Re: [libvirt] [PATCH v3] bitmap: fix typo to use UL type of integer constant in virBitmapIsAllSet

This bug leads to getting incorrect vcpupin information via qemudDomainGetVcpuPinInfo() API when the number of maximum cpu on a host falls into a range such as 31 < ncpus < 64. gcc warning: left shift count >= width of type The following bug is such the case https://bugzilla.redhat.com/show_bug.cgi?id=876415 --- src/util/bitmap.c | 4 ++-- tests/virbitmaptest.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 2 deletions(-) diff --git a/src/util/bitmap.c b/src/util/bitmap.c index 5ec5440..c29f5f3 100644 --- a/src/util/bitmap.c +++ b/src/util/bitmap.c @@ -574,8 +574,8 @@ bool virBitmapIsAllSet(virBitmapPtr bitmap) return false; if (unusedBits > 0) { - if ((bitmap->map[sz] & ((1U << (VIR_BITMAP_BITS_PER_UNIT - unusedBits)) - 1)) - != ((1U << (VIR_BITMAP_BITS_PER_UNIT - unusedBits)) - 1)) + if ((bitmap->map[sz] & ((1UL << (VIR_BITMAP_BITS_PER_UNIT - unusedBits)) - 1)) + != ((1UL << (VIR_BITMAP_BITS_PER_UNIT - unusedBits)) - 1)) return false; } diff --git a/tests/virbitmaptest.c b/tests/virbitmaptest.c index f1eb9d5..af94dab 100644 --- a/tests/virbitmaptest.c +++ b/tests/virbitmaptest.c @@ -347,6 +347,41 @@ error: return ret; } +static int test7(const void *v ATTRIBUTE_UNUSED) +{ + virBitmapPtr bitmap; + size_t i; + size_t maxBit[] = { + 1, 8, 31, 32, 63, 64, 95, 96, 127, 128, 159, 160 + }; + size_t nmaxBit = 12; + + for (i = 0; i < nmaxBit; i++) { + bitmap = virBitmapNew(maxBit[i]); + if (!bitmap) + goto error; + + if (virBitmapIsAllSet(bitmap)) + goto error; + + ignore_value(virBitmapSetBit(bitmap, 1)); + if (virBitmapIsAllSet(bitmap)) + goto error; + + virBitmapSetAll(bitmap); + if (!virBitmapIsAllSet(bitmap)) + goto error; + + virBitmapFree(bitmap); + } + + return 0; + +error: + virBitmapFree(bitmap); + return -1; +} + static int mymain(void) { @@ -364,6 +399,8 @@ mymain(void) ret = -1; if (virtTestRun("test6", 1, test6, NULL) < 0) ret = -1; + if (virtTestRun("test7", 1, test7, NULL) < 0) + ret = -1; return ret;