user/sven/linux.git/tools/perf/util/string.c, branch v4.14.187

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02T10:10:55Z

Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

perf tools: Move extra string util functions to util/string2.h

2017-04-19T16:01:51Z

Moving them from util.h, where they don't belong. Since libc already have string.h, name it slightly differently, as string2.h. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-eh3vz5sqxsrdd8lodoro4jrw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move sane ctype stuff from util.h to sane_ctype.h

2017-04-19T16:01:48Z

More stuff that came from git, out of the hodge-podge that is util.h Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-e3lana4gctz3ub4hn4y29hkw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf string: Simplify ltrim() implementation

2017-04-11T18:23:39Z

We don't need to use strlen(), a var, or check for the end explicitely, isspace('\0') is false: [acme@jouet c]$ cat ltrim.c #include #include static char *ltrim(char *s) { while (isspace(*s)) ++s; return s; } int main(void) { printf("ltrim(\"\")='%s'\n", ltrim("")); return 0; } [acme@jouet c]$ ./ltrim ltrim("")='' [acme@jouet c]$ Cc: Jiri Olsa Cc: Namhyung Kim Cc: Taeung Song Link: http://lkml.kernel.org/n/tip-w3nk0x3pai2vojk2ab6kdvaw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools string: Use __fallthrough in perf_atoll()

2017-02-08T20:31:01Z

The implicit fall through case label here is intended, so let us inform that to gcc >= 7: CC /tmp/build/perf/util/string.o util/string.c: In function 'perf_atoll': util/string.c:22:7: error: this statement may fall through [-Werror=implicit-fallthrough=] if (*p) ^ util/string.c:24:3: note: here case '\0': ^~~~ Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-0ophb30v9apkk6o95el0rqlq@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf list: Make vendor event matching case insensitive

2016-10-24T14:07:46Z

Make the 'perf list' glob matching for vendor events case insensitive. This allows to use the upper case vendor events with perf list too. Now the following works: % perf list LONGEST_LAT ... cache: longest_lat_cache.miss [Core-originated cacheable demand requests missed LLC] longest_lat_cache.reference [Core-originated cacheable demand requests that refer to LLC] Signed-off-by: Andi Kleen Suggested-by: Ingo Molnar Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1476899402-31460-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo

tools: Adopt memdup() from tools/perf, moving it to tools/lib/string.c

2015-11-18T20:51:02Z

That will contain more string functions with counterparts, sometimes verbatim copies, in the kernel. Acked-by: Wang Nan Cc: Adrian Hunter Cc: Alexey Dobriyan Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/n/tip-rah6g97kn21vfgmlramorz6o@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Asprintf like functions to format integer filter expression

2015-07-06T13:21:46Z

char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints); char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints); Example of output formatted with those functions: # ./tp_filter 6 12 2015 asprintf_expr_in_ints: id == 6 || id == 12 || id == 2015 asprintf_expr_not_in_ints: id != 6 && id != 12 && id != 2015 # It'll be used with, for instance, perf_evsel__set_filter_in_ints(), that will be used in turn to ask the kernel to filter out all raw_syscalls:* except for the ones specified by the user via: $ perf trace -e some,list,of,syscalls Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-jt07vfp6bd8y50c05j1t7hrn@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

Revert "perf tools: Default to cpu// for events v5"

2014-10-15T19:04:33Z

This reverts commit 50e200f07948 ("perf tools: Default to cpu// for events v5") The fixup cannot handle the case that new style format(which without //) mixed with other different formats. For example, group events with new style format: {mem-stores,mem-loads} some hardware event + new style event: cycles,mem-loads Cache event + new style event: LLC-loads,mem-loads Raw event + new style event: cpu/event=0xc8,umask=0x08/,mem-loads old style event and new stytle mixture: mem-stores,cpu/mem-loads/ Signed-off-by: Kan Liang Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1412694532-23391-2-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo

saner perf_atoll()

2014-10-09T06:39:10Z

That loop in there is both anti-idiomatic *and* completely pointless. strtoll() is there for purpose; use it and compare what's left with acceptable suffices. Signed-off-by: Al Viro