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author | digit@chromium.org <digit@chromium.org@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2012-08-31 18:38:29 +0000 |
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committer | digit@chromium.org <digit@chromium.org@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2012-08-31 18:38:29 +0000 |
commit | 7e3c538af1bdee7f5a4c04e11715488f1d4efd15 (patch) | |
tree | f1e36060e1fe50ce09eba0855d225478e623a8d8 /src/common/android/breakpad_getcontext_unittest.cc | |
parent | Fix 'make check' for Android (diff) | |
download | breakpad-7e3c538af1bdee7f5a4c04e11715488f1d4efd15.tar.xz |
Add custom getcontext() implementation for Android.
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
Diffstat (limited to 'src/common/android/breakpad_getcontext_unittest.cc')
-rw-r--r-- | src/common/android/breakpad_getcontext_unittest.cc | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/common/android/breakpad_getcontext_unittest.cc b/src/common/android/breakpad_getcontext_unittest.cc new file mode 100644 index 00000000..004390c3 --- /dev/null +++ b/src/common/android/breakpad_getcontext_unittest.cc @@ -0,0 +1,76 @@ +// 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. + +#include <sys/ucontext.h> + +#include "breakpad_googletest_includes.h" +#include "common/android/ucontext_constants.h" + +TEST(AndroidUContext, GRegsOffset) { +#ifdef __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(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.arm_r0)); +#elif defined(__i386__) + ASSERT_EQ(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.gregs)); +#define CHECK_REG(x) \ + ASSERT_EQ(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(UCONTEXT_FPREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.fpregs)); + + ASSERT_EQ(UCONTEXT_FPREGS_MEM_OFFSET, + offsetof(ucontext_t,__fpregs_mem)); +#else + ASSERT_EQ(MCONTEXT_GREGS_OFFSET, offsetof(ucontext_t,uc_mcontext.gregs)); +#endif +} + +TEST(AndroidUContext, SigmakOffset) { + ASSERT_EQ(UCONTEXT_SIGMASK_OFFSET, offsetof(ucontext_t,uc_sigmask)); +} |