kernel/linux.git/tools/perf/util/srcline.c, branch v6.4

perf srcline: Avoid addr2line SIGPIPEs

2023-04-04T16:23:59+00:00

Ignore SIGPIPEs when addr2line is configured. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Tom Rix Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230403184033.1836023-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Support for llvm-addr2line

2023-04-04T16:23:59+00:00

The sentinel value differs for llvm-addr2line. Configure this once and then detect when reading records. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Tom Rix Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230403184033.1836023-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Simplify addr2line subprocess

2023-04-04T16:23:59+00:00

Don't wrap stdin and stdout of subprocess with streams, use the api/io library for buffering. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Tom Rix Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230403184033.1836023-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf symbol: Add command line support for addr2line path

2023-04-04T12:39:56+00:00

Allow addr2line to be set either on the command line or via the perfconfig file. This doesn't currently work with llvm-addr2line as the addr2line code emits two things: 1) the address to decode, 2) a bogus ',' value. The expectation is the bogus value will generate: ?? ??:0 that terminates the addr2line reading. However, the output from llvm-addr2line is a single line with just the input ',' locking up the addr2line reading that is expecting a second line. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andres Freund Cc: German Gomez Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Sandipan Das Cc: Tom Rix Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230328235543.1082207-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Conditionally suppress addr2line warnings

2022-12-21T17:52:40+00:00

It has symbol_conf.disable_add2line_warn to suppress some warnings. Let's make it consistent with others. Signed-off-by: Namhyung Kim Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andi Kleen Cc: Ingo Molnar Cc: Jiri Olsa Cc: Leo Yan Cc: Milian Wolff Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20221215192817.2734573-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Skip srcline if .debug_line is missing

2022-12-21T17:52:40+00:00

The srcline info is from the .debug_line section. No need to setup addr2line subprocess if the section is missing. Signed-off-by: Namhyung Kim Acked-by: Ian Rogers Link: https://lore.kernel.org/r/20221215192817.2734573-5-namhyung@kernel.org Cc: Peter Zijlstra Cc: Adrian Hunter Cc: Milian Wolff Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Ingo Molnar Cc: Leo Yan Cc: Andi Kleen Cc: LKML Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Do not return NULL for srcline

2022-12-21T17:52:40+00:00

The code assumes non-NULL srcline value always, let's return the usual SRCLINE_UNKNOWN ("??:0") string instead. Signed-off-by: Namhyung Kim Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andi Kleen Cc: Ingo Molnar Cc: Jiri Olsa Cc: Leo Yan Cc: Milian Wolff Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20221215192817.2734573-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf srcline: Use long-running addr2line per DSO

2021-10-04T12:29:07+00:00

Invoking addr2line in a separate subprocess, one for each required lookup, takes a terribly long time. This patch introduces a long-running addr2line process for each DSO, *DRAMATICALLY* speeding up runs of perf. What used to take tens of minutes now takes tens of seconds. Debian bug report about this issue: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911815 Signed-off-by: Tony Garnock-Jones Tested-by: Ian Rogers Cc: Ingo Molnar Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210916120939.453536-1-tonyg@leastfixedpoint.com Signed-off-by: Arnaldo Carvalho de Melo

perf: Make perf able to build with latest libbfd

2020-01-30T10:55:26+00:00

libbfd has changed the bfd_section_* macros to inline functions bfd_section_ since 2019-09-18. See below two commits: o http://www.sourceware.org/ml/gdb-cvs/2019-09/msg00064.html o https://www.sourceware.org/ml/gdb-cvs/2019-09/msg00072.html This fix make perf able to build with both old and new libbfd. Signed-off-by: Changbin Du Acked-by: Jiri Olsa Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200128152938.31413-1-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

tools lib: Adopt zalloc()/zfree() from tools/perf

2019-07-09T13:13:26+00:00

Eroding a bit more the tools/perf/util/util.h hodpodge header. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-natazosyn9rwjka25tvcnyi0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo