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https://github.com/torvalds/linux
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79b6bb73f8
And pick the shortest name: 'struct maps'. The split existed because we used to have two groups of maps, one for functions and one for variables, but that only complicated things, sometimes we needed to figure out what was at some address and then had to first try it on the functions group and if that failed, fall back to the variables one. That split is long gone, so for quite a while we had only one struct maps per struct map_groups, simplify things by combining those structs. First patch is the minimum needed to merge both, follow up patches will rename 'thread->mg' to 'thread->maps', etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-hom6639ro7020o708trhxh59@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/zalloc.h>
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#include "../../util/event.h"
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#include "../../util/synthetic-events.h"
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#include "../../util/machine.h"
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#include "../../util/tool.h"
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#include "../../util/map.h"
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#include "../../util/debug.h"
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#if defined(__x86_64__)
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int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
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perf_event__handler_t process,
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struct machine *machine)
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{
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int rc = 0;
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struct map *pos;
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struct maps *kmaps = &machine->kmaps;
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union perf_event *event = zalloc(sizeof(event->mmap) +
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machine->id_hdr_size);
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if (!event) {
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pr_debug("Not enough memory synthesizing mmap event "
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"for extra kernel maps\n");
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return -1;
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}
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maps__for_each_entry(kmaps, pos) {
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struct kmap *kmap;
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size_t size;
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if (!__map__is_extra_kernel_map(pos))
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continue;
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kmap = map__kmap(pos);
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size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
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PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
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machine->id_hdr_size;
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memset(event, 0, size);
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event->mmap.header.type = PERF_RECORD_MMAP;
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/*
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* kernel uses 0 for user space maps, see kernel/perf_event.c
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* __perf_event_mmap
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*/
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if (machine__is_host(machine))
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event->header.misc = PERF_RECORD_MISC_KERNEL;
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else
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event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
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event->mmap.header.size = size;
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event->mmap.start = pos->start;
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event->mmap.len = pos->end - pos->start;
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event->mmap.pgoff = pos->pgoff;
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event->mmap.pid = machine->pid;
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strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
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if (perf_tool__process_synth_event(tool, event, machine,
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process) != 0) {
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rc = -1;
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break;
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}
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}
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free(event);
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return rc;
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}
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#endif
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