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linux-user: Handle brk() attempts with very large sizes
In do_brk(), we were inadvertently truncating the size of a requested brk() from the guest by putting it into an 'int' variable. This meant that we would incorrectly report success back to the guest rather than a failed allocation, typically resulting in the guest then segfaulting. Use abi_ulong instead. This fixes a crash in the '31370.cc' test in the gcc libstdc++ test suite (the test case starts by trying to allocate a very large size and reduces the size until the allocation succeeds). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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@ -839,7 +839,7 @@ void target_set_brk(abi_ulong new_brk)
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abi_long do_brk(abi_ulong new_brk)
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{
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abi_long mapped_addr;
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int new_alloc_size;
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abi_ulong new_alloc_size;
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DEBUGF_BRK("do_brk(" TARGET_ABI_FMT_lx ") -> ", new_brk);
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