forked from OSchip/llvm-project
30 lines
786 B
C++
30 lines
786 B
C++
// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
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// RUN: %clangxx_msan -std=c++11 -fsanitize-memory-track-origins -O0 %s -o %t && %run %t
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#include <assert.h>
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#include <stdio.h>
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#include <sanitizer/msan_interface.h>
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int main(int argc, char *argv[]) {
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FILE *f = fopen(argv[0], "r");
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assert(f);
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char buf[50];
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fread(buf, 1, 1, f);
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fflush(f);
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assert(f->_IO_read_end > f->_IO_read_base);
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__msan_check_mem_is_initialized(f->_IO_read_end, f->_IO_read_end - f->_IO_read_base);
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char tmp_file[1000];
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sprintf(tmp_file, "%s.write.tmp", argv[0]);
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f = fopen(tmp_file, "w+");
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assert(f);
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fwrite(buf, 1, 1, f);
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fflush(f);
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assert(f->_IO_write_end > f->_IO_write_base);
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__msan_check_mem_is_initialized(f->_IO_write_end, f->_IO_write_end - f->_IO_write_base);
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}
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