STRUCT CALL_PATH(9)

💅 struct call_path(9) — Kernel API Manual, and yes bestie we're getting into it 🫶

🌸 NAME 🌸

struct call_path is literally a node in the list of calls leading to a function call. That's it, that's the whole name, and honestly? iconic. 💖

✨ SYNOPSIS ✨

Okay so here's the struct in all its main-character glory 👑:

       struct call_path {
           struct call_path *parent;
           struct symbol *sym;
           u64 ip;
           u64 db_id;
           bool in_kernel;
           struct rb_node rb_node;
           struct rb_root children;
        };

No cap, every field is doing its little job. 🎀

🎀 Members 🎀

• parent — call path to the parent function call. It's giving "who brought me here" energy. 🌈
• sym — symbol of function called. The main character of this particular call, lowkey. ⭐
• ip — only if sym is null, the ip of the function. Periodt. 💅
• db_id — id used for db-export. It's the little ID tag for the db-export vibe. 🏷️
• in_kernel — whether the function is in the kernel. Yes bestie, kernel-space check. 🧚
• rb_node — node in parent's tree of called functions. Tree gossip, but make it red-black. 🌳
• children — tree of call paths of functions called. The descendants! The next generation! Obsessed. 🦋

🦋 Description 🦋

In combination with the call_return structure, the call_path structure defines a context-sensitive call-graph. That's the vibe: together they're lowkey building the whole context-sensitive call-graph, and it ate 😭🔥

🔥 SEE ALSO 🔥

• Kernel file ./tools/perf/util/call-path.h — go read the source, bestie, it's right there. 💜
• struct call_path_root(9) — the cross-ref you want next, fr fr. 🦋

xoxo, your Unix bestie 💖 — source/version ./tools/perf/util, dated October 2026, signing off for struct call_path(9) ✨