\n| \u8fdc\u7a0b\u8c03\u8bd5<\/td>\n | \u9644\u52a0\u8fdb\u7a0b<\/td>\n | jdb -attach hostname:8000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u65e5\u5fd7\u5206\u6790\u7684\u9ec4\u91d1\u6cd5\u5219<\/p>\n # \u7ed3\u6784\u5316\u65e5\u5fd7\u793a\u4f8b（ELK\u53cb\u597d\u683c\u5f0f）
\nimport json
\nimport logging<\/p>\n class StructuredFormatter(logging.Formatter):
\n def format(self, record):
\n log_obj = {
\n "timestamp": self.formatTime(record),
\n "level": record.levelname,
\n "message": record.getMessage(),
\n "context": {
\n "trace_id": getattr(record, 'trace_id', 'N\/A'),
\n "user_id": getattr(record, 'user_id', 'N\/A'),
\n "file": record.filename,
\n "line": record.lineno
\n }
\n }
\n return json.dumps(log_obj)<\/p>\n # \u4f7f\u7528：\u4fbf\u4e8e\u540e\u7eed\u7528Kibana\u8fdb\u884c\u5f02\u5e38\u6a21\u5f0f\u5206\u6790 <\/p>\n 2.3 \u81ea\u52a8\u5316\u6d4b\u8bd5\u8f85\u52a9\u5b9a\u4f4d<\/h4>\n\u5355\u5143\u6d4b\u8bd5\u7684\u8fb9\u754c\u7528\u4f8b\u8bbe\u8ba1<\/p>\n \/\/ \u4f7f\u7528JUnit 5\u7684\u53c2\u6570\u5316\u6d4b\u8bd5\u8986\u76d6\u8fb9\u754c\u6761\u4ef6
\n@ParameterizedTest
\n@CsvSource({
\n "null, 0, \u975e\u6cd5\u8f93\u5165", \/\/ \u7a7a\u6307\u9488\u8fb9\u754c
\n "'', 0, \u7a7a\u5b57\u7b26\u4e32", \/\/ \u957f\u5ea6\u8fb9\u754c
\n "'a'.repeat(10000), 10000, \u8d85\u957f\u8f93\u5165", \/\/ \u6027\u80fd\u8fb9\u754c
\n "'<script>alert(1)<\/script>', 0, XSS\u5c1d\u8bd5" \/\/ \u5b89\u5168\u8fb9\u754c
\n})
\nvoid testInputValidation(String input, int expectedLength, String description) {
\n assertDoesNotThrow(() -> validator.validate(input));
\n} <\/p>\n
\n\u4e09\u3001\u5178\u578bBUG\u6848\u4f8b\u6df1\u5ea6\u89e3\u6790<\/h3>\n3.1 \u5185\u5b58\u6cc4\u6f0f：\u4eceC++\u5230Java\u7684\u8de8\u8bed\u8a00\u5bf9\u6bd4<\/h4>\nC++\u6848\u4f8b：\u5faa\u73af\u5f15\u7528\u5bfc\u81f4\u7684shared_ptr\u6cc4\u6f0f<\/p>\n #include <memory>
\n#include <iostream><\/p>\n struct Node {
\n std::shared_ptr<Node> next; \/\/ \u5371\u9669：\u5faa\u73af\u5f15\u7528
\n int data;
\n ~Node() { std::cout << "Node destroyed\\\\n"; }
\n};<\/p>\n int main() {
\n auto node1 = std::make_shared<Node>();
\n auto node2 = std::make_shared<Node>();
\n node1->next = node2;
\n node2->next = node1; \/\/ \u5faa\u73af\u5f15\u7528！\u5f15\u7528\u8ba1\u6570\u6c38\u4e0d\u4e3a0<\/p>\n \/\/ \u89e3\u51b3\u65b9\u6848：\u5c06\u5176\u4e2d\u4e00\u4e2a\u6539\u4e3aweak_ptr
\n \/\/ std::weak_ptr<Node> next;
\n} <\/p>\n \u68c0\u6d4b\u547d\u4ee4：<\/p>\n # \u4f7f\u7528AddressSanitizer\u7f16\u8bd1
\ng++ -fsanitize=address -g leak.cpp -o leak_test
\n.\/leak_test # \u81ea\u52a8\u62a5\u544a\u6cc4\u6f0f\u70b9<\/p>\n # \u6216\u4f7f\u7528valgrind
\nvalgrind –tool=memcheck –leak-check=full –show-leak-kinds=all .\/leak_test <\/p>\n Java\u6848\u4f8b：ThreadLocal\u672a\u6e05\u7406<\/p>\n public class MemoryLeakExample {
\n private static final ThreadLocal<byte[]> buffer =
\n ThreadLocal.withInitial(() -> new byte[1024 * 1024]); \/\/ 1MB per thread<\/p>\n public void process() {
\n byte[] buf = buffer.get(); \/\/ \u4f7f\u7528\u540e\u672aremove()
\n \/\/ \u7ebf\u7a0b\u6c60\u573a\u666f\u4e0b，\u7ebf\u7a0b\u590d\u7528\u5bfc\u81f4\u5185\u5b58\u7d2f\u79ef
\n }<\/p>\n \/\/ \u4fee\u590d：\u4f7f\u7528try-finally\u786e\u4fdd\u6e05\u7406
\n public void safeProcess() {
\n byte[] buf = buffer.get();
\n try {
\n \/\/ \u4e1a\u52a1\u903b\u8f91
\n } finally {
\n buffer.remove(); \/\/ \u5173\u952e！
\n }
\n }
\n} <\/p>\n 3.2 \u5e76\u53d1\u7ade\u6001\u6761\u4ef6：\u591a\u7ebf\u7a0b\u8c03\u8bd5\u7b56\u7565<\/h4>\n\u7ecf\u5178\u6848\u4f8b：\u53cc\u91cd\u68c0\u67e5\u9501\u5b9a\u7684\u9690\u60a3<\/p>\n \/\/ \u9519\u8bef\u5b9e\u73b0（\u53ef\u80fd\u8fd4\u56de\u672a\u5b8c\u5168\u6784\u9020\u7684\u5bf9\u8c61）
\npublic class Singleton {
\n private static Singleton instance;
\n public static Singleton getInstance() {
\n if (instance == null) {
\n synchronized (Singleton.class) {
\n if (instance == null) {
\n instance = new Singleton(); \/\/ \u6307\u4ee4\u91cd\u6392\u5e8f\u98ce\u9669！
\n }
\n }
\n }
\n return instance;
\n }
\n}<\/p>\n \/\/ \u6b63\u786e\u5b9e\u73b0：volatile + \u53cc\u91cd\u68c0\u67e5
\nprivate static volatile Singleton instance; <\/p>\n \u8c03\u8bd5\u6280\u5de7：\u4f7f\u7528ThreadSanitizer<\/p>\n # \u7f16\u8bd1\u65f6\u542f\u7528
\ngcc -fsanitize=thread -g race.c -o race_test
\n.\/race_test # \u81ea\u52a8\u68c0\u6d4b\u6570\u636e\u7ade\u4e89 <\/p>\n 3.3 Web\u5b89\u5168\u6f0f\u6d1e：CTFHub\u5b9e\u6218\u590d\u76d8<\/h4>\n\u57fa\u4e8e\u4f60\u4e4b\u524d\u7684CTFHub\u7ecf\u9a8c，\u8fd9\u91cc\u8865\u5145\u4e00\u4e2a\u6587\u4ef6\u4e0a\u4f20%00\u622a\u65ad\u7684\u5b8c\u6574\u5206\u6790：<\/p>\n \u6f0f\u6d1e\u539f\u7406<\/p>\n \/\/ \u6709\u95ee\u9898\u7684\u4ee3\u7801（PHP 5.2\u53ca\u4ee5\u4e0b）
\n$filename = $_GET['filename']; \/\/ \u7528\u6237\u53ef\u63a7：shell.php%00.jpg
\n$ext = substr($filename, strrpos($filename, '.') + 1); \/\/ \u83b7\u53d6\u5230jpg
\nmove_uploaded_file($tmp_name, "\/uploads\/" . $filename); \/\/ %00\u622a\u65ad\u751f\u6548！
\n\/\/ \u5b9e\u9645\u4fdd\u5b58\u4e3a：shell.php（.jpg\u88ab\u622a\u65ad） <\/p>\n \u5229\u7528\u6b65\u9aa4<\/p>\n \n\u4e0a\u4f20\u6b63\u5e38\u56fe\u7247\u4f5c\u4e3a\u8f7d\u4f53<\/p>\n<\/li>\n \n\u5728filename\u53c2\u6570\u4e2d\u63d2\u5165%00（URL\u89e3\u7801\u540e\u4e3aNULL\u5b57\u8282）<\/p>\n<\/li>\n \n\u540e\u7aefC\u5b57\u7b26\u4e32\u5904\u7406\u65f6\u9047\u5230\\\\0\u7ec8\u6b62，\u540e\u7eed.jpg\u88ab\u5ffd\u7565<\/p>\n<\/li>\n \n\u6210\u529f\u4e0a\u4f20PHP shell\u5230\u670d\u52a1\u5668<\/p>\n<\/li>\n \u9632\u5fa1\u65b9\u6848<\/p>\n \/\/ \u4f7f\u7528pathinfo()\u800c\u975e\u5b57\u7b26\u4e32\u64cd\u4f5c
\n$info = pathinfo($filename);
\n$ext = strtolower($info['extension']); \/\/ \u4e0d\u53d7%00\u5f71\u54cd<\/p>\n \/\/ \u6216：\u767d\u540d\u5355\u9a8c\u8bc1 + \u91cd\u547d\u540d\u6587\u4ef6
\n$allowed = ['jpg', 'png', 'gif'];
\nif (!in_array($ext, $allowed)) die("Invalid type");
\n$new_name = md5(uniqid()) . '.' . $ext; \/\/ \u5b8c\u5168\u63a7\u5236\u6587\u4ef6\u540d <\/p>\n
\n\u56db\u3001\u5de5\u5177\u94fe\u4e0e\u81ea\u52a8\u5316\u5b9e\u8df5<\/h3>\n4.1 CI\/CD\u4e2d\u7684BUG\u62e6\u622a<\/h4>\nGitLab CI \u5b89\u5168\u626b\u63cf\u6d41\u6c34\u7ebf<\/p>\n stages:
\n – build
\n – test
\n – security
\n – deploy<\/p>\n variables:
\n SONAR_TOKEN: $SONAR_TOKEN
\n SNYK_TOKEN: $SNYK_TOKEN<\/p>\n sast:
\n stage: security
\n image: returntocorp\/semgrep
\n script:
\n – semgrep –config=auto –json –output=semgrep-report.json .
\n artifacts:
\n reports:
\n sast: semgrep-report.json
\n allow_failure: false # \u53d1\u73b0\u9ad8\u5371\u6f0f\u6d1e\u65f6\u963b\u65ad\u6d41\u6c34\u7ebf<\/p>\n dependency_scanning:
\n stage: security
\n image: snyk\/snyk-cli
\n script:
\n – snyk test –json-file-output=snyk-report.json
\n artifacts:
\n reports:
\n dependency_scanning: snyk-report.json <\/p>\n 4.2 Fuzz\u6d4b\u8bd5\u5b9e\u6218<\/h4>\n\u4f7f\u7528AFL\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5<\/p>\n # 1. \u7f16\u8bd1\u76ee\u6807\u7a0b\u5e8f（\u63d2\u6869\u6a21\u5f0f）
\nafl-gcc -o target_fuzz target.c<\/p>\n # 2. \u51c6\u5907\u79cd\u5b50\u8bed\u6599\u5e93
\nmkdir in && echo "seed" > in\/seed.txt<\/p>\n # 3. \u542f\u52a8fuzzing
\nafl-fuzz -i in -o out -m none — .\/target_fuzz @@<\/p>\n # 4. \u5206\u6790\u5d29\u6e83\u6837\u672c
\nls out\/crashes\/
\nafl-tmin -i out\/crashes\/id:000000* -o minimized_crash — .\/target_fuzz @@ <\/p>\n 4.3 AI\u8f85\u52a9BUG\u9884\u6d4b<\/h4>\n\u57fa\u4e8e\u4ee3\u7801\u5d4c\u5165\u7684\u7f3a\u9677\u9884\u6d4b\u6a21\u578b<\/p>\n # \u4f7f\u7528CodeBERT\u8fdb\u884c\u6f0f\u6d1e\u68c0\u6d4b
\nfrom transformers import AutoTokenizer, AutoModelForSequenceClassification
\nimport torch<\/p>\n tokenizer = AutoTokenizer.from_pretrained("microsoft\/codebert-base")
\nmodel = AutoModelForSequenceClassification.from_pretrained("custom-vuln-detector")<\/p>\n def predict_bug(code_snippet):
\n inputs = tokenizer(code_snippet, return_tensors="pt", truncation=True, max_length=512)
\n outputs = model(**inputs)
\n probs = torch.softmax(outputs.logits, dim=-1)
\n return {
\n "bug_probability": probs[0][1].item(),
\n "suggested_fix": generate_fix(code_snippet) if probs[0][1] > 0.8 else None
\n } <\/p>\n
\n\u4e94\u3001\u56e2\u961f\u534f\u4f5c\u4e0e\u77e5\u8bc6\u6c89\u6dc0<\/h3>\n5.1 \u4ee3\u7801\u5ba1\u67e5 checklist<\/h4>\n\u5b89\u5168\u5ba1\u67e5\u8981\u70b9（Web\u5e94\u7528）<\/p>\n \n- \n
[ ] \u6240\u6709\u7528\u6237\u8f93\u5165\u662f\u5426\u7ecf\u8fc7\u9a8c\u8bc1\u548c\u8f6c\u4e49？<\/p>\n<\/li>\n - \n
[ ] \u6570\u636e\u5e93\u64cd\u4f5c\u662f\u5426\u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2？<\/p>\n<\/li>\n - \n
[ ] \u654f\u611f\u64cd\u4f5c\u662f\u5426\u6709\u6743\u9650\u6821\u9a8c？<\/p>\n<\/li>\n - \n
[ ] \u6587\u4ef6\u4e0a\u4f20\u662f\u5426\u9650\u5236\u7c7b\u578b\u5e76\u68c0\u67e5\u5185\u5bb9？<\/p>\n<\/li>\n - \n
[ ] \u9519\u8bef\u4fe1\u606f\u662f\u5426\u6cc4\u9732\u7cfb\u7edf\u4fe1\u606f（\u5806\u6808\u8ddf\u8e2a\u3001SQL\u8bed\u53e5）？<\/p>\n<\/li>\n<\/ul>\n 5.2 Jira \u7f3a\u9677\u5de5\u4f5c\u6d41\u914d\u7f6e<\/h4>\n\u5f85\u5904\u7406 \u2192 \u5df2\u786e\u8ba4 \u2192 \u4fee\u590d\u4e2d \u2192 \u5f85\u9a8c\u8bc1 \u2192 \u5df2\u5173\u95ed
\n \u2191________\u2193（\u91cd\u65b0\u6253\u5f00）<\/p>\n \u81ea\u5b9a\u4e49\u5b57\u6bb5：
\n– \u7f3a\u9677\u7c7b\u578b：[\u5b89\u5168\u6f0f\u6d1e\/\u529f\u80fd\u7f3a\u9677\/\u6027\u80fd\u95ee\u9898\/\u517c\u5bb9\u6027\u95ee\u9898]
\n– \u5f15\u5165\u9636\u6bb5：[\u9700\u6c42\/\u8bbe\u8ba1\/\u7f16\u7801\/\u6d4b\u8bd5\/\u7ebf\u4e0a]
\n– \u6839\u56e0\u5206\u6790：[\u903b\u8f91\u9519\u8bef\/\u914d\u7f6e\u95ee\u9898\/\u7b2c\u4e09\u65b9\u7ec4\u4ef6\/\u73af\u5883\u95ee\u9898] <\/p>\n 5.3 \u6280\u672f\u590d\u76d8\u6a21\u677f<\/h4>\n## BUG\u590d\u76d8\u62a5\u544a：[\u6807\u9898]<\/p>\n ### \u73b0\u8c61\u63cf\u8ff0
\n– \u53d1\u73b0\u65f6\u95f4：
\n– \u5f71\u54cd\u8303\u56f4：
\n– \u4e1a\u52a1\u635f\u5931：<\/p>\n ### \u6839\u56e0\u5206\u6790（5 Whys）
\n1. \u4e3a\u4ec0\u4e48\u7cfb\u7edf\u5d29\u6e83？\u2192 \u5185\u5b58\u8017\u5c3d
\n2. \u4e3a\u4ec0\u4e48\u5185\u5b58\u8017\u5c3d？\u2192 \u7f13\u5b58\u672a\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4
\n3. \u4e3a\u4ec0\u4e48\u672a\u8bbe\u7f6e\u8fc7\u671f？\u2192 \u8bbe\u8ba1\u8bc4\u5ba1\u9057\u6f0f\u975e\u529f\u80fd\u6027\u9700\u6c42
\n4. \u4e3a\u4ec0\u4e48\u8bc4\u5ba1\u9057\u6f0f？\u2192 \u7f3a\u4e4f\u7f13\u5b58\u8bbe\u8ba1checklist
\n5. \u4e3a\u4ec0\u4e48\u6ca1\u6709checklist？\u2192 \u77e5\u8bc6\u7ba1\u7406\u4e0d\u5b8c\u5584<\/p>\n ### \u4fee\u590d\u65b9\u6848
\n– \u77ed\u671f：\u91cd\u542f\u670d\u52a1，\u6e05\u7406\u7f13\u5b58
\n– \u4e2d\u671f：\u6dfb\u52a0TTL\u548cLRU\u7b56\u7565
\n– \u957f\u671f：\u5efa\u7acb\u67b6\u6784\u8bc4\u5ba1\u673a\u5236<\/p>\n ### \u9884\u9632\u63aa\u65bd
\n– [ ] \u4ee3\u7801：\u6dfb\u52a0\u7f13\u5b58\u5927\u5c0f\u76d1\u63a7\u544a\u8b66
\n– [ ] \u6d41\u7a0b：\u67b6\u6784\u8bbe\u8ba1\u6a21\u677f\u589e\u52a0\u7f13\u5b58\u7ae0\u8282
\n– [ ] \u5de5\u5177：SonarQube\u89c4\u5219\u68c0\u6d4b\u65e0\u8fc7\u671f\u65f6\u95f4\u7684\u7f13\u5b58 <\/p>\n
\n\u516d\u3001\u8fdb\u9636\u65b9\u5411\u4e0e\u8d44\u6e90\u63a8\u8350<\/h3>\n6.1 \u5b89\u5168\u6f0f\u6d1e\u6316\u6398\u8def\u5f84<\/h4>\nOWASP Top 10 \u5b9e\u6218\u9776\u573a<\/p>\n \n\u6392\u540d\u6f0f\u6d1e\u7c7b\u578b\u63a8\u8350\u9776\u573a\u5173\u952e\u5de5\u5177<\/tr>\n \n\n| A01<\/td>\n | \u5931\u6548\u7684\u8bbf\u95ee\u63a7\u5236<\/td>\n | DVWA\u3001Pikachu<\/td>\n | Burp Suite\u3001JWT_Tool<\/td>\n<\/tr>\n | \n| A03<\/td>\n | \u6ce8\u5165\u653b\u51fb<\/td>\n | SQLi-Labs<\/td>\n | sqlmap\u3001NoSQLMap<\/td>\n<\/tr>\n | \n| A05<\/td>\n | \u5b89\u5168\u914d\u7f6e\u9519\u8bef<\/td>\n | VulHub Docker<\/td>\n | Nmap\u3001Nikto<\/td>\n<\/tr>\n | \n| A07<\/td>\n | \u8eab\u4efd\u8bc6\u522b\u9519\u8bef<\/td>\n | WebGoat<\/td>\n | Hashcat\u3001Hydra<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n6.2 \u5f00\u6e90\u793e\u533aBUG\u72e9\u730e<\/h4>\n\u65b0\u624b\u53cb\u597d\u9879\u76ee<\/p>\n \n- \n
Mozilla Firefox: good-first-bug\u6807\u7b7e<\/p>\n<\/li>\n - \n
Apache Commons: \u57fa\u7840\u5e93，\u5f71\u54cd\u9762\u5e7f<\/p>\n<\/li>\n - \n
VS Code: TypeScript\u9879\u76ee，\u8c03\u8bd5\u4f53\u9a8c\u597d<\/p>\n<\/li>\n<\/ul>\n \u63d0\u4ea4\u89c4\u8303<\/p>\n # 1. \u590d\u73b0\u95ee\u9898\u5e76\u7f16\u5199\u6d4b\u8bd5\u7528\u4f8b
\n# 2. \u4fee\u590d\u540e\u786e\u4fdd\u6240\u6709\u6d4b\u8bd5\u901a\u8fc7
\nmvn test # Java\u9879\u76ee
\npytest # Python\u9879\u76ee<\/p>\n # 3. \u63d0\u4ea4\u4fe1\u606f\u683c\u5f0f
\ngit commit -m "Fix #12345: \u4fee\u590d\u7a7a\u6307\u9488\u5f02\u5e38<\/p>\n \u95ee\u9898\u539f\u56e0：\u672a\u68c0\u67e5\u7528\u6237\u8f93\u5165\u4e3a\u7a7a\u7684\u60c5\u51b5
\n\u89e3\u51b3\u65b9\u6848：\u6dfb\u52a0Optional\u5305\u88c5\u548c\u524d\u7f6e\u9a8c\u8bc1
\n\u6d4b\u8bd5\u8986\u76d6：\u6dfb\u52a0\u8fb9\u754c\u6761\u4ef6\u5355\u5143\u6d4b\u8bd5" <\/p>\n 6.3 \u63a8\u8350\u8d44\u6e90\u6e05\u5355<\/h4>\n\u4e66\u7c4d<\/p>\n \n- \n
\u300aDebugging: The 9 Indispensable Rules\u300b – \u8c03\u8bd5\u601d\u7ef4\u65b9\u6cd5\u8bba<\/p>\n<\/li>\n - \n
\u300aThe Art of Software Security Assessment\u300b – \u6f0f\u6d1e\u6316\u6398\u5723\u7ecf<\/p>\n<\/li>\n - \n
\u300aSystems Performance: Enterprise and the Cloud\u300b – \u6027\u80fd\u5206\u6790\u5b9e\u6218<\/p>\n<\/li>\n<\/ul>\n \u5de5\u5177\u901f\u67e5\u8868<\/p>\n # \u5185\u5b58\u8c03\u8bd5
\nvalgrind –tool=memcheck –leak-check=full .\/app
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\nperf top -p $(pgrep process_name)
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\n1.1 \u6311\u6218\u8d5b\u7684\u76ee\u6807\u4e0e\u610f\u4e49
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