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tracing/probes: Move fetch function helpers to trace_probe.h 

Move fetch function helper macros/functions to the header file and
make them external.  This is preparation of supporting uprobe fetch
table in next patch.

Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim 2013-11-26 14:19:59 +09:00 committed by Steven Rostedt
parent 5bf652aaf4
commit b26c74e116
2 changed files with 78 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
kernel/trace/trace_probe.c
View File

@ -35,19 +35,15 @@ const char *reserved_field_names[] = {
FIELD_STRING_FUNC, FIELD_STRING_FUNC,
}; };
/* Printing function type */
#define PRINT_TYPE_FUNC_NAME(type) print_type_##type
#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
/* Printing in basic type function template */ /* Printing in basic type function template */
#define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt) \ #define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt) \
static __kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \ __kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \
const char *name, \ const char *name, \
void *data, void *ent) \ void *data, void *ent) \
{ \ { \
return trace_seq_printf(s, " %s=" fmt, name, *(type *)data); \ return trace_seq_printf(s, " %s=" fmt, name, *(type *)data); \
} \ } \
static const char PRINT_TYPE_FMT_NAME(type)[] = fmt; const char PRINT_TYPE_FMT_NAME(type)[] = fmt;
DEFINE_BASIC_PRINT_TYPE_FUNC(u8 , "0x%x") DEFINE_BASIC_PRINT_TYPE_FUNC(u8 , "0x%x")
DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "0x%x") DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "0x%x")
@ -58,23 +54,12 @@ DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d")
DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%d") DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%d")
DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%Ld") DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%Ld")
static inline void *get_rloc_data(u32 *dl)
{
return (u8 *)dl + get_rloc_offs(*dl);
}
/* For data_loc conversion */
static inline void *get_loc_data(u32 *dl, void *ent)
{
return (u8 *)ent + get_rloc_offs(*dl);
}
/* For defining macros, define string/string_size types */ /* For defining macros, define string/string_size types */
typedef u32 string; typedef u32 string;
typedef u32 string_size; typedef u32 string_size;
/* Print type function for string type */ /* Print type function for string type */
static __kprobes int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, __kprobes int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s,
const char *name, const char *name,
void *data, void *ent) void *data, void *ent)
{ {
@ -87,7 +72,7 @@ static __kprobes int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s,
(const char *)get_loc_data(data, ent)); (const char *)get_loc_data(data, ent));
} }
static const char PRINT_TYPE_FMT_NAME(string)[] = "\\\"%s\\\""; const char PRINT_TYPE_FMT_NAME(string)[] = "\\\"%s\\\"";
#define FETCH_FUNC_NAME(method, type) fetch_##method##_##type #define FETCH_FUNC_NAME(method, type) fetch_##method##_##type
/* /*
@ -111,7 +96,7 @@ DEFINE_FETCH_##method(u64)
/* Data fetch function templates */ /* Data fetch function templates */
#define DEFINE_FETCH_reg(type) \ #define DEFINE_FETCH_reg(type) \
static __kprobes void FETCH_FUNC_NAME(reg, type)(struct pt_regs *regs, \ __kprobes void FETCH_FUNC_NAME(reg, type)(struct pt_regs *regs, \
void *offset, void *dest) \ void *offset, void *dest) \
{ \ { \
*(type *)dest = (type)regs_get_register(regs, \ *(type *)dest = (type)regs_get_register(regs, \
@ -123,7 +108,7 @@ DEFINE_BASIC_FETCH_FUNCS(reg)
#define fetch_reg_string_size NULL #define fetch_reg_string_size NULL
#define DEFINE_FETCH_stack(type) \ #define DEFINE_FETCH_stack(type) \
static __kprobes void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs, \
void *offset, void *dest) \ void *offset, void *dest) \
{ \ { \
*(type *)dest = (type)regs_get_kernel_stack_nth(regs, \ *(type *)dest = (type)regs_get_kernel_stack_nth(regs, \
@ -135,7 +120,7 @@ DEFINE_BASIC_FETCH_FUNCS(stack)
#define fetch_stack_string_size NULL #define fetch_stack_string_size NULL
#define DEFINE_FETCH_retval(type) \ #define DEFINE_FETCH_retval(type) \
static __kprobes void FETCH_FUNC_NAME(retval, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(retval, type)(struct pt_regs *regs, \
void *dummy, void *dest) \ void *dummy, void *dest) \
{ \ { \
*(type *)dest = (type)regs_return_value(regs); \ *(type *)dest = (type)regs_return_value(regs); \
@ -146,7 +131,7 @@ DEFINE_BASIC_FETCH_FUNCS(retval)
#define fetch_retval_string_size NULL #define fetch_retval_string_size NULL
#define DEFINE_FETCH_memory(type) \ #define DEFINE_FETCH_memory(type) \
static __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs, \
void *addr, void *dest) \ void *addr, void *dest) \
{ \ { \
type retval; \ type retval; \
@ -160,7 +145,7 @@ DEFINE_BASIC_FETCH_FUNCS(memory)
* Fetch a null-terminated string. Caller MUST set *(u32 *)dest with max * Fetch a null-terminated string. Caller MUST set *(u32 *)dest with max
* length and relative data location. * length and relative data location.
*/ */
static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs,
void *addr, void *dest) void *addr, void *dest)
{ {
long ret; long ret;
@ -197,7 +182,7 @@ static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs,
} }
/* Return the length of string -- including null terminal byte */ /* Return the length of string -- including null terminal byte */
static __kprobes void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, __kprobes void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs,
void *addr, void *dest) void *addr, void *dest)
{ {
mm_segment_t old_fs; mm_segment_t old_fs;
@ -268,7 +253,7 @@ static struct symbol_cache *alloc_symbol_cache(const char *sym, long offset)
} }
#define DEFINE_FETCH_symbol(type) \ #define DEFINE_FETCH_symbol(type) \
static __kprobes void FETCH_FUNC_NAME(symbol, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(symbol, type)(struct pt_regs *regs, \
void *data, void *dest) \ void *data, void *dest) \
{ \ { \
struct symbol_cache *sc = data; \ struct symbol_cache *sc = data; \
@ -288,7 +273,7 @@ struct deref_fetch_param {
}; };
#define DEFINE_FETCH_deref(type) \ #define DEFINE_FETCH_deref(type) \
static __kprobes void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs, \
void *data, void *dest) \ void *data, void *dest) \
{ \ { \
struct deref_fetch_param *dprm = data; \ struct deref_fetch_param *dprm = data; \
@ -329,7 +314,7 @@ struct bitfield_fetch_param {
}; };
#define DEFINE_FETCH_bitfield(type) \ #define DEFINE_FETCH_bitfield(type) \
static __kprobes void FETCH_FUNC_NAME(bitfield, type)(struct pt_regs *regs,\ __kprobes void FETCH_FUNC_NAME(bitfield, type)(struct pt_regs *regs, \
void *data, void *dest) \ void *data, void *dest) \
{ \ { \
struct bitfield_fetch_param *bprm = data; \ struct bitfield_fetch_param *bprm = data; \
@ -374,39 +359,6 @@ free_bitfield_fetch_param(struct bitfield_fetch_param *data)
kfree(data); kfree(data);
} }
/* Default (unsigned long) fetch type */
#define __DEFAULT_FETCH_TYPE(t) u##t
#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)
#define ASSIGN_FETCH_FUNC(method, type) \
[FETCH_MTD_##method] = FETCH_FUNC_NAME(method, type)
#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
{.name = _name, \
.size = _size, \
.is_signed = sign, \
.print = PRINT_TYPE_FUNC_NAME(ptype), \
.fmt = PRINT_TYPE_FMT_NAME(ptype), \
.fmttype = _fmttype, \
.fetch = { \
ASSIGN_FETCH_FUNC(reg, ftype), \
ASSIGN_FETCH_FUNC(stack, ftype), \
ASSIGN_FETCH_FUNC(retval, ftype), \
ASSIGN_FETCH_FUNC(memory, ftype), \
ASSIGN_FETCH_FUNC(symbol, ftype), \
ASSIGN_FETCH_FUNC(deref, ftype), \
ASSIGN_FETCH_FUNC(bitfield, ftype), \
} \
}
#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \
__ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, #ptype)
#define FETCH_TYPE_STRING 0
#define FETCH_TYPE_STRSIZE 1
/* Fetch type information table */ /* Fetch type information table */
static const struct fetch_type fetch_type_table[] = { static const struct fetch_type fetch_type_table[] = {
/* Special types */ /* Special types */

65
kernel/trace/trace_probe.h
View File

@ -81,6 +81,17 @@
*/ */
#define convert_rloc_to_loc(dl, offs) ((u32)(dl) + (offs)) #define convert_rloc_to_loc(dl, offs) ((u32)(dl) + (offs))
static inline void *get_rloc_data(u32 *dl)
{
return (u8 *)dl + get_rloc_offs(*dl);
}
/* For data_loc conversion */
static inline void *get_loc_data(u32 *dl, void *ent)
{
return (u8 *)ent + get_rloc_offs(*dl);
}
/* Data fetch function type */ /* Data fetch function type */
typedef void (*fetch_func_t)(struct pt_regs *, void *, void *); typedef void (*fetch_func_t)(struct pt_regs *, void *, void *);
/* Printing function type */ /* Printing function type */
@ -115,6 +126,60 @@ struct fetch_param {
void *data; void *data;
}; };
#define PRINT_TYPE_FUNC_NAME(type) print_type_##type
#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
/* Printing in basic type function template */
#define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \
__kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \
const char *name, \
void *data, void *ent); \
extern const char PRINT_TYPE_FMT_NAME(type)[]
DECLARE_BASIC_PRINT_TYPE_FUNC(u8);
DECLARE_BASIC_PRINT_TYPE_FUNC(u16);
DECLARE_BASIC_PRINT_TYPE_FUNC(u32);
DECLARE_BASIC_PRINT_TYPE_FUNC(u64);
DECLARE_BASIC_PRINT_TYPE_FUNC(s8);
DECLARE_BASIC_PRINT_TYPE_FUNC(s16);
DECLARE_BASIC_PRINT_TYPE_FUNC(s32);
DECLARE_BASIC_PRINT_TYPE_FUNC(s64);
DECLARE_BASIC_PRINT_TYPE_FUNC(string);
/* Default (unsigned long) fetch type */
#define __DEFAULT_FETCH_TYPE(t) u##t
#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)
#define ASSIGN_FETCH_FUNC(method, type) \
[FETCH_MTD_##method] = FETCH_FUNC_NAME(method, type)
#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
{.name = _name, \
.size = _size, \
.is_signed = sign, \
.print = PRINT_TYPE_FUNC_NAME(ptype), \
.fmt = PRINT_TYPE_FMT_NAME(ptype), \
.fmttype = _fmttype, \
.fetch = { \
ASSIGN_FETCH_FUNC(reg, ftype), \
ASSIGN_FETCH_FUNC(stack, ftype), \
ASSIGN_FETCH_FUNC(retval, ftype), \
ASSIGN_FETCH_FUNC(memory, ftype), \
ASSIGN_FETCH_FUNC(symbol, ftype), \
ASSIGN_FETCH_FUNC(deref, ftype), \
ASSIGN_FETCH_FUNC(bitfield, ftype), \
} \
}
#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \
__ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, #ptype)
#define FETCH_TYPE_STRING 0
#define FETCH_TYPE_STRSIZE 1
struct probe_arg { struct probe_arg {
struct fetch_param fetch; struct fetch_param fetch;
struct fetch_param fetch_size; struct fetch_param fetch_size;