thodg/libgit2/tests/buf/oom.c
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Hash : 4aa664ae
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Date : 2015-02-10T23:55:07
git_buf_grow_by: increase buf asize incrementally Introduce `git_buf_grow_by` to incrementally increase the size of a `git_buf`, performing an overflow calculation on the growth.
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tests/buf/oom.c
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#include "clar_libgit2.h" #include "buffer.h" #if defined(GIT_ARCH_64) #define TOOBIG 0xffffffffffffff00 #else #define TOOBIG 0xffffff00 #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. */ void test_buf_oom__grow(void) { 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_free(&buf); } 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)); }