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kernel/linux-rt-4.4.41/scripts/coccinelle/misc/bugon.cocci 1.42 KB
5113f6f70   김현기   kernel add
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  /// Use BUG_ON instead of a if condition followed by BUG.
  ///
  //# This makes an effort to find cases where BUG() follows an if
  //# condition on an expression and replaces the if condition and BUG()
  //# with a BUG_ON having the conditional expression of the if statement
  //# as argument.
  //
  // Confidence: High
  // Copyright: (C) 2014 Himangi Saraogi.  GPLv2.
  // Comments:
  // Options: --no-includes --include-headers
  
  virtual patch
  virtual context
  virtual org
  virtual report
  
  //----------------------------------------------------------
  //  For context mode
  //----------------------------------------------------------
  
  @depends on context@
  expression e;
  @@
  
  *if (e) BUG();
  
  //----------------------------------------------------------
  //  For patch mode
  //----------------------------------------------------------
  
  @depends on patch@
  expression e;
  @@
  
  -if (e) BUG();
  +BUG_ON(e);
  
  //----------------------------------------------------------
  //  For org and report mode
  //----------------------------------------------------------
  
  @r@
  expression e;
  position p;
  @@
  
   if (e) BUG@p ();
  
  @script:python depends on org@
  p << r.p;
  @@
  
  coccilib.org.print_todo(p[0], "WARNING use BUG_ON")
  
  @script:python depends on report@
  p << r.p;
  @@
  
  msg="WARNING: Use BUG_ON instead of if condition followed by BUG.
  Please make sure the condition has no side effects (see conditional BUG_ON definition in include/asm-generic/bug.h)"
  coccilib.report.print_report(p[0], msg)