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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Ian RogersandArnaldo Carvalho de Melo
4248ae6e79
Currently, both libdw and libunwind define 'unwind__get_entries'. This
causes a duplicate symbol build failure when both are compiled into
perf.
This commit refactors the DWARF unwind post-processing to be
configurable at runtime via the .perfconfig file option
'unwind.style', or using the argument '--unwind-style' in the commands
'perf report', 'perf script' and 'perf inject', in a similar manner to
the addr2line or the disassembler style.
The file 'tools/perf/util/unwind.c' adds the top-level dispatch
function 'unwind__get_entries'. The backend implementations are
renamed to 'libdw__get_entries' and 'libunwind__get_entries'. Both are
attempted as fallbacks if not configured, or if the primary backend
fails.
Fixes: 2e9191573a ("perf build: Remove NO_LIBDW_DWARF_UNWIND option")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andrew Jones <andrew.jones@oss.qualcomm.com>
Cc: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: libunwind-devel@nongnu.org
Cc: Li Guan <guanli.oerv@isrc.iscas.ac.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shimin Guo <shimin.guo@skydio.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tomas Glozar <tglozar@redhat.com>
Cc: Will Deacon <will@kernel.org>
[ Don't mix declarations and code, move 'entries' variable to the start of scope ]
[ Use pr_warning_once() instead of pr_err() in stubs for get_entries(), suggested by a local sashiko instance ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_SYMBOL_CONF
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#define __PERF_SYMBOL_CONF 1
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#include <stdbool.h>
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#include <linux/bitmap.h>
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#include "perf.h"
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struct strlist;
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struct intlist;
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enum unwind_style {
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UNWIND_STYLE_UNKNOWN = 0,
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UNWIND_STYLE_LIBDW,
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UNWIND_STYLE_LIBUNWIND,
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};
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#define MAX_UNWIND_STYLE (UNWIND_STYLE_LIBUNWIND + 1)
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enum a2l_style {
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A2L_STYLE_UNKNOWN = 0,
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A2L_STYLE_LIBDW,
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A2L_STYLE_LLVM,
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A2L_STYLE_LIBBFD,
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A2L_STYLE_CMD,
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};
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#define MAX_A2L_STYLE (A2L_STYLE_CMD + 1)
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struct symbol_conf {
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bool nanosecs;
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unsigned short priv_size;
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bool try_vmlinux_path,
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init_annotation,
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force,
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ignore_vmlinux,
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ignore_vmlinux_buildid,
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show_kernel_path,
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use_modules,
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allow_aliases,
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show_nr_samples,
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show_total_period,
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use_callchain,
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cumulate_callchain,
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show_branchflag_count,
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exclude_other,
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show_cpu_utilization,
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initialized,
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kptr_restrict,
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event_group,
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demangle,
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demangle_kernel,
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filter_relative,
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show_hist_headers,
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has_filter,
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show_ref_callgraph,
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hide_unresolved,
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raw_trace,
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report_hierarchy,
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report_block,
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report_individual_block,
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inline_name,
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addr2line_disable_warn,
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no_buildid_mmap2,
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guest_code,
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lazy_load_kernel_maps,
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keep_exited_threads,
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annotate_data_member,
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annotate_data_sample,
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skip_empty,
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enable_latency,
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prefer_latency;
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const char *vmlinux_name,
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*kallsyms_name,
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*source_prefix,
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*field_sep,
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*graph_function;
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const char *default_guest_vmlinux_name,
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*default_guest_kallsyms,
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*default_guest_modules;
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const char *guestmount;
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const char *dso_list_str,
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*comm_list_str,
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*pid_list_str,
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*tid_list_str,
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*sym_list_str,
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*parallelism_list_str,
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*col_width_list_str,
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*bt_stop_list_str;
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const char *addr2line_path;
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enum a2l_style addr2line_style[MAX_A2L_STYLE];
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int addr2line_timeout_ms;
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enum unwind_style unwind_style[MAX_UNWIND_STYLE];
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unsigned long time_quantum;
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struct strlist *dso_list,
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*comm_list,
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*sym_list,
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*dso_from_list,
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*dso_to_list,
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*sym_from_list,
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*sym_to_list,
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*bt_stop_list;
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struct intlist *pid_list,
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*tid_list,
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*addr_list;
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const char *symfs;
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bool symfs_layout_flat;
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int res_sample;
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int pad_output_len_dso;
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int group_sort_idx;
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int addr_range;
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DECLARE_BITMAP(parallelism_filter, MAX_NR_CPUS + 1);
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};
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extern struct symbol_conf symbol_conf;
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#endif // __PERF_SYMBOL_CONF
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