https://github.com/DavidSpickett created https://github.com/llvm/llvm-project/pull/159523
uintptr_t is usually a good idea when handling pointers, but lldb has to handle 64-bit addresses that might be from a remote system, on a 32-bit system. So I've changed a few instances here to use addr_t which is 64-bit everywhere. Before we got: https://lab.llvm.org/buildbot/#/builders/18/builds/21247 ``` ../llvm-project/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp:81:28: error: constexpr variable 'g_mte_tag_mask' must be initialized by a constant expression 81 | static constexpr uintptr_t g_mte_tag_mask = (uintptr_t)0x0f << g_mte_tag_shift; | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../llvm-project/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp:81:61: note: shift count 56 >= width of type 'uintptr_t' (aka 'unsigned int') (32 bits) 81 | static constexpr uintptr_t g_mte_tag_mask = (uintptr_t)0x0f << g_mte_tag_shift; | ^ 1 error generated. ``` >From 51dc720f818333980580bead376bcf5ec1f4ff75 Mon Sep 17 00:00:00 2001 From: David Spickett <david.spick...@linaro.org> Date: Thu, 18 Sep 2025 09:53:36 +0100 Subject: [PATCH] [lldb] Correct 32-bit build failure in StopInfoMachException.cpp uintptr_t is usually a good idea when handling pointers, but lldb has to handle 64-bit addresses that might be from a remote system, on a 32-bit system. So I've changed a few instances here to use addr_t which is 64-bit everywhere. Before we got: https://lab.llvm.org/buildbot/#/builders/18/builds/21247 ``` ../llvm-project/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp:81:28: error: constexpr variable 'g_mte_tag_mask' must be initialized by a constant expression 81 | static constexpr uintptr_t g_mte_tag_mask = (uintptr_t)0x0f << g_mte_tag_shift; | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../llvm-project/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp:81:61: note: shift count 56 >= width of type 'uintptr_t' (aka 'unsigned int') (32 bits) 81 | static constexpr uintptr_t g_mte_tag_mask = (uintptr_t)0x0f << g_mte_tag_shift; | ^ 1 error generated. ``` --- lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp b/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp index 6853121f3e01c..601cfdcb4e9f7 100644 --- a/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp +++ b/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp @@ -78,7 +78,7 @@ static void DescribeAddressBriefly(Stream &strm, const Address &addr, } static constexpr uint8_t g_mte_tag_shift = 64 - 8; -static constexpr uintptr_t g_mte_tag_mask = (uintptr_t)0x0f << g_mte_tag_shift; +static constexpr addr_t g_mte_tag_mask = (addr_t)0x0f << g_mte_tag_shift; bool StopInfoMachException::DetermineTagMismatch(ExecutionContext &exe_ctx) { const bool IsBadAccess = m_value == 1; // EXC_BAD_ACCESS @@ -97,7 +97,7 @@ bool StopInfoMachException::DetermineTagMismatch(ExecutionContext &exe_ctx) { m_exc_code, bad_address); const uint8_t tag = (bad_address & g_mte_tag_mask) >> g_mte_tag_shift; - const uint64_t canonical_addr = bad_address & ~g_mte_tag_mask; + const addr_t canonical_addr = bad_address & ~g_mte_tag_mask; strm.Printf( "Note: MTE tag mismatch detected: pointer tag=%d, address=0x%" PRIx64, tag, canonical_addr); _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
