Author: sribee8
Date: 2025-07-14T16:36:24Z
New Revision: 1f97c9432d010c7c5eefc5ebe2648af2d9d5863d
URL: https://github.com/llvm/llvm-project/commit/1f97c9432d010c7c5eefc5ebe2648af2d9d5863d
DIFF: https://github.com/llvm/llvm-project/commit/1f97c9432d010c7c5eefc5ebe2648af2d9d5863d.diff
LOG: [libc] exp fuzz tests (#148086)
Created fuzz tests for exp functions
---------
Co-authored-by: Sriya Pratipati <sriyap at google.com>
Added:
libc/fuzzing/math/exp10_fuzz.cpp
libc/fuzzing/math/exp2_fuzz.cpp
libc/fuzzing/math/exp_fuzz.cpp
libc/fuzzing/math/expm1_fuzz.cpp
Modified:
libc/fuzzing/math/CMakeLists.txt
Removed:
################################################################################
diff --git a/libc/fuzzing/math/CMakeLists.txt b/libc/fuzzing/math/CMakeLists.txt
index e3c29651917fc..bf2be5c0b3cea 100644
--- a/libc/fuzzing/math/CMakeLists.txt
+++ b/libc/fuzzing/math/CMakeLists.txt
@@ -62,6 +62,42 @@ add_libc_fuzzer(
libc.src.math.nextafterl
)
+add_libc_fuzzer(
+ exp_fuzz
+ NEED_MPFR
+ SRCS
+ exp_fuzz.cpp
+ DEPENDS
+ libc.src.math.exp
+)
+
+add_libc_fuzzer(
+ exp10_fuzz
+ NEED_MPFR
+ SRCS
+ exp10_fuzz.cpp
+ DEPENDS
+ libc.src.math.exp10
+)
+
+add_libc_fuzzer(
+ exp2_fuzz
+ NEED_MPFR
+ SRCS
+ exp2_fuzz.cpp
+ DEPENDS
+ libc.src.math.exp2
+)
+
+add_libc_fuzzer(
+ expm1_fuzz
+ NEED_MPFR
+ SRCS
+ expm1_fuzz.cpp
+ DEPENDS
+ libc.src.math.expm1
+)
+
add_libc_fuzzer(
asin_fuzz
NEED_MPFR
diff --git a/libc/fuzzing/math/exp10_fuzz.cpp b/libc/fuzzing/math/exp10_fuzz.cpp
new file mode 100644
index 0000000000000..2baef03a264a4
--- /dev/null
+++ b/libc/fuzzing/math/exp10_fuzz.cpp
@@ -0,0 +1,38 @@
+//===-- exp10_fuzz.cpp ----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// Fuzzing test for llvm-libc exp10 implementation.
+///
+//===----------------------------------------------------------------------===//
+
+#include "src/math/exp10.h"
+#include "utils/MPFRWrapper/mpfr_inc.h"
+#include <math.h>
+
+extern "C" int LLVMFuzzerTestOneInput(double x) {
+ // remove NaN and inf
+ if (isnan(x) || isinf(x))
+ return 0;
+ // signed zeros already tested in unit tests
+ if (signbit(x) && x == 0.0)
+ return 0;
+ mpfr_t input;
+ mpfr_init2(input, 53);
+ mpfr_set_d(input, x, MPFR_RNDN);
+ int output = mpfr_exp10(input, input, MPFR_RNDN);
+ mpfr_subnormalize(input, output, MPFR_RNDN);
+ double to_compare = mpfr_get_d(input, MPFR_RNDN);
+
+ double result = LIBC_NAMESPACE::exp10(x);
+
+ if (result != to_compare)
+ __builtin_trap();
+
+ mpfr_clear(input);
+ return 0;
+}
diff --git a/libc/fuzzing/math/exp2_fuzz.cpp b/libc/fuzzing/math/exp2_fuzz.cpp
new file mode 100644
index 0000000000000..8a2959047a6ca
--- /dev/null
+++ b/libc/fuzzing/math/exp2_fuzz.cpp
@@ -0,0 +1,38 @@
+//===-- exp2_fuzz.cpp -----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// Fuzzing test for llvm-libc exp2 implementation.
+///
+//===----------------------------------------------------------------------===//
+
+#include "src/math/exp2.h"
+#include "utils/MPFRWrapper/mpfr_inc.h"
+#include <math.h>
+
+extern "C" int LLVMFuzzerTestOneInput(double x) {
+ // remove NaN and inf
+ if (isnan(x) || isinf(x))
+ return 0;
+ // signed zeros already tested in unit tests
+ if (signbit(x) && x == 0.0)
+ return 0;
+ mpfr_t input;
+ mpfr_init2(input, 53);
+ mpfr_set_d(input, x, MPFR_RNDN);
+ int output = mpfr_exp2(input, input, MPFR_RNDN);
+ mpfr_subnormalize(input, output, MPFR_RNDN);
+ double to_compare = mpfr_get_d(input, MPFR_RNDN);
+
+ double result = LIBC_NAMESPACE::exp2(x);
+
+ if (result != to_compare)
+ __builtin_trap();
+
+ mpfr_clear(input);
+ return 0;
+}
diff --git a/libc/fuzzing/math/exp_fuzz.cpp b/libc/fuzzing/math/exp_fuzz.cpp
new file mode 100644
index 0000000000000..97bc12dfa64c9
--- /dev/null
+++ b/libc/fuzzing/math/exp_fuzz.cpp
@@ -0,0 +1,38 @@
+//===-- exp_fuzz.cpp ------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// Fuzzing test for llvm-libc exp implementation.
+///
+//===----------------------------------------------------------------------===//
+
+#include "src/math/exp.h"
+#include "utils/MPFRWrapper/mpfr_inc.h"
+#include <math.h>
+
+extern "C" int LLVMFuzzerTestOneInput(double x) {
+ // remove NaN and inf
+ if (isnan(x) || isinf(x))
+ return 0;
+ // signed zeros already tested in unit tests
+ if (signbit(x) && x == 0.0)
+ return 0;
+ mpfr_t input;
+ mpfr_init2(input, 53);
+ mpfr_set_d(input, x, MPFR_RNDN);
+ int output = mpfr_exp(input, input, MPFR_RNDN);
+ mpfr_subnormalize(input, output, MPFR_RNDN);
+ double to_compare = mpfr_get_d(input, MPFR_RNDN);
+
+ double result = LIBC_NAMESPACE::exp(x);
+
+ if (result != to_compare)
+ __builtin_trap();
+
+ mpfr_clear(input);
+ return 0;
+}
diff --git a/libc/fuzzing/math/expm1_fuzz.cpp b/libc/fuzzing/math/expm1_fuzz.cpp
new file mode 100644
index 0000000000000..db507bb02b1d7
--- /dev/null
+++ b/libc/fuzzing/math/expm1_fuzz.cpp
@@ -0,0 +1,38 @@
+//===-- expm1_fuzz.cpp ----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// Fuzzing test for llvm-libc expm1 implementation.
+///
+//===----------------------------------------------------------------------===//
+
+#include "src/math/expm1.h"
+#include "utils/MPFRWrapper/mpfr_inc.h"
+#include <math.h>
+
+extern "C" int LLVMFuzzerTestOneInput(double x) {
+ // remove NaN and inf
+ if (isnan(x) || isinf(x))
+ return 0;
+ // signed zeros already tested in unit tests
+ if (signbit(x) && x == 0.0)
+ return 0;
+ mpfr_t input;
+ mpfr_init2(input, 53);
+ mpfr_set_d(input, x, MPFR_RNDN);
+ int output = mpfr_expm1(input, input, MPFR_RNDN);
+ mpfr_subnormalize(input, output, MPFR_RNDN);
+ double to_compare = mpfr_get_d(input, MPFR_RNDN);
+
+ double result = LIBC_NAMESPACE::expm1(x);
+
+ if (result != to_compare)
+ __builtin_trap();
+
+ mpfr_clear(input);
+ return 0;
+}