| // Copyright (c) 2012, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // asm/sigcontext.h can't be included with signal.h on glibc or |
| // musl, so only compare _libc_fpstate and _fpstate on Android. |
| #if defined(__ANDROID__) && defined(__x86_64__) |
| #include <asm/sigcontext.h> |
| #endif |
| |
| #include <sys/ucontext.h> |
| |
| #include <type_traits> |
| |
| #include "breakpad_googletest_includes.h" |
| #include "common/linux/ucontext_constants.h" |
| |
| template <int left, int right> |
| struct CompileAssertEquals { |
| // a compilation error here indicates left and right are not equal. |
| char left_too_large[right - left]; |
| // a compilation error here indicates left and right are not equal. |
| char right_too_large[left - right]; |
| }; |
| |
| #define COMPILE_ASSERT_EQ(left, right, tag) \ |
| CompileAssertEquals<left, right> tag; |
| |
| TEST(AndroidUContext, GRegsOffset) { |
| #if defined(__arm__) |
| // There is no gregs[] array on ARM, so compare to the offset of |
| // first register fields, since they're stored in order. |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.arm_r0)); |
| #elif defined(__aarch64__) |
| // There is no gregs[] array on ARM, so compare to the offset of |
| // first register fields, since they're stored in order. |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.regs[0])); |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_SP_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.sp)); |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_PC_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.pc)); |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_PSTATE_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.pstate)); |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_EXTENSION_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.__reserved)); |
| #elif defined(__i386__) |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.gregs)); |
| #define CHECK_REG(x) \ |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_##x##_OFFSET), \ |
| offsetof(ucontext_t,uc_mcontext.gregs[REG_##x])) |
| CHECK_REG(GS); |
| CHECK_REG(FS); |
| CHECK_REG(ES); |
| CHECK_REG(DS); |
| CHECK_REG(EDI); |
| CHECK_REG(ESI); |
| CHECK_REG(EBP); |
| CHECK_REG(ESP); |
| CHECK_REG(EBX); |
| CHECK_REG(EDX); |
| CHECK_REG(ECX); |
| CHECK_REG(EAX); |
| CHECK_REG(TRAPNO); |
| CHECK_REG(ERR); |
| CHECK_REG(EIP); |
| CHECK_REG(CS); |
| CHECK_REG(EFL); |
| CHECK_REG(UESP); |
| CHECK_REG(SS); |
| |
| ASSERT_EQ(static_cast<size_t>(UCONTEXT_FPREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.fpregs)); |
| |
| ASSERT_EQ(static_cast<size_t>(UCONTEXT_FPREGS_MEM_OFFSET), |
| offsetof(ucontext_t,__fpregs_mem)); |
| #elif defined(__mips__) |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.gregs)); |
| |
| // PC for mips is not part of gregs. |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_PC_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.pc)); |
| |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_FPREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.fpregs)); |
| |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_FPC_CSR), |
| offsetof(ucontext_t,uc_mcontext.fpc_csr)); |
| #elif defined(__x86_64__) |
| |
| COMPILE_ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.gregs), |
| mcontext_gregs_offset); |
| #define CHECK_REG(x) \ |
| COMPILE_ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_##x), \ |
| offsetof(ucontext_t,uc_mcontext.gregs[REG_##x]), reg_##x) |
| CHECK_REG(R8); |
| CHECK_REG(R9); |
| CHECK_REG(R10); |
| CHECK_REG(R11); |
| CHECK_REG(R12); |
| CHECK_REG(R13); |
| CHECK_REG(R14); |
| CHECK_REG(R15); |
| CHECK_REG(RDI); |
| CHECK_REG(RSI); |
| CHECK_REG(RBP); |
| CHECK_REG(RBX); |
| CHECK_REG(RDX); |
| CHECK_REG(RAX); |
| CHECK_REG(RCX); |
| CHECK_REG(RSP); |
| CHECK_REG(RIP); |
| |
| // sigcontext is an analog to mcontext_t. The layout should be the same. |
| COMPILE_ASSERT_EQ(offsetof(mcontext_t,fpregs), |
| offsetof(sigcontext,fpstate), sigcontext_fpstate); |
| |
| #if defined(__ANDROID__) |
| // Check that _fpstate from asm/sigcontext.h is essentially the same |
| // as _libc_fpstate. |
| COMPILE_ASSERT_EQ(sizeof(_libc_fpstate), sizeof(_fpstate), |
| sigcontext_fpstate_size); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,cwd),offsetof(_fpstate,cwd), |
| sigcontext_fpstate_cwd); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,swd),offsetof(_fpstate,swd), |
| sigcontext_fpstate_swd); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,ftw),offsetof(_fpstate,twd), |
| sigcontext_fpstate_twd); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,fop),offsetof(_fpstate,fop), |
| sigcontext_fpstate_fop); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,rip),offsetof(_fpstate,rip), |
| sigcontext_fpstate_rip); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,rdp),offsetof(_fpstate,rdp), |
| sigcontext_fpstate_rdp); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,mxcsr),offsetof(_fpstate,mxcsr), |
| sigcontext_fpstate_mxcsr); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,mxcr_mask), |
| offsetof(_fpstate,mxcsr_mask), |
| sigcontext_fpstate_mxcsr_mask); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,_st), offsetof(_fpstate,st_space), |
| sigcontext_fpstate_stspace); |
| COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,_xmm), offsetof(_fpstate,xmm_space), |
| sigcontext_fpstate_xmm_space); |
| #endif |
| |
| COMPILE_ASSERT_EQ(MCONTEXT_FPREGS_PTR, |
| offsetof(ucontext_t,uc_mcontext.fpregs), |
| mcontext_fpregs_ptr); |
| COMPILE_ASSERT_EQ(MCONTEXT_FPREGS_MEM, offsetof(ucontext_t,__fpregs_mem), |
| mcontext_fpregs_mem); |
| COMPILE_ASSERT_EQ(FPREGS_OFFSET_MXCSR, |
| offsetof(std::remove_pointer<fpregset_t>::type,mxcsr), |
| fpregs_offset_mxcsr); |
| COMPILE_ASSERT_EQ(UCONTEXT_SIGMASK_OFFSET, offsetof(ucontext_t, uc_sigmask), |
| ucontext_sigmask); |
| #else |
| ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), |
| offsetof(ucontext_t,uc_mcontext.gregs)); |
| #endif |
| } |
| |
| TEST(AndroidUContext, SigmakOffset) { |
| ASSERT_EQ(static_cast<size_t>(UCONTEXT_SIGMASK_OFFSET), |
| offsetof(ucontext_t,uc_sigmask)); |
| } |
