| /* |
| * |
| * Copyright 2016 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include "src/core/lib/transport/error_utils.h" |
| |
| #include <grpc/support/string_util.h> |
| #include "src/core/lib/iomgr/error_internal.h" |
| #include "src/core/lib/slice/slice_internal.h" |
| #include "src/core/lib/transport/status_conversion.h" |
| |
| static grpc_error* recursively_find_error_with_field(grpc_error* error, |
| grpc_error_ints which) { |
| intptr_t unused; |
| // If the error itself has a status code, return it. |
| if (grpc_error_get_int(error, which, &unused)) { |
| return error; |
| } |
| if (grpc_error_is_special(error)) return nullptr; |
| // Otherwise, search through its children. |
| uint8_t slot = error->first_err; |
| while (slot != UINT8_MAX) { |
| grpc_linked_error* lerr = |
| reinterpret_cast<grpc_linked_error*>(error->arena + slot); |
| grpc_error* result = recursively_find_error_with_field(lerr->err, which); |
| if (result) return result; |
| slot = lerr->next; |
| } |
| return nullptr; |
| } |
| |
| void grpc_error_get_status(grpc_error* error, grpc_millis deadline, |
| grpc_status_code* code, grpc_slice* slice, |
| grpc_http2_error_code* http_error, |
| const char** error_string) { |
| // Fast path: We expect no error. |
| if (GPR_LIKELY(error == GRPC_ERROR_NONE)) { |
| if (code != nullptr) *code = GRPC_STATUS_OK; |
| if (slice != nullptr) { |
| // Normally, we call grpc_error_get_str( |
| // error, GRPC_ERROR_STR_GRPC_MESSAGE, slice). |
| // We can fastpath since we know that: |
| // 1) Error is null |
| // 2) which == GRPC_ERROR_STR_GRPC_MESSAGE |
| // 3) The resulting slice is statically known. |
| // 4) Said resulting slice is of length 0 (""). |
| // This means 3 movs, instead of 10s of instructions and a strlen. |
| *slice = grpc_core::ExternallyManagedSlice(""); |
| } |
| if (http_error != nullptr) { |
| *http_error = GRPC_HTTP2_NO_ERROR; |
| } |
| return; |
| } |
| |
| // Start with the parent error and recurse through the tree of children |
| // until we find the first one that has a status code. |
| grpc_error* found_error = |
| recursively_find_error_with_field(error, GRPC_ERROR_INT_GRPC_STATUS); |
| if (found_error == nullptr) { |
| /// If no grpc-status exists, retry through the tree to find a http2 error |
| /// code |
| found_error = |
| recursively_find_error_with_field(error, GRPC_ERROR_INT_HTTP2_ERROR); |
| } |
| |
| // If we found an error with a status code above, use that; otherwise, |
| // fall back to using the parent error. |
| if (found_error == nullptr) found_error = error; |
| |
| grpc_status_code status = GRPC_STATUS_UNKNOWN; |
| intptr_t integer; |
| if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS, &integer)) { |
| status = static_cast<grpc_status_code>(integer); |
| } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR, |
| &integer)) { |
| status = grpc_http2_error_to_grpc_status( |
| static_cast<grpc_http2_error_code>(integer), deadline); |
| } |
| if (code != nullptr) *code = status; |
| |
| if (error_string != nullptr && status != GRPC_STATUS_OK) { |
| *error_string = gpr_strdup(grpc_error_string(error)); |
| } |
| |
| if (http_error != nullptr) { |
| if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR, &integer)) { |
| *http_error = static_cast<grpc_http2_error_code>(integer); |
| } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS, |
| &integer)) { |
| *http_error = |
| grpc_status_to_http2_error(static_cast<grpc_status_code>(integer)); |
| } else { |
| *http_error = found_error == GRPC_ERROR_NONE ? GRPC_HTTP2_NO_ERROR |
| : GRPC_HTTP2_INTERNAL_ERROR; |
| } |
| } |
| |
| // If the error has a status message, use it. Otherwise, fall back to |
| // the error description. |
| if (slice != nullptr) { |
| if (!grpc_error_get_str(found_error, GRPC_ERROR_STR_GRPC_MESSAGE, slice)) { |
| if (!grpc_error_get_str(found_error, GRPC_ERROR_STR_DESCRIPTION, slice)) { |
| *slice = grpc_slice_from_static_string("unknown error"); |
| } |
| } |
| } |
| } |
| |
| absl::Status grpc_error_to_absl_status(grpc_error* error) { |
| grpc_status_code status; |
| // TODO(yashykt): This should be updated once we decide on how to use the |
| // absl::Status payload to capture all the contents of grpc_error. |
| grpc_slice message; |
| grpc_error_get_status(error, GRPC_MILLIS_INF_FUTURE, &status, &message, |
| nullptr /* http_error */, nullptr /* error_string */); |
| return absl::Status(static_cast<absl::StatusCode>(status), |
| absl::string_view(reinterpret_cast<const char*>( |
| GRPC_SLICE_START_PTR(message)), |
| GRPC_SLICE_LENGTH(message))); |
| } |
| |
| bool grpc_error_has_clear_grpc_status(grpc_error* error) { |
| intptr_t unused; |
| if (grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, &unused)) { |
| return true; |
| } |
| uint8_t slot = error->first_err; |
| while (slot != UINT8_MAX) { |
| grpc_linked_error* lerr = |
| reinterpret_cast<grpc_linked_error*>(error->arena + slot); |
| if (grpc_error_has_clear_grpc_status(lerr->err)) { |
| return true; |
| } |
| slot = lerr->next; |
| } |
| return false; |
| } |