1*d89ec533Spatrick //===-- printf.h ------------------------------------------------*- C++ -*-===// 2*d89ec533Spatrick // 3*d89ec533Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*d89ec533Spatrick // See https://llvm.org/LICENSE.txt for license information. 5*d89ec533Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*d89ec533Spatrick // 7*d89ec533Spatrick //===----------------------------------------------------------------------===// 8*d89ec533Spatrick 9*d89ec533Spatrick #ifndef GWP_ASAN_OPTIONAL_PRINTF_H_ 10*d89ec533Spatrick #define GWP_ASAN_OPTIONAL_PRINTF_H_ 11*d89ec533Spatrick 12*d89ec533Spatrick namespace gwp_asan { 13*d89ec533Spatrick 14*d89ec533Spatrick // ================================ Requirements =============================== 15*d89ec533Spatrick // This function is required to be provided by the supporting allocator iff the 16*d89ec533Spatrick // allocator wants to use any of the optional components. 17*d89ec533Spatrick // ================================ Description ================================ 18*d89ec533Spatrick // This function shall produce output according to a strict subset of the C 19*d89ec533Spatrick // standard library's printf() family. This function must support printing the 20*d89ec533Spatrick // following formats: 21*d89ec533Spatrick // 1. integers: "%([0-9]*)?(z|ll)?{d,u,x,X}" 22*d89ec533Spatrick // 2. pointers: "%p" 23*d89ec533Spatrick // 3. strings: "%[-]([0-9]*)?(\\.\\*)?s" 24*d89ec533Spatrick // 4. chars: "%c" 25*d89ec533Spatrick // This function must be implemented in a signal-safe manner, and thus must not 26*d89ec533Spatrick // malloc(). 27*d89ec533Spatrick // =================================== Notes =================================== 28*d89ec533Spatrick // This function has a slightly different signature than the C standard 29*d89ec533Spatrick // library's printf(). Notably, it returns 'void' rather than 'int'. 30*d89ec533Spatrick typedef void (*Printf_t)(const char *Format, ...); 31*d89ec533Spatrick 32*d89ec533Spatrick } // namespace gwp_asan 33*d89ec533Spatrick #endif // GWP_ASAN_OPTIONAL_PRINTF_H_ 34