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tracing: Move mcount section search to front of loop in recordmcount.pl 

Move the mcount section check to the beginning of the objdump read loop.
This makes the code easier to follow since the search for the mcount
section is performed first before the mcount callers are processed.

Signed-off-by: Li Hong <lihong.hi@gmail.com>
LKML-Reference: <20091028050523.GE30758@uhli>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Li Hong 2009-10-28 13:05:23 +08:00 committed by Steven Rostedt
parent 7b7edc2768
commit db24c7dcf4
1 changed files with 18 additions and 14 deletions
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32
scripts/recordmcount.pl
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@ -391,9 +391,27 @@ open(IN, "$objdump -hdr $inputfile|") || die "error running $objdump";
my $text;
# read headers first
my $read_headers = 1;
while (<IN>) {
if ($read_headers && /$mcount_section/) {
#
# Somehow the make process can execute this script on an
# object twice. If it does, we would duplicate the mcount
# section and it will cause the function tracer self test
# to fail. Check if the mcount section exists, and if it does,
# warn and exit.
#
print STDERR "ERROR: $mcount_section already in $inputfile\n" .
"\tThis may be an indication that your build is corrupted.\n" .
"\tDelete $inputfile and try again. If the same object file\n" .
"\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
exit(-1);
}
# is it a section?
if (/$section_regex/) {
$read_headers = 0;
@ -434,21 +452,7 @@ while (<IN>) {
$offset = hex $1;
}
}
} elsif ($read_headers && /$mcount_section/) {
#
# Somehow the make process can execute this script on an
# object twice. If it does, we would duplicate the mcount
# section and it will cause the function tracer self test
# to fail. Check if the mcount section exists, and if it does,
# warn and exit.
#
print STDERR "ERROR: $mcount_section already in $inputfile\n" .
"\tThis may be an indication that your build is corrupted.\n" .
"\tDelete $inputfile and try again. If the same object file\n" .
"\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
exit(-1);
}
# is this a call site to mcount? If so, record it to print later
if ($text_found && /$mcount_regex/) {
$offsets[$#offsets + 1] = hex $1;