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#include "clar_libgit2.h"
#include "buffer.h"
/*
* We want to use some ridiculous size that `malloc` will fail with
* but that does not otherwise interfere with testing. On Linux, choose
* a number that is large enough to fail immediately but small enough
* that valgrind doesn't believe it to erroneously be a negative number.
* On macOS, choose a number that is large enough to fail immediately
* without having libc print warnings to stderr.
*/
#if defined(GIT_ARCH_64) && defined(__linux__)
# define TOOBIG 0x0fffffffffffffff
#elif defined(GIT_ARCH_64)
# define TOOBIG 0xffffffffffffff00
#endif
/**
* If we make a ridiculously large request the first time we
* actually allocate some space in the git_buf, the realloc()
* will fail. And because the git_buf_grow() wrapper always
* sets mark_oom, the code in git_buf_try_grow() will free
* the internal buffer and set it to git_buf__oom.
*
* We initialized the internal buffer to (the static variable)
* git_buf__initbuf. The purpose of this test is to make sure
* that we don't try to free the static buffer.
*
* Skip this test entirely on 32-bit platforms; a buffer large enough
* to guarantee malloc failures is so large that valgrind considers
* it likely to be an error.
*/
void test_buf_oom__grow(void)
{
#ifdef GIT_ARCH_64
git_buf buf = GIT_BUF_INIT;
git_buf_clear(&buf);
cl_assert(git_buf_grow(&buf, TOOBIG) == -1);
cl_assert(git_buf_oom(&buf));
git_buf_dispose(&buf);
#else
cl_skip();
#endif
}
void test_buf_oom__grow_by(void)
{
git_buf buf = GIT_BUF_INIT;
buf.size = SIZE_MAX-10;
cl_assert(git_buf_grow_by(&buf, 50) == -1);
cl_assert(git_buf_oom(&buf));
}
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