user/sven/linux.git/scripts/decode_stacktrace.sh, branch v5.16.18

scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path

2021-07-08T18:48:22Z

Add "auto" to the usage message so that it's a little clearer that you can pass "auto" as the second argument. When passing "auto" the script tries to find the base path automatically instead of requiring it be passed on the commandline. Also use [] to indicate the variable argument and that it is optional so that we can differentiate from the literal "auto" that should be passed. Link: https://lkml.kernel.org/r/20210511003845.2429846-11-swboyd@chromium.org Signed-off-by: Stephen Boyd Cc: Jiri Olsa Cc: Alexei Starovoitov Cc: Jessica Yu Cc: Evan Green Cc: Hsin-Yi Wang Cc: Konstantin Khlebnikov Cc: Sasha Levin Cc: Andy Shevchenko Cc: Baoquan He Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dave Young Cc: Ingo Molnar Cc: Matthew Wilcox Cc: Petr Mladek Cc: Rasmus Villemoes Cc: Sergey Senozhatsky Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Vivek Goyal Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: silence stderr messages from addr2line/nm

2021-07-08T18:48:22Z

Sometimes if you're using tools that have linked things improperly or have new features/sections that older tools don't expect you'll see warnings printed to stderr. We don't really care about these warnings, so let's just silence these messages to cleanup output of this script. Link: https://lkml.kernel.org/r/20210511003845.2429846-10-swboyd@chromium.org Signed-off-by: Stephen Boyd Cc: Jiri Olsa Cc: Alexei Starovoitov Cc: Jessica Yu Cc: Evan Green Cc: Hsin-Yi Wang Cc: Konstantin Khlebnikov Cc: Sasha Levin Cc: Andy Shevchenko Cc: Baoquan He Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dave Young Cc: Ingo Molnar Cc: Matthew Wilcox Cc: Petr Mladek Cc: Rasmus Villemoes Cc: Sergey Senozhatsky Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Vivek Goyal Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: support debuginfod

2021-07-08T18:48:22Z

Now that stacktraces contain the build ID information we can update this script to use debuginfod-find to locate the debuginfo for the vmlinux and modules automatically. This can replace the existing code that requires specifying a path to vmlinux or tries to find the vmlinux and modules automatically by using the release number. Work it into the script as a fallback option if the vmlinux isn't specified on the commandline. Link: https://lkml.kernel.org/r/20210511003845.2429846-9-swboyd@chromium.org Signed-off-by: Stephen Boyd Cc: Jiri Olsa Cc: Alexei Starovoitov Cc: Jessica Yu Cc: Evan Green Cc: Hsin-Yi Wang Cc: Konstantin Khlebnikov Cc: Sasha Levin Cc: Petr Mladek Cc: Steven Rostedt Cc: Andy Shevchenko Cc: Matthew Wilcox Cc: Baoquan He Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dave Young Cc: Ingo Molnar Cc: Rasmus Villemoes Cc: Sergey Senozhatsky Cc: Thomas Gleixner Cc: Vivek Goyal Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: guess path to vmlinux by release name

2020-08-07T18:33:21Z

Add option decode_stacktrace -r to specify only release name. This is enough to guess standard paths to vmlinux and modules: $ echo -e 'schedule+0x0/0x0 tap_open+0x0/0x0 [tap]' | ./scripts/decode_stacktrace.sh -r 5.4.0-37-generic schedule (kernel/sched/core.c:4138) tap_open (drivers/net/tap.c:502) tap Signed-off-by: Konstantin Khlebnikov Signed-off-by: Andrew Morton Cc: Sasha Levin Link: http://lkml.kernel.org/r/159282923334.248444.2399153100007347838.stgit@buzz Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: guess path to modules

2020-08-07T18:33:21Z

Try to find module in directory with vmlinux (for fresh build). Then try standard paths where debuginfo are usually placed. Pick first file which have elf section '.debug_line'. Before: $ echo 'tap_open+0x0/0x0 [tap]' | ./scripts/decode_stacktrace.sh /usr/lib/debug/boot/vmlinux-5.4.0-37-generic WARNING! Modules path isn't set, but is needed to parse this symbol tap_open+0x0/0x0 tap After: $ echo 'tap_open+0x0/0x0 [tap]' | ./scripts/decode_stacktrace.sh /usr/lib/debug/boot/vmlinux-5.4.0-37-generic tap_open (drivers/net/tap.c:502) tap Signed-off-by: Konstantin Khlebnikov Signed-off-by: Andrew Morton Cc: Sasha Levin Link: http://lkml.kernel.org/r/159282923068.248444.5461337458421616083.stgit@buzz Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: guess basepath if not specified

2020-08-07T18:33:21Z

Guess path to kernel sources using known location of symbol "kernel_init". Make basepath argument optional. Before: $ echo 'vfs_open+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux "" vfs_open (home/khlebnikov/src/linux/fs/open.c:912) After: $ echo 'vfs_open+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux vfs_open (fs/open.c:912) Signed-off-by: Konstantin Khlebnikov Signed-off-by: Andrew Morton Cc: Sasha Levin Link: http://lkml.kernel.org/r/159282922803.248444.2379229451667913634.stgit@buzz Signed-off-by: Linus Torvalds

scripts/decode_stacktrace.sh: skip missing symbols

2020-08-07T18:33:21Z

For now script turns missing symbols into '0' and make bogus decode. Skip them instead. Also simplify parsing output of 'nm'. Before: $ echo 'xxx+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux "" xxx (home/khlebnikov/src/linux/./arch/x86/include/asm/processor.h:398) After: $ echo 'xxx+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux "" xxx+0x0/0x0 Signed-off-by: Konstantin Khlebnikov Signed-off-by: Andrew Morton Cc: Sasha Levin Link: http://lkml.kernel.org/r/159282922499.248444.4883465570858385250.stgit@buzz Signed-off-by: Linus Torvalds

scripts/decode_stacktrace: strip basepath from all paths

2020-07-24T19:42:42Z

Currently the basepath is removed only from the beginning of the string. When the symbol is inlined and there's multiple line outputs of addr2line, only the first line would have basepath removed. Change to remove the basepath prefix from all lines. Fixes: 31013836a71e ("scripts/decode_stacktrace: match basepath using shell prefix operator, not regex") Co-developed-by: Shik Chen Signed-off-by: Pi-Hsun Shih Signed-off-by: Shik Chen Signed-off-by: Andrew Morton Reviewed-by: Stephen Boyd Cc: Sasha Levin Cc: Nicolas Boichat Cc: Jiri Slaby Link: http://lkml.kernel.org/r/20200720082709.252805-1-pihsun@chromium.org Signed-off-by: Linus Torvalds

scripts/decode_stacktrace: warn when modpath is needed but is unset

2020-06-15T22:37:24Z

When a user tries to parse a symbol located inside a module he must have modpath set. Otherwise, decode_stacktrace won't be able to parse the symbol correctly. Right now the failure is silent and easily missed by the user. What's worse is that by the time the user realizes what happened (or someone on LKML asks him to add the modpath and re-run), he might have already got rid of the vmlinux/modules. Signed-off-by: Sasha Levin Signed-off-by: Linus Torvalds

scripts/decode_stacktrace: Accept dash/underscore in modules

2019-07-12T18:05:41Z

The manpage for modprobe mentions that dashes and underscores are treated interchangeably in module names. The stack trace dumps seem to print module names with underscores. Use bash to replace _ with the pattern [-_] so that file names with dashes or underscores can be found. For example, this line: [ 27.919759] hda_widget_sysfs_init+0x2b8/0x3a5 [snd_hda_core] should find a module named snd-hda-core.ko. Link: http://lkml.kernel.org/r/20190531205926.42474-1-evgreen@chromium.org Signed-off-by: Evan Green Reviewed-by: Douglas Anderson Acked-by: Konstantin Khlebnikov Cc: Stephen Rothwell Cc: Douglas Anderson Cc: Evan Green Cc: Nicolas Boichat Cc: Marc Zyngier Cc: Manuel Traut Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds