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leaking_addresses: cache architecture name

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Currently we are repeatedly calling `uname -m`.  This is causing the
script to take a long time to run (more than 10 seconds to parse
/proc/kallsyms).  We can use Perl state variables to cache the result of
the first call to `uname -m`.  With this change in place the script
scans the whole kernel in under a minute.

Cache machine architecture in state variable.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
This commit is contained in:
Tobin C. Harding 2018-02-19 13:23:44 +11:00
parent b401f56f33
commit 5e4bac34ed
1 changed files with 5 additions and 3 deletions
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8
scripts/leaking_addresses.pl
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@ -175,7 +175,7 @@ sub is_32bit
sub is_ix86_32 sub is_ix86_32
{ {
my $arch = `uname -m`; state $arch = `uname -m`;
chomp $arch; chomp $arch;
if ($arch =~ m/i[3456]86/) { if ($arch =~ m/i[3456]86/) {
@ -198,12 +198,14 @@ sub is_arch
sub is_x86_64 sub is_x86_64
{ {
return is_arch('x86_64'); state $is = is_arch('x86_64');
return $is;
} }
sub is_ppc64 sub is_ppc64
{ {
return is_arch('ppc64'); state $is = is_arch('ppc64');
return $is;
} }
# Gets config option value from kernel config file. # Gets config option value from kernel config file.