src/hotspot/os/posix/forbiddenFunctions_posix.hpp

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#ifndef OS_POSIX_FORBIDDENFUNCTIONS_POSIX_HPP
#define OS_POSIX_FORBIDDENFUNCTIONS_POSIX_HPP

#include "utilities/compilerWarnings.hpp"

// For types used in the signatures.
#include <stddef.h>

// Workaround for noreturn functions: _exit - see the clang
// definition of FORBIDDEN_FUNCTION_NORETURN_ATTRIBUTE.
#ifdef __clang__
#include <unistd.h>
#endif

// If needed, add os::strndup and use that instead.
FORBID_C_FUNCTION(char* strndup(const char*, size_t), "don't use");

// These are unimplementable for Windows, and they aren't useful for a
// POSIX implementation of NMT either.
// https://stackoverflow.com/questions/62962839/stdaligned-alloc-missing-from-visual-studio-2019
FORBID_C_FUNCTION(int posix_memalign(void**, size_t, size_t), "don't use");
FORBID_C_FUNCTION(void* aligned_alloc(size_t, size_t), "don't use");

// realpath with a null second argument mallocs a string for the result.
// With a non-null second argument, there is a risk of buffer overrun.
PRAGMA_DIAG_PUSH
FORBIDDEN_FUNCTION_IGNORE_CLANG_FORTIFY_WARNING
FORBID_C_FUNCTION(char* realpath(const char*, char*), "use os::realpath");
PRAGMA_DIAG_POP

// Returns a malloc'ed string.
FORBID_C_FUNCTION(char* get_current_dir_name(), "use os::get_current_directory");

// Problematic API that should never be used.
FORBID_C_FUNCTION(char* getwd(char*), "use os::get_current_directory");

// BSD utility that is subtly different from realloc.
FORBID_C_FUNCTION(void* reallocf(void*, size_t), "use os::realloc");

#endif // OS_POSIX_FORBIDDENFUNCTIONS_POSIX_HPP