diff --git a/src/devtools/met-driver/4.19/common/cookie.c b/src/devtools/met-driver/4.19/common/cookie.c
new file mode 100644
index 0000000..e2c3f0c
--- /dev/null
+++ b/src/devtools/met-driver/4.19/common/cookie.c
@@ -0,0 +1,281 @@
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/cpu.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <asm/irq_regs.h>
+#include <asm/stacktrace.h>
+#include <linux/stacktrace.h>
+#include "interface.h"
+#include "met_drv.h"
+
+#define LINE_SIZE	256
+
+struct cookie_info {
+	int depth;
+	int strlen;
+	char strbuf[LINE_SIZE];
+};
+
+static unsigned int back_trace_depth;
+static DEFINE_PER_CPU(struct cookie_info, info);
+static DEFINE_PER_CPU(int, cpu_status);
+
+static int reset_driver_stat(void)
+{
+	back_trace_depth = 0;
+	met_cookie.mode = 0;
+	return 0;
+}
+
+
+noinline void cookie(char *strbuf)
+{
+	MET_TRACE("%s\n", strbuf);
+}
+
+noinline void cookie2(char *strbuf)
+{
+	MET_TRACE("%s\n", strbuf);
+}
+
+static void get_kernel_cookie(unsigned long pc, struct cookie_info *pinfo)
+{
+	int ret;
+#ifdef CONFIG_MODULES
+	off_t off;
+	struct module *mod = __module_address(pc);
+
+	if (mod) {
+		off = pc - (unsigned long)mod->core_layout.base;
+		ret = snprintf(pinfo->strbuf + pinfo->strlen, LINE_SIZE - pinfo->strlen,
+			       ",%s,%lx", mod->name, off);
+		pinfo->strlen += ret;
+		/* cookie(current->comm, pc, mod->name, off, 1); */
+	} else
+#endif
+	{
+		ret =
+		    snprintf(pinfo->strbuf + pinfo->strlen, LINE_SIZE - pinfo->strlen,
+			     ",vmlinux,%lx", pc);
+		pinfo->strlen += ret;
+		/* cookie(current->comm, pc, "vmlinux", pc, 0); */
+	}
+}
+
+#if defined(__arm__)
+static int report_trace(struct stackframe *frame, void *d)
+{
+	struct cookie_info *pinfo = d;
+	unsigned long pc = frame->pc;
+
+	if (pinfo->depth > 0) {
+		get_kernel_cookie(pc, pinfo);
+		pinfo->depth--;
+		return 0;
+	}
+	return 1;
+}
+#endif
+
+static void kernel_backtrace(struct pt_regs *const regs, struct cookie_info *pinfo)
+{
+#if defined(__arm__)
+	struct stackframe frame;
+
+	frame.fp = regs->ARM_fp;
+	frame.sp = regs->ARM_sp;
+	frame.lr = regs->ARM_lr;
+	frame.pc = regs->ARM_pc;
+	walk_stackframe(&frame, report_trace, pinfo);
+#else
+	return;
+#endif
+}
+
+
+void met_cookie_polling(unsigned long long stamp, int cpu)
+{
+	struct pt_regs *regs;
+	struct cookie_info *pinfo;
+	unsigned long pc;
+	int ret, outflag = 0;
+	off_t off;
+
+	if (per_cpu(cpu_status, cpu) != MET_CPU_ONLINE)
+		return;
+
+	regs = get_irq_regs();
+
+	if (regs == 0)
+		return;
+
+	pc = profile_pc(regs);
+
+	pinfo = &(per_cpu(info, cpu));
+	pinfo->strlen = snprintf(pinfo->strbuf, LINE_SIZE, "%s,%lx", current->comm, pc);
+
+	if (user_mode(regs)) {
+		struct mm_struct *mm;
+		struct vm_area_struct *vma;
+		struct path *ppath;
+
+		mm = current->mm;
+		for (vma = find_vma(mm, pc); vma; vma = vma->vm_next) {
+
+			if (pc < vma->vm_start || pc >= vma->vm_end)
+				continue;
+
+			if (vma->vm_file) {
+				ppath = &(vma->vm_file->f_path);
+
+				if (vma->vm_flags & VM_DENYWRITE)
+					off = pc;
+				else
+					off = (vma->vm_pgoff << PAGE_SHIFT) + pc - vma->vm_start;
+
+				ret =
+				    snprintf(pinfo->strbuf + pinfo->strlen,
+					     LINE_SIZE - pinfo->strlen, ",%s,%lx",
+					     (char *)(ppath->dentry->d_name.name), off);
+				pinfo->strlen += ret;
+				outflag = 1;
+			} else {
+				/* must be an anonymous map */
+				ret =
+				    snprintf(pinfo->strbuf + pinfo->strlen,
+					     LINE_SIZE - pinfo->strlen, ",nofile,%lx", pc);
+				pinfo->strlen += ret;
+				outflag = 1;
+			}
+			break;
+		}
+	} else {
+		/* kernel mode code */
+		if (back_trace_depth > 0) {
+			pinfo->depth = back_trace_depth + 1;
+			kernel_backtrace(regs, pinfo);
+		} else
+			get_kernel_cookie(pc, pinfo);
+		outflag = 1;
+	}
+
+	/* check task is resolvable */
+	if (outflag == 0)
+		return;
+
+	if (back_trace_depth == 0)
+		cookie(pinfo->strbuf);
+	else
+		cookie2(pinfo->strbuf);
+}
+
+
+static void met_cookie_start(void)
+{
+	int	cpu = raw_smp_processor_id();
+	per_cpu(cpu_status, cpu) = MET_CPU_ONLINE;
+	/* return; */
+}
+
+static void met_cookie_stop(void)
+{
+	/* return; */
+}
+
+
+static int met_cookie_process_argument(const char *arg, int len)
+{
+	unsigned int value;
+
+	if (met_parse_num(arg, &value, len) < 0) {
+		met_cookie.mode = 0;
+		return -EINVAL;
+	}
+
+	back_trace_depth = value;
+	met_cookie.mode = 1;
+
+	return 0;
+}
+
+static const char help[] =
+"  --cookie                              enable sampling task and PC\n"
+"  --cookie=N                            enable back trace (depth is N)\n";
+
+static int met_cookie_print_help(char *buf, int len)
+{
+	len = snprintf(buf, PAGE_SIZE, help);
+	return len;
+}
+
+
+static const char header[] =
+"# cookie: task_name,PC,cookie_name,offset\n"
+"met-info [000] 0.0: cookie_header: task_name,PC,cookie_name,offset\n";
+
+static const char header2_1[] = "# cookie2: task_name,PC,cookie,offset";
+static const char header2_2[] = "met-info [000] 0.0: cookie2_header: task_name,PC,cookie,offset";
+
+static int met_cookie_print_header(char *buf, int len)
+{
+	int i, ret;
+
+	if (back_trace_depth == 0) {
+		len = snprintf(buf, PAGE_SIZE, header);
+	} else {
+		len = snprintf(buf, PAGE_SIZE, header2_1);
+		for (i = 0; i < back_trace_depth; i++) {
+			ret = snprintf(buf + len, PAGE_SIZE, ",cookie%d,offset%d", i + 1, i + 1);
+			len += ret;
+		}
+		ret = snprintf(buf + len, PAGE_SIZE, "\n");
+		len += ret;
+
+		ret = snprintf(buf + len, PAGE_SIZE, header2_2);
+		len += ret;
+		for (i = 0; i < back_trace_depth; i++) {
+			ret = snprintf(buf + len, PAGE_SIZE, ",cookie%d,offset%d", i + 1, i + 1);
+			len += ret;
+		}
+		ret = snprintf(buf + len, PAGE_SIZE, "\n");
+		len += ret;
+	}
+
+	return len;
+}
+
+static void met_cookie_cpu_state_notify(long cpu, unsigned long action)
+{
+	per_cpu(cpu_status, cpu) = action;
+}
+
+struct metdevice met_cookie = {
+	.name = "cookie",
+	.type = MET_TYPE_PMU,
+	.cpu_related = 1,
+	.start = met_cookie_start,
+	.stop = met_cookie_stop,
+	.reset = reset_driver_stat,
+	.polling_interval = 1,
+	.timed_polling = met_cookie_polling,
+	.process_argument = met_cookie_process_argument,
+	.print_help = met_cookie_print_help,
+	.print_header = met_cookie_print_header,
+	.cpu_state_notify = met_cookie_cpu_state_notify,
+};