ignore unsolvable symbol if current callchain has no solvable symbol yet.

Signed-off-by: David Wang <00107082@163.com>

add option to profile kernel callchains only.

Signed-off-by: David Wang <00107082@163.com>

fix null pointer issue

Signed-off-by: David Wang <00107082@163.com>

fix html tag in symbol name

Signed-off-by: David Wang <00107082@163.com>

when an address has not match, give it a range

Signed-off-by: David Wang <00107082@163.com>

when a address could not be symbolized, use nearest symbole with higher address.

Signed-off-by: David Wang <00107082@163.com>

adjust profiler code, but the callchain from kernel is still not stable.

Signed-off-by: David Wang <00107082@163.com>

Add new example for profiler kprobe

Signed-off-by: David Wang <00107082@163.com>

Do not profile the pid when pid belongs to root cgroup

Signed-off-by: David Wang <00107082@163.com>

Add light weight profiler source code