diff options
Diffstat (limited to 'src/common/linux/breakpad_getcontext_unittest.cc')
| -rw-r--r-- | src/common/linux/breakpad_getcontext_unittest.cc | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/common/linux/breakpad_getcontext_unittest.cc b/src/common/linux/breakpad_getcontext_unittest.cc new file mode 100644 index 00000000..a57bfedf --- /dev/null +++ b/src/common/linux/breakpad_getcontext_unittest.cc @@ -0,0 +1,194 @@ +// 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)); +} |