forked from OSchip/llvm-project
199 lines
10 KiB
C++
199 lines
10 KiB
C++
//===-- sanitizer/common_interface_defs.h -----------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Common part of the public sanitizer interface.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_COMMON_INTERFACE_DEFS_H
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#define SANITIZER_COMMON_INTERFACE_DEFS_H
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#include <stddef.h>
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#include <stdint.h>
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// GCC does not understand __has_feature.
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#if !defined(__has_feature)
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# define __has_feature(x) 0
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Arguments for __sanitizer_sandbox_on_notify() below.
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typedef struct {
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// Enable sandbox support in sanitizer coverage.
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int coverage_sandboxed;
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// File descriptor to write coverage data to. If -1 is passed, a file will
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// be pre-opened by __sanitizer_sandobx_on_notify(). This field has no
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// effect if coverage_sandboxed == 0.
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intptr_t coverage_fd;
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// If non-zero, split the coverage data into well-formed blocks. This is
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// useful when coverage_fd is a socket descriptor. Each block will contain
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// a header, allowing data from multiple processes to be sent over the same
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// socket.
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unsigned int coverage_max_block_size;
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} __sanitizer_sandbox_arguments;
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// Tell the tools to write their reports to "path.<pid>" instead of stderr.
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void __sanitizer_set_report_path(const char *path);
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// Tell the tools to write their reports to the provided file descriptor
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// (casted to void *).
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void __sanitizer_set_report_fd(void *fd);
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// Notify the tools that the sandbox is going to be turned on. The reserved
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// parameter will be used in the future to hold a structure with functions
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// that the tools may call to bypass the sandbox.
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void __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);
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// This function is called by the tool when it has just finished reporting
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// an error. 'error_summary' is a one-line string that summarizes
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// the error message. This function can be overridden by the client.
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void __sanitizer_report_error_summary(const char *error_summary);
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// Some of the sanitizers (e.g. asan/tsan) may miss bugs that happen
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// in unaligned loads/stores. In order to find such bugs reliably one needs
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// to replace plain unaligned loads/stores with these calls.
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uint16_t __sanitizer_unaligned_load16(const void *p);
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uint32_t __sanitizer_unaligned_load32(const void *p);
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uint64_t __sanitizer_unaligned_load64(const void *p);
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void __sanitizer_unaligned_store16(void *p, uint16_t x);
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void __sanitizer_unaligned_store32(void *p, uint32_t x);
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void __sanitizer_unaligned_store64(void *p, uint64_t x);
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// Annotate the current state of a contiguous container, such as
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// std::vector, std::string or similar.
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// A contiguous container is a container that keeps all of its elements
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// in a contiguous region of memory. The container owns the region of memory
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// [beg, end); the memory [beg, mid) is used to store the current elements
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// and the memory [mid, end) is reserved for future elements;
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// beg <= mid <= end. For example, in "std::vector<> v"
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// beg = &v[0];
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// end = beg + v.capacity() * sizeof(v[0]);
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// mid = beg + v.size() * sizeof(v[0]);
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//
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// This annotation tells the Sanitizer tool about the current state of the
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// container so that the tool can report errors when memory from [mid, end)
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// is accessed. Insert this annotation into methods like push_back/pop_back.
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// Supply the old and the new values of mid (old_mid/new_mid).
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// In the initial state mid == end and so should be the final
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// state when the container is destroyed or when it reallocates the storage.
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//
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// Use with caution and don't use for anything other than vector-like classes.
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//
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// For AddressSanitizer, 'beg' should be 8-aligned and 'end' should
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// be either 8-aligned or it should point to the end of a separate heap-,
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// stack-, or global- allocated buffer. I.e. the following will not work:
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// int64_t x[2]; // 16 bytes, 8-aligned.
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// char *beg = (char *)&x[0];
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// char *end = beg + 12; // Not 8 aligned, not the end of the buffer.
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// This however will work fine:
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// int32_t x[3]; // 12 bytes, but 8-aligned under AddressSanitizer.
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// char *beg = (char*)&x[0];
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// char *end = beg + 12; // Not 8-aligned, but is the end of the buffer.
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void __sanitizer_annotate_contiguous_container(const void *beg,
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const void *end,
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const void *old_mid,
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const void *new_mid);
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// Returns true if the contiguous container [beg, end) is properly poisoned
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// (e.g. with __sanitizer_annotate_contiguous_container), i.e. if
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// - [beg, mid) is addressable,
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// - [mid, end) is unaddressable.
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// Full verification requires O(end-beg) time; this function tries to avoid
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// such complexity by touching only parts of the container around beg/mid/end.
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int __sanitizer_verify_contiguous_container(const void *beg, const void *mid,
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const void *end);
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// Similar to __sanitizer_verify_contiguous_container but returns the address
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// of the first improperly poisoned byte otherwise. Returns null if the area
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// is poisoned properly.
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const void *__sanitizer_contiguous_container_find_bad_address(
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const void *beg, const void *mid, const void *end);
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// Print the stack trace leading to this call. Useful for debugging user code.
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void __sanitizer_print_stack_trace();
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// Symbolizes the supplied 'pc' using the format string 'fmt'.
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// Outputs at most 'out_buf_size' bytes into 'out_buf'.
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// The format syntax is described in
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// lib/sanitizer_common/sanitizer_stacktrace_printer.h.
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void __sanitizer_symbolize_pc(void *pc, const char *fmt, char *out_buf,
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size_t out_buf_size);
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// Same as __sanitizer_symbolize_pc, but for data section (i.e. globals).
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void __sanitizer_symbolize_global(void *data_ptr, const char *fmt,
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char *out_buf, size_t out_buf_size);
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// Sets the callback to be called right before death on error.
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// Passing 0 will unset the callback.
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void __sanitizer_set_death_callback(void (*callback)(void));
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// Interceptor hooks.
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// Whenever a libc function interceptor is called it checks if the
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// corresponding weak hook is defined, and it so -- calls it.
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// The primary use case is data-flow-guided fuzzing, where the fuzzer needs
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// to know what is being passed to libc functions, e.g. memcmp.
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// FIXME: implement more hooks.
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void __sanitizer_weak_hook_memcmp(void *called_pc, const void *s1,
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const void *s2, size_t n, int result);
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void __sanitizer_weak_hook_strncmp(void *called_pc, const char *s1,
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const char *s2, size_t n, int result);
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void __sanitizer_weak_hook_strncasecmp(void *called_pc, const char *s1,
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const char *s2, size_t n, int result);
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void __sanitizer_weak_hook_strcmp(void *called_pc, const char *s1,
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const char *s2, int result);
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void __sanitizer_weak_hook_strcasecmp(void *called_pc, const char *s1,
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const char *s2, int result);
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void __sanitizer_weak_hook_strstr(void *called_pc, const char *s1,
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const char *s2, char *result);
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void __sanitizer_weak_hook_strcasestr(void *called_pc, const char *s1,
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const char *s2, char *result);
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void __sanitizer_weak_hook_memmem(void *called_pc,
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const void *s1, size_t len1,
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const void *s2, size_t len2, void *result);
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// Prints stack traces for all live heap allocations ordered by total
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// allocation size until `top_percent` of total live heap is shown.
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// `top_percent` should be between 1 and 100.
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// At most `max_number_of_contexts` contexts (stack traces) is printed.
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// Experimental feature currently available only with asan on Linux/x86_64.
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void __sanitizer_print_memory_profile(size_t top_percent,
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size_t max_number_of_contexts);
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// Fiber annotation interface.
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// Before switching to a different stack, one must call
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// __sanitizer_start_switch_fiber with a pointer to the bottom of the
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// destination stack and its size. When code starts running on the new stack,
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// it must call __sanitizer_finish_switch_fiber to finalize the switch.
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// The start_switch function takes a void** to store the current fake stack if
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// there is one (it is needed when detect_stack_use_after_return is enabled).
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// When restoring a stack, this pointer must be given to the finish_switch
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// function. In most cases, this void* can be stored on the stack just before
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// switching. When leaving a fiber definitely, null must be passed as first
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// argument to the start_switch function so that the fake stack is destroyed.
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// If you do not want support for stack use-after-return detection, you can
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// always pass null to these two functions.
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// Note that the fake stack mechanism is disabled during fiber switch, so if a
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// signal callback runs during the switch, it will not benefit from the stack
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// use-after-return detection.
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void __sanitizer_start_switch_fiber(void **fake_stack_save,
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const void *bottom, size_t size);
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void __sanitizer_finish_switch_fiber(void *fake_stack_save,
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const void **bottom_old,
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size_t *size_old);
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// Get full module name and calculate pc offset within it.
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// Returns 1 if pc belongs to some module, 0 if module was not found.
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int __sanitizer_get_module_and_offset_for_pc(void *pc, char *module_path,
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size_t module_path_len,
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void **pc_offset);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // SANITIZER_COMMON_INTERFACE_DEFS_H
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