter))
- goto partial;
- }
+ if (iter->iter_flags & TRACE_FILE_LAT_FMT)
+ trace_print_lat_context(iter);
+ else
+ trace_print_context(iter);
}
+ if (trace_seq_has_overflowed(s))
+ return TRACE_TYPE_PARTIAL_LINE;
+
if (event)
return event->funcs->trace(iter, sym_flags, event);
- if (!trace_seq_printf(s, "Unknown type %d\n", entry->type))
- goto partial;
+ trace_seq_printf(s, "Unknown type %d\n", entry->type);
- return TRACE_TYPE_HANDLED;
-partial:
- return TRACE_TYPE_PARTIAL_LINE;
+ return trace_handle_return(s);
}
static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
@@ -2677,22 +2672,20 @@ static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
entry = iter->ent;
- if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- if (!trace_seq_printf(s, "%d %d %llu ",
- entry->pid, iter->cpu, iter->ts))
- goto partial;
- }
+ if (trace_flags & TRACE_ITER_CONTEXT_INFO)
+ trace_seq_printf(s, "%d %d %llu ",
+ entry->pid, iter->cpu, iter->ts);
+
+ if (trace_seq_has_overflowed(s))
+ return TRACE_TYPE_PARTIAL_LINE;
event = ftrace_find_event(entry->type);
if (event)
return event->funcs->raw(iter, 0, event);
- if (!trace_seq_printf(s, "%d ?\n", entry->type))
- goto partial;
+ trace_seq_printf(s, "%d ?\n", entry->type);
- return TRACE_TYPE_HANDLED;
-partial:
- return TRACE_TYPE_PARTIAL_LINE;
+ return trace_handle_return(s);
}
static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
@@ -2705,9 +2698,11 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
entry = iter->ent;
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- SEQ_PUT_HEX_FIELD_RET(s, entry->pid);
- SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
- SEQ_PUT_HEX_FIELD_RET(s, iter->ts);
+ SEQ_PUT_HEX_FIELD(s, entry->pid);
+ SEQ_PUT_HEX_FIELD(s, iter->cpu);
+ SEQ_PUT_HEX_FIELD(s, iter->ts);
+ if (trace_seq_has_overflowed(s))
+ return TRACE_TYPE_PARTIAL_LINE;
}
event = ftrace_find_event(entry->type);
@@ -2717,9 +2712,9 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
return ret;
}
- SEQ_PUT_FIELD_RET(s, newline);
+ SEQ_PUT_FIELD(s, newline);
- return TRACE_TYPE_HANDLED;
+ return trace_handle_return(s);
}
static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
@@ -2731,9 +2726,11 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
entry = iter->ent;
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- SEQ_PUT_FIELD_RET(s, entry->pid);
- SEQ_PUT_FIELD_RET(s, iter->cpu);
- SEQ_PUT_FIELD_RET(s, iter->ts);
+ SEQ_PUT_FIELD(s, entry->pid);
+ SEQ_PUT_FIELD(s, iter->cpu);
+ SEQ_PUT_FIELD(s, iter->ts);
+ if (trace_seq_has_overflowed(s))
+ return TRACE_TYPE_PARTIAL_LINE;
}
event = ftrace_find_event(entry->type);
@@ -2779,10 +2776,12 @@ enum print_line_t print_trace_line(struct trace_iterator *iter)
{
enum print_line_t ret;
- if (iter->lost_events &&
- !trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n",
- iter->cpu, iter->lost_events))
- return TRACE_TYPE_PARTIAL_LINE;
+ if (iter->lost_events) {
+ trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n",
+ iter->cpu, iter->lost_events);
+ if (trace_seq_has_overflowed(&iter->seq))
+ return TRACE_TYPE_PARTIAL_LINE;
+ }
if (iter->trace && iter->trace->print_line) {
ret = iter->trace->print_line(iter);
@@ -2860,44 +2859,44 @@ static void test_ftrace_alive(struct seq_file *m)
{
if (!ftrace_is_dead())
return;
- seq_printf(m, "# WARNING: FUNCTION TRACING IS CORRUPTED\n");
- seq_printf(m, "# MAY BE MISSING FUNCTION EVENTS\n");
+ seq_puts(m, "# WARNING: FUNCTION TRACING IS CORRUPTED\n"
+ "# MAY BE MISSING FUNCTION EVENTS\n");
}
#ifdef CONFIG_TRACER_MAX_TRACE
static void show_snapshot_main_help(struct seq_file *m)
{
- seq_printf(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n");
- seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
- seq_printf(m, "# Takes a snapshot of the main buffer.\n");
- seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n");
- seq_printf(m, "# (Doesn't have to be '2' works with any number that\n");
- seq_printf(m, "# is not a '0' or '1')\n");
+ seq_puts(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n"
+ "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n"
+ "# Takes a snapshot of the main buffer.\n"
+ "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n"
+ "# (Doesn't have to be '2' works with any number that\n"
+ "# is not a '0' or '1')\n");
}
static void show_snapshot_percpu_help(struct seq_file *m)
{
- seq_printf(m, "# echo 0 > snapshot : Invalid for per_cpu snapshot file.\n");
+ seq_puts(m, "# echo 0 > snapshot : Invalid for per_cpu snapshot file.\n");
#ifdef CONFIG_RING_BUFFER_ALLOW_SWAP
- seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
- seq_printf(m, "# Takes a snapshot of the main buffer for this cpu.\n");
+ seq_puts(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n"
+ "# Takes a snapshot of the main buffer for this cpu.\n");
#else
- seq_printf(m, "# echo 1 > snapshot : Not supported with this kernel.\n");
- seq_printf(m, "# Must use main snapshot file to allocate.\n");
+ seq_puts(m, "# echo 1 > snapshot : Not supported with this kernel.\n"
+ "# Must use main snapshot file to allocate.\n");
#endif
- seq_printf(m, "# echo 2 > snapshot : Clears this cpu's snapshot buffer (but does not allocate)\n");
- seq_printf(m, "# (Doesn't have to be '2' works with any number that\n");
- seq_printf(m, "# is not a '0' or '1')\n");
+ seq_puts(m, "# echo 2 > snapshot : Clears this cpu's snapshot buffer (but does not allocate)\n"
+ "# (Doesn't have to be '2' works with any number that\n"
+ "# is not a '0' or '1')\n");
}
static void print_snapshot_help(struct seq_file *m, struct trace_iterator *iter)
{
if (iter->tr->allocated_snapshot)
- seq_printf(m, "#\n# * Snapshot is allocated *\n#\n");
+ seq_puts(m, "#\n# * Snapshot is allocated *\n#\n");
else
- seq_printf(m, "#\n# * Snapshot is freed *\n#\n");
+ seq_puts(m, "#\n# * Snapshot is freed *\n#\n");
- seq_printf(m, "# Snapshot commands:\n");
+ seq_puts(m, "# Snapshot commands:\n");
if (iter->cpu_file == RING_BUFFER_ALL_CPUS)
show_snapshot_main_help(m);
else
@@ -3251,7 +3250,7 @@ static int t_show(struct seq_file *m, void *v)
if (!t)
return 0;
- seq_printf(m, "%s", t->name);
+ seq_puts(m, t->name);
if (t->next)
seq_putc(m, ' ');
else
@@ -5749,10 +5748,10 @@ ftrace_snapshot_print(struct seq_file *m, unsigned long ip,
seq_printf(m, "%ps:", (void *)ip);
- seq_printf(m, "snapshot");
+ seq_puts(m, "snapshot");
if (count == -1)
- seq_printf(m, ":unlimited\n");
+ seq_puts(m, ":unlimited\n");
else
seq_printf(m, ":count=%ld\n", count);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 01:41:33 +0100