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scripts: decode_stacktrace: fix ARM architecture decoding

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Fix the stack decoder for the ARM architecture.
An ARM stack is designed as :

[   81.547704] [<c023eb04>] (bucket_find_contain) from [<c023ec88>] (check_sync+0x40/0x4f8)
[   81.559668] [<c023ec88>] (check_sync) from [<c023f8c4>] (debug_dma_sync_sg_for_cpu+0x128/0x194)
[   81.571583] [<c023f8c4>] (debug_dma_sync_sg_for_cpu) from [<c0327dec>] (__videobuf_s

The current script doesn't expect the symbols to be bound by
parenthesis, and triggers the following errors :

  awk: cmd. line:1: error: Unmatched ( or \(: / (check_sync$/
  [   81.547704] (bucket_find_contain) from (check_sync+0x40/0x4f8)

Fix it by chopping starting and ending parenthesis from the each symbol
name.

As a side note, this probably comes from the function
dump_backtrace_entry(), which is implemented differently for each
architecture.  That makes a single decoding script a bit a challenge.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Robert Jarzmik 2015-09-04 15:43:26 -07:00 committed by Linus Torvalds
parent fa70900e09
commit e260fe01fa
1 changed files with 4 additions and 1 deletions
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5
scripts/decode_stacktrace.sh
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@ -14,11 +14,14 @@ declare -A cache
parse_symbol() {
# The structure of symbol at this point is:
# [name]+[offset]/[total length]
# ([name]+[offset]/[total length])
#
# For example:
# do_basic_setup+0x9c/0xbf
# Remove the englobing parenthesis
symbol=${symbol#\(}
symbol=${symbol%\)}
# Strip the symbol name so that we could look it up
local name=${symbol%+*}