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| author | Evan Green <evgreen@chromium.org> | 2019-08-01 16:04:42 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-10-05 00:47:33 +0000 |
| commit | a41fea6b7df1c83072140c0da9e07f09a8b032e4 (patch) | |
| tree | 283880db1385c93420de304b410a3bccafa90971 /include/printf.h | |
| parent | 4a29d2ecf4392cb995548e8f174cc85bac8361c1 (diff) | |
| download | chrome-ec-a41fea6b7df1c83072140c0da9e07f09a8b032e4.tar.gz | |
printf: Fix up %p to %pP
In order to avoid landmines later with future extensions to %p,
disallow %p by itself. The danger is that we'll have something
like: printf("%pFOO", myptr), and then later will add a %pF
extension, but miss this printf (maybe the string is split, maybe
it's just missed).
Missing a conversion during extension is worse than just seeing a
print like <ptr_val>OO, since %pF likely reaches through the
pointer and interprets its contents according to whatever F means.
Convert existing uses of %p to %pP, so they're explicitly printing
a pointer value, giving us flexibility to extend in the future.
BUG=chromium:984041
TEST=make -j buildall
BRANCH=None
Cq-Depend:chrome-internal:1560879
Change-Id: I36a4bee8d41cb9a6139171f8de0d8f2f19468132
Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1730604
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Diffstat (limited to 'include/printf.h')
| -rw-r--r-- | include/printf.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/printf.h b/include/printf.h index ea1445a526..6162e98bd2 100644 --- a/include/printf.h +++ b/include/printf.h @@ -42,7 +42,8 @@ * - 's' - null-terminated ASCII string * - 'h' - binary data, print as hex; precision is length of data in bytes. * So "%.8h" prints 8 bytes of binary data - * - 'p' - pointer + * - 'pP'- raw pointer. %p followed by another character represents a %p + * extension. * - 'd' - signed integer * - 'i' - signed integer if CONFIG_PRINTF_LEGACY_LI_FORMAT is set (ignore l) * - 'u' - unsigned integer |