+2301
-0
lines changedFilter options
+2301
-0
lines changed Original file line number Diff line number Diff line change
@@ -56,6 +56,7 @@ set(TARGET_LIBC_ENTRYPOINTS
56 56
# stdlib.h entrypoints
57 57
libc.src.stdlib.abs
58 58
libc.src.stdlib.atoi
59 +
libc.src.stdlib.atof
59 60
libc.src.stdlib.atol
60 61
libc.src.stdlib.atoll
61 62
libc.src.stdlib.bsearch
@@ -65,6 +66,8 @@ set(TARGET_LIBC_ENTRYPOINTS
65 66
libc.src.stdlib.llabs
66 67
libc.src.stdlib.lldiv
67 68
libc.src.stdlib.qsort
69 +
libc.src.stdlib.strtod
70 +
libc.src.stdlib.strtof
68 71
libc.src.stdlib.strtol
69 72
libc.src.stdlib.strtoll
70 73
libc.src.stdlib.strtoul
@@ -6,3 +6,13 @@ add_libc_fuzzer(
6 6
libc.src.stdlib.qsort
7 7
)
8 8 9 +
add_libc_fuzzer(
10 +
atof_fuzz
11 +
SRCS
12 +
atof_fuzz.cpp
13 +
HDRS
14 +
StringParserOutputDiff.h
15 +
DEPENDS
16 +
libc.src.stdlib.atof
17 +
)
18 + Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
1 +
//===-- Template to diff single-input-single-output functions ---*- C++ -*-===//
2 +
//
3 +
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 +
// See https://llvm.org/LICENSE.txt for license information.
5 +
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 +
//
7 +
//===----------------------------------------------------------------------===//
8 + 9 +
#ifndef LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
10 +
#define LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
11 + 12 +
#include "fuzzing/math/Compare.h"
13 + 14 +
#include <stddef.h>
15 +
#include <stdint.h>
16 + 17 +
template <typename T> using StringInputSingleOutputFunc = T (*)(const char *);
18 + 19 +
template <typename T>
20 +
void StringParserOutputDiff(StringInputSingleOutputFunc<T> func1,
21 +
StringInputSingleOutputFunc<T> func2,
22 +
const uint8_t *data, size_t size) {
23 +
if (size < sizeof(T))
24 +
return;
25 + 26 +
const char *x = reinterpret_cast<const char *>(data);
27 + 28 +
T result1 = func1(x);
29 +
T result2 = func2(x);
30 + 31 +
if (!ValuesEqual(result1, result2))
32 +
__builtin_trap();
33 +
}
34 + 35 +
#endif // LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
1 +
//===-- atof_fuzz.cpp -----------------------------------------------------===//
2 +
//
3 +
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 +
// See https://llvm.org/LICENSE.txt for license information.
5 +
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 +
//
7 +
//===----------------------------------------------------------------------===//
8 +
///
9 +
/// Fuzzing test for llvm-libc atof implementation.
10 +
///
11 +
//===----------------------------------------------------------------------===//
12 +
#include "src/stdlib/atof.h"
13 +
#include <stddef.h>
14 +
#include <stdint.h>
15 +
#include <stdlib.h>
16 + 17 +
#include "fuzzing/stdlib/StringParserOutputDiff.h"
18 + 19 +
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
20 +
uint8_t *container = new uint8_t[size + 1];
21 +
if (!container)
22 +
__builtin_trap();
23 +
size_t i;
24 + 25 +
for (i = 0; i < size; ++i)
26 +
container[i] = data[i];
27 +
container[size] = '\0'; // Add null terminator to container.
28 + 29 +
StringParserOutputDiff<double>(&__llvm_libc::atof, &::atof, container, size);
30 +
delete[] container;
31 +
return 0;
32 +
}
Original file line number Diff line number Diff line change
@@ -495,6 +495,7 @@ def StdC : StandardSpec<"stdc"> {
495 495
FunctionSpec<"labs", RetValSpec<LongType>, [ArgSpec<LongType>]>,
496 496
FunctionSpec<"llabs", RetValSpec<LongLongType>, [ArgSpec<LongLongType>]>,
497 497 498 +
FunctionSpec<"atof", RetValSpec<DoubleType>, [ArgSpec<ConstCharRestrictedPtr>]>,
498 499
FunctionSpec<"atoi", RetValSpec<IntType>, [ArgSpec<ConstCharPtr>]>,
499 500
FunctionSpec<"atol", RetValSpec<LongType>, [ArgSpec<ConstCharPtr>]>,
500 501
FunctionSpec<"atoll", RetValSpec<LongLongType>, [ArgSpec<ConstCharPtr>]>,
@@ -505,6 +506,8 @@ def StdC : StandardSpec<"stdc"> {
505 506 506 507
FunctionSpec<"qsort", RetValSpec<VoidType>, [ArgSpec<VoidPtr>, ArgSpec<SizeTType>, ArgSpec<SizeTType>, ArgSpec<QSortCompareT>]>,
507 508 509 +
FunctionSpec<"strtod", RetValSpec<DoubleType>, [ArgSpec<ConstCharRestrictedPtr>, ArgSpec<CharRestrictedPtrPtr>]>,
510 +
FunctionSpec<"strtof", RetValSpec<FloatType>, [ArgSpec<ConstCharRestrictedPtr>, ArgSpec<CharRestrictedPtrPtr>]>,
508 511
FunctionSpec<"strtol", RetValSpec<LongType>, [ArgSpec<ConstCharRestrictedPtr>, ArgSpec<CharRestrictedPtrPtr>, ArgSpec<IntType>]>,
509 512
FunctionSpec<"strtoll", RetValSpec<LongLongType>, [ArgSpec<ConstCharRestrictedPtr>, ArgSpec<CharRestrictedPtrPtr>, ArgSpec<IntType>]>,
510 513
FunctionSpec<"strtoul", RetValSpec<UnsignedLongType>, [ArgSpec<ConstCharRestrictedPtr>, ArgSpec<CharRestrictedPtrPtr>, ArgSpec<IntType>]>,
@@ -23,12 +23,14 @@ add_header_library(
23 23
str_conv_utils
24 24
HDRS
25 25
str_conv_utils.h
26 +
str_to_float.h
26 27
DEPENDS
27 28
.ctype_utils
28 29
.high_precision_decimal
29 30
libc.include.errno
30 31
libc.src.errno.__errno_location
31 32
libc.utils.CPP.standalone_cpp
33 +
libc.src.__support.FPUtil.fputil
32 34
)
33 35 34 36
add_header_library(
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