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Bug 1480706 - Enable Frame-pointer chasing on x86. r=sewardj

This commit is contained in:
Mike Hommey 2018-08-07 18:50:10 +09:00
Родитель 0a587aa443
Коммит d2a1113cc2
1 изменённых файлов: 3 добавлений и 5 удалений
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8
tools/profiler/lul/LulMain.cpp
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@ -1421,11 +1421,9 @@ LUL::Unwind(/*OUT*/uintptr_t* aFramePCs,
} }
#if defined(GP_PLAT_amd64_linux) #if defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_x86_linux)
// There's no RuleSet for the specified address. On amd64_linux, see if // There's no RuleSet for the specified address. On amd64/x86_linux, see if
// it's possible to recover the caller's frame by using the frame pointer. // it's possible to recover the caller's frame by using the frame pointer.
// This would probably work for the 32-bit case too, but hasn't been
// tested for that case.
// We seek to compute (new_IP, new_SP, new_BP) from (old_BP, stack image), // We seek to compute (new_IP, new_SP, new_BP) from (old_BP, stack image),
// and assume the following layout: // and assume the following layout:
@ -1473,7 +1471,7 @@ LUL::Unwind(/*OUT*/uintptr_t* aFramePCs,
} }
} }
} }
#endif // defined(GP_PLAT_amd64_linux) #endif // defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_x86_linux)
// We failed to recover a frame either using CFI or FP chasing, and we // We failed to recover a frame either using CFI or FP chasing, and we
// have no other ways to recover the frame. So we have to give up. // have no other ways to recover the frame. So we have to give up.