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// RUN: %clang_scudo %s -o %t
// RUN: SCUDO_OPTIONS="QuarantineSizeMb=1:QuarantineSizeKb=64" not %run %t unused 2>&1
// RUN: SCUDO_OPTIONS="QuarantineSizeMb=1:QuarantineChunksUpToSize=256" not %run %t unused 2>&1
// RUN: SCUDO_OPTIONS="QuarantineSizeKb=0:ThreadLocalQuarantineSizeKb=0" %run %t zeroquarantine 2>&1
// RUN: SCUDO_OPTIONS=QuarantineSizeKb=64 %run %t smallquarantine 2>&1
// RUN: SCUDO_OPTIONS=QuarantineChunksUpToSize=256 %run %t threshold 2>&1
// RUN: SCUDO_OPTIONS="QuarantineSizeMb=1" %run %t oldquarantine 2>&1
// Tests that the quarantine prevents a chunk from being reused right away.
// Also tests that a chunk will eventually become available again for
// allocation when the recycling criteria has been met. Finally, tests the
// threshold up to which a chunk is quarantine, and the old quarantine behavior.
#include <assert.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
#include <sanitizer/allocator_interface.h>
int main(int argc, char **argv)
{
void *p, *old_p;
size_t allocated_bytes, size = 1U << 8, alignment = 1U << 8;
assert(argc == 2);
// First, warm up the allocator for the classes used.
p = malloc(size);
assert(p);
free(p);
p = malloc(size + 1);
assert(p);
free(p);
assert(posix_memalign(&p, alignment, size) == 0);
assert(p);
free(p);
assert(posix_memalign(&p, alignment, size + 1) == 0);
assert(p);
free(p);
if (!strcmp(argv[1], "zeroquarantine")) {
// Verifies that a chunk is deallocated right away when the local and
// global quarantine sizes are 0.
allocated_bytes = __sanitizer_get_current_allocated_bytes();
p = malloc(size);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() == allocated_bytes);
}
if (!strcmp(argv[1], "smallquarantine")) {
// The delayed freelist will prevent a chunk from being available right
// away.
p = malloc(size);
assert(p);
old_p = p;
free(p);
p = malloc(size);
assert(p);
assert(old_p != p);
free(p);
// Eventually the chunk should become available again.
bool found = false;
for (int i = 0; i < 0x200 && !found; i++) {
p = malloc(size);
assert(p);
found = (p == old_p);
free(p);
}
assert(found);
}
if (!strcmp(argv[1], "threshold")) {
// Verifies that a chunk of size greater than the threshold will be freed
// right away. Alignment has no impact on the threshold.
allocated_bytes = __sanitizer_get_current_allocated_bytes();
p = malloc(size + 1);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() == allocated_bytes);
assert(posix_memalign(&p, alignment, size + 1) == 0);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() == allocated_bytes);
// Verifies that a chunk of size lower or equal to the threshold will be
// quarantined.
p = malloc(size);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
allocated_bytes = __sanitizer_get_current_allocated_bytes();
assert(posix_memalign(&p, alignment, size) == 0);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
}
if (!strcmp(argv[1], "oldquarantine")) {
// Verifies that we quarantine everything if the deprecated quarantine
// option is specified. Alignment has no impact on the threshold.
allocated_bytes = __sanitizer_get_current_allocated_bytes();
p = malloc(size);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
allocated_bytes = __sanitizer_get_current_allocated_bytes();
assert(posix_memalign(&p, alignment, size) == 0);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
// Secondary backed allocation.
allocated_bytes = __sanitizer_get_current_allocated_bytes();
p = malloc(1U << 19);
assert(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
free(p);
assert(__sanitizer_get_current_allocated_bytes() > allocated_bytes);
}
return 0;
}
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