// SPDX-License-Identifier: GPL-2.0 #include <linux/types.h> #include <linux/string.h> #include <linux/zalloc.h> #include "../../../util/event.h" #include "../../../util/synthetic-events.h" #include "../../../util/machine.h" #include "../../../util/tool.h" #include "../../../util/map.h" #include "../../../util/debug.h" #if defined(__x86_64__) int perf_event__synthesize_extra_kmaps(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine) { int rc = 0; struct map *pos; struct maps *kmaps = &machine->kmaps; union perf_event *event = zalloc(sizeof(event->mmap) + machine->id_hdr_size); if (!event) { pr_debug("Not enough memory synthesizing mmap event " "for extra kernel maps\n"); return -1; } maps__for_each_entry(kmaps, pos) { struct kmap *kmap; size_t size; if (!__map__is_extra_kernel_map(pos)) continue; kmap = map__kmap(pos); size = sizeof(event->mmap) - sizeof(event->mmap.filename) + PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) + machine->id_hdr_size; memset(event, 0, size); event->mmap.header.type = PERF_RECORD_MMAP; /* * kernel uses 0 for user space maps, see kernel/perf_event.c * __perf_event_mmap */ if (machine__is_host(machine)) event->header.misc = PERF_RECORD_MISC_KERNEL; else event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; event->mmap.header.size = size; event->mmap.start = pos->start; event->mmap.len = pos->end - pos->start; event->mmap.pgoff = pos->pgoff; event->mmap.pid = machine->pid; strlcpy(event->mmap.filename, kmap->name, PATH_MAX); if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { rc = -1; break; } } free(event); return rc; } #endif