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42dfa451d8
Using gcc's ASan, Changbin reports:
=================================================================
==7494==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 48 byte(s) in 1 object(s) allocated from:
#0 0x7f0333a89138 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xee138)
#1 0x5625e5330a5e in zalloc util/util.h:23
#2 0x5625e5330a9b in perf_counts__new util/counts.c:10
#3 0x5625e5330ca0 in perf_evsel__alloc_counts util/counts.c:47
#4 0x5625e520d8e5 in __perf_evsel__read_on_cpu util/evsel.c:1505
#5 0x5625e517a985 in perf_evsel__read_on_cpu /home/work/linux/tools/perf/util/evsel.h:347
#6 0x5625e517ad1a in test__openat_syscall_event tests/openat-syscall.c:47
#7 0x5625e51528e6 in run_test tests/builtin-test.c:358
#8 0x5625e5152baf in test_and_print tests/builtin-test.c:388
#9 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
#10 0x5625e515572f in cmd_test tests/builtin-test.c:722
#11 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
#12 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
#13 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
#14 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
#15 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
Indirect leak of 72 byte(s) in 1 object(s) allocated from:
#0 0x7f0333a89138 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xee138)
#1 0x5625e532560d in zalloc util/util.h:23
#2 0x5625e532566b in xyarray__new util/xyarray.c:10
#3 0x5625e5330aba in perf_counts__new util/counts.c:15
#4 0x5625e5330ca0 in perf_evsel__alloc_counts util/counts.c:47
#5 0x5625e520d8e5 in __perf_evsel__read_on_cpu util/evsel.c:1505
#6 0x5625e517a985 in perf_evsel__read_on_cpu /home/work/linux/tools/perf/util/evsel.h:347
#7 0x5625e517ad1a in test__openat_syscall_event tests/openat-syscall.c:47
#8 0x5625e51528e6 in run_test tests/builtin-test.c:358
#9 0x5625e5152baf in test_and_print tests/builtin-test.c:388
#10 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
#11 0x5625e515572f in cmd_test tests/builtin-test.c:722
#12 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
#13 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
#14 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
#15 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
#16 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
His patch took care of evsel->prev_raw_counts, but the above backtraces
are about evsel->counts, so fix that instead.
Reported-by: Changbin Du <changbin.du@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lkml.kernel.org/n/tip-hd1x13g59f0nuhe4anxhsmfp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.