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b21cc97810
When a filename was found in addr2line it was duplicated via strdup() but never freed. Now we pass NULL and handle this gracefully in addr2line. Detected by Valgrind: ==16331== 1,680 bytes in 21 blocks are definitely lost in loss record 148 of 220 ==16331== at 0x4C2AF1F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==16331== by 0x672FA69: strdup (in /usr/lib/libc-2.25.so) ==16331== by 0x52769F: addr2line (srcline.c:256) ==16331== by 0x52769F: addr2inlines (srcline.c:294) ==16331== by 0x52769F: dso__parse_addr_inlines (srcline.c:502) ==16331== by 0x574D7A: inline__fprintf (hist.c:41) ==16331== by 0x574D7A: ipchain__fprintf_graph (hist.c:147) ==16331== by 0x57518A: __callchain__fprintf_graph (hist.c:212) ==16331== by 0x5753CF: callchain__fprintf_graph.constprop.6 (hist.c:337) ==16331== by 0x57738E: hist_entry__fprintf (hist.c:628) ==16331== by 0x57738E: hists__fprintf (hist.c:882) ==16331== by 0x44A20F: perf_evlist__tty_browse_hists (builtin-report.c:399) ==16331== by 0x44A20F: report__browse_hists (builtin-report.c:491) ==16331== by 0x44A20F: __cmd_report (builtin-report.c:624) ==16331== by 0x44A20F: cmd_report (builtin-report.c:1054) ==16331== by 0x4A49CE: run_builtin (perf.c:296) ==16331== by 0x4A4CC0: handle_internal_command (perf.c:348) ==16331== by 0x434371: run_argv (perf.c:392) ==16331== by 0x434371: main (perf.c:530) Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yao Jin <yao.jin@linux.intel.com> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170524062129.32529-3-namhyung@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.