1 // Copyright (c) 2012, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 #if defined(__x86_64__) 31 #include <asm/sigcontext.h> 32 #endif 33 34 #include <sys/ucontext.h> 35 36 #include "breakpad_googletest_includes.h" 37 #include "common/android/ucontext_constants.h" 38 39 template <int left, int right> 40 struct CompileAssertEquals { 41 // a compilation error here indicates left and right are not equal. 42 char left_too_large[right - left]; 43 // a compilation error here indicates left and right are not equal. 44 char right_too_large[left - right]; 45 }; 46 47 #define COMPILE_ASSERT_EQ(left, right, tag) \ 48 CompileAssertEquals<left, right> tag; 49 50 TEST(AndroidUContext, GRegsOffset) { 51 #if defined(__arm__) 52 // There is no gregs[] array on ARM, so compare to the offset of 53 // first register fields, since they're stored in order. 54 ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 55 offsetof(ucontext_t,uc_mcontext.arm_r0)); 56 #elif defined(__aarch64__) 57 // There is no gregs[] array on ARM, so compare to the offset of 58 // first register fields, since they're stored in order. 59 ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 60 offsetof(ucontext_t,uc_mcontext.regs[0])); 61 ASSERT_EQ(static_cast<size_t>(MCONTEXT_SP_OFFSET), 62 offsetof(ucontext_t,uc_mcontext.sp)); 63 ASSERT_EQ(static_cast<size_t>(MCONTEXT_PC_OFFSET), 64 offsetof(ucontext_t,uc_mcontext.pc)); 65 ASSERT_EQ(static_cast<size_t>(MCONTEXT_PSTATE_OFFSET), 66 offsetof(ucontext_t,uc_mcontext.pstate)); 67 ASSERT_EQ(static_cast<size_t>(MCONTEXT_EXTENSION_OFFSET), 68 offsetof(ucontext_t,uc_mcontext.__reserved)); 69 #elif defined(__i386__) 70 ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 71 offsetof(ucontext_t,uc_mcontext.gregs)); 72 #define CHECK_REG(x) \ 73 ASSERT_EQ(static_cast<size_t>(MCONTEXT_##x##_OFFSET), \ 74 offsetof(ucontext_t,uc_mcontext.gregs[REG_##x])) 75 CHECK_REG(GS); 76 CHECK_REG(FS); 77 CHECK_REG(ES); 78 CHECK_REG(DS); 79 CHECK_REG(EDI); 80 CHECK_REG(ESI); 81 CHECK_REG(EBP); 82 CHECK_REG(ESP); 83 CHECK_REG(EBX); 84 CHECK_REG(EDX); 85 CHECK_REG(ECX); 86 CHECK_REG(EAX); 87 CHECK_REG(TRAPNO); 88 CHECK_REG(ERR); 89 CHECK_REG(EIP); 90 CHECK_REG(CS); 91 CHECK_REG(EFL); 92 CHECK_REG(UESP); 93 CHECK_REG(SS); 94 95 ASSERT_EQ(static_cast<size_t>(UCONTEXT_FPREGS_OFFSET), 96 offsetof(ucontext_t,uc_mcontext.fpregs)); 97 98 ASSERT_EQ(static_cast<size_t>(UCONTEXT_FPREGS_MEM_OFFSET), 99 offsetof(ucontext_t,__fpregs_mem)); 100 #elif defined(__mips__) 101 ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 102 offsetof(ucontext_t,uc_mcontext.gregs)); 103 104 // PC for mips is not part of gregs. 105 ASSERT_EQ(static_cast<size_t>(MCONTEXT_PC_OFFSET), 106 offsetof(ucontext_t,uc_mcontext.pc)); 107 108 ASSERT_EQ(static_cast<size_t>(MCONTEXT_FPREGS_OFFSET), 109 offsetof(ucontext_t,uc_mcontext.fpregs)); 110 111 ASSERT_EQ(static_cast<size_t>(MCONTEXT_FPC_CSR), 112 offsetof(ucontext_t,uc_mcontext.fpc_csr)); 113 #elif defined(__x86_64__) 114 115 COMPILE_ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 116 offsetof(ucontext_t,uc_mcontext.gregs), 117 mcontext_gregs_offset); 118 #define CHECK_REG(x) \ 119 COMPILE_ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_##x), \ 120 offsetof(ucontext_t,uc_mcontext.gregs[REG_##x]), reg_##x) 121 CHECK_REG(R8); 122 CHECK_REG(R9); 123 CHECK_REG(R10); 124 CHECK_REG(R11); 125 CHECK_REG(R12); 126 CHECK_REG(R13); 127 CHECK_REG(R14); 128 CHECK_REG(R15); 129 CHECK_REG(RDI); 130 CHECK_REG(RSI); 131 CHECK_REG(RBP); 132 CHECK_REG(RBX); 133 CHECK_REG(RDX); 134 CHECK_REG(RAX); 135 CHECK_REG(RCX); 136 CHECK_REG(RSP); 137 CHECK_REG(RIP); 138 139 // sigcontext is an analog to mcontext_t. The layout should be the same. 140 COMPILE_ASSERT_EQ(offsetof(mcontext_t,fpregs), 141 offsetof(sigcontext,fpstate), sigcontext_fpstate); 142 // Check that _fpstate from asm/sigcontext.h is essentially the same 143 // as _libc_fpstate. 144 COMPILE_ASSERT_EQ(sizeof(_libc_fpstate), sizeof(_fpstate), 145 sigcontext_fpstate_size); 146 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,cwd),offsetof(_fpstate,cwd), 147 sigcontext_fpstate_cwd); 148 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,swd),offsetof(_fpstate,swd), 149 sigcontext_fpstate_swd); 150 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,ftw),offsetof(_fpstate,twd), 151 sigcontext_fpstate_twd); 152 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,fop),offsetof(_fpstate,fop), 153 sigcontext_fpstate_fop); 154 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,rip),offsetof(_fpstate,rip), 155 sigcontext_fpstate_rip); 156 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,rdp),offsetof(_fpstate,rdp), 157 sigcontext_fpstate_rdp); 158 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,mxcsr),offsetof(_fpstate,mxcsr), 159 sigcontext_fpstate_mxcsr); 160 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,mxcr_mask), 161 offsetof(_fpstate,mxcsr_mask), 162 sigcontext_fpstate_mxcsr_mask); 163 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,_st), offsetof(_fpstate,st_space), 164 sigcontext_fpstate_stspace); 165 COMPILE_ASSERT_EQ(offsetof(_libc_fpstate,_xmm), offsetof(_fpstate,xmm_space), 166 sigcontext_fpstate_xmm_space); 167 168 COMPILE_ASSERT_EQ(MCONTEXT_FPREGS_PTR, 169 offsetof(ucontext_t,uc_mcontext.fpregs), 170 mcontext_fpregs_ptr); 171 COMPILE_ASSERT_EQ(MCONTEXT_FPREGS_MEM, offsetof(ucontext_t,__fpregs_mem), 172 mcontext_fpregs_mem); 173 COMPILE_ASSERT_EQ(FPREGS_OFFSET_MXCSR, offsetof(_libc_fpstate,mxcsr), 174 fpregs_offset_mxcsr); 175 COMPILE_ASSERT_EQ(UCONTEXT_SIGMASK_OFFSET, offsetof(ucontext_t, uc_sigmask), 176 ucontext_sigmask); 177 #else 178 ASSERT_EQ(static_cast<size_t>(MCONTEXT_GREGS_OFFSET), 179 offsetof(ucontext_t,uc_mcontext.gregs)); 180 #endif 181 } 182 183 TEST(AndroidUContext, SigmakOffset) { 184 ASSERT_EQ(static_cast<size_t>(UCONTEXT_SIGMASK_OFFSET), 185 offsetof(ucontext_t,uc_sigmask)); 186 } 187
