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from __future__ import print_function
from bcc import BPF
import argparse
import ctypes as ct
import sys,time
import subprocess
bpf_text = """
#include <uapi/linux/ptrace.h>
/**************************mysql struct def start*****************************/
enum enum_server_command
{
COM_SLEEP,
COM_QUIT,
COM_INIT_DB,
COM_QUERY,
COM_FIELD_LIST,
COM_CREATE_DB,
COM_DROP_DB,
COM_REFRESH,
COM_SHUTDOWN,
COM_STATISTICS,
COM_PROCESS_INFO,
COM_CONNECT,
COM_PROCESS_KILL,
COM_DEBUG,
COM_PING,
COM_TIME,
COM_DELAYED_INSERT,
COM_CHANGE_USER,
COM_BINLOG_DUMP,
COM_TABLE_DUMP,
COM_CONNECT_OUT,
COM_REGISTER_SLAVE,
COM_STMT_PREPARE,
COM_STMT_EXECUTE,
COM_STMT_SEND_LONG_DATA,
COM_STMT_CLOSE,
COM_STMT_RESET,
COM_SET_OPTION,
COM_STMT_FETCH,
COM_DAEMON,
COM_BINLOG_DUMP_GTID,
COM_RESET_CONNECTION,
/* don't forget to update const char *command_name[] in sql_parse.cc */
/* Must be last */
COM_END
};
typedef struct st_com_init_db_data
{
const char *db_name;
unsigned long length;
} COM_INIT_DB_DATA;
#define MYSQL_SHUTDOWN_KILLABLE_CONNECT (unsigned char)(1 << 0)
#define MYSQL_SHUTDOWN_KILLABLE_TRANS (unsigned char)(1 << 1)
#define MYSQL_SHUTDOWN_KILLABLE_LOCK_TABLE (unsigned char)(1 << 2)
#define MYSQL_SHUTDOWN_KILLABLE_UPDATE (unsigned char)(1 << 3)
#define LOCK_MODE_MASK 0xFUL
#define LOCK_TYPE_MASK 0xF0UL
enum mysql_enum_shutdown_level {
SHUTDOWN_DEFAULT = 0,
SHUTDOWN_WAIT_CONNECTIONS= MYSQL_SHUTDOWN_KILLABLE_CONNECT,
SHUTDOWN_WAIT_TRANSACTIONS= MYSQL_SHUTDOWN_KILLABLE_TRANS,
SHUTDOWN_WAIT_UPDATES= MYSQL_SHUTDOWN_KILLABLE_UPDATE,
SHUTDOWN_WAIT_ALL_BUFFERS= (MYSQL_SHUTDOWN_KILLABLE_UPDATE << 1),
SHUTDOWN_WAIT_CRITICAL_BUFFERS= (MYSQL_SHUTDOWN_KILLABLE_UPDATE << 1) + 1,
KILL_QUERY= 254,
KILL_CONNECTION= 255
};
typedef struct st_com_refresh_data
{
unsigned char options;
} COM_REFRESH_DATA;
typedef struct st_com_shutdown_data
{
enum mysql_enum_shutdown_level level;
} COM_SHUTDOWN_DATA;
typedef struct st_com_kill_data
{
unsigned long id;
} COM_KILL_DATA;
typedef struct st_com_set_option_data
{
unsigned int opt_command;
} COM_SET_OPTION_DATA;
typedef struct st_com_stmt_execute_data
{
unsigned long stmt_id;
unsigned long flags;
unsigned char *params;
unsigned long params_length;
} COM_STMT_EXECUTE_DATA;
typedef struct st_com_stmt_fetch_data
{
unsigned long stmt_id;
unsigned long num_rows;
} COM_STMT_FETCH_DATA;
typedef struct st_com_stmt_send_long_data_data
{
unsigned long stmt_id;
unsigned int param_number;
unsigned char *longdata;
unsigned long length;
} COM_STMT_SEND_LONG_DATA_DATA;
typedef struct st_com_stmt_prepare_data
{
const char *query;
unsigned int length;
} COM_STMT_PREPARE_DATA;
typedef struct st_stmt_close_data
{
unsigned int stmt_id;
} COM_STMT_CLOSE_DATA;
typedef struct st_com_stmt_reset_data
{
unsigned int stmt_id;
} COM_STMT_RESET_DATA;
typedef struct st_com_query_data
{
const char *query;
unsigned int length;
} COM_QUERY_DATA;
typedef struct st_com_field_list_data
{
unsigned char *table_name;
unsigned int table_name_length;
const unsigned char *query;
unsigned int query_length;
} COM_FIELD_LIST_DATA;
union COM_DATA {
COM_INIT_DB_DATA com_init_db;
COM_REFRESH_DATA com_refresh;
COM_SHUTDOWN_DATA com_shutdown;
COM_KILL_DATA com_kill;
COM_SET_OPTION_DATA com_set_option;
COM_STMT_EXECUTE_DATA com_stmt_execute;
COM_STMT_FETCH_DATA com_stmt_fetch;
COM_STMT_SEND_LONG_DATA_DATA com_stmt_send_long_data;
COM_STMT_PREPARE_DATA com_stmt_prepare;
COM_STMT_CLOSE_DATA com_stmt_close;
COM_STMT_RESET_DATA com_stmt_reset;
COM_QUERY_DATA com_query;
COM_FIELD_LIST_DATA com_field_list;
};
struct String {
char *m_ptr;
size_t m_length;
void *m_charset;
u32 m_alloced_length;
bool m_is_alloced;
};
/**************************mysql struct def end*****************************/
typedef struct perf_event{
u32 tid;
u32 size;
u64 ts;
char user[16];
char ip[16];
char host[24];
char sql[256];
}COM_PERF_EVENT;
BPF_HASH(tid_dispatch_map, u32, COM_PERF_EVENT);
BPF_PERF_OUTPUT(events);
static inline void* GET_SC_CTX_PTR_FROM_THD_PTR(void* thd) {return *(void**)(thd + 0x1198);}
static inline void* GET_USER_PTR_FROM_SC_CTX_PTR(void* thd) {return thd + 0xa0;}
static inline void* GET_HOST_PTR_FROM_SC_CTX_PTR(void* thd) {return thd + 0x20;}
static inline void* GET_IP_PTR_FROM_SC_CTX_PTR(void* thd) {return thd + 0x40;}
int dispatch_command_entry(struct pt_regs *ctx) {
enum enum_server_command command_id = PT_REGS_PARM3(ctx);
if (command_id != COM_QUERY) return 0;
COM_PERF_EVENT event = {};
event.tid = bpf_get_current_pid_tgid();
union COM_DATA *com_data = (union COM_DATA *)PT_REGS_PARM2(ctx);
event.size = com_data->com_query.length;
bpf_probe_read_str(&event.sql, sizeof(event.sql), com_data->com_query.query);
void *thd = (void*) PT_REGS_PARM1(ctx);
void *sc_ctx = GET_SC_CTX_PTR_FROM_THD_PTR(thd);
//user
char *user = GET_USER_PTR_FROM_SC_CTX_PTR(sc_ctx);
bpf_probe_read_str(&event.user, sizeof(event.user), user);
//host
struct String *host = (struct String *)GET_HOST_PTR_FROM_SC_CTX_PTR(sc_ctx);
bpf_probe_read_str(&event.host, sizeof(event.host), host->m_ptr);
//ip
struct String *ip = (struct String *)GET_IP_PTR_FROM_SC_CTX_PTR(sc_ctx);
bpf_probe_read_str(&event.ip, sizeof(event.ip), ip->m_ptr);
event.ts = bpf_ktime_get_ns();
//record dispatch
tid_dispatch_map.insert(&event.tid,&event);
return 0;
}
int dispatch_command_return(struct pt_regs *ctx) {
u32 thread_id = bpf_get_current_pid_tgid();
COM_PERF_EVENT *event = tid_dispatch_map.lookup(&thread_id);
if (!event) return 0;
event->ts = bpf_ktime_get_ns() - event->ts;
events.perf_submit(ctx, event, sizeof(*event));
tid_dispatch_map.delete(&thread_id);
return 0;
}
"""
b = BPF(text=bpf_text)
b.attach_uprobe(name="/home/mysqld", sym="_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command",fn_name='dispatch_command_entry')
b.attach_uretprobe(name="/home/mysqld", sym="_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command",fn_name='dispatch_command_return')
def print_event(cpu, data, size):
event = b["events"].event(data)
print("%s %s %s %s %s %s %s" % (event.tid, event.ts, event.user, event.host, event.ip, event.sql, event.size))
b["events"].open_perf_buffer(print_event)
print("thread_id time(ns) user host ip sql sql_size")
while 1:
try:
b.perf_buffer_poll()
except KeyboardInterrupt:
exit()
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