derek.holloway
7502bf64a4
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95 lines
4.2 KiB
C++
95 lines
4.2 KiB
C++
// *** malloc: all bytes are uninitialized
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// * malloc byte 0
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 0 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 0 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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//
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// * malloc byte 6
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 6 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 6 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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//
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// This test assumes the allocator allocates 16 bytes for malloc(7). Bytes
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// 7-15 are padding.
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//
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// * malloc byte 7
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// Edge case: when the origin granularity spans both ALLOC and ALLOC_PADDING,
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// ALLOC always takes precedence.
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 7 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 7 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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//
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// Bytes 8-15 are padding
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// For track-origins=1, ALLOC is used instead of ALLOC_PADDING.
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//
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// * malloc byte 8
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 8 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 8 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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//
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// * malloc byte 15
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 15 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 15 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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// *** calloc
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// Bytes 0-6 are fully initialized, so no MSan report should happen.
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//
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// * calloc byte 0
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 -DUSE_CALLOC %s -o %t && %run %t 0 2>&1
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -DUSE_CALLOC %s -o %t && %run %t 0 2>&1
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//
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// * calloc byte 6
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 -DUSE_CALLOC %s -o %t && %run %t 6 2>&1
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -DUSE_CALLOC %s -o %t && %run %t 6 2>&1
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//
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// * calloc byte 7
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// Byte 7 is uninitialized. Unlike malloc, this is tagged as ALLOC_PADDING
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// (since the origin does not need to track bytes 4-6).
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 -DUSE_CALLOC %s -o %t && not %run %t 7 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -DUSE_CALLOC %s -o %t && not %run %t 7 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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//
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// * calloc byte 8
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 -DUSE_CALLOC %s -o %t && not %run %t 8 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -DUSE_CALLOC %s -o %t && not %run %t 8 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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//
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// * calloc byte 15
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// RUN: %clang_msan -fsanitize-memory-track-origins=1 -DUSE_CALLOC %s -o %t && not %run %t 15 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -DUSE_CALLOC %s -o %t && not %run %t 15 2>&1 \
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// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGIN-ALLOC-PADDING
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main(int argc, char **argv) {
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#ifdef USE_CALLOC
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char *p = (char *)calloc(7, 1);
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#else
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char *p = (char *)malloc(7);
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#endif
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if (argc == 2) {
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int index = atoi(argv[1]);
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printf("p[%d] = %d\n", index, p[index]);
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: {{#0 0x.* in main .*allocator_padding.cpp:}}[[@LINE-2]]
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// ORIGIN-ALLOC: Uninitialized value was created by a heap allocation
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// ORIGIN-ALLOC-PADDING: Uninitialized value is outside of heap allocation
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free(p);
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}
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return 0;
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}
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