什么是Webkit中使用的0xbbadbeef？

Question

使用Webkit时遇到错误,指针设置为0xbbadbeef.什么是BadBeef在Webkit中使用？

Answer 1

它是WebKit中使用的hexspeak,它表示已知的,不可恢复的错误,例如内存不足.

您可以从以下链接中看到https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/wtf/Assertions.h&l=180

/* CRASH() - Raises a fatal error resulting in program termination and triggering either the debugger or the crash reporter.

   Use CRASH() in response to known, unrecoverable errors like out-of-memory.
   Macro is enabled in both debug and release mode.
   To test for unknown errors and verify assumptions, use ASSERT instead, to avoid impacting performance in release builds.

   Signals are ignored by the crash reporter on OS X so we must do better.
*/
#ifndef CRASH
#if COMPILER(MSVC)
#define CRASH() (__debugbreak(), IMMEDIATE_CRASH())
#else
#define CRASH() \
    (WTFReportBacktrace(), (*(int*)0xfbadbeef = 0), IMMEDIATE_CRASH())
#endif
#endif