91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include "unwind.h"
|
||
|
|
#include "dso.h"
|
||
|
|
#include "map.h"
|
||
|
|
#include "thread.h"
|
||
|
|
#include "session.h"
|
||
|
|
#include "debug.h"
|
||
|
|
#include "env.h"
|
||
|
|
#include "callchain.h"
|
||
|
|
|
||
|
|
struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
|
||
|
|
struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
|
||
|
|
struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;
|
||
|
|
|
||
|
|
static void unwind__register_ops(struct maps *maps, struct unwind_libunwind_ops *ops)
|
||
|
|
{
|
||
|
|
maps->unwind_libunwind_ops = ops;
|
||
|
|
}
|
||
|
|
|
||
|
|
int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized)
|
||
|
|
{
|
||
|
|
const char *arch;
|
||
|
|
enum dso_type dso_type;
|
||
|
|
struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (!dwarf_callchain_users)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (maps->addr_space) {
|
||
|
|
pr_debug("unwind: thread map already set, dso=%s\n",
|
||
|
|
map->dso->name);
|
||
|
|
if (initialized)
|
||
|
|
*initialized = true;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* env->arch is NULL for live-mode (i.e. perf top) */
|
||
|
|
if (!maps->machine->env || !maps->machine->env->arch)
|
||
|
|
goto out_register;
|
||
|
|
|
||
|
|
dso_type = dso__type(map->dso, maps->machine);
|
||
|
|
if (dso_type == DSO__TYPE_UNKNOWN)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
arch = perf_env__arch(maps->machine->env);
|
||
|
|
|
||
|
|
if (!strcmp(arch, "x86")) {
|
||
|
|
if (dso_type != DSO__TYPE_64BIT)
|
||
|
|
ops = x86_32_unwind_libunwind_ops;
|
||
|
|
} else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) {
|
||
|
|
if (dso_type == DSO__TYPE_64BIT)
|
||
|
|
ops = arm64_unwind_libunwind_ops;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!ops) {
|
||
|
|
pr_err("unwind: target platform=%s is not supported\n", arch);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
out_register:
|
||
|
|
unwind__register_ops(maps, ops);
|
||
|
|
|
||
|
|
err = maps->unwind_libunwind_ops->prepare_access(maps);
|
||
|
|
if (initialized)
|
||
|
|
*initialized = err ? false : true;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
void unwind__flush_access(struct maps *maps)
|
||
|
|
{
|
||
|
|
if (maps->unwind_libunwind_ops)
|
||
|
|
maps->unwind_libunwind_ops->flush_access(maps);
|
||
|
|
}
|
||
|
|
|
||
|
|
void unwind__finish_access(struct maps *maps)
|
||
|
|
{
|
||
|
|
if (maps->unwind_libunwind_ops)
|
||
|
|
maps->unwind_libunwind_ops->finish_access(maps);
|
||
|
|
}
|
||
|
|
|
||
|
|
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
|
||
|
|
struct thread *thread,
|
||
|
|
struct perf_sample *data, int max_stack,
|
||
|
|
bool best_effort)
|
||
|
|
{
|
||
|
|
if (thread->maps->unwind_libunwind_ops)
|
||
|
|
return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data,
|
||
|
|
max_stack, best_effort);
|
||
|
|
return 0;
|
||
|
|
}
|