diff options
| author | David Spickett <david.spickett@linaro.org> | 2021-02-19 15:32:09 +0000 |
|---|---|---|
| committer | David Spickett <david.spickett@linaro.org> | 2021-06-24 15:43:20 +0100 |
| commit | 8d58fbd09efb443d92842a0d101348cda06d7253 (patch) | |
| tree | fc57fbc0f45425718fabe537a7bea3632ca633f5 /lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp | |
| parent | d57a5879ab6781a58020d3a878c617266d939e51 (diff) | |
[lldb][AArch64] Add memory-tagging qSupported feature
This feature "memory-tagging+" indicates that lldb-server
supports memory tagging packets. (added in a later patch)
We check HWCAP2_MTE to decide whether to enable this
feature for Linux.
Reviewed By: omjavaid
Differential Revision: https://reviews.llvm.org/D97282
Diffstat (limited to 'lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp index 62c2a725779e..2d53972b69b7 100644 --- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp +++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp @@ -53,11 +53,20 @@ #include <sys/user.h> #include <sys/wait.h> +#ifdef __aarch64__ +#include <asm/hwcap.h> +#include <sys/auxv.h> +#endif + // Support hardware breakpoints in case it has not been defined #ifndef TRAP_HWBKPT #define TRAP_HWBKPT 4 #endif +#ifndef HWCAP2_MTE +#define HWCAP2_MTE (1 << 18) +#endif + using namespace lldb; using namespace lldb_private; using namespace lldb_private::process_linux; @@ -283,8 +292,17 @@ NativeProcessLinux::Factory::Attach( NativeProcessLinux::Extension NativeProcessLinux::Factory::GetSupportedExtensions() const { - return Extension::multiprocess | Extension::fork | Extension::vfork | - Extension::pass_signals | Extension::auxv | Extension::libraries_svr4; + NativeProcessLinux::Extension supported = + Extension::multiprocess | Extension::fork | Extension::vfork | + Extension::pass_signals | Extension::auxv | Extension::libraries_svr4; + +#ifdef __aarch64__ + // At this point we do not have a process so read auxv directly. + if ((getauxval(AT_HWCAP2) & HWCAP2_MTE)) + supported |= Extension::memory_tagging; +#endif + + return supported; } // Public Instance Methods |