Update compiler-rt to LLVM 14 (#16991)

Author: sbc100

ChangeLog.md

@@ -26,6 +26,7 @@ See docs/process.md for more on how version tagging works.
   wide under `wasm64`. (#16938)
 - The `EM_BUILD_VERBOSE` environment variable only effects test code these days
   and therefore was renamed to `EMTEST_BUILD_VERBOSE`. (#16904)
+- compiler-rt code updated to LLVM 14. (#16991)
 
 3.1.10 - 05/02/2022
 -------------------

system/lib/compiler-rt/include/sanitizer/asan_interface.h

@@ -316,7 +316,7 @@ void *__asan_addr_is_in_fake_stack(void *fake_stack, void *addr, void **beg,
 void __asan_handle_no_return(void);
 
 /// Update allocation stack trace for the given allocation to the current stack
-/// trace. Returns 1 if successfull, 0 if not.
+/// trace. Returns 1 if successful, 0 if not.
 int __asan_update_allocation_context(void* addr);
 
 #ifdef __cplusplus

system/lib/compiler-rt/include/sanitizer/common_interface_defs.h

@@ -28,7 +28,7 @@ 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_sandobx_on_notify(). This field has no
+  // 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
@@ -211,6 +211,15 @@ void __sanitizer_symbolize_pc(void *pc, const char *fmt, char *out_buf,
 // 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);
+// Determine the return address.
+#if !defined(_MSC_VER) || defined(__clang__)
+#define __sanitizer_return_address()                                           \
+  __builtin_extract_return_addr(__builtin_return_address(0))
+#else
+extern "C" void *_ReturnAddress(void);
+#pragma intrinsic(_ReturnAddress)
+#define __sanitizer_return_address() _ReturnAddress()
+#endif
 
 /// Sets the callback to be called immediately before death on error.
 ///

system/lib/compiler-rt/include/sanitizer/dfsan_interface.h

@@ -27,6 +27,10 @@ typedef uint32_t dfsan_origin;
 /// Signature of the callback argument to dfsan_set_write_callback().
 typedef void (*dfsan_write_callback_t)(int fd, const void *buf, size_t count);
 
+/// Signature of the callback argument to dfsan_set_conditional_callback().
+typedef void (*dfsan_conditional_callback_t)(dfsan_label label,
+                                             dfsan_origin origin);
+
 /// Computes the union of \c l1 and \c l2, resulting in a union label.
 dfsan_label dfsan_union(dfsan_label l1, dfsan_label l2);
 
@@ -54,6 +58,10 @@ dfsan_origin dfsan_get_origin(long data);
 /// Retrieves the label associated with the data at the given address.
 dfsan_label dfsan_read_label(const void *addr, size_t size);
 
+/// Return the origin associated with the first taint byte in the size bytes
+/// from the address addr.
+dfsan_origin dfsan_read_origin_of_first_taint(const void *addr, size_t size);
+
 /// Returns whether the given label label contains the label elem.
 int dfsan_has_label(dfsan_label label, dfsan_label elem);
 
@@ -70,6 +78,19 @@ void dfsan_flush(void);
 /// callback executes.  Pass in NULL to remove any callback.
 void dfsan_set_write_callback(dfsan_write_callback_t labeled_write_callback);
 
+/// Sets a callback to be invoked on any conditional expressions which have a
+/// taint label set. This can be used to find where tainted data influences
+/// the behavior of the program.
+/// These callbacks will only be added when -dfsan-conditional-callbacks=true.
+void dfsan_set_conditional_callback(dfsan_conditional_callback_t callback);
+
+/// Conditional expressions occur during signal handlers.
+/// Making callbacks that handle signals well is tricky, so when
+/// -dfsan-conditional-callbacks=true, conditional expressions used in signal
+/// handlers will add the labels they see into a global (bitwise-or together).
+/// This function returns all label bits seen in signal handler conditions.
+dfsan_label dfsan_get_labels_in_signal_conditional();
+
 /// Interceptor hooks.
 /// Whenever a dfsan's custom function is called the corresponding
 /// hook is called it non-zero. The hooks should be defined by the user.
@@ -87,6 +108,9 @@ void dfsan_weak_hook_strncmp(void *caller_pc, const char *s1, const char *s2,
 /// prints description at the beginning of the trace. If origin tracking is not
 /// on, or the address is not labeled, it prints nothing.
 void dfsan_print_origin_trace(const void *addr, const char *description);
+/// As above, but use an origin id from dfsan_get_origin() instead of address.
+/// Does not include header line with taint label and address information.
+void dfsan_print_origin_id_trace(dfsan_origin origin);
 
 /// Prints the origin trace of the label at the address \p addr to a
 /// pre-allocated output buffer. If origin tracking is not on, or the address is
@@ -124,6 +148,10 @@ void dfsan_print_origin_trace(const void *addr, const char *description);
 /// return value is not less than \p out_buf_size.
 size_t dfsan_sprint_origin_trace(const void *addr, const char *description,
                                  char *out_buf, size_t out_buf_size);
+/// As above, but use an origin id from dfsan_get_origin() instead of address.
+/// Does not include header line with taint label and address information.
+size_t dfsan_sprint_origin_id_trace(dfsan_origin origin, char *out_buf,
+                                    size_t out_buf_size);
 
 /// Prints the stack trace leading to this call to a pre-allocated output
 /// buffer.
@@ -150,8 +178,7 @@ int dfsan_get_track_origins(void);
 #ifdef __cplusplus
 }  // extern "C"
 
-template <typename T>
-void dfsan_set_label(dfsan_label label, T &data) { // NOLINT
+template <typename T> void dfsan_set_label(dfsan_label label, T &data) {
   dfsan_set_label(label, (void *)&data, sizeof(T));
 }