On 10/25/18 10:55 AM, Florian Fainelli wrote: > Hi all, > > I just painfully learned that perf would segfault when > CONFIG_KUSER_HELPERS is disabled because it unconditionally makes use of > it. This patch series adds an ARM test for that by leveraging the > existing find_vdso_map() function and making it more generic and capable > of location any map within /proc/self/maps.
Did not get much feedback, you are all probably busy attending LPC conferences, but I was wondering if this did make sense or if there is a better approach that should be looked at? I am starting to see additional tests failing that require some ARM (32-bit) specific changes, and not accumulating too many of these fixes on top of that series would be neat. Thank you! > > Changes in v2: > > - use strlen() instead of sizeof() -1 since we made the page name a > parameter > - use TEST_OK/TEST_FAIL in lieu of 0/-1 > - added an error message indicating CONFIG_KUSER_HELPERS might be > disabled > > Florian Fainelli (2): > perf tools: Make find_vdso_map() more modular > perf tests: Add a test for the ARM 32-bit [vectors] page > > tools/perf/arch/arm/tests/Build | 1 + > tools/perf/arch/arm/tests/arch-tests.c | 4 +++ > tools/perf/arch/arm/tests/vectors-page.c | 24 ++++++++++++++++++ > tools/perf/tests/tests.h | 5 ++++ > tools/perf/util/find-map.c | 31 ++++++++++++++++++++++++ > tools/perf/util/find-vdso-map.c | 30 +++-------------------- > 6 files changed, 68 insertions(+), 27 deletions(-) > create mode 100644 tools/perf/arch/arm/tests/vectors-page.c > create mode 100644 tools/perf/util/find-map.c > -- Florian