diff options
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index c83832b555e5..0ae8844fe7a6 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -614,10 +614,22 @@ void unwind__finish_access(struct thread *thread) static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb, void *arg, int max_stack) { + u64 val; unw_addr_space_t addr_space; unw_cursor_t c; int ret; + ret = perf_reg_value(&val, &ui->sample->user_regs, PERF_REG_IP); + if (ret) + return ret; + + ret = entry(val, ui->thread, cb, arg); + if (ret) + return -ENOMEM; + + if (--max_stack == 0) + return 0; + addr_space = thread__priv(ui->thread); if (addr_space == NULL) return -1; @@ -640,24 +652,17 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg, struct thread *thread, struct perf_sample *data, int max_stack) { - u64 ip; struct unwind_info ui = { .sample = data, .thread = thread, .machine = thread->mg->machine, }; - int ret; if (!data->user_regs.regs) return -EINVAL; - ret = perf_reg_value(&ip, &data->user_regs, PERF_REG_IP); - if (ret) - return ret; - - ret = entry(ip, thread, cb, arg); - if (ret) - return -ENOMEM; + if (max_stack <= 0) + return -EINVAL; - return --max_stack > 0 ? get_entries(&ui, cb, arg, max_stack) : 0; + return get_entries(&ui, cb, arg, max_stack); } |