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feat: add callgrind_toggle_collect helper #29

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Merged
not-matthias merged 1 commit into from
Jun 11, 2026
Merged

feat: add callgrind_toggle_collect helper #29

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4 changes: 4 additions & 0 deletions dist/core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -61296,6 +61296,8 @@ void callgrind_start_instrumentation() {}

void callgrind_stop_instrumentation() {}

void callgrind_toggle_collect() {}

void callgrind_add_obj_skip(uint8_t const *path) { (void)path; }
#else
#include "callgrind.h"
Expand All @@ -61315,6 +61317,8 @@ void callgrind_start_instrumentation() { CALLGRIND_START_INSTRUMENTATION; }

void callgrind_stop_instrumentation() { CALLGRIND_STOP_INSTRUMENTATION; }

void callgrind_toggle_collect() { CALLGRIND_TOGGLE_COLLECT; }

void callgrind_add_obj_skip(uint8_t const *path) {
CALLGRIND_ADD_OBJ_SKIP(path);
}
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7 changes: 7 additions & 0 deletions includes/core.h
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Expand Up @@ -49,6 +49,13 @@ uint64_t instrument_hooks_current_timestamp(void);
void callgrind_start_instrumentation();
void callgrind_stop_instrumentation();

// Toggle callgrind cost collection on/off without re-instrumenting.
// Unlike start/stop instrumentation, this does not flush the simulated
// cache, so it can be used to exclude code regions from measurement
// without introducing artificial cold-cache costs.
// Safe to call outside Valgrind: expands to a no-op.
void callgrind_toggle_collect();
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not-matthias marked this conversation as resolved.

// Register an object file path on callgrind's runtime --obj-skip list.
// Equivalent to passing --obj-skip=<path> on the valgrind command line.
// Safe to call outside Valgrind: expands to a no-op.
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4 changes: 4 additions & 0 deletions src/helpers/valgrind_wrapper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@ void callgrind_start_instrumentation() {}

void callgrind_stop_instrumentation() {}

void callgrind_toggle_collect() {}

void callgrind_add_obj_skip(uint8_t const *path) { (void)path; }
#else
#include "callgrind.h"
Expand All @@ -36,6 +38,8 @@ void callgrind_start_instrumentation() { CALLGRIND_START_INSTRUMENTATION; }

void callgrind_stop_instrumentation() { CALLGRIND_STOP_INSTRUMENTATION; }

void callgrind_toggle_collect() { CALLGRIND_TOGGLE_COLLECT; }

void callgrind_add_obj_skip(uint8_t const *path) {
CALLGRIND_ADD_OBJ_SKIP(path);
}
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