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Implement function to get registers from suspended thread on darwin 

Reviewers: kubamracek, alekseyshl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D32182

llvm-svn: 300691
This commit is contained in:
Francis Ricci 2017-04-19 14:00:42 +00:00
parent 2096fa4bf9
commit 14777f6977
1 changed files with 43 additions and 2 deletions
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45
compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_mac.cc
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@ -48,6 +48,29 @@ void StopTheWorld(StopTheWorldCallback callback, void *argument) {
CHECK(0 && "unimplemented");
}
#if defined(__x86_64__)
typedef x86_thread_state64_t regs_struct;
#define SP_REG __rsp
#elif defined(__aarch64__)
typedef arm_thread_state64_t regs_struct;
# if __DARWIN_UNIX03
# define SP_REG __sp
# else
# define SP_REG sp
# endif
#elif defined(__i386)
typedef x86_thread_state32_t regs_struct;
#define SP_REG __esp
#else
#error "Unsupported architecture"
#endif
tid_t SuspendedThreadsListMac::GetThreadID(uptr index) const {
CHECK_LT(index, threads_.size());
return threads_[index].tid;
@ -83,8 +106,26 @@ void SuspendedThreadsListMac::Append(thread_t thread) {
PtraceRegistersStatus SuspendedThreadsListMac::GetRegistersAndSP(
uptr index, uptr *buffer, uptr *sp) const {
CHECK(0 && "unimplemented");
return REGISTERS_UNAVAILABLE_FATAL;
thread_t thread = GetThread(index);
regs_struct regs;
int err;
mach_msg_type_number_t reg_count = MACHINE_THREAD_STATE_COUNT;
err = thread_get_state(thread, MACHINE_THREAD_STATE, (thread_state_t)&regs,
&reg_count);
if (err != KERN_SUCCESS) {
VReport(1, "Error - unable to get registers for a thread\n");
// KERN_INVALID_ARGUMENT indicates that either the flavor is invalid,
// or the thread does not exist. The other possible error case,
// MIG_ARRAY_TOO_LARGE, means that the state is too large, but it's
// still safe to proceed.
return err == KERN_INVALID_ARGUMENT ? REGISTERS_UNAVAILABLE_FATAL
: REGISTERS_UNAVAILABLE;
}
internal_memcpy(buffer, &regs, sizeof(regs));
*sp = regs.SP_REG;
return REGISTERS_AVAILABLE;
}
uptr SuspendedThreadsListMac::RegisterCount() const {