89 lines
3.3 KiB
C++
89 lines
3.3 KiB
C++
// Test the behavior of malloc/calloc/realloc when the allocation causes OOM
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// in the secondary allocator.
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// By default (allocator_may_return_null=0) the process should crash.
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// With allocator_may_return_null=1 the allocator should return 0.
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// Set the limit to 20.5T on 64 bits to account for ASan shadow memory,
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// allocator buffers etc. so that the test allocation of ~1T will trigger OOM.
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// Limit this test to Linux since we're relying on allocator internal
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// limits (shadow memory size, allocation limits etc.)
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// RUN: %clangxx_asan -O0 %s -o %t
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// RUN: ulimit -v 22024290304
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// RUN: not %run %t malloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-CRASH
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// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-CRASH
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// RUN: %env_asan_opts=allocator_may_return_null=1 %run %t malloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-NULL
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// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-CALLOC,CHECK-CRASH
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// RUN: %env_asan_opts=allocator_may_return_null=1 %run %t calloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-CALLOC,CHECK-NULL
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// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-REALLOC,CHECK-CRASH
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// RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-REALLOC,CHECK-NULL
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// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC-REALLOC,CHECK-CRASH
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// RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC-REALLOC,CHECK-NULL
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// ASan shadow memory on s390 is too large for this test.
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// AArch64 bots fail on this test.
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// TODO(alekseys): Android lit do not run ulimit on device.
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// REQUIRES: shadow-scale-3
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// UNSUPPORTED: android, target={{(s390|aarch64|powerpc64le).*}}
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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int main(int argc, char **argv) {
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assert(argc == 2);
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const char *action = argv[1];
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fprintf(stderr, "%s:\n", action);
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// Allocate just a bit less than max allocation size enforced by ASan's
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// allocator (currently 1T and 3G).
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const size_t size =
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#if __LP64__
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(1ULL << 40) - (1ULL << 30);
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#else
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(3ULL << 30) - (1ULL << 20);
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#endif
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void *x = 0;
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if (!strcmp(action, "malloc")) {
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x = malloc(size);
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} else if (!strcmp(action, "calloc")) {
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x = calloc(size / 4, 4);
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} else if (!strcmp(action, "realloc")) {
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x = realloc(0, size);
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} else if (!strcmp(action, "realloc-after-malloc")) {
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char *t = (char*)malloc(100);
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*t = 42;
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x = realloc(t, size);
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assert(*t == 42);
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free(t);
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} else {
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assert(0);
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}
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// The NULL pointer is printed differently on different systems, while (long)0
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// is always the same.
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fprintf(stderr, "x: %lx\n", (long)x);
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free(x);
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return x != 0;
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}
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// CHECK-MALLOC: malloc:
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// CHECK-CALLOC: calloc:
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// CHECK-REALLOC: realloc:
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// CHECK-MALLOC-REALLOC: realloc-after-malloc:
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// CHECK-CRASH: SUMMARY: AddressSanitizer: out-of-memory
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// CHECK-NULL: x: 0
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