| 1 | // Test that the common part implementation of *printf interceptors does not |
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| 2 | // cause negative-size-param false positives. |
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| 3 | |
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| 4 | // RUN: %clangxx -O2 %s -o %t |
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| 5 | // RUN: %env_tool_opts=check_printf=1 %run %t 2>&1 |
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| 6 | |
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| 7 | // FIXME: The maximum supported allocation size is too platform-specific: |
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| 8 | // REQUIRES: x86_64-target-arch |
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| 9 | |
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| 10 | // FIXME: printf is not intercepted on Windows yet. |
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| 11 | // UNSUPPORTED: target={{.*windows-msvc.*}} |
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| 12 | |
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| 13 | #include <stdarg.h> |
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| 14 | #include <stdio.h> |
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| 15 | #include <stdlib.h> |
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| 16 | #include <string.h> |
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| 17 | |
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| 18 | void write(char *buf, int buf_size, const char *fmt, ...) { |
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| 19 | va_list args; |
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| 20 | va_start(args, fmt); |
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| 21 | vsnprintf(s: buf, maxlen: buf_size, format: fmt, arg: args); |
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| 22 | va_end(args); |
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| 23 | } |
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| 24 | |
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| 25 | int main() { |
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| 26 | char buffer[100]; |
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| 27 | const size_t kStrSize = 1UL << 31; |
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| 28 | char *x = (char *)malloc(size: kStrSize); |
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| 29 | memset(s: x, c: '=', n: kStrSize - 1); |
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| 30 | x[kStrSize - 1] = 0; |
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| 31 | write(buf: buffer, buf_size: 100, fmt: "%s\n" , x); |
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| 32 | free(ptr: x); |
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| 33 | return 0; |
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| 34 | } |
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| 35 | |
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