clang/test/Analysis/std-c-library-functions-eof.c

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
   2 // RUN: %clang_analyze_cc1 -triple i686-unknown-linux -analyzer-checker=core,apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
   3 // RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=core,apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
   4 // RUN: %clang_analyze_cc1 -triple armv7-a15-linux -analyzer-checker=core,apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
   5 // RUN: %clang_analyze_cc1 -triple thumbv7-a15-linux -analyzer-checker=core,apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
   6
   7 void clang_analyzer_eval(int);
   8
   9 typedef struct FILE FILE;
  10 // Unorthodox EOF value.
  11 #define EOF (-2)
  12
  13 int getc(FILE *);
  14 void test_getc(FILE *fp) {
  15
  16   int x;
  17   while ((x = getc(fp)) != EOF) {
  18     clang_analyzer_eval(x > 255); // expected-warning{{FALSE}}
  19     clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
  20   }
  21
  22   int y = getc(fp);
  23   if (y < 0) {
  24     clang_analyzer_eval(y == -2); // expected-warning{{TRUE}}
  25   }
  26 }