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//===-- sanitizer_scanf_interceptor_test.cc -------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Tests for *scanf interceptors implementation in sanitizer_common.
//
//===----------------------------------------------------------------------===//
#include <vector>
#include "interception/interception.h"
#include "sanitizer_test_utils.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "gtest/gtest.h"
using namespace __sanitizer;
#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
((std::vector<unsigned> *)ctx)->push_back(size)
#include "sanitizer_common/sanitizer_common_interceptors_scanf.inc"
static const char scanf_buf[] = "Test string.";
static size_t scanf_buf_size = sizeof(scanf_buf);
static const unsigned SCANF_ARGS_MAX = 16;
static void testScanf3(void *ctx, int result, bool allowGnuMalloc,
const char *format, ...) {
va_list ap;
va_start(ap, format);
scanf_common(ctx, result, allowGnuMalloc, format, ap);
va_end(ap);
}
static void testScanf2(const char *format, int scanf_result,
bool allowGnuMalloc, unsigned n,
va_list expected_sizes) {
std::vector<unsigned> scanf_sizes;
// 16 args should be enough.
testScanf3((void *)&scanf_sizes, scanf_result, allowGnuMalloc, format,
scanf_buf, scanf_buf, scanf_buf, scanf_buf, scanf_buf, scanf_buf,
scanf_buf, scanf_buf, scanf_buf, scanf_buf, scanf_buf, scanf_buf,
scanf_buf, scanf_buf, scanf_buf, scanf_buf);
ASSERT_EQ(n, scanf_sizes.size()) << "Unexpected number of format arguments: '"
<< format << "'";
for (unsigned i = 0; i < n; ++i)
EXPECT_EQ(va_arg(expected_sizes, unsigned), scanf_sizes[i])
<< "Unexpect write size for argument " << i << ", format string '"
<< format << "'";
}
static void testScanf(const char *format, unsigned n, ...) {
va_list ap;
va_start(ap, n);
testScanf2(format, SCANF_ARGS_MAX, /* allowGnuMalloc */ true, n, ap);
va_end(ap);
}
static void testScanfPartial(const char *format, int scanf_result, unsigned n,
...) {
va_list ap;
va_start(ap, n);
testScanf2(format, scanf_result, /* allowGnuMalloc */ true, n, ap);
va_end(ap);
}
static void testScanfNoGnuMalloc(const char *format, unsigned n, ...) {
va_list ap;
va_start(ap, n);
testScanf2(format, SCANF_ARGS_MAX, /* allowGnuMalloc */ false, n, ap);
va_end(ap);
}
TEST(SanitizerCommonInterceptors, Scanf) {
const unsigned I = sizeof(int); // NOLINT
const unsigned L = sizeof(long); // NOLINT
const unsigned LL = sizeof(long long); // NOLINT
const unsigned S = sizeof(short); // NOLINT
const unsigned C = sizeof(char); // NOLINT
const unsigned D = sizeof(double); // NOLINT
const unsigned LD = sizeof(long double); // NOLINT
const unsigned F = sizeof(float); // NOLINT
const unsigned P = sizeof(char *); // NOLINT
testScanf("%d", 1, I);
testScanf("%d%d%d", 3, I, I, I);
testScanf("ab%u%dc", 2, I, I);
testScanf("%ld", 1, L);
testScanf("%llu", 1, LL);
testScanf("a %hd%hhx", 2, S, C);
testScanf("%c", 1, C);
testScanf("%%", 0);
testScanf("a%%", 0);
testScanf("a%%b", 0);
testScanf("a%%%%b", 0);
testScanf("a%%b%%", 0);
testScanf("a%%%%%%b", 0);
testScanf("a%%%%%b", 0);
testScanf("a%%%%%f", 1, F);
testScanf("a%%%lxb", 1, L);
testScanf("a%lf%%%lxb", 2, D, L);
testScanf("%nf", 1, I);
testScanf("%10s", 1, 11);
testScanf("%10c", 1, 10);
testScanf("%%10s", 0);
testScanf("%*10s", 0);
testScanf("%*d", 0);
testScanf("%4d%8f%c", 3, I, F, C);
testScanf("%s%d", 2, scanf_buf_size, I);
testScanf("%[abc]", 1, scanf_buf_size);
testScanf("%4[bcdef]", 1, 5);
testScanf("%[]]", 1, scanf_buf_size);
testScanf("%8[^]%d0-9-]%c", 2, 9, C);
testScanf("%*[^:]%n:%d:%1[ ]%n", 4, I, I, 2, I);
testScanf("%*d%u", 1, I);
testScanf("%c%d", 2, C, I);
testScanf("%A%lf", 2, F, D);
testScanf("%ms %Lf", 2, P, LD);
testScanf("s%Las", 1, LD);
testScanf("%ar", 1, F);
// In the cases with std::min below the format spec can be interpreted as
// either floating-something, or (GNU extension) callee-allocated string.
// Our conservative implementation reports one of the two possibilities with
// the least store range.
testScanf("%a[", 0);
testScanf("%a[]", 0);
testScanf("%a[]]", 1, std::min(F, P));
testScanf("%a[abc]", 1, std::min(F, P));
testScanf("%a[^abc]", 1, std::min(F, P));
testScanf("%a[ab%c] %d", 0);
testScanf("%a[^ab%c] %d", 0);
testScanf("%as", 1, std::min(F, P));
testScanf("%aS", 1, std::min(F, P));
testScanf("%a13S", 1, std::min(F, P));
testScanf("%alS", 1, std::min(F, P));
testScanfNoGnuMalloc("s%Las", 1, LD);
testScanfNoGnuMalloc("%ar", 1, F);
testScanfNoGnuMalloc("%a[", 1, F);
testScanfNoGnuMalloc("%a[]", 1, F);
testScanfNoGnuMalloc("%a[]]", 1, F);
testScanfNoGnuMalloc("%a[abc]", 1, F);
testScanfNoGnuMalloc("%a[^abc]", 1, F);
testScanfNoGnuMalloc("%a[ab%c] %d", 3, F, C, I);
testScanfNoGnuMalloc("%a[^ab%c] %d", 3, F, C, I);
testScanfNoGnuMalloc("%as", 1, F);
testScanfNoGnuMalloc("%aS", 1, F);
testScanfNoGnuMalloc("%a13S", 1, F);
testScanfNoGnuMalloc("%alS", 1, F);
testScanf("%5$d", 0);
testScanf("%md", 0);
testScanf("%m10s", 0);
testScanfPartial("%d%d%d%d //1\n", 1, 1, I);
testScanfPartial("%d%d%d%d //2\n", 2, 2, I, I);
testScanfPartial("%d%d%d%d //3\n", 3, 3, I, I, I);
testScanfPartial("%d%d%d%d //4\n", 4, 4, I, I, I, I);
testScanfPartial("%d%n%n%d //1\n", 1, 1, I);
testScanfPartial("%d%n%n%d //2\n", 2, 4, I, I, I, I);
testScanfPartial("%d%n%n%d %s %s", 3, 5, I, I, I, I, scanf_buf_size);
testScanfPartial("%d%n%n%d %s %s", 4, 6, I, I, I, I, scanf_buf_size,
scanf_buf_size);
}
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