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Merge branch 'perf/core' into perf/probes

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Conflicts:
	tools/perf/Makefile

Merge reason:

 - fix the conflict
 - pick up the pr_*() infrastructure to queue up dependent patch

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2009-10-23 08:23:20 +02:00
parent 9bf4e7fba8 6beba7adbe
commit 4331595650
98 changed files with 4483 additions and 3536 deletions
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106
kernel/trace/trace_syscalls.c
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@@ -14,6 +14,69 @@ static int sys_refcount_exit;
static DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
static DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
extern unsigned long __start_syscalls_metadata[];
extern unsigned long __stop_syscalls_metadata[];
static struct syscall_metadata **syscalls_metadata;
static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
{
struct syscall_metadata *start;
struct syscall_metadata *stop;
char str[KSYM_SYMBOL_LEN];
start = (struct syscall_metadata *)__start_syscalls_metadata;
stop = (struct syscall_metadata *)__stop_syscalls_metadata;
kallsyms_lookup(syscall, NULL, NULL, NULL, str);
for ( ; start < stop; start++) {
/*
* Only compare after the "sys" prefix. Archs that use
* syscall wrappers may have syscalls symbols aliases prefixed
* with "SyS" instead of "sys", leading to an unwanted
* mismatch.
*/
if (start->name && !strcmp(start->name + 3, str + 3))
return start;
}
return NULL;
}
static struct syscall_metadata *syscall_nr_to_meta(int nr)
{
if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
return NULL;
return syscalls_metadata[nr];
}
int syscall_name_to_nr(char *name)
{
int i;
if (!syscalls_metadata)
return -1;
for (i = 0; i < NR_syscalls; i++) {
if (syscalls_metadata[i]) {
if (!strcmp(syscalls_metadata[i]->name, name))
return i;
}
}
return -1;
}
void set_syscall_enter_id(int num, int id)
{
syscalls_metadata[num]->enter_id = id;
}
void set_syscall_exit_id(int num, int id)
{
syscalls_metadata[num]->exit_id = id;
}
enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags)
{
@@ -103,7 +166,8 @@ 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)
#type, #name, offsetof(typeof(trace), name), \
sizeof(trace.name), is_signed_type(type)
int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
@@ -120,7 +184,8 @@ int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
if (!entry)
return 0;
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr));
if (!ret)
return 0;
@@ -130,8 +195,10 @@ int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
entry->args[i]);
if (!ret)
return 0;
ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;\n", offset,
sizeof(unsigned long));
ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;"
"\tsigned:%u;\n", offset,
sizeof(unsigned long),
is_signed_type(unsigned long));
if (!ret)
return 0;
offset += sizeof(unsigned long);
@@ -163,8 +230,10 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
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",
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr),
SYSCALL_FIELD(long, ret));
if (!ret)
@@ -212,7 +281,7 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
if (ret)
return ret;
ret = trace_define_field(call, SYSCALL_FIELD(long, ret), 0,
ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
FILTER_OTHER);
return ret;
@@ -375,6 +444,29 @@ struct trace_event event_syscall_exit = {
.trace = print_syscall_exit,
};
int __init init_ftrace_syscalls(void)
{
struct syscall_metadata *meta;
unsigned long addr;
int i;
syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
NR_syscalls, GFP_KERNEL);
if (!syscalls_metadata) {
WARN_ON(1);
return -ENOMEM;
}
for (i = 0; i < NR_syscalls; i++) {
addr = arch_syscall_addr(i);
meta = find_syscall_meta(addr);
syscalls_metadata[i] = meta;
}
return 0;
}
core_initcall(init_ftrace_syscalls);
#ifdef CONFIG_EVENT_PROFILE
static DECLARE_BITMAP(enabled_prof_enter_syscalls, NR_syscalls);