4 Commits

Author SHA1 Message Date
Tamas Berghammer
022622f1d4 Improve conditional opcode handling in emulation based unwinding
Don't chane the CFI information when a conditional instruction
is emulated (eg.: popeq {r0, pc}) because the CFI for the next
instruction should be the same as the CFI for the current instruction.

Differential revision: http://reviews.llvm.org/D11258

llvm-svn: 242519
2015-07-17 11:44:14 +00:00
Tamas Berghammer
f366af309a Ignore "push/pop {sp}" in emulation based unwinding
These instructions confusing the unwind code because in case of a
push it assumes that the original valu of a register is pushed to
the stack what is not neccessarily true in case of SP. The same is
true for the pop (in the opposite way).

Differential revision: http://reviews.llvm.org/D10806

llvm-svn: 241051
2015-06-30 09:35:46 +00:00
Tamas Berghammer
67ec5458a7 Add branch emulation to aarch64 instruction emulator
The emulation of the branches are required by the new stack
unwinding logic to reinstantiate the prologue at the right place.

Differential revision: http://reviews.llvm.org/D10702

llvm-svn: 240769
2015-06-26 09:41:32 +00:00
Tamas Berghammer
8b29af1427 Add new test for stress testing stack unwinding
This test case generates new tests from the source files dropped into
its directory. For stress testing stack unwinding it steps through the
code line by line and then tests unwinding from each instruction.

llvm-svn: 240030
2015-06-18 17:17:32 +00:00