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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/util/unwind-libunwind.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
-rw-r--r-- | tools/perf/util/unwind-libunwind.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c new file mode 100644 index 000000000..e89a5479b --- /dev/null +++ b/tools/perf/util/unwind-libunwind.c @@ -0,0 +1,88 @@ +// 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) +{ + if (thread->maps->unwind_libunwind_ops) + return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack); + return 0; +} |