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https://github.com/yuzu-mirror/breakpad.git
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7e3c538af1
This adds a minimalistic implementation of getcontext() for Android/ARM and Android/x86. The provided code is in assembly and only implements the bare minimum required by Breakpad to get the current processor state. Note that: - The FPU state is not saved to the ucontext_t on ARM. (that's actually the main difference with a normal getcontext() implementation). This is normal. On Linux/ARM, such state must be obtained with PTRACE_GETVFPREGS instead. This will be implemented in a future patch. - On x86, only the 'regular' FPU state is saved, to mimic the GLibc/i386 implementation. The state of SSE/SSE2/etc registers is not part of the upstream getcontext() implementation. Review URL: https://breakpad.appspot.com/444002 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1024 4c0a9323-5329-0410-9bdc-e9ce6186880e
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Copyright (c) 2012, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <sys/ucontext.h>
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#include "breakpad_googletest_includes.h"
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#include "common/android/ucontext_constants.h"
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TEST(AndroidUContext, GRegsOffset) {
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#ifdef __arm__
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// There is no gregs[] array on ARM, so compare to the offset of
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// first register fields, since they're stored in order.
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ASSERT_EQ(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.arm_r0));
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#elif defined(__i386__)
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ASSERT_EQ(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.gregs));
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#define CHECK_REG(x) \
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ASSERT_EQ(MCONTEXT_##x##_OFFSET, \
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offsetof(ucontext_t,uc_mcontext.gregs[REG_##x]))
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CHECK_REG(GS);
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CHECK_REG(FS);
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CHECK_REG(ES);
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CHECK_REG(DS);
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CHECK_REG(EDI);
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CHECK_REG(ESI);
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CHECK_REG(EBP);
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CHECK_REG(ESP);
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CHECK_REG(EBX);
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CHECK_REG(EDX);
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CHECK_REG(ECX);
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CHECK_REG(EAX);
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CHECK_REG(TRAPNO);
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CHECK_REG(ERR);
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CHECK_REG(EIP);
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CHECK_REG(CS);
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CHECK_REG(EFL);
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CHECK_REG(UESP);
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CHECK_REG(SS);
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ASSERT_EQ(UCONTEXT_FPREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.fpregs));
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ASSERT_EQ(UCONTEXT_FPREGS_MEM_OFFSET,
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offsetof(ucontext_t,__fpregs_mem));
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#else
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ASSERT_EQ(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.gregs));
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#endif
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}
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TEST(AndroidUContext, SigmakOffset) {
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ASSERT_EQ(UCONTEXT_SIGMASK_OFFSET, offsetof(ucontext_t,uc_sigmask));
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}
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