libsanitizer/include/sanitizer/common_interface_defs.h - gcc - Git at Google

 //===-- sanitizer/common_interface_defs.h -----------------------*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Common part of the public sanitizer interface.
 //===----------------------------------------------------------------------===//

 #ifndef SANITIZER_COMMON_INTERFACE_DEFS_H
 #define SANITIZER_COMMON_INTERFACE_DEFS_H

 #include <stddef.h>
 #include <stdint.h>

 // GCC does not understand __has_feature.
 #if !defined(__has_feature)
 #define __has_feature(x) 0
 #endif

 #ifdef __cplusplus
 extern "C" {
 #endif
 // Arguments for __sanitizer_sandbox_on_notify() below.
 typedef struct {
   // Enable sandbox support in sanitizer coverage.
   int coverage_sandboxed;
   // File descriptor to write coverage data to. If -1 is passed, a file will
   // be pre-opened by __sanitizer_sandbox_on_notify(). This field has no
   // effect if coverage_sandboxed == 0.
   intptr_t coverage_fd;
   // If non-zero, split the coverage data into well-formed blocks. This is
   // useful when coverage_fd is a socket descriptor. Each block will contain
   // a header, allowing data from multiple processes to be sent over the same
   // socket.
   unsigned int coverage_max_block_size;
 } __sanitizer_sandbox_arguments;

 // Tell the tools to write their reports to "path.<pid>" instead of stderr.
 void __sanitizer_set_report_path(const char *path);
 // Tell the tools to write their reports to the provided file descriptor
 // (casted to void *).
 void __sanitizer_set_report_fd(void *fd);
 // Get the current full report file path, if a path was specified by
 // an earlier call to __sanitizer_set_report_path. Returns null otherwise.
 const char *__sanitizer_get_report_path();

 // Notify the tools that the sandbox is going to be turned on. The reserved
 // parameter will be used in the future to hold a structure with functions
 // that the tools may call to bypass the sandbox.
 void __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);

 // This function is called by the tool when it has just finished reporting
 // an error. 'error_summary' is a one-line string that summarizes
 // the error message. This function can be overridden by the client.
 void __sanitizer_report_error_summary(const char *error_summary);

 // Some of the sanitizers (for example ASan/TSan) could miss bugs that happen
 // in unaligned loads/stores. To find such bugs reliably, you need to replace
 // plain unaligned loads/stores with these calls.

 /// Loads a 16-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 ///
 /// \returns Loaded value.
 uint16_t __sanitizer_unaligned_load16(const void *p);

 /// Loads a 32-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 ///
 /// \returns Loaded value.
 uint32_t __sanitizer_unaligned_load32(const void *p);

 /// Loads a 64-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 ///
 /// \returns Loaded value.
 uint64_t __sanitizer_unaligned_load64(const void *p);

 /// Stores a 16-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 /// \param x 16-bit value to store.
 void __sanitizer_unaligned_store16(void *p, uint16_t x);

 /// Stores a 32-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 /// \param x 32-bit value to store.
 void __sanitizer_unaligned_store32(void *p, uint32_t x);

 /// Stores a 64-bit unaligned value.
 ///
 /// \param p Pointer to unaligned memory.
 /// \param x 64-bit value to store.
 void __sanitizer_unaligned_store64(void *p, uint64_t x);

 // Returns 1 on the first call, then returns 0 thereafter.  Called by the tool
 // to ensure only one report is printed when multiple errors occur
 // simultaneously.
 int __sanitizer_acquire_crash_state();

 /// Annotates the current state of a contiguous container, such as
 /// <c>std::vector</c>, <c>std::string</c>, or similar.
 ///
 /// A contiguous container is a container that keeps all of its elements
 /// in a contiguous region of memory. The container owns the region of memory
 /// <c>[beg, end)</c>; the memory <c>[beg, mid)</c> is used to store the
 /// current elements, and the memory <c>[mid, end)</c> is reserved for future
 /// elements (<c>beg <= mid <= end</c>). For example, in
 /// <c>std::vector<> v</c>:
 ///
 /// \code
 ///   beg = &v[0];
 ///   end = beg + v.capacity() * sizeof(v[0]);
 ///   mid = beg + v.size()     * sizeof(v[0]);
 /// \endcode
 ///
 /// This annotation tells the Sanitizer tool about the current state of the
 /// container so that the tool can report errors when memory from
 /// <c>[mid, end)</c> is accessed. Insert this annotation into methods like
 /// <c>push_back()</c> or <c>pop_back()</c>. Supply the old and new values of
 /// <c>mid</c>(<c><i>old_mid</i></c> and <c><i>new_mid</i></c>). In the initial
 /// state <c>mid == end</c>, so that should be the final state when the
 /// container is destroyed or when the container reallocates the storage.
 ///
 /// For ASan, <c><i>beg</i></c> should be 8-aligned and <c><i>end</i></c>
 /// should be either 8-aligned or it should point to the end of a separate
 /// heap-, stack-, or global-allocated buffer. So the following example will
 /// not work:
 ///
 /// \code
 ///   int64_t x[2]; // 16 bytes, 8-aligned
 ///   char *beg = (char *)&x[0];
 ///   char *end = beg + 12; // Not 8-aligned, not the end of the buffer
 /// \endcode
 ///
 /// The following, however, will work:
 /// \code
 ///   int32_t x[3]; // 12 bytes, but 8-aligned under ASan.
 ///   char *beg = (char*)&x[0];
 ///   char *end = beg + 12; // Not 8-aligned, but is the end of the buffer
 /// \endcode
 ///
 /// \note  Use this function with caution and do not use for anything other
 /// than vector-like classes.
 ///
 /// \param beg Beginning of memory region.
 /// \param end End of memory region.
 /// \param old_mid Old middle of memory region.
 /// \param new_mid New middle of memory region.
 void __sanitizer_annotate_contiguous_container(const void *beg,
                                                const void *end,
                                                const void *old_mid,
                                                const void *new_mid);

 /// Returns true if the contiguous container <c>[beg, end)</c> is properly
 /// poisoned.
 ///
 /// Proper poisoning could occur, for example, with
 /// <c>__sanitizer_annotate_contiguous_container</c>), that is, if
 /// <c>[beg, mid)</c> is addressable and <c>[mid, end)</c> is unaddressable.
 /// Full verification requires O (<c>end - beg</c>) time; this function tries
 /// to avoid such complexity by touching only parts of the container around
 /// <c><i>beg</i></c>, <c><i>mid</i></c>, and <c><i>end</i></c>.
 ///
 /// \param beg Beginning of memory region.
 /// \param mid Middle of memory region.
 /// \param end Old end of memory region.
 ///
 /// \returns True if the contiguous container <c>[beg, end)</c> is properly
 ///  poisoned.
 int __sanitizer_verify_contiguous_container(const void *beg, const void *mid,
                                             const void *end);

 /// Similar to <c>__sanitizer_verify_contiguous_container()</c> but also
 /// returns the address of the first improperly poisoned byte.
 ///
 /// Returns NULL if the area is poisoned properly.
 ///
 /// \param beg Beginning of memory region.
 /// \param mid Middle of memory region.
 /// \param end Old end of memory region.
 ///
 /// \returns The bad address or NULL.
 const void *__sanitizer_contiguous_container_find_bad_address(const void *beg,
                                                               const void *mid,
                                                               const void *end);

 /// Prints the stack trace leading to this call (useful for calling from the
 /// debugger).
 void __sanitizer_print_stack_trace(void);

 // Symbolizes the supplied 'pc' using the format string 'fmt'.
 // Outputs at most 'out_buf_size' bytes into 'out_buf'.
 // If 'out_buf' is not empty then output is zero or more non empty C strings
 // followed by single empty C string. Multiple strings can be returned if PC
 // corresponds to inlined function. Inlined frames are printed in the order
 // from "most-inlined" to the "least-inlined", so the last frame should be the
 // not inlined function.
 // Inlined frames can be removed with 'symbolize_inline_frames=0'.
 // The format syntax is described in
 // lib/sanitizer_common/sanitizer_stacktrace_printer.h.
 void __sanitizer_symbolize_pc(void *pc, const char *fmt, char *out_buf,
                               size_t out_buf_size);
 // Same as __sanitizer_symbolize_pc, but for data section (i.e. globals).
 void __sanitizer_symbolize_global(void *data_ptr, const char *fmt,
                                   char *out_buf, size_t out_buf_size);

 /// Sets the callback to be called immediately before death on error.
 ///
 /// Passing 0 will unset the callback.
 ///
 /// \param callback User-provided callback.
 void __sanitizer_set_death_callback(void (*callback)(void));


 // Interceptor hooks.
 // Whenever a libc function interceptor is called, it checks if the
 // corresponding weak hook is defined, and calls it if it is indeed defined.
 // The primary use-case is data-flow-guided fuzzing, where the fuzzer needs
 // to know what is being passed to libc functions (for example memcmp).
 // FIXME: implement more hooks.

 /// Interceptor hook for <c>memcmp()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param n Number of bytes to compare.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_memcmp(void *called_pc, const void *s1,
                                   const void *s2, size_t n, int result);

 /// Interceptor hook for <c>strncmp()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param n Number of bytes to compare.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_strncmp(void *called_pc, const char *s1,
                                   const char *s2, size_t n, int result);

 /// Interceptor hook for <c>strncasecmp()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param n Number of bytes to compare.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_strncasecmp(void *called_pc, const char *s1,
                                        const char *s2, size_t n, int result);

 /// Interceptor hook for <c>strcmp()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_strcmp(void *called_pc, const char *s1,
                                   const char *s2, int result);

 /// Interceptor hook for <c>strcasecmp()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_strcasecmp(void *called_pc, const char *s1,
                                       const char *s2, int result);

 /// Interceptor hook for <c>strstr()</c>.
 ///
 /// \param called_pc PC (program counter) address of the original call.
 /// \param s1 Pointer to block of memory.
 /// \param s2 Pointer to block of memory.
 /// \param result Value returned by the intercepted function.
 void __sanitizer_weak_hook_strstr(void *called_pc, const char *s1,
                                   const char *s2, char *result);

 void __sanitizer_weak_hook_strcasestr(void *called_pc, const char *s1,
                                       const char *s2, char *result);

 void __sanitizer_weak_hook_memmem(void *called_pc,
                                   const void *s1, size_t len1,
                                   const void *s2, size_t len2, void *result);

 // Prints stack traces for all live heap allocations ordered by total
 // allocation size until top_percent of total live heap is shown. top_percent
 // should be between 1 and 100. At most max_number_of_contexts contexts
 // (stack traces) are printed.
 // Experimental feature currently available only with ASan on Linux/x86_64.
 void __sanitizer_print_memory_profile(size_t top_percent,
                                       size_t max_number_of_contexts);

 /// Notify ASan that a fiber switch has started (required only if implementing
 /// your own fiber library).
 ///
 /// Before switching to a different stack, you must call
 /// <c>__sanitizer_start_switch_fiber()</c> with a pointer to the bottom of the
 /// destination stack and with its size. When code starts running on the new
 /// stack, it must call <c>__sanitizer_finish_switch_fiber()</c> to finalize
 /// the switch. The <c>__sanitizer_start_switch_fiber()</c> function takes a
 /// <c>void**</c> pointer argument to store the current fake stack if there is
 /// one (it is necessary when the runtime option
 /// <c>detect_stack_use_after_return</c> is enabled).
 ///
 /// When restoring a stack, this <c>void**</c> pointer must be given to the
 /// <c>__sanitizer_finish_switch_fiber()</c> function. In most cases, this
 /// pointer can be stored on the stack immediately before switching. When
 /// leaving a fiber definitely, NULL must be passed as the first argument to
 /// the <c>__sanitizer_start_switch_fiber()</c> function so that the fake stack
 /// is destroyed. If your program does not need stack use-after-return
 /// detection, you can always pass NULL to these two functions.
 ///
 /// \note The fake stack mechanism is disabled during fiber switch, so if a
 /// signal callback runs during the switch, it will not benefit from stack
 /// use-after-return detection.
 ///
 /// \param[out] fake_stack_save Fake stack save location.
 /// \param bottom Bottom address of stack.
 /// \param size Size of stack in bytes.
 void __sanitizer_start_switch_fiber(void **fake_stack_save,
                                     const void *bottom, size_t size);

 /// Notify ASan that a fiber switch has completed (required only if
 /// implementing your own fiber library).
 ///
 /// When code starts running on the new stack, it must call
 /// <c>__sanitizer_finish_switch_fiber()</c> to finalize
 /// the switch. For usage details, see the description of
 /// <c>__sanitizer_start_switch_fiber()</c>.
 ///
 /// \param fake_stack_save Fake stack save location.
 /// \param[out] bottom_old Bottom address of old stack.
 /// \param[out] size_old Size of old stack in bytes.
 void __sanitizer_finish_switch_fiber(void *fake_stack_save,
                                      const void **bottom_old,
                                      size_t *size_old);

 // Get full module name and calculate pc offset within it.
 // Returns 1 if pc belongs to some module, 0 if module was not found.
 int __sanitizer_get_module_and_offset_for_pc(void *pc, char *module_path,
                                              size_t module_path_len,
                                              void **pc_offset);

 #ifdef __cplusplus
 }  // extern "C"
 #endif

 #endif  // SANITIZER_COMMON_INTERFACE_DEFS_H
	//===-- sanitizer/common_interface_defs.h ------------------------ C++ --===//
	//
	// 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
	//
	//===----------------------------------------------------------------------===//
	//
	// Common part of the public sanitizer interface.
	//===----------------------------------------------------------------------===//

	#ifndef SANITIZER_COMMON_INTERFACE_DEFS_H
	#define SANITIZER_COMMON_INTERFACE_DEFS_H

	#include <stddef.h>
	#include <stdint.h>

	// GCC does not understand __has_feature.
	#if !defined(__has_feature)
	#define __has_feature(x) 0
	#endif

	#ifdef __cplusplus
	extern "C" {
	#endif
	// Arguments for __sanitizer_sandbox_on_notify() below.
	typedef struct {
	// Enable sandbox support in sanitizer coverage.
	int coverage_sandboxed;
	// File descriptor to write coverage data to. If -1 is passed, a file will
	// be pre-opened by __sanitizer_sandbox_on_notify(). This field has no
	// effect if coverage_sandboxed == 0.
	intptr_t coverage_fd;
	// If non-zero, split the coverage data into well-formed blocks. This is
	// useful when coverage_fd is a socket descriptor. Each block will contain
	// a header, allowing data from multiple processes to be sent over the same
	// socket.
	unsigned int coverage_max_block_size;
	} __sanitizer_sandbox_arguments;

	// Tell the tools to write their reports to "path.<pid>" instead of stderr.
	void __sanitizer_set_report_path(const char *path);
	// Tell the tools to write their reports to the provided file descriptor
	// (casted to void *).
	void __sanitizer_set_report_fd(void *fd);
	// Get the current full report file path, if a path was specified by
	// an earlier call to __sanitizer_set_report_path. Returns null otherwise.
	const char *__sanitizer_get_report_path();

	// Notify the tools that the sandbox is going to be turned on. The reserved
	// parameter will be used in the future to hold a structure with functions
	// that the tools may call to bypass the sandbox.
	void __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);

	// This function is called by the tool when it has just finished reporting
	// an error. 'error_summary' is a one-line string that summarizes
	// the error message. This function can be overridden by the client.
	void __sanitizer_report_error_summary(const char *error_summary);

	// Some of the sanitizers (for example ASan/TSan) could miss bugs that happen
	// in unaligned loads/stores. To find such bugs reliably, you need to replace
	// plain unaligned loads/stores with these calls.

	/// Loads a 16-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	///
	/// \returns Loaded value.
	uint16_t __sanitizer_unaligned_load16(const void *p);

	/// Loads a 32-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	///
	/// \returns Loaded value.
	uint32_t __sanitizer_unaligned_load32(const void *p);

	/// Loads a 64-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	///
	/// \returns Loaded value.
	uint64_t __sanitizer_unaligned_load64(const void *p);

	/// Stores a 16-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	/// \param x 16-bit value to store.
	void __sanitizer_unaligned_store16(void *p, uint16_t x);

	/// Stores a 32-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	/// \param x 32-bit value to store.
	void __sanitizer_unaligned_store32(void *p, uint32_t x);

	/// Stores a 64-bit unaligned value.
	///
	/// \param p Pointer to unaligned memory.
	/// \param x 64-bit value to store.
	void __sanitizer_unaligned_store64(void *p, uint64_t x);

	// Returns 1 on the first call, then returns 0 thereafter. Called by the tool
	// to ensure only one report is printed when multiple errors occur
	// simultaneously.
	int __sanitizer_acquire_crash_state();

	/// Annotates the current state of a contiguous container, such as
	/// <c>std::vector</c>, <c>std::string</c>, or similar.
	///
	/// A contiguous container is a container that keeps all of its elements
	/// in a contiguous region of memory. The container owns the region of memory
	/// <c>[beg, end)</c>; the memory <c>[beg, mid)</c> is used to store the
	/// current elements, and the memory <c>[mid, end)</c> is reserved for future
	/// elements (<c>beg <= mid <= end</c>). For example, in
	/// <c>std::vector<> v</c>:
	///
	/// \code
	/// beg = &v[0];
	/// end = beg + v.capacity() * sizeof(v[0]);
	/// mid = beg + v.size() * sizeof(v[0]);
	/// \endcode
	///
	/// This annotation tells the Sanitizer tool about the current state of the
	/// container so that the tool can report errors when memory from
	/// <c>[mid, end)</c> is accessed. Insert this annotation into methods like
	/// <c>push_back()</c> or <c>pop_back()</c>. Supply the old and new values of
	/// <c>mid</c>(<c><i>old_mid</i></c> and <c><i>new_mid</i></c>). In the initial
	/// state <c>mid == end</c>, so that should be the final state when the
	/// container is destroyed or when the container reallocates the storage.
	///
	/// For ASan, <c><i>beg</i></c> should be 8-aligned and <c><i>end</i></c>
	/// should be either 8-aligned or it should point to the end of a separate
	/// heap-, stack-, or global-allocated buffer. So the following example will
	/// not work:
	///
	/// \code
	/// int64_t x[2]; // 16 bytes, 8-aligned
	/// char beg = (char )&x[0];
	/// char *end = beg + 12; // Not 8-aligned, not the end of the buffer
	/// \endcode
	///
	/// The following, however, will work:
	/// \code
	/// int32_t x[3]; // 12 bytes, but 8-aligned under ASan.
	/// char beg = (char)&x[0];
	/// char *end = beg + 12; // Not 8-aligned, but is the end of the buffer
	/// \endcode
	///
	/// \note Use this function with caution and do not use for anything other
	/// than vector-like classes.
	///
	/// \param beg Beginning of memory region.
	/// \param end End of memory region.
	/// \param old_mid Old middle of memory region.
	/// \param new_mid New middle of memory region.
	void __sanitizer_annotate_contiguous_container(const void *beg,
	const void *end,
	const void *old_mid,
	const void *new_mid);

	/// Returns true if the contiguous container <c>[beg, end)</c> is properly
	/// poisoned.
	///
	/// Proper poisoning could occur, for example, with
	/// <c>__sanitizer_annotate_contiguous_container</c>), that is, if
	/// <c>[beg, mid)</c> is addressable and <c>[mid, end)</c> is unaddressable.
	/// Full verification requires O (<c>end - beg</c>) time; this function tries
	/// to avoid such complexity by touching only parts of the container around
	/// <c><i>beg</i></c>, <c><i>mid</i></c>, and <c><i>end</i></c>.
	///
	/// \param beg Beginning of memory region.
	/// \param mid Middle of memory region.
	/// \param end Old end of memory region.
	///
	/// \returns True if the contiguous container <c>[beg, end)</c> is properly
	/// poisoned.
	int __sanitizer_verify_contiguous_container(const void beg, const void mid,
	const void *end);

	/// Similar to <c>__sanitizer_verify_contiguous_container()</c> but also
	/// returns the address of the first improperly poisoned byte.
	///
	/// Returns NULL if the area is poisoned properly.
	///
	/// \param beg Beginning of memory region.
	/// \param mid Middle of memory region.
	/// \param end Old end of memory region.
	///
	/// \returns The bad address or NULL.
	const void __sanitizer_contiguous_container_find_bad_address(const void beg,
	const void *mid,
	const void *end);

	/// Prints the stack trace leading to this call (useful for calling from the
	/// debugger).
	void __sanitizer_print_stack_trace(void);

	// Symbolizes the supplied 'pc' using the format string 'fmt'.
	// Outputs at most 'out_buf_size' bytes into 'out_buf'.
	// If 'out_buf' is not empty then output is zero or more non empty C strings
	// followed by single empty C string. Multiple strings can be returned if PC
	// corresponds to inlined function. Inlined frames are printed in the order
	// from "most-inlined" to the "least-inlined", so the last frame should be the
	// not inlined function.
	// Inlined frames can be removed with 'symbolize_inline_frames=0'.
	// The format syntax is described in
	// lib/sanitizer_common/sanitizer_stacktrace_printer.h.
	void __sanitizer_symbolize_pc(void pc, const char fmt, char *out_buf,
	size_t out_buf_size);
	// Same as __sanitizer_symbolize_pc, but for data section (i.e. globals).
	void __sanitizer_symbolize_global(void data_ptr, const char fmt,
	char *out_buf, size_t out_buf_size);

	/// Sets the callback to be called immediately before death on error.
	///
	/// Passing 0 will unset the callback.
	///
	/// \param callback User-provided callback.
	void __sanitizer_set_death_callback(void (*callback)(void));


	// Interceptor hooks.
	// Whenever a libc function interceptor is called, it checks if the
	// corresponding weak hook is defined, and calls it if it is indeed defined.
	// The primary use-case is data-flow-guided fuzzing, where the fuzzer needs
	// to know what is being passed to libc functions (for example memcmp).
	// FIXME: implement more hooks.

	/// Interceptor hook for <c>memcmp()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param n Number of bytes to compare.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_memcmp(void called_pc, const void s1,
	const void *s2, size_t n, int result);

	/// Interceptor hook for <c>strncmp()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param n Number of bytes to compare.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_strncmp(void called_pc, const char s1,
	const char *s2, size_t n, int result);

	/// Interceptor hook for <c>strncasecmp()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param n Number of bytes to compare.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_strncasecmp(void called_pc, const char s1,
	const char *s2, size_t n, int result);

	/// Interceptor hook for <c>strcmp()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_strcmp(void called_pc, const char s1,
	const char *s2, int result);

	/// Interceptor hook for <c>strcasecmp()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_strcasecmp(void called_pc, const char s1,
	const char *s2, int result);

	/// Interceptor hook for <c>strstr()</c>.
	///
	/// \param called_pc PC (program counter) address of the original call.
	/// \param s1 Pointer to block of memory.
	/// \param s2 Pointer to block of memory.
	/// \param result Value returned by the intercepted function.
	void __sanitizer_weak_hook_strstr(void called_pc, const char s1,
	const char s2, char result);

	void __sanitizer_weak_hook_strcasestr(void called_pc, const char s1,
	const char s2, char result);

	void __sanitizer_weak_hook_memmem(void *called_pc,
	const void *s1, size_t len1,
	const void s2, size_t len2, void result);

	// Prints stack traces for all live heap allocations ordered by total
	// allocation size until top_percent of total live heap is shown. top_percent
	// should be between 1 and 100. At most max_number_of_contexts contexts
	// (stack traces) are printed.
	// Experimental feature currently available only with ASan on Linux/x86_64.
	void __sanitizer_print_memory_profile(size_t top_percent,
	size_t max_number_of_contexts);

	/// Notify ASan that a fiber switch has started (required only if implementing
	/// your own fiber library).
	///
	/// Before switching to a different stack, you must call
	/// <c>__sanitizer_start_switch_fiber()</c> with a pointer to the bottom of the
	/// destination stack and with its size. When code starts running on the new
	/// stack, it must call <c>__sanitizer_finish_switch_fiber()</c> to finalize
	/// the switch. The <c>__sanitizer_start_switch_fiber()</c> function takes a
	/// <c>void**</c> pointer argument to store the current fake stack if there is
	/// one (it is necessary when the runtime option
	/// <c>detect_stack_use_after_return</c> is enabled).
	///
	/// When restoring a stack, this <c>void**</c> pointer must be given to the
	/// <c>__sanitizer_finish_switch_fiber()</c> function. In most cases, this
	/// pointer can be stored on the stack immediately before switching. When
	/// leaving a fiber definitely, NULL must be passed as the first argument to
	/// the <c>__sanitizer_start_switch_fiber()</c> function so that the fake stack
	/// is destroyed. If your program does not need stack use-after-return
	/// detection, you can always pass NULL to these two functions.
	///
	/// \note The fake stack mechanism is disabled during fiber switch, so if a
	/// signal callback runs during the switch, it will not benefit from stack
	/// use-after-return detection.
	///
	/// \param[out] fake_stack_save Fake stack save location.
	/// \param bottom Bottom address of stack.
	/// \param size Size of stack in bytes.
	void __sanitizer_start_switch_fiber(void **fake_stack_save,
	const void *bottom, size_t size);

	/// Notify ASan that a fiber switch has completed (required only if
	/// implementing your own fiber library).
	///
	/// When code starts running on the new stack, it must call
	/// <c>__sanitizer_finish_switch_fiber()</c> to finalize
	/// the switch. For usage details, see the description of
	/// <c>__sanitizer_start_switch_fiber()</c>.
	///
	/// \param fake_stack_save Fake stack save location.
	/// \param[out] bottom_old Bottom address of old stack.
	/// \param[out] size_old Size of old stack in bytes.
	void __sanitizer_finish_switch_fiber(void *fake_stack_save,
	const void **bottom_old,
	size_t *size_old);

	// Get full module name and calculate pc offset within it.
	// Returns 1 if pc belongs to some module, 0 if module was not found.
	int __sanitizer_get_module_and_offset_for_pc(void pc, char module_path,
	size_t module_path_len,
	void **pc_offset);

	#ifdef __cplusplus
	} // extern "C"
	#endif

	#endif // SANITIZER_COMMON_INTERFACE_DEFS_H