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// Copyright 2019 Google
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <dispatch/dispatch.h>
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#include "Crashlytics/Crashlytics/Helpers/FIRCLSInternalLogging.h"
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#include "Crashlytics/Crashlytics/Components/FIRCLSContext.h"
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#include "Crashlytics/Crashlytics/Components/FIRCLSGlobals.h"
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#include "Crashlytics/Crashlytics/Helpers/FIRCLSUtility.h"
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void FIRCLSSDKFileLog(FIRCLSInternalLogLevel level, const char* format, ...) {
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if (!_firclsContext.readonly || !_firclsContext.writable) {
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return;
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}
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const char* path = _firclsContext.readonly->logPath;
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if (!FIRCLSIsValidPointer(path)) {
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return;
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}
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if (_firclsContext.writable->internalLogging.logLevel > level) {
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return;
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}
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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if (_firclsContext.writable->internalLogging.logFd == -1) {
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_firclsContext.writable->internalLogging.logFd = open(path, O_WRONLY | O_CREAT | O_APPEND, 0644);
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}
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});
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const int fd = _firclsContext.writable->internalLogging.logFd;
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if (fd < 0) {
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return;
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}
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va_list args;
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va_start(args, format);
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#if DEBUG && 0
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// It's nice to use printf here, so all the formatting works. However, its possible to hit a
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// deadlock if you call vfprintf in a crash handler. So, this code is handy to keep, just in case,
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// if there's a really tough thing to debug.
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FILE* file = fopen(path, "a+");
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vfprintf(file, format, args);
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fclose(file);
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#else
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size_t formatLength = strlen(format);
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for (size_t idx = 0; idx < formatLength; ++idx) {
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if (format[idx] != '%') {
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write(fd, &format[idx], 1);
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continue;
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}
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idx++; // move to the format char
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switch (format[idx]) {
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case 'd': {
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int value = va_arg(args, int);
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FIRCLSFileFDWriteInt64(fd, value);
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} break;
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case 'u': {
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uint32_t value = va_arg(args, uint32_t);
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FIRCLSFileFDWriteUInt64(fd, value, false);
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} break;
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case 'p': {
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uintptr_t value = va_arg(args, uintptr_t);
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write(fd, "0x", 2);
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FIRCLSFileFDWriteUInt64(fd, value, true);
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} break;
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case 's': {
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const char* string = va_arg(args, const char*);
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if (!string) {
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string = "(null)";
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}
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write(fd, string, strlen(string));
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} break;
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case 'x': {
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unsigned int value = va_arg(args, unsigned int);
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FIRCLSFileFDWriteUInt64(fd, value, true);
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} break;
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default:
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// unhandled, back up to write out the percent + the format char
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write(fd, &format[idx - 1], 2);
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break;
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}
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}
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#endif
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va_end(args);
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}
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