1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/// FFI bindings for the AddressSanitizer interface.
///
/// For more information about AddressSanitizer, see
/// https://clang.llvm.org/docs/AddressSanitizer.html.
use std::option::Option;
use std::os::raw::{c_char, c_int, c_void};
extern "C" {
/// Marks a memory region (<c>[addr, addr+size)</c>) as unaddressable.
///
/// This memory must be previously allocated by your program. Instrumented
/// code is forbidden from accessing addresses in this region until it is
/// unpoisoned. This function is not guaranteed to poison the entire region -
/// it could poison only a subregion of <c>[addr, addr+size)</c> due to ASan
/// alignment restrictions.
///
/// \note This function is not thread-safe because no two threads can poison or
/// unpoison memory in the same memory region simultaneously.
///
/// \param addr Start of memory region.
/// \param size Size of memory region.
pub fn __asan_poison_memory_region(addr: *const c_void, size: usize);
/// Marks a memory region (<c>[addr, addr+size)</c>) as addressable.
///
/// This memory must be previously allocated by your program. Accessing
/// addresses in this region is allowed until this region is poisoned again.
/// This function could unpoison a super-region of <c>[addr, addr+size)</c> due
/// to ASan alignment restrictions.
///
/// \note This function is not thread-safe because no two threads can
/// poison or unpoison memory in the same memory region simultaneously.
///
/// \param addr Start of memory region.
/// \param size Size of memory region.
pub fn __asan_unpoison_memory_region(addr: *const c_void, size: usize);
/// Checks if an address is poisoned.
///
/// Returns 1 if <c><i>addr</i></c> is poisoned (that is, 1-byte read/write
/// access to this address would result in an error report from ASan).
/// Otherwise returns 0.
///
/// \param addr Address to check.
///
/// \retval 1 Address is poisoned.
/// \retval 0 Address is not poisoned.
pub fn __asan_address_is_poisoned(addr: *const c_void) -> c_int;
/// Checks if a region is poisoned.
///
/// If at least one byte in <c>[beg, beg+size)</c> is poisoned, returns the
/// address of the first such byte. Otherwise returns 0.
///
/// \param beg Start of memory region.
/// \param size Start of memory region.
/// \returns Address of first poisoned byte.
pub fn __asan_region_is_poisoned(beg: *mut c_void, size: usize) -> *mut c_void;
/// Describes an address (useful for calling from the debugger).
///
/// Prints the description of <c><i>addr</i></c>.
///
/// \param addr Address to describe.
pub fn __asan_describe_address(addr: *mut c_void);
/// Checks if an error has been or is being reported (useful for calling from
/// the debugger to get information about an ASan error).
///
/// Returns 1 if an error has been (or is being) reported. Otherwise returns 0.
///
/// \returns 1 if an error has been (or is being) reported. Otherwise returns
/// 0.
pub fn __asan_report_present() -> c_int;
/// Gets the PC (program counter) register value of an ASan error (useful for
/// calling from the debugger).
///
/// Returns PC if an error has been (or is being) reported.
/// Otherwise returns 0.
///
/// \returns PC value.
pub fn __asan_get_report_pc() -> *mut c_void;
/// Gets the BP (base pointer) register value of an ASan error (useful for
/// calling from the debugger).
///
/// Returns BP if an error has been (or is being) reported.
/// Otherwise returns 0.
///
/// \returns BP value.
pub fn __asan_get_report_bp() -> *mut c_void;
/// Gets the SP (stack pointer) register value of an ASan error (useful for
/// calling from the debugger).
///
/// If an error has been (or is being) reported, returns SP.
/// Otherwise returns 0.
///
/// \returns SP value.
pub fn __asan_get_report_sp() -> *mut c_void;
/// Gets the address of the report buffer of an ASan error (useful for calling
/// from the debugger).
///
/// Returns the address of the report buffer if an error has been (or is being)
/// reported. Otherwise returns 0.
///
/// \returns Address of report buffer.
pub fn __asan_get_report_address() -> *mut c_void;
/// Gets access type of an ASan error (useful for calling from the debugger).
///
/// Returns access type (read or write) if an error has been (or is being)
/// reported. Otherwise returns 0.
///
/// \returns Access type (0 = read, 1 = write).
pub fn __asan_get_report_access_type() -> c_int;
/// Gets access size of an ASan error (useful for calling from the debugger).
///
/// Returns access size if an error has been (or is being) reported. Otherwise
/// returns 0.
///
/// \returns Access size in bytes.
pub fn __asan_get_report_access_size() -> usize;
/// Gets the bug description of an ASan error (useful for calling from a
/// debugger).
///
/// \returns Returns a bug description if an error has been (or is being)
/// reported - for example, "heap-use-after-free". Otherwise returns an empty
/// string.
pub fn __asan_get_report_description() -> *const c_char;
/// Gets information about a pointer (useful for calling from the debugger).
///
/// Returns the category of the given pointer as a constant string.
/// Possible return values are <c>global</c>, <c>stack</c>, <c>stack-fake</c>,
/// <c>heap</c>, <c>heap-invalid</c>, <c>shadow-low</c>, <c>shadow-gap</c>,
/// <c>shadow-high</c>, and <c>unknown</c>.
///
/// If the return value is <c>global</c> or <c>stack</c>, tries to also return
/// the variable name, address, and size. If the return value is <c>heap</c>,
/// tries to return the chunk address and size. <c><i>name</i></c> should point
/// to an allocated buffer of size <c><i>name_size</i></c>.
///
/// \param addr Address to locate.
/// \param name Buffer to store the variable's name.
/// \param name_size Size in bytes of the variable's name buffer.
/// \param[out] region_address Address of the region.
/// \param[out] region_size Size of the region in bytes.
///
/// \returns Returns the category of the given pointer as a constant string.
pub fn __asan_locate_address(
addr: *mut c_void,
name: *mut c_char,
name_size: usize,
region_address: *mut *mut c_void,
region_size: *mut usize,
) -> *const c_char;
/// Gets the allocation stack trace and thread ID for a heap address (useful
/// for calling from the debugger).
///
/// Stores up to <c><i>size</i></c> frames in <c><i>trace</i></c>. Returns
/// the number of stored frames or 0 on error.
///
/// \param addr A heap address.
/// \param trace A buffer to store the stack trace.
/// \param size Size in bytes of the trace buffer.
/// \param[out] thread_id The thread ID of the address.
///
/// \returns Returns the number of stored frames or 0 on error.
pub fn __asan_get_alloc_stack(
addr: *mut c_void,
trace: *mut *mut c_void,
size: usize,
thread_id: *mut c_int,
) -> usize;
/// Gets the free stack trace and thread ID for a heap address (useful for
/// calling from the debugger).
///
/// Stores up to <c><i>size</i></c> frames in <c><i>trace</i></c>. Returns
/// the number of stored frames or 0 on error.
///
/// \param addr A heap address.
/// \param trace A buffer to store the stack trace.
/// \param size Size in bytes of the trace buffer.
/// \param[out] thread_id The thread ID of the address.
///
/// \returns Returns the number of stored frames or 0 on error.
pub fn __asan_get_free_stack(
addr: *mut c_void,
trace: *mut *mut c_void,
size: usize,
thread_id: *mut c_int,
) -> usize;
/// Gets the current shadow memory mapping (useful for calling from the
/// debugger).
///
/// \param[out] shadow_scale Shadow scale value.
/// \param[out] shadow_offset Offset value.
pub fn __asan_get_shadow_mapping(shadow_scale: *mut usize, shadow_offset: *mut usize);
/// This is an internal function that is called to report an error. However,
/// it is still a part of the interface because you might want to set a
/// breakpoint on this function in the debugger.
///
/// \param pc <c><i>pc</i></c> value of the ASan error.
/// \param bp <c><i>bp</i></c> value of the ASan error.
/// \param sp <c><i>sp</i></c> value of the ASan error.
/// \param addr Address of the ASan error.
/// \param is_write True if the error is a write error; false otherwise.
/// \param access_size Size of the memory access of the ASan error.
pub fn __asan_report_error(
pc: *mut c_void,
bp: *mut c_void,
sp: *mut c_void,
addr: *mut c_void,
is_write: c_int,
access_size: usize,
);
pub fn __asan_set_death_callback(callback: Option<unsafe extern "C" fn()>);
/// Sets the callback function to be called during ASan error reporting.
///
/// The callback provides a string pointer to the report.
///
/// \param callback User-provided function.
pub fn __asan_set_error_report_callback(
callback: Option<unsafe extern "C" fn(arg1: *const c_char)>,
);
/// User-provided callback on ASan errors.
///
/// You can provide a function that would be called immediately when ASan
/// detects an error. This is useful in cases when ASan detects an error but
/// your program crashes before the ASan report is printed.
pub fn __asan_on_error();
/// Prints accumulated statistics to <c>stderr</c> (useful for calling from the
/// debugger).
pub fn __asan_print_accumulated_stats();
/// User-provided default option settings.
///
/// You can provide your own implementation of this function to return a string
/// containing ASan runtime options (for example,
/// <c>verbosity=1:halt_on_error=0</c>).
///
/// \returns Default options string.
pub fn __asan_default_options() -> *const c_char;
/// Gets an opaque handler to the current thread's fake stack.
///
/// Returns an opaque handler to be used by
/// <c>__asan_addr_is_in_fake_stack()</c>. Returns NULL if the current thread
/// does not have a fake stack.
///
/// \returns An opaque handler to the fake stack or NULL.
pub fn __asan_get_current_fake_stack() -> *mut c_void;
/// Checks if an address belongs to a given fake stack.
///
/// If <c><i>fake_stack</i></c> is non-NULL and <c><i>addr</i></c> belongs to a
/// fake frame in <c><i>fake_stack</i></c>, returns the address of the real
/// stack that corresponds to the fake frame and sets <c><i>beg</i></c> and
/// <c><i>end</i></c> to the boundaries of this fake frame. Otherwise returns
/// NULL and does not touch <c><i>beg</i></c> and <c><i>end</i></c>.
///
/// If <c><i>beg</i></c> or <c><i>end</i></c> are NULL, they are not touched.
///
/// \note This function can be called from a thread other than the owner of
/// <c><i>fake_stack</i></c>, but the owner thread needs to be alive.
///
/// \param fake_stack An opaque handler to a fake stack.
/// \param addr Address to test.
/// \param[out] beg Beginning of fake frame.
/// \param[out] end End of fake frame.
/// \returns Stack address or NULL.
pub fn __asan_addr_is_in_fake_stack(
fake_stack: *mut c_void,
addr: *mut c_void,
beg: *mut *mut c_void,
end: *mut *mut c_void,
) -> *mut c_void;
/// Performs shadow memory cleanup of the current thread's stack before a
/// function marked with the <c>[[noreturn]]</c> attribute is called.
///
/// To avoid false positives on the stack, must be called before no-return
/// functions like <c>_exit()</c> and <c>execl()</c>.
pub fn __asan_handle_no_return();
/// Update allocation stack trace for the given allocation to the current stack
/// trace. Returns 1 if successful, 0 if not.
pub fn __asan_update_allocation_context(addr: *mut c_void) -> c_int;
}