find_callers
Find who calls a C/C++ function, including indirect calls via function pointers, callbacks, and ISR vector registrations.
Instructions
Find who calls a C/C++ function — direct calls AND indirect via function pointers, callbacks, interrupt vector registrations, and struct init lists. libclang-powered: detects function-pointer assignments and ISR vector registrations that text-based search cannot see.
Falls back to macro lookup when the symbol is not found as a function/method: returns the macro definition (kind="macro") and files that use it (ref_kind="macro_use").
Use when you need a quick, flat list of immediate callers. For the full
transitive call tree (who calls this indirectly through other functions),
use find_all_callers_recursive. For all references including reads
and member accesses, use find_references. For a path between two
specific symbols, use find_call_path.
Read-only. No side effects. Requires the reference index
(fw-context index — refs are on by default). Only direct call
sites are returned; callers more than one hop away are not included.
Indirect edges (ref_kind: "indirect") are detected when a function
pointer references a function through:
Call arguments:
callback(&Class::method, this),EventQueue::call_every(ms, obj, &handler)Assignments:
driver.onData = &handleData,global_cb = &handlerVariable initializers:
static void (*fp)(int) = &handlerStruct/array init lists:
{.on_data = &handler},{&fn_a, &fn_b}
Args:
name: Symbol name to find callers of. Uses the same three-tier
resolution as find_references (exact name, exact qualified,
suffix LIKE).
project_root: Project root directory. Auto-detected if omitted.
limit: Maximum results (default 50).
Returns:
list of dicts, each with: file, line, ref_kind ("call",
"indirect", "implicit_construct", or "macro_use"),
caller (enclosing function name), caller_kind ("function",
"method", …). Macro fallback includes a leading dict with
kind="macro", value, and expanded_value.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | Symbol name to find callers of. Returns direct call sites and indirect calls via function pointers. | |
| image | No | Sysbuild image name within the variant (multi-project). Omit for all images of the variant. | |
| limit | No | Maximum results. | |
| variant | No | Build variant name (multi-project). Omit to use default_variant or fail-closed. Use '*' for all variants. | |
| project_root | No | Project root. Auto-detected if omitted. |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |