linux.git/tools/perf/tests/demangle-java-test.c, branch v6.18.21

perf test demangle-java: Don't segv if demangling fails

2025-05-28T13:12:47+00:00

The buffer returned by dso__demangle_sym() may be NULL, don't segv in
strcmp if this happens.

Currently this happens for NO_LIBELF=1 builds.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alex Gaynor 
Cc: Alexander Shishkin 
Cc: Alice Ryhl 
Cc: Andi Kleen 
Cc: Andreas Hindborg 
Cc: Benno Lossin 
Cc: Björn Roy Baron 
Cc: Boqun Feng 
Cc: Danilo Krummrich 
Cc: Dmitriy Vyukov 
Cc: Gary Guo 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiapeng Chong 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Miguel Ojeda 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephen Brennan 
Cc: Trevor Gross 
Cc: Weilin Wang 
Link: https://lore.kernel.org/r/20250528032637.198960-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test demangle-java: Switch to using dso__demangle_sym()

2025-05-09T20:02:23+00:00

The use of the demangle-java APIs means we don't detect if a different
demangler is used before the Java one for the case that matters to
perf.

Remove the return types from the demangled names as dso__demangle_sym()
removes those.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alex Gaynor 
Cc: Alexander Shishkin 
Cc: Alice Ryhl 
Cc: Andreas Hindborg 
Cc: Ariel Ben-Yehuda 
Cc: Benno Lossin 
Cc: Bill Wendling 
Cc: Björn Roy Baron 
Cc: Boqun Feng 
Cc: Daniel Xu 
Cc: Danilo Krummrich 
Cc: Gary Guo 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiapeng Chong 
Cc: Jiri Olsa 
Cc: Justin Stitt 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Masami Hiramatsu 
Cc: Miguel Ojeda 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: Nick Desaulniers 
Cc: Peter Zijlstra 
Cc: Ravi Bangoria 
Cc: Stephen Brennan 
Cc: Trevor Gross 
Link: https://lore.kernel.org/r/20250430004128.474388-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Use ARRAY_SIZE for array length

2024-09-30T19:59:42+00:00

Use of macro ARRAY_SIZE to calculate array size minimizes
the redundant code and improves code reusability.

  ./tools/perf/tests/demangle-java-test.c:31:34-35: WARNING: Use ARRAY_SIZE.

Reported-by: Abaci Robot 
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=11173
Signed-off-by: Jiapeng Chong 
Link: https://lore.kernel.org/r/20240929093045.10136-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Namhyung Kim

perf test: Rename struct test to test_suite

2021-11-13T13:32:22+00:00

This is to align with kunit's terminology.

Signed-off-by: Ian Rogers 
Tested-by: Sohaib Mohamed 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Brendan Higgins 
Cc: Daniel Latypov 
Cc: David Gow 
Cc: Ingo Molnar 
Cc: Jin Yao 
Cc: John Garry 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Paul Clarke 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: https://lore.kernel.org/r/20211104064208.3156807-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Move each test suite struct to its test

2021-11-13T13:30:58+00:00

Rather than export test functions, export the test struct. Rename with a
suite__ prefix to avoid name collisions.

Committer notes:

Its '&suite__vectors_page', not '&suite__vectors_pages', noticed when
cross building to arm (32-bit).

Signed-off-by: Ian Rogers 
Tested-by: Sohaib Mohamed 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Brendan Higgins 
Cc: Daniel Latypov 
Cc: David Gow 
Cc: Ingo Molnar 
Cc: Jin Yao 
Cc: John Garry 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Paul Clarke 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: https://lore.kernel.org/r/20211104064208.3156807-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Add test for the java demangler

2020-05-28T13:03:28+00:00

Split from a larger patch that was also fixing a problem with the java
demangler, so, before applying that patch we see:

  $ perf test java
  65: Demangle Java                                         : FAILED!
  $ perf test -v java
  65: Demangle Java                                         :
  --- start ---
  test child forked, pid 307264
  FAILED: Ljava/lang/StringLatin1;equals([B[B)Z: bool class java.lang.StringLatin1.equals(byte[], byte[]) != boolean java.lang.StringLatin1.equals(byte[], byte[])
  FAILED: Ljava/util/zip/ZipUtils;CENSIZ([BI)J: long class java.util.zip.ZipUtils.CENSIZ(byte[], int) != long java.util.zip.ZipUtils.CENSIZ(byte[], int)
  FAILED: Ljava/util/regex/Pattern$BmpCharProperty;match(Ljava/util/regex/Matcher;ILjava/lang/CharSequence;)Z: bool class java.util.regex.Pattern$BmpCharProperty.match(class java.util.regex.Matcher., int, class java.lang., charhar, shortequence) != boolean java.util.regex.Pattern$BmpCharProperty.match(java.util.regex.Matcher, int, java.lang.CharSequence)
  FAILED: Ljava/lang/AbstractStringBuilder;appendChars(Ljava/lang/String;II)V: void class java.lang.AbstractStringBuilder.appendChars(class java.lang., shorttring., int, int) != void java.lang.AbstractStringBuilder.appendChars(java.lang.String, int, int)
  FAILED: Ljava/lang/Object;()V: void class java.lang.Object() != void java.lang.Object()
  test child finished with -1
  ---- end ----
  Demangle Java: FAILED!
  $

Next patch should fix this.

Signed-off-by: Nick Gasson 
Reviewed-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Tested-by: Ian Rogers 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lore.kernel.org/lkml/20200427061520.24905-4-nick.gasson@arm.com
Signed-off-by: Arnaldo Carvalho de Melo