3f8f25c696f9c4e352a4d705ba767af676421564
6638
Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Leo Yan
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7eec00a747 |
perf symbols: Consolidate symbol fixup issue
After copying Arm64's perf archive with object files and perf.data file to x86 laptop, the x86's perf kernel symbol resolution fails. It outputs 'unknown' for all symbols parsing. This issue is root caused by the function elf__needs_adjust_symbols(), x86 perf tool uses one weak version, Arm64 (and powerpc) has rewritten their own version. elf__needs_adjust_symbols() decides if need to parse symbols with the relative offset address; but x86 building uses the weak function which misses to check for the elf type 'ET_DYN', so that it cannot parse symbols in Arm DSOs due to the wrong result from elf__needs_adjust_symbols(). The DSO parsing should not depend on any specific architecture perf building; e.g. x86 perf tool can parse Arm and Arm64 DSOs, vice versa. And confirmed by Naveen N. Rao that powerpc64 kernels are not being built as ET_DYN anymore and change to ET_EXEC. This patch removes the arch specific functions for Arm64 and powerpc and changes elf__needs_adjust_symbols() as a common function. In the common elf__needs_adjust_symbols(), it checks an extra condition 'ET_DYN' for elf header type. With this fixing, the Arm64 DSO can be parsed properly with x86's perf tool. Before: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 [unknown] ([kernel.kallsyms]) => ffff800010c4eaec [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec [unknown] ([kernel.kallsyms]) => ffff800010c4eb00 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 [unknown] ([kernel.kallsyms]) => ffff800010c4e780 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 [unknown] ([kernel.kallsyms]) => ffff800010c4eeac [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc [unknown] ([kernel.kallsyms]) => ffff800010c4ed80 [unknown] ([kernel.kallsyms]) After: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c coresight_timeout+0x54 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 coresight_timeout+0x68 ([kernel.kallsyms]) => ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) => ffff800010c4eb00 etm4_enable_hw+0x3e0 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 etm4_enable_hw+0x3e8 ([kernel.kallsyms]) => ffff800010c4e780 etm4_enable_hw+0x60 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 etm4_enable_hw+0x80 ([kernel.kallsyms]) => ffff800010c4eeac etm4_enable+0x2d4 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc etm4_enable+0x2e4 ([kernel.kallsyms]) => ffff800010c4ed80 etm4_enable+0x1a8 ([kernel.kallsyms]) v3: Changed to check for ET_DYN across all architectures. v2: Fixed Arm64 and powerpc native building. Reported-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Enrico Weigelt <info@metux.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: John Garry <john.garry@huawei.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Link: http://lore.kernel.org/lkml/20200306015759.10084-1-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Ian Rogers
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d4953f7ef1 |
perf parse-events: Fix 3 use after frees found with clang ASAN
Reproducible with a clang asan build and then running perf test in particular 'Parse event definition strings'. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200314170356.62914-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Ingo Molnar
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d1c9f7d117 |
Merge tag 'perf-core-for-mingo-5.7-20200317' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: perf record: Alexey Budankov: - Fix binding of AIO user space buffers to nodes maps: Dominik b. Czarnota: - Fix off by one in strncpy() size argument. Arnaldo Carvalho de Melo: - Use strstarts() to look for Android libraries. Ian Rogers: - Give synthetic mmap events an inode generation. man pages: Ian Rogers: - Set man page date to last git commit. perf test: Ian Rogers: - Print if shell directory isn't present. perf report: Jin Yao: - Fix no branch type statistics report issue. perf expr: Jiri Olsa: - Fix copy/paste mistake vendor events: Kan Liang: - Support metric constraints. vendor events intel: Kan Liang: - Add NO_NMI_WATCHDOG metric constraint. vendor events s390: Thomas Richter: - Add new deflate counters for IBM z15. ARM cs-etm: Leo Yan: - Last branch improvements. intel-pt: Adrian Hunter: - Update intel-pt.txt file with new location of the documentation. - Add Intel PT man page references. - Rename intel-pt.txt and put it in man page format. perl scripting: Michael Petlan: - Add common_callchain to fix argument order. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Conflicts: tools/perf/util/map.c |
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Ingo Molnar
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409e1a3140 |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Jiri Olsa
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59a08b4b3b |
perf expr: Fix copy/paste mistake
Copy/paste leftover from recent refactor.
Fixes:
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Ian Rogers
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3b7a15b064 |
perf tools: Give synthetic mmap events an inode generation
When mmap2 events are synthesized the ino_generation field isn't being
set leading to uninitialized memory being compared.
Caught with clang's -fsanitize=memory:
==124733==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55a96a6a65cc in __dso_id__cmp tools/perf/util/dsos.c:23:6
#1 0x55a96a6a81d5 in dso_id__cmp tools/perf/util/dsos.c:38:9
#2 0x55a96a6a717f in __dso__cmp_long_name tools/perf/util/dsos.c:74:15
#3 0x55a96a6a6c4c in __dsos__findnew_link_by_longname_id tools/perf/util/dsos.c:106:12
#4 0x55a96a6a851e in __dsos__findnew_by_longname_id tools/perf/util/dsos.c:178:9
#5 0x55a96a6a7798 in __dsos__find_id tools/perf/util/dsos.c:191:9
#6 0x55a96a6a7b57 in __dsos__findnew_id tools/perf/util/dsos.c:251:20
#7 0x55a96a6a7a57 in dsos__findnew_id tools/perf/util/dsos.c:259:17
#8 0x55a96a7776ae in machine__findnew_dso_id tools/perf/util/machine.c:2709:9
#9 0x55a96a77dfcf in map__new tools/perf/util/map.c:193:10
#10 0x55a96a77240a in machine__process_mmap2_event tools/perf/util/machine.c:1670:8
#11 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#12 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#13 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#14 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#15 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#16 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#17 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#18 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#19 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#20 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#21 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#22 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#23 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#24 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#25 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#26 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#27 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#28 0x55a96a282223 in main tools/perf/perf.c:538:3
Uninitialized value was stored to memory at
#1 0x55a96a6a18f7 in dso__new_id tools/perf/util/dso.c:1230:14
#2 0x55a96a6a78ee in __dsos__addnew_id tools/perf/util/dsos.c:233:20
#3 0x55a96a6a7bcc in __dsos__findnew_id tools/perf/util/dsos.c:252:21
#4 0x55a96a6a7a57 in dsos__findnew_id tools/perf/util/dsos.c:259:17
#5 0x55a96a7776ae in machine__findnew_dso_id tools/perf/util/machine.c:2709:9
#6 0x55a96a77dfcf in map__new tools/perf/util/map.c:193:10
#7 0x55a96a77240a in machine__process_mmap2_event tools/perf/util/machine.c:1670:8
#8 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#9 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#10 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#11 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#12 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#13 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#14 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#15 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#16 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#17 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#18 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#19 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
Uninitialized value was stored to memory at
#0 0x55a96a7725af in machine__process_mmap2_event tools/perf/util/machine.c:1646:25
#1 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#2 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#3 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#4 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#5 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#6 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#7 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#8 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#9 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#10 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#11 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#12 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#13 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#14 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#15 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#16 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#17 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#18 0x55a96a282223 in main tools/perf/perf.c:538:3
Uninitialized value was created by a heap allocation
#0 0x55a96a22f60d in malloc llvm/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:925:3
#1 0x55a96a882948 in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:655:15
#2 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#3 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#4 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#5 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#6 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#7 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#8 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#9 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#10 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#11 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#12 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#13 0x55a96a282223 in main tools/perf/perf.c:538:3
SUMMARY: MemorySanitizer: use-of-uninitialized-value tools/perf/util/dsos.c:23:6 in __dso_id__cmp
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20200313053129.131264-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Alexey Budankov
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44d462acc0 |
perf record: Fix binding of AIO user space buffers to nodes
Correct maxnode parameter value passed to mbind() syscall to be the
amount of node mask bits to analyze plus 1. Dynamically allocate node
mask memory depending on the index of node of cpu being profiled.
Fixes:
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Leo Yan
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bc010dd657 |
perf cs-etm: Fix unsigned variable comparison to zero
The variable 'offset' in function cs_etm__sample() is u64 type, it's not appropriate to check it with 'while (offset > 0)'; this patch changes to 'while (offset)'. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-6-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Leo Yan
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695378b567 |
perf cs-etm: Optimize copying last branches
If an instruction range packet can generate multiple instruction samples, these samples share the same last branches; it's not necessary to copy the same last branches repeatedly for these samples within the same packet. This patch moves out the last branches copying from function cs_etm__synth_instruction_sample(), and execute it prior to generating instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-5-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Leo Yan
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c9f5baa136 |
perf cs-etm: Correct synthesizing instruction samples
When 'etm->instructions_sample_period' is less than 'tidq->period_instructions', the function cs_etm__sample() cannot handle this case properly with its logic. Let's see below flow as an example: - If we set itrace option '--itrace=i4', then function cs_etm__sample() has variables with initialized values: tidq->period_instructions = 0 etm->instructions_sample_period = 4 - When the first packet is coming: packet->instr_count = 10; the number of instructions executed in this packet is 10, thus update period_instructions as below: tidq->period_instructions = 0 + 10 = 10 instrs_over = 10 - 4 = 6 offset = 10 - 6 - 1 = 3 tidq->period_instructions = instrs_over = 6 - When the second packet is coming: packet->instr_count = 10; in the second pass, assume 10 instructions in the trace sample again: tidq->period_instructions = 6 + 10 = 16 instrs_over = 16 - 4 = 12 offset = 10 - 12 - 1 = -3 -> the negative value tidq->period_instructions = instrs_over = 12 So after handle these two packets, there have below issues: The first issue is that cs_etm__instr_addr() returns the address within the current trace sample of the instruction related to offset, so the offset is supposed to be always unsigned value. But in fact, function cs_etm__sample() might calculate a negative offset value (in handling the second packet, the offset is -3) and pass to cs_etm__instr_addr() with u64 type with a big positive integer. The second issue is it only synthesizes 2 samples for sample period = 4. In theory, every packet has 10 instructions so the two packets have total 20 instructions, 20 instructions should generate 5 samples (4 x 5 = 20). This is because cs_etm__sample() only calls once cs_etm__synth_instruction_sample() to generate instruction sample per range packet. This patch fixes the logic in function cs_etm__sample(); the basic idea for handling coming packet is: - To synthesize the first instruction sample, it combines the left instructions from the previous packet and the head of the new packet; then generate continuous samples with sample period; - At the tail of the new packet, if it has the rest instructions, these instructions will be left for the sequential sample. Suggested-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-4-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Leo Yan
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f1410028c7 |
perf cs-etm: Continuously record last branch
Every time synthesize instruction sample, the last branch recording will be reset. This is fine if the instruction period is big enough, for example if use the option '--itrace=i100000', the last branch array is reset for every sample with 100000 instructions per period; before generate the next instruction sample, there has the sufficient packets coming to fill the last branch array. On the other hand, if set a very small period, the packets will be significantly reduced between two continuous instruction samples, thus the last branch array is almost empty for new instruction sample by frequently resetting. To allow the last branches to work properly for any instruction periods, this patch avoids to reset the last branch for every instruction sample and only reset it when flush the trace data. The last branches will be reset only for two cases, one is for trace starting, another case is for discontinuous trace; other cases can keep recording last branches for continuous instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Leo Yan
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d01751563c |
perf cs-etm: Swap packets for instruction samples
If use option '--itrace=iNNN' with Arm CoreSight trace data, perf tool fails inject instruction samples; the root cause is the packets are only swapped for branch samples and last branches but not for instruction samples, so the new coming packets cannot be properly handled for only synthesizing instruction samples. To fix this issue, this patch refactors the code with a new function cs_etm__packet_swap() which is used to swap packets and adds the condition for instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-2-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
bdadd647cb |
perf map: Use strstarts() to look for Android libraries
And add the '/' to avoid looking at things like "/system/libsomething", when all we want to know if it is like "/system/lib/something", i.e. if it is in that system library dir. Using strstarts() avoids off-by-one errors like recently fixed in this file. Since this adds the '/' I separated this patch, another patch will make this consistent by removing other strncmp(str, prefix, manually calculated prefix length) usage. Reported-by: Dominik Czarnota <dominik.b.czarnota@gmail.com> Acked-by: Dominik Czarnota <dominik.b.czarnota@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: Link: http://lore.kernel.org/lkml/CABEVAa0_q-uC0vrrqpkqRHy_9RLOSXOJxizMLm1n5faHRy2AeA@mail.gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
disconnect3d
|
b8fdcfb5a1 |
perf map: Fix off by one in strncpy() size argument
This patch fixes an off-by-one error in strncpy size argument in
tools/perf/util/map.c. The issue is that in:
strncmp(filename, "/system/lib/", 11)
the passed string literal: "/system/lib/" has 12 bytes (without the NULL
byte) and the passed size argument is 11. As a result, the logic won't
match the ending "/" byte and will pass filepaths that are stored in
other directories e.g. "/system/libmalicious/bin" or just
"/system/libmalicious".
This functionality seems to be present only on Android. I assume the
/system/ directory is only writable by the root user, so I don't think
this bug has much (or any) security impact.
Fixes:
|
||
|
Kan Liang
|
ab483d8bc8 |
perf metricgroup: Support metric constraint
Some metric groups have metric constraints. A metric group can be scheduled as a group only when some constraints are applied. For example, Page_Walks_Utilization has a metric constraint, "NO_NMI_WATCHDOG". When NMI watchdog is disabled, the metric group can be scheduled as a group. Otherwise, splitting the metric group into standalone metrics. Add a new function, metricgroup__has_constraint(), to check whether all constraints are applied. If not, splitting the metric group into standalone metrics. Currently, only one constraint, "NO_NMI_WATCHDOG", is checked. Print a warning for the metric group with the constraint, when NMI WATCHDOG is enabled. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-5-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
2a14c1bf01 |
perf util: Factor out sysctl__nmi_watchdog_enabled()
The NMI watchdog status is required for metric group constraint examination. Factor out sysctl__nmi_watchdog_enabled() to retrieve the NMI watchdog status. Users may count more than one metric group each time. If so, the NMI watchdog status may be retrieved several times. To reduce the overhead, cache the NMI watchdog status. Replace the NMI watchdog status checking in print_footer() by sysctl__nmi_watchdog_enabled(). Suggested-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-4-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
f742634ab4 |
perf metricgroup: Factor out metricgroup__add_metric_weak_group()
Factor out metricgroup__add_metric_weak_group() which add metrics into a weak group. The change can improve code readability. Because following patch will introduce a function which add standalone metrics. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-3-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
f787feff69 |
perf block-info: Support color ops to print block percents in color
It would be nice to print the block percents with colors. This patch supports the 'Sampled Cycles%' and 'Avg Cycles%' printed in colors. For example, perf record -b ... perf report --total-cycles or perf report --total-cycles --stdio percent > 5%, colored in red percent > 0.5%, colored in green percent < 0.5%, default color Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-5-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
cca0cc76f5 |
perf block-info: Allow selecting which columns to report and its order
Currently we use a predefined array to set the block info output formats, it's fixed and inflexible. This patch adds two parameters "block_hpps" and "nr_hpps" in block_info__create_report and other static functions, in order to let user decide which columns to report and with specified report ordering. It should be more flexible. Buffers will be allocated to contain the new fmts, of course, we need to release them before perf exits. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
a8a9f6dc0d |
perf diff: Use __block_info__cmp() to replace block_pair_cmp()
'perf diff' uses block_pair_cmp() to compare two blocks. But block_info__cmp() has the similar functionality and it's a bit more complete. This patch removes block_pair_cmp() and uses __block_info__cmp() instead. __block_info__cmp() is wrapped by block_info__cmp() and it doesn't receives a perf_hpp_fmt parameter. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-3-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
3e152aa984 |
perf block-info: Fix wrong block address comparison in block_info__cmp()
Commit |
||
|
Jiri Olsa
|
d942815a76 |
perf expr: Make expr__parse() return -1 on error
To match the error value of the expr__find_other function, so all exported expr functions return the same values: 0 on success, -1 on error. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200228093616.67125-6-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
0f9b1e124b |
perf expr: Straighten expr__parse()/expr__find_other() interface
Now that we have a flex parser we don't need to update the parsed string pointer, so the interface can just be passed the pointer to the expression instead of a pointer to pointer. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200228093616.67125-5-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
58ca707636 |
perf expr: Increase EXPR_MAX_OTHER to support metrics with more than 15 variables
We have metrics that define more than 15 variables, like Branch_Misprediction_Cost. Increasing the allowed variables count to 20. As Andy pointed out, we can't go too high in here, because some of the code has O(n^2) complexity (already_seen) and we might want to do some other changes (like using hash tables) before increasing the maximum even more. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200228093616.67125-4-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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|
Jiri Olsa
|
26226a9772 |
perf expr: Move expr lexer to flex
Adding expr flex code instead of the manual parser code. So it's easily extensible in upcoming changes. The new flex code is in flex.l object and gets compiled like all the other flexers we use. It's defined as flex reentrant parser. It's used by both expr__parse and expr__find_other interfaces by separating the starting point. There's no intended change of functionality ;-) the test expr is passing. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200228093616.67125-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
576a65b697 |
perf expr: Add expr.c object
Add generic expr code into new expr.c object. The expr.c object will be mainly used in following change that will get rid of the manual flex code, Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200228093616.67125-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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|
Kan Liang
|
277ce1efa7 |
perf header: Add check for unexpected use of reserved membrs in event attr
The perf.data may be generated by a newer version of perf tool, which support new input bits in attr, e.g. new bit for branch_sample_type. The perf.data may be parsed by an older version of perf tool later. The old perf tool may parse the perf.data incorrectly. There is no warning message for this case. Current perf header never check for unknown input bits in attr. When read the event desc from header, check the stored event attr. The reserved bits, sample type, read format and branch sample type will be checked. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lkml.kernel.org/r/20200228163011.19358-4-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
d3f85437ad |
perf evsel: Support PERF_SAMPLE_BRANCH_HW_INDEX
A new branch sample type PERF_SAMPLE_BRANCH_HW_INDEX has been introduced
in latest kernel.
Enable HW_INDEX by default in LBR call stack mode.
If kernel doesn't support the sample type, switching it off.
Add HW_INDEX in attr_fprintf as well. User can check whether the branch
sample type is set via debug information or header.
Committer testing:
First collect some samples with LBR callchains, system wide, for a few
seconds:
# perf record --call-graph lbr -a sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.625 MB perf.data (224 samples) ]
#
Now lets use 'perf evlist -v' to look at the branch_sample_type:
# perf evlist -v
cycles: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD|BRANCH_STACK, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES|HW_INDEX
#
So the machine has the kernel feature, and it was correctly added to
perf_event_attr.branch_sample_type, for the default 'cycles' event.
If we do it in another machine, where the kernel lacks the HW_INDEX
feature, we get:
# perf record --call-graph lbr -a sleep 2s
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.690 MB perf.data (499 samples) ]
# perf evlist -v
cycles: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD|BRANCH_STACK, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES
#
No HW_INDEX in attr.branch_sample_type.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200228163011.19358-3-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
42bbabed09 |
perf tools: Add hw_idx in struct branch_stack
The low level index of raw branch records for the most recent branch can be recorded in a sample with PERF_SAMPLE_BRANCH_HW_INDEX branch_sample_type. Extend struct branch_stack to support it. However, if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied, only nr and entries[] will be output by kernel. The pointer of entries[] could be wrong, since the output format is different with new struct branch_stack. Add a variable no_hw_idx in struct perf_sample to indicate whether the hw_idx is output. Add get_branch_entry() to return corresponding pointer of entries[0]. To make dummy branch sample consistent as new branch sample, add hw_idx in struct dummy_branch_stack for cs-etm and intel-pt. Apply the new struct branch_stack for synthetic events as well. Extend test case sample-parsing to support new struct branch_stack. Committer notes: Renamed get_branch_entries() to perf_sample__branch_entries() to have proper namespacing and pave the way for this to be moved to libperf, eventually. Add 'static' to that inline as it is in a header. Add 'hw_idx' to 'struct dummy_branch_stack' in cs-etm.c to fix the build on arm64. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200228163011.19358-2-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Masami Hiramatsu
|
1efde27542 |
perf probe: Do not depend on dwfl_module_addrsym()
Do not depend on dwfl_module_addrsym() because it can fail on user-space shared libraries. Actually, same bug was fixed by commit |
||
|
Masami Hiramatsu
|
6b8d68f1ce |
perf probe: Fix to delete multiple probe event
When we put an event with multiple probes, perf-probe fails to delete
with filters. This comes from a failure to list up the event name
because of overwrapping its name.
To fix this issue, skip to list up the event which has same name.
Without this patch:
# perf probe -l \*
probe_perf:map__map_ip (on perf_sample__fprintf_brstackoff:21@
probe_perf:map__map_ip (on perf_sample__fprintf_brstackoff:25@
probe_perf:map__map_ip (on append_inlines:12@util/machine.c in
probe_perf:map__map_ip (on unwind_entry:19@util/machine.c in /
probe_perf:map__map_ip (on map__map_ip@util/map.h in /home/mhi
probe_perf:map__map_ip (on map__map_ip@util/map.h in /home/mhi
# perf probe -d \*
"*" does not hit any event.
Error: Failed to delete events. Reason: No such file or directory (Code: -2)
With it:
# perf probe -d \*
Removed event: probe_perf:map__map_ip
#
Fixes:
|
||
|
Ian Rogers
|
05e54e2386 |
perf parse-events: Fix reading of invalid memory in event parsing
ADD_CONFIG_TERM accesses term->weak, however, in get_config_chgs this value is accessed outside of the list_for_each_entry and references invalid memory. Add an argument for ADD_CONFIG_TERM for weak and set it to false in the get_config_chgs case. This bug was cause by clang's address sanitizer and libfuzzer. It can be reproduced with a command line of: perf stat -a -e i/bs,tsc,L2/o Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200307073121.203816-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ilie Halip
|
a7ffd416d8 |
perf python: Fix clang detection when using CC=clang-version
Currently, the setup.py script detects the clang compiler only when invoked
with CC=clang. But when using a specific version (e.g. CC=clang-11), this
doesn't work correctly and wrong compiler flags are set, leading to build
errors.
To properly detect clang, invoke the compiler with -v and check the output.
The first line should start with "clang version ...".
Committer testing:
$ make CC=clang-9 O=/tmp/build/perf -C tools/perf install-bin
<SNIP>
$ readelf -wi /tmp/build/perf/python/perf.cpython-37m-x86_64-linux-gnu.so | grep DW_AT_producer | head -1
<c> DW_AT_producer : (indirect string, offset: 0x0): clang version 9.0.1 (Fedora 9.0.1-2.fc31) /usr/bin/clang-9 -Wno-unused-result -Wsign-compare -D DYNAMIC_ANNOTATIONS_ENABLED=1 -D NDEBUG -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-command-line -m64 -mtune=generic -fasynchronous-unwind-tables -fcf-protection=full -D _GNU_SOURCE -fPIC -fwrapv -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Wshadow -D HAVE_ARCH_X86_64_SUPPORT -I /tmp/build/perf/arch/x86/include/generated -D HAVE_SYSCALL_TABLE_SUPPORT -D HAVE_PERF_REGS_SUPPORT -D HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET -Werror -O3 -fno-omit-frame-pointer -ggdb3 -funwind-tables -Wall -Wextra -std=gnu99 -fstack-protector-all -D _FORTIFY_SOURCE=2 -D _LARGEFILE64_SOURCE -D _FILE_OFFSET_BITS=64 -D _GNU_SOURCE -I /home/acme/git/perf/tools/lib/perf/include -I /home/acme/git/perf/tools/perf/util/include -I /home/acme/git/perf/tools/perf/arch/x86/include -I /home/acme/git/perf/tools/include/ -I /home/acme/git/perf/tools/arch/x86/include/uapi -I /home/acme/git/perf/tools/include/uapi -I /home/acme/git/perf/tools/arch/x86/include/ -I /home/acme/git/perf/tools/arch/x86/ -I /tmp/build/perf//util -I /tmp/build/perf/ -I /home/acme/git/perf/tools/perf/util -I /home/acme/git/perf/tools/perf -I /home/acme/git/perf/tools/lib/ -D HAVE_PTHREAD_ATTR_SETAFFINITY_NP -D HAVE_PTHREAD_BARRIER -D HAVE_EVENTFD -D HAVE_GET_CURRENT_DIR_NAME -D HAVE_GETTID -D HAVE_DWARF_GETLOCATIONS_SUPPORT -D HAVE_GLIBC_SUPPORT -D HAVE_AIO_SUPPORT -D HAVE_SCHED_GETCPU_SUPPORT -D HAVE_SETNS_SUPPORT -D HAVE_LIBELF_SUPPORT -D HAVE_LIBELF_MMAP_SUPPORT -D HAVE_ELF_GETPHDRNUM_SUPPORT -D HAVE_GELF_GETNOTE_SUPPORT -D HAVE_ELF_GETSHDRSTRNDX_SUPPORT -D HAVE_DWARF_SUPPORT -D HAVE_LIBBPF_SUPPORT -D HAVE_BPF_PROLOGUE -D HAVE_SDT_EVENT -D HAVE_JITDUMP -D HAVE_DWARF_UNWIND_SUPPORT -D NO_LIBUNWIND_DEBUG_FRAME -D HAVE_LIBUNWIND_SUPPORT -D HAVE_LIBCRYPTO_SUPPORT -D HAVE_SLANG_SUPPORT -D HAVE_GTK2_SUPPORT -D NO_LIBPERL -D HAVE_TIMERFD_SUPPORT -D HAVE_LIBPYTHON_SUPPORT -D HAVE_CPLUS_DEMANGLE_SUPPORT -D HAVE_LIBBFD_SUPPORT -D HAVE_ZLIB_SUPPORT -D HAVE_LZMA_SUPPORT -D HAVE_ZSTD_SUPPORT -D HAVE_LIBCAP_SUPPORT -D HAVE_BACKTRACE_SUPPORT -D HAVE_LIBNUMA_SUPPORT -D HAVE_KVM_STAT_SUPPORT -D DISASM_FOUR_ARGS_SIGNATURE -D HAVE_LIBBABELTRACE_SUPPORT -D HAVE_AUXTRACE_SUPPORT -D HAVE_JVMTI_CMLR -I /tmp/build/perf/ -fPIC -I util/include -I /usr/include/python3.7m -c /home/acme/git/perf/tools/perf/util/python.c -o /tmp/build/perf/python_ext_build/tmp/home/acme/git/perf/tools/perf/util/python.o -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Wshadow -D HAVE_ARCH_X86_64_SUPPORT -I /tmp/build/perf/arch/x86/include/generated -D HAVE_SYSCALL_TABLE_SUPPORT -D HAVE_PERF_REGS_SUPPORT -D HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET -Werror -O3 -fno-omit-frame-pointer -ggdb3 -funwind-tables -Wall -Wextra -std=gnu99 -fstack-protector-all -D _FORTIFY_SOURCE=2 -D _LARGEFILE64_SOURCE -D _FILE_OFFSET_BITS=64 -D _GNU_SOURCE -I /home/acme/git/perf/tools/lib/perf/include -I /home/acme/git/perf/tools/perf/util/include -I /home/acme/git/perf/tools/perf/arch/x86/include -I /home/acme/git/perf/tools/include/ -I /home/acme/git/perf/tools/arch/x86/include/uapi -I /home/acme/git/perf/tools/include/uapi -I /home/acme/git/perf/tools/arch/x86/include/ -I /home/acme/git/perf/tools/arch/x86/ -I /tmp/build/perf//util -I /tmp/build/perf/ -I /home/acme/git/perf/tools/perf/util -I /home/acme/git/perf/tools/perf -I /home/acme/git/perf/tools/lib/ -D HAVE_PTHREAD_ATTR_SETAFFINITY_NP -D HAVE_PTHREAD_BARRIER -D HAVE_EVENTFD -D HAVE_GET_CURRENT_DIR_NAME -D HAVE_GETTID -D HAVE_DWARF_GETLOCATIONS_SUPPORT -D HAVE_GLIBC_SUPPORT -D HAVE_AIO_SUPPORT -D HAVE_SCHED_GETCPU_SUPPORT -D HAVE_SETNS_SUPPORT -D HAVE_LIBELF_SUPPORT -D HAVE_LIBELF_MMAP_SUPPORT -D HAVE_ELF_GETPHDRNUM_SUPPORT -D HAVE_GELF_GETNOTE_SUPPORT -D HAVE_ELF_GETSHDRSTRNDX_SUPPORT -D HAVE_DWARF_SUPPORT -D HAVE_LIBBPF_SUPPORT -D HAVE_BPF_PROLOGUE -D HAVE_SDT_EVENT -D HAVE_JITDUMP -D HAVE_DWARF_UNWIND_SUPPORT -D NO_LIBUNWIND_DEBUG_FRAME -D HAVE_LIBUNWIND_SUPPORT -D HAVE_LIBCRYPTO_SUPPORT -D HAVE_SLANG_SUPPORT -D HAVE_GTK2_SUPPORT -D NO_LIBPERL -D HAVE_TIMERFD_SUPPORT -D HAVE_LIBPYTHON_SUPPORT -D HAVE_CPLUS_DEMANGLE_SUPPORT -D HAVE_LIBBFD_SUPPORT -D HAVE_ZLIB_SUPPORT -D HAVE_LZMA_SUPPORT -D HAVE_ZSTD_SUPPORT -D HAVE_LIBCAP_SUPPORT -D HAVE_BACKTRACE_SUPPORT -D HAVE_LIBNUMA_SUPPORT -D HAVE_KVM_STAT_SUPPORT -D DISASM_FOUR_ARGS_SIGNATURE -D HAVE_LIBBABELTRACE_SUPPORT -D HAVE_AUXTRACE_SUPPORT -D HAVE_JVMTI_CMLR -I /tmp/build/perf/ -fno-strict-aliasing -Wno-write-strings -Wno-unused-parameter -Wno-redundant-decls
$
And here is how tools/perf/util/setup.py checks if the used clang has
options that the distro specific python extension building compiler
defaults:
if cc_is_clang:
from distutils.sysconfig import get_config_vars
vars = get_config_vars()
for var in ('CFLAGS', 'OPT'):
vars[var] = sub("-specs=[^ ]+", "", vars[var])
if not clang_has_option("-mcet"):
vars[var] = sub("-mcet", "", vars[var])
if not clang_has_option("-fcf-protection"):
vars[var] = sub("-fcf-protection", "", vars[var])
if not clang_has_option("-fstack-clash-protection"):
vars[var] = sub("-fstack-clash-protection", "", vars[var])
if not clang_has_option("-fstack-protector-strong"):
vars[var] = sub("-fstack-protector-strong", "", vars[var])
So "-fcf-protection=full" is used, clang-9 has this option and thus it
was kept, the perf python extension was built with it and the build
completed successfully.
Link: https://github.com/ClangBuiltLinux/linux/issues/903
Signed-off-by: Ilie Halip <ilie.halip@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Igor Lubashev <ilubashe@akamai.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20200309085618.14307-1-ilie.halip@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
disconnect3d
|
db2c549407 |
perf map: Fix off by one in strncpy() size argument
This patch fixes an off-by-one error in strncpy size argument in
tools/perf/util/map.c. The issue is that in:
strncmp(filename, "/system/lib/", 11)
the passed string literal: "/system/lib/" has 12 bytes (without the NULL
byte) and the passed size argument is 11. As a result, the logic won't
match the ending "/" byte and will pass filepaths that are stored in
other directories e.g. "/system/libmalicious/bin" or just
"/system/libmalicious".
This functionality seems to be present only on Android. I assume the
/system/ directory is only writable by the root user, so I don't think
this bug has much (or any) security impact.
Fixes:
|
||
|
Nick Desaulniers
|
cfd3bc752a |
perf diff: Fix undefined string comparision spotted by clang's -Wstring-compare
clang warns:
util/block-info.c:298:18: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:51: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:18: error: result of comparison against a string
literal is unspecified (use an explicit string
comparison function instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:51: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/map.c:434:15: error: result of comparison against a string literal
is unspecified (use an explicit string comparison function instead)
[-Werror,-Wstring-compare]
if (srcline != SRCLINE_UNKNOWN)
^ ~~~~~~~~~~~~~~~
Reviewer Notes:
Looks good to me. Some more context:
https://clang.llvm.org/docs/DiagnosticsReference.html#wstring-compare
The spec says:
J.1 Unspecified behavior
The following are unspecified:
.. Whether two string literals result in distinct arrays (6.4.5).
Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Keeping <john@metanate.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/900
Link: http://lore.kernel.org/lkml/20200223193456.25291-1-nick.desaulniers@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ravi Bangoria
|
dabce16bd2 |
perf annotate: Get rid of annotation->nr_jumps
The 'nr_jumps' field in 'struct annotation' is not used since it's
inception in commit
|
||
|
Arnaldo Carvalho de Melo
|
357a5d24c4 |
perf llvm: Add debug hint message about missing kernel-devel package
To help in debugging, add this extra message: detect_kbuild_dir: Couldn't find "/lib/modules/5.4.20-200.fc31.x86_64/build/include/generated/autoconf.h", missing kernel-devel package?. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
1af62ce61c |
perf stat: Show percore counts in per CPU output
We have supported the event modifier "percore" which sums up the event
counts for all hardware threads in a core and show the counts per core.
For example,
# perf stat -e cpu/event=cpu-cycles,percore/ -a -A -- sleep 1
Performance counter stats for 'system wide':
S0-D0-C0 395,072 cpu/event=cpu-cycles,percore/
S0-D0-C1 851,248 cpu/event=cpu-cycles,percore/
S0-D0-C2 954,226 cpu/event=cpu-cycles,percore/
S0-D0-C3 1,233,659 cpu/event=cpu-cycles,percore/
This patch provides a new option "--percore-show-thread". It is used
with event modifier "percore" together to sum up the event counts for
all hardware threads in a core but show the counts per hardware thread.
This is essentially a replacement for the any bit (which is gone in
Icelake). Per core counts are useful for some formulas, e.g. CoreIPC.
The original percore version was inconvenient to post process. This
variant matches the output of the any bit.
With this patch, for example,
# perf stat -e cpu/event=cpu-cycles,percore/ -a -A --percore-show-thread -- sleep 1
Performance counter stats for 'system wide':
CPU0 2,453,061 cpu/event=cpu-cycles,percore/
CPU1 1,823,921 cpu/event=cpu-cycles,percore/
CPU2 1,383,166 cpu/event=cpu-cycles,percore/
CPU3 1,102,652 cpu/event=cpu-cycles,percore/
CPU4 2,453,061 cpu/event=cpu-cycles,percore/
CPU5 1,823,921 cpu/event=cpu-cycles,percore/
CPU6 1,383,166 cpu/event=cpu-cycles,percore/
CPU7 1,102,652 cpu/event=cpu-cycles,percore/
We can see counts are duplicated in CPU pairs (CPU0/CPU4, CPU1/CPU5,
CPU2/CPU6, CPU3/CPU7).
The interval mode also works. For example,
# perf stat -e cpu/event=cpu-cycles,percore/ -a -A --percore-show-thread -I 1000
# time CPU counts unit events
1.000425421 CPU0 925,032 cpu/event=cpu-cycles,percore/
1.000425421 CPU1 430,202 cpu/event=cpu-cycles,percore/
1.000425421 CPU2 436,843 cpu/event=cpu-cycles,percore/
1.000425421 CPU3 1,192,504 cpu/event=cpu-cycles,percore/
1.000425421 CPU4 925,032 cpu/event=cpu-cycles,percore/
1.000425421 CPU5 430,202 cpu/event=cpu-cycles,percore/
1.000425421 CPU6 436,843 cpu/event=cpu-cycles,percore/
1.000425421 CPU7 1,192,504 cpu/event=cpu-cycles,percore/
If we offline CPU5, the result is:
# perf stat -e cpu/event=cpu-cycles,percore/ -a -A --percore-show-thread -- sleep 1
Performance counter stats for 'system wide':
CPU0 2,752,148 cpu/event=cpu-cycles,percore/
CPU1 1,009,312 cpu/event=cpu-cycles,percore/
CPU2 2,784,072 cpu/event=cpu-cycles,percore/
CPU3 2,427,922 cpu/event=cpu-cycles,percore/
CPU4 2,752,148 cpu/event=cpu-cycles,percore/
CPU6 2,784,072 cpu/event=cpu-cycles,percore/
CPU7 2,427,922 cpu/event=cpu-cycles,percore/
1.001416041 seconds time elapsed
v4:
---
Ravi Bangoria reports an issue in v3. Once we offline a CPU,
the output is not correct. The issue is we should use the cpu
idx in print_percore_thread rather than using the cpu value.
v3:
---
1. Fix the interval mode output error
2. Use cpu value (not cpu index) in config->aggr_get_id().
3. Refine the code according to Jiri's comments.
v2:
---
Add the explanation in change log. This is essentially a replacement
for the any bit. No code change.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200214080452.26402-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Namhyung Kim
|
7982a89851 |
tools lib api fs: Move cgroupsfs_find_mountpoint()
Move it from tools/perf/util/cgroup.c as it can be used by other places. Note that cgroup filesystem is different from others since it's usually mounted separately (in v1) for each subsystem. I just copied the code with a little modification to pass a name of subsystem. Suggested-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200127100031.1368732-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Nick Desaulniers
|
c395c3553d |
perf diff: Fix undefined string comparison spotted by clang's -Wstring-compare
clang warns:
util/block-info.c:298:18: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:51: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:18: error: result of comparison against a string
literal is unspecified (use an explicit string
comparison function instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/block-info.c:298:51: error: result of comparison against a string
literal is unspecified (use an explicit string comparison function
instead) [-Werror,-Wstring-compare]
if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
^ ~~~~~~~~~~~~~~~
util/map.c:434:15: error: result of comparison against a string literal
is unspecified (use an explicit string comparison function instead)
[-Werror,-Wstring-compare]
if (srcline != SRCLINE_UNKNOWN)
^ ~~~~~~~~~~~~~~~
Reviewer Notes:
Looks good to me. Some more context:
https://clang.llvm.org/docs/DiagnosticsReference.html#wstring-compare
The spec says:
J.1 Unspecified behavior
The following are unspecified:
.. Whether two string literals result in distinct arrays (6.4.5).
Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Keeping <john@metanate.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/900
Link: http://lore.kernel.org/lkml/20200223193456.25291-1-nick.desaulniers@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
b5c0951860 |
perf symbols: Don't try to find a vmlinux file when looking for kernel modules
The dso->kernel value is now set to everything that is in
machine->kmaps, but that was being used to decide if vmlinux lookup is
needed, which ended up making that lookup be made for kernel modules,
that now have dso->kernel set, leading to these kinds of warnings when
running on a machine with compressed kernel modules, like fedora:31:
[root@five ~]# perf record -F 10000 -a sleep 2
[ perf record: Woken up 1 times to write data ]
lzma: fopen failed on vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /usr/lib/debug/boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /lib/modules/5.5.5-200.fc31.x86_64/build/vmlinux: 'No such file or directory'
lzma: fopen failed on vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /usr/lib/debug/boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /lib/modules/5.5.5-200.fc31.x86_64/build/vmlinux: 'No such file or directory'
lzma: fopen failed on vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /usr/lib/debug/boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /lib/modules/5.5.5-200.fc31.x86_64/build/vmlinux: 'No such file or directory'
lzma: fopen failed on vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /usr/lib/debug/boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /lib/modules/5.5.5-200.fc31.x86_64/build/vmlinux: 'No such file or directory'
lzma: fopen failed on vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux: 'No such file or directory'
lzma: fopen failed on /boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /usr/lib/debug/boot/vmlinux-5.5.5-200.fc31.x86_64: 'No such file or directory'
lzma: fopen failed on /lib/modules/5.5.5-200.fc31.x86_64/build/vmlinux: 'No such file or directory'
[ perf record: Captured and wrote 1.024 MB perf.data (1366 samples) ]
[root@five ~]#
This happens when collecting the buildid, when we find samples for
kernel modules, fix it by checking if the looked up DSO is a kernel
module by other means.
Fixes:
|
||
|
Arnaldo Carvalho de Melo
|
7125f20450 |
perf parse-events: Use asprintf() instead of strncpy() to read tracepoint files
Make the code more compact by using asprintf() instead of malloc()+strncpy() which also uses
less memory and avoids these warnings with gcc 10:
CC /tmp/build/perf/util/cloexec.o
In file included from /usr/include/string.h:495,
from util/parse-events.h:12,
from util/parse-events.c:18:
In function ‘strncpy’,
inlined from ‘tracepoint_id_to_path’ at util/parse-events.c:271:5:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ offset [275, 511] from the object at ‘sys_dirent’ is out of the bounds of referenced subobject ‘d_name’ with type ‘char[256]’ at offset 19 [-Werror=array-bounds]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/dirent.h:61,
from util/parse-events.c:5:
util/parse-events.c: In function ‘tracepoint_id_to_path’:
/usr/include/bits/dirent.h:33:10: note: subobject ‘d_name’ declared here
33 | char d_name[256]; /* We must not include limits.h! */
| ^~~~~~
In file included from /usr/include/string.h:495,
from util/parse-events.h:12,
from util/parse-events.c:18:
In function ‘strncpy’,
inlined from ‘tracepoint_id_to_path’ at util/parse-events.c:273:5:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ offset [275, 511] from the object at ‘evt_dirent’ is out of the bounds of referenced subobject ‘d_name’ with type ‘char[256]’ at offset 19 [-Werror=array-bounds]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/dirent.h:61,
from util/parse-events.c:5:
util/parse-events.c: In function ‘tracepoint_id_to_path’:
/usr/include/bits/dirent.h:33:10: note: subobject ‘d_name’ declared here
33 | char d_name[256]; /* We must not include limits.h! */
| ^~~~~~
CC /tmp/build/perf/util/call-path.o
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20200302145535.GA28183@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
ebcb9464a2 |
perf env: Do not return pointers to local variables
It is possible to return a pointer to a local variable when looking up the architecture name for the running system and no normalization is done on that value, i.e. we may end up returning the uts.machine local variable. While this doesn't happen on most arches, as normalization takes place, lets fix this by making that a static variable and optimize it a bit by not always running uname(), only the first time. Noticed in fedora rawhide running with: [perfbuilder@a5ff49d6e6e4 ~]$ gcc --version gcc (GCC) 10.0.1 20200216 (Red Hat 10.0.1-0.8) Reported-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ravi Bangoria
|
e0560ba6d9 |
perf annotate: Fix segfault with source toggle
While rendering annotate browser from perf report tui, we keep track of total number of lines(asm + source) in annotation->nr_entries and total number of asm lines in annotation->nr_asm_entries. But we don't reset them before starting. Thus if user annotates same function multiple times, we restart incrementing these fields with old values. This causes a segfault when user tries to toggle source code after annotating same function multiple times. Fix it. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Ian Rogers <irogers@google.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200204045233.474937-5-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ravi Bangoria
|
d3c03147bf |
perf annotate: Align struct annotate_args
Align fields of struct annotate_args. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Ian Rogers <irogers@google.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200204045233.474937-4-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ravi Bangoria
|
2316f861ae |
perf annotate: Simplify disasm_line allocation and freeing code
We are allocating disasm_line object in annotation_line__new() instead of disasm_line__new(). Similarly annotation_line__delete() is actually freeing disasm_line object as well. This complexity is because of privsize. But we don't need privsize anymore so get rid of privsize and simplify disasm_line allocation and freeing code. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Ian Rogers <irogers@google.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200204045233.474937-3-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ravi Bangoria
|
e0ad4d6854 |
perf annotate: Remove privsize from symbol__annotate() args
privsize is passed as 0 from all the symbol__annotate() callers. Remove it from argument list. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Ian Rogers <irogers@google.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200204045233.474937-2-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
He Zhe
|
bd862b1d83 |
perf probe: Check return value of strlist__add() for -ENOMEM
strlist__add() may fail with -ENOMEM. Check it and give debugging hint in advance. Signed-off-by: He Zhe <zhe.he@windriver.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/1582727404-180095-1-git-send-email-zhe.he@windriver.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ravi Bangoria
|
7384083ba6 |
perf annotate: Make perf config effective
perf default config set by user in [annotate] section is totally ignored
by annotate code. Fix it.
Before:
$ ./perf config
annotate.hide_src_code=true
annotate.show_nr_jumps=true
annotate.show_nr_samples=true
$ ./perf annotate shash
│ unsigned h = 0;
│ movl $0x0,-0xc(%rbp)
│ while (*s)
│ ↓ jmp 44
│ h = 65599 * h + *s++;
11.33 │24: mov -0xc(%rbp),%eax
43.50 │ imul $0x1003f,%eax,%ecx
│ mov -0x18(%rbp),%rax
After:
│ movl $0x0,-0xc(%rbp)
│ ↓ jmp 44
1 │1 24: mov -0xc(%rbp),%eax
4 │ imul $0x1003f,%eax,%ecx
│ mov -0x18(%rbp),%rax
Note that we have removed show_nr_samples and show_total_period from
annotation_options because they are not used. Instead of them we use
symbol_conf.show_nr_samples and symbol_conf.show_total_period.
Committer testing:
Using 'perf annotate --stdio2' to use the TUI rendering but emitting the output to stdio:
# perf config
#
# perf config annotate.hide_src_code=true
# perf config
annotate.hide_src_code=true
#
# perf config annotate.show_nr_jumps=true
# perf config annotate.show_nr_samples=true
# perf config
annotate.hide_src_code=true
annotate.show_nr_jumps=true
annotate.show_nr_samples=true
#
#
Before:
# perf annotate --stdio2 ObjectInstance::weak_pointer_was_finalized
Samples: 1 of event 'cycles', 4000 Hz, Event count (approx.): 830873, [percent: local period]
ObjectInstance::weak_pointer_was_finalized() /usr/lib64/libgjs.so.0.0.0
Percent
00000000000609f0 <ObjectInstance::weak_pointer_was_finalized()@@Base>:
endbr64
cmpq $0x0,0x20(%rdi)
↓ je 10
xor %eax,%eax
← retq
xchg %ax,%ax
100.00 10: push %rbp
cmpq $0x0,0x18(%rdi)
mov %rdi,%rbp
↓ jne 20
1b: xor %eax,%eax
pop %rbp
← retq
nop
20: lea 0x18(%rdi),%rdi
→ callq JS_UpdateWeakPointerAfterGC(JS::Heap<JSObject*
cmpq $0x0,0x18(%rbp)
↑ jne 1b
mov %rbp,%rdi
→ callq ObjectBase::jsobj_addr() const@plt
mov $0x1,%eax
pop %rbp
← retq
#
After:
# perf annotate --stdio2 ObjectInstance::weak_pointer_was_finalized 2> /dev/null
Samples: 1 of event 'cycles', 4000 Hz, Event count (approx.): 830873, [percent: local period]
ObjectInstance::weak_pointer_was_finalized() /usr/lib64/libgjs.so.0.0.0
Samples endbr64
cmpq $0x0,0x20(%rdi)
↓ je 10
xor %eax,%eax
← retq
xchg %ax,%ax
1 1 10: push %rbp
cmpq $0x0,0x18(%rdi)
mov %rdi,%rbp
↓ jne 20
1 1b: xor %eax,%eax
pop %rbp
← retq
nop
1 20: lea 0x18(%rdi),%rdi
→ callq JS_UpdateWeakPointerAfterGC(JS::Heap<JSObject*
cmpq $0x0,0x18(%rbp)
↑ jne 1b
mov %rbp,%rdi
→ callq ObjectBase::jsobj_addr() const@plt
mov $0x1,%eax
pop %rbp
← retq
#
# perf config annotate.show_nr_jumps
annotate.show_nr_jumps=true
# perf config annotate.show_nr_jumps=false
# perf config annotate.show_nr_jumps
annotate.show_nr_jumps=false
#
# perf annotate --stdio2 ObjectInstance::weak_pointer_was_finalized 2> /dev/null
Samples: 1 of event 'cycles', 4000 Hz, Event count (approx.): 830873, [percent: local period]
ObjectInstance::weak_pointer_was_finalized() /usr/lib64/libgjs.so.0.0.0
Samples endbr64
cmpq $0x0,0x20(%rdi)
↓ je 10
xor %eax,%eax
← retq
xchg %ax,%ax
1 10: push %rbp
cmpq $0x0,0x18(%rdi)
mov %rdi,%rbp
↓ jne 20
1b: xor %eax,%eax
pop %rbp
← retq
nop
20: lea 0x18(%rdi),%rdi
→ callq JS_UpdateWeakPointerAfterGC(JS::Heap<JSObject*
cmpq $0x0,0x18(%rbp)
↑ jne 1b
mov %rbp,%rdi
→ callq ObjectBase::jsobj_addr() const@plt
mov $0x1,%eax
pop %rbp
← retq
#
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yisheng Xie <xieyisheng1@huawei.com>
Link: http://lore.kernel.org/lkml/20200213064306.160480-6-ravi.bangoria@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ravi Bangoria
|
7b43b69704 |
perf config: Introduce perf_config_u8()
Introduce perf_config_u8() utility function to convert char * input into u8 destination. We will utilize it in followup patch. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Changbin Du <changbin.du@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Taeung Song <treeze.taeung@gmail.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Yisheng Xie <xieyisheng1@huawei.com> Link: http://lore.kernel.org/lkml/20200213064306.160480-5-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |