#include <trace/syscall.h>
+#include <trace/events/syscalls.h>
#include <linux/kernel.h>
#include <linux/ftrace.h>
#include <linux/perf_counter.h>
static DECLARE_BITMAP(enabled_enter_syscalls, FTRACE_SYSCALL_MAX);
static DECLARE_BITMAP(enabled_exit_syscalls, FTRACE_SYSCALL_MAX);
-/* Option to display the parameters types */
-enum {
- TRACE_SYSCALLS_OPT_TYPES = 0x1,
-};
-
-static struct tracer_opt syscalls_opts[] = {
- { TRACER_OPT(syscall_arg_type, TRACE_SYSCALLS_OPT_TYPES) },
- { }
-};
-
-static struct tracer_flags syscalls_flags = {
- .val = 0, /* By default: no parameters types */
- .opts = syscalls_opts
-};
-
enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags)
{
for (i = 0; i < entry->nb_args; i++) {
/* parameter types */
- if (syscalls_flags.val & TRACE_SYSCALLS_OPT_TYPES) {
+ if (trace_flags & TRACE_ITER_VERBOSE) {
ret = trace_seq_printf(s, "%s ", entry->types[i]);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
}
/* parameter values */
- ret = trace_seq_printf(s, "%s: %lx%s ", entry->args[i],
+ ret = trace_seq_printf(s, "%s: %lx%s", entry->args[i],
trace->args[i],
- i == entry->nb_args - 1 ? ")" : ",");
+ i == entry->nb_args - 1 ? "" : ", ");
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
}
+ ret = trace_seq_putc(s, ')');
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+
end:
- trace_seq_printf(s, "\n");
+ ret = trace_seq_putc(s, '\n');
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+
return TRACE_TYPE_HANDLED;
}
return TRACE_TYPE_HANDLED;
}
-int ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s)
+extern char *__bad_type_size(void);
+
+#define SYSCALL_FIELD(type, name) \
+ sizeof(type) != sizeof(trace.name) ? \
+ __bad_type_size() : \
+ #type, #name, offsetof(typeof(trace), name), sizeof(trace.name)
+
+int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
int i;
int nr;
- int ret = 0;
+ int ret;
struct syscall_metadata *entry;
- int offset = sizeof(struct trace_entry);
+ struct syscall_trace_enter trace;
+ int offset = offsetof(struct syscall_trace_enter, args);
- nr = syscall_name_to_nr((char *)call->data);
+ nr = syscall_name_to_nr(call->data);
entry = syscall_nr_to_meta(nr);
if (!entry)
- return ret;
+ return 0;
+
+ ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
+ SYSCALL_FIELD(int, nr));
+ if (!ret)
+ return 0;
for (i = 0; i < entry->nb_args; i++) {
ret = trace_seq_printf(s, "\tfield:%s %s;", entry->types[i],
entry->args[i]);
if (!ret)
return 0;
- ret = trace_seq_printf(s, "\toffset:%d;\tsize:%lu;\n", offset,
+ ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;\n", offset,
sizeof(unsigned long));
if (!ret)
return 0;
offset += sizeof(unsigned long);
}
- trace_seq_printf(s, "\nprint fmt: \"");
+ trace_seq_puts(s, "\nprint fmt: \"");
for (i = 0; i < entry->nb_args; i++) {
- ret = trace_seq_printf(s, "%s: 0x%%0%lulx%s", entry->args[i],
+ ret = trace_seq_printf(s, "%s: 0x%%0%zulx%s", entry->args[i],
sizeof(unsigned long),
- i == entry->nb_args - 1 ? "\", " : ", ");
+ i == entry->nb_args - 1 ? "" : ", ");
if (!ret)
return 0;
}
+ trace_seq_putc(s, '"');
for (i = 0; i < entry->nb_args; i++) {
- ret = trace_seq_printf(s, "((unsigned long)(REC->%s))%s",
- entry->args[i],
- i == entry->nb_args - 1 ? "\n" : ", ");
+ ret = trace_seq_printf(s, ", ((unsigned long)(REC->%s))",
+ entry->args[i]);
if (!ret)
return 0;
}
+ return trace_seq_putc(s, '\n');
+}
+
+int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
+{
+ int ret;
+ struct syscall_trace_exit trace;
+
+ ret = trace_seq_printf(s,
+ "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
+ "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
+ SYSCALL_FIELD(int, nr),
+ SYSCALL_FIELD(unsigned long, ret));
+ if (!ret)
+ return 0;
+
+ return trace_seq_printf(s, "\nprint fmt: \"0x%%lx\", REC->ret\n");
+}
+
+int syscall_enter_define_fields(struct ftrace_event_call *call)
+{
+ struct syscall_trace_enter trace;
+ struct syscall_metadata *meta;
+ int ret;
+ int nr;
+ int i;
+ int offset = offsetof(typeof(trace), args);
+
+ nr = syscall_name_to_nr(call->data);
+ meta = syscall_nr_to_meta(nr);
+
+ if (!meta)
+ return 0;
+
+ ret = trace_define_common_fields(call);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < meta->nb_args; i++) {
+ ret = trace_define_field(call, (char *)meta->types[i],
+ (char *)meta->args[i], offset,
+ sizeof(unsigned long), 0,
+ FILTER_OTHER);
+ offset += sizeof(unsigned long);
+ }
+
+ return ret;
+}
+
+int syscall_exit_define_fields(struct ftrace_event_call *call)
+{
+ struct syscall_trace_exit trace;
+ int ret;
+
+ ret = trace_define_common_fields(call);
+ if (ret)
+ return ret;
+
+ ret = trace_define_field(call, SYSCALL_FIELD(unsigned long, ret), 0,
+ FILTER_OTHER);
+
return ret;
}
entry->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args, entry->args);
- trace_current_buffer_unlock_commit(event, 0, 0);
- trace_wake_up();
+ if (!filter_current_check_discard(sys_data->enter_event, entry, event))
+ trace_current_buffer_unlock_commit(event, 0, 0);
}
void ftrace_syscall_exit(struct pt_regs *regs, long ret)
entry->nr = syscall_nr;
entry->ret = syscall_get_return_value(current, regs);
- trace_current_buffer_unlock_commit(event, 0, 0);
- trace_wake_up();
+ if (!filter_current_check_discard(sys_data->exit_event, entry, event))
+ trace_current_buffer_unlock_commit(event, 0, 0);
}
-int reg_event_syscall_enter(void *ptr)
+int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
int num;
char *name;
- name = (char *)ptr;
+ name = (char *)call->data;
num = syscall_name_to_nr(name);
if (num < 0 || num >= FTRACE_SYSCALL_MAX)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_enter)
- ret = register_trace_syscall_enter(ftrace_syscall_enter);
+ ret = register_trace_sys_enter(ftrace_syscall_enter);
if (ret) {
pr_info("event trace: Could not activate"
"syscall entry trace point");
return ret;
}
-void unreg_event_syscall_enter(void *ptr)
+void unreg_event_syscall_enter(struct ftrace_event_call *call)
{
int num;
char *name;
- name = (char *)ptr;
+ name = (char *)call->data;
num = syscall_name_to_nr(name);
if (num < 0 || num >= FTRACE_SYSCALL_MAX)
return;
sys_refcount_enter--;
clear_bit(num, enabled_enter_syscalls);
if (!sys_refcount_enter)
- unregister_trace_syscall_enter(ftrace_syscall_enter);
+ unregister_trace_sys_enter(ftrace_syscall_enter);
mutex_unlock(&syscall_trace_lock);
}
-int reg_event_syscall_exit(void *ptr)
+int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
int num;
char *name;
- name = (char *)ptr;
+ name = (char *)call->data;
num = syscall_name_to_nr(name);
if (num < 0 || num >= FTRACE_SYSCALL_MAX)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_exit)
- ret = register_trace_syscall_exit(ftrace_syscall_exit);
+ ret = register_trace_sys_exit(ftrace_syscall_exit);
if (ret) {
pr_info("event trace: Could not activate"
"syscall exit trace point");
return ret;
}
-void unreg_event_syscall_exit(void *ptr)
+void unreg_event_syscall_exit(struct ftrace_event_call *call)
{
int num;
char *name;
- name = (char *)ptr;
+ name = (char *)call->data;
num = syscall_name_to_nr(name);
if (num < 0 || num >= FTRACE_SYSCALL_MAX)
return;
sys_refcount_exit--;
clear_bit(num, enabled_exit_syscalls);
if (!sys_refcount_exit)
- unregister_trace_syscall_exit(ftrace_syscall_exit);
+ unregister_trace_sys_exit(ftrace_syscall_exit);
mutex_unlock(&syscall_trace_lock);
}
#ifdef CONFIG_EVENT_PROFILE
-struct syscall_enter_record {
- struct trace_entry entry;
- unsigned long args[0];
-};
-
-struct syscall_exit_record {
- struct trace_entry entry;
- unsigned long ret;
-};
-
static DECLARE_BITMAP(enabled_prof_enter_syscalls, FTRACE_SYSCALL_MAX);
static DECLARE_BITMAP(enabled_prof_exit_syscalls, FTRACE_SYSCALL_MAX);
static int sys_prof_refcount_enter;
static void prof_syscall_enter(struct pt_regs *regs, long id)
{
- struct syscall_enter_record *rec;
+ struct syscall_trace_enter *rec;
struct syscall_metadata *sys_data;
int syscall_nr;
int size;
/* zero the dead bytes from align to not leak stack to user */
*(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
- rec = (struct syscall_enter_record *) raw_data;
- tracing_generic_entry_update(&rec->entry, 0, 0);
- rec->entry.type = sys_data->enter_id;
+ rec = (struct syscall_trace_enter *) raw_data;
+ tracing_generic_entry_update(&rec->ent, 0, 0);
+ rec->ent.type = sys_data->enter_id;
+ rec->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args,
(unsigned long *)&rec->args);
perf_tpcounter_event(sys_data->enter_id, 0, 1, rec, size);
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_enter)
- ret = register_trace_syscall_enter(prof_syscall_enter);
+ ret = register_trace_sys_enter(prof_syscall_enter);
if (ret) {
pr_info("event trace: Could not activate"
"syscall entry trace point");
sys_prof_refcount_enter--;
clear_bit(num, enabled_prof_enter_syscalls);
if (!sys_prof_refcount_enter)
- unregister_trace_syscall_enter(prof_syscall_enter);
+ unregister_trace_sys_enter(prof_syscall_enter);
mutex_unlock(&syscall_trace_lock);
}
static void prof_syscall_exit(struct pt_regs *regs, long ret)
{
struct syscall_metadata *sys_data;
- struct syscall_exit_record rec;
+ struct syscall_trace_exit rec;
int syscall_nr;
syscall_nr = syscall_get_nr(current, regs);
if (!sys_data)
return;
- tracing_generic_entry_update(&rec.entry, 0, 0);
- rec.entry.type = sys_data->exit_id;
+ tracing_generic_entry_update(&rec.ent, 0, 0);
+ rec.ent.type = sys_data->exit_id;
+ rec.nr = syscall_nr;
rec.ret = syscall_get_return_value(current, regs);
perf_tpcounter_event(sys_data->exit_id, 0, 1, &rec, sizeof(rec));
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_exit)
- ret = register_trace_syscall_exit(prof_syscall_exit);
+ ret = register_trace_sys_exit(prof_syscall_exit);
if (ret) {
pr_info("event trace: Could not activate"
"syscall entry trace point");
sys_prof_refcount_exit--;
clear_bit(num, enabled_prof_exit_syscalls);
if (!sys_prof_refcount_exit)
- unregister_trace_syscall_exit(prof_syscall_exit);
+ unregister_trace_sys_exit(prof_syscall_exit);
mutex_unlock(&syscall_trace_lock);
}
git.openpandora.org / pandora-kernel.git / blobdiff