diff options
Diffstat (limited to 'source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h')
| -rw-r--r-- | source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h | 188 |
1 files changed, 84 insertions, 104 deletions
diff --git a/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h b/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h index 6a82fce35bf7..4a2555ac61a2 100644 --- a/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h +++ b/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h @@ -14,116 +14,96 @@ // C++ Includes // Other libraries and framework includes // Project includes -#include "lldb/lldb-private.h" -#include "lldb/Target/ABI.h" #include "lldb/Core/Value.h" - -class ABIMacOSX_i386 : - public lldb_private::ABI -{ +#include "lldb/Target/ABI.h" +#include "lldb/lldb-private.h" + +class ABIMacOSX_i386 : public lldb_private::ABI { public: - ~ABIMacOSX_i386() override = default; - - size_t - GetRedZoneSize() const override; - - bool - PrepareTrivialCall(lldb_private::Thread &thread, - lldb::addr_t sp, - lldb::addr_t func_addr, - lldb::addr_t return_addr, - llvm::ArrayRef<lldb::addr_t> args) const override; - - bool - GetArgumentValues(lldb_private::Thread &thread, - lldb_private::ValueList &values) const override; - - lldb_private::Error - SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value) override; - - bool - CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; - - bool - CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; - - bool - RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override; - - // The Darwin i386 ABI requires that stack frames be 16 byte aligned. - // When there is a trap handler on the stack, e.g. _sigtramp in userland - // code, we've seen that the stack pointer is often not aligned properly - // before the handler is invoked. This means that lldb will stop the unwind - // early -- before the function which caused the trap. - // - // To work around this, we relax that alignment to be just word-size (4-bytes). - // Whitelisting the trap handlers for user space would be easy (_sigtramp) but - // in other environments there can be a large number of different functions - // involved in async traps. - // - // If we were to enforce 16-byte alignment, we also need to relax to 4-byte - // alignment for non-darwin i386 targets. - bool - CallFrameAddressIsValid(lldb::addr_t cfa) override - { - // Make sure the stack call frame addresses are are 4 byte aligned - if (cfa & (4ull - 1ull)) - return false; // Not 4 byte aligned - if (cfa == 0) - return false; // Zero is not a valid stack address - return true; - } - - bool - CodeAddressIsValid(lldb::addr_t pc) override - { - // Just make sure the address is a valid 32 bit address. - return pc <= UINT32_MAX; - } - - const lldb_private::RegisterInfo * - GetRegisterInfoArray(uint32_t &count) override; - - //------------------------------------------------------------------ - // Static Functions - //------------------------------------------------------------------ - - static void - Initialize(); - - static void - Terminate(); - - static lldb::ABISP - CreateInstance (const lldb_private::ArchSpec &arch); - - //------------------------------------------------------------------ - // PluginInterface protocol - //------------------------------------------------------------------ - - static lldb_private::ConstString - GetPluginNameStatic (); - - lldb_private::ConstString - GetPluginName() override; - - uint32_t - GetPluginVersion() override; - + ~ABIMacOSX_i386() override = default; + + size_t GetRedZoneSize() const override; + + bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp, + lldb::addr_t func_addr, lldb::addr_t return_addr, + llvm::ArrayRef<lldb::addr_t> args) const override; + + bool GetArgumentValues(lldb_private::Thread &thread, + lldb_private::ValueList &values) const override; + + lldb_private::Error + SetReturnValueObject(lldb::StackFrameSP &frame_sp, + lldb::ValueObjectSP &new_value) override; + + bool + CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; + + bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; + + bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override; + + // The Darwin i386 ABI requires that stack frames be 16 byte aligned. + // When there is a trap handler on the stack, e.g. _sigtramp in userland + // code, we've seen that the stack pointer is often not aligned properly + // before the handler is invoked. This means that lldb will stop the unwind + // early -- before the function which caused the trap. + // + // To work around this, we relax that alignment to be just word-size + // (4-bytes). + // Whitelisting the trap handlers for user space would be easy (_sigtramp) but + // in other environments there can be a large number of different functions + // involved in async traps. + // + // If we were to enforce 16-byte alignment, we also need to relax to 4-byte + // alignment for non-darwin i386 targets. + bool CallFrameAddressIsValid(lldb::addr_t cfa) override { + // Make sure the stack call frame addresses are are 4 byte aligned + if (cfa & (4ull - 1ull)) + return false; // Not 4 byte aligned + if (cfa == 0) + return false; // Zero is not a valid stack address + return true; + } + + bool CodeAddressIsValid(lldb::addr_t pc) override { + // Just make sure the address is a valid 32 bit address. + return pc <= UINT32_MAX; + } + + const lldb_private::RegisterInfo * + GetRegisterInfoArray(uint32_t &count) override; + + //------------------------------------------------------------------ + // Static Functions + //------------------------------------------------------------------ + + static void Initialize(); + + static void Terminate(); + + static lldb::ABISP CreateInstance(const lldb_private::ArchSpec &arch); + + //------------------------------------------------------------------ + // PluginInterface protocol + //------------------------------------------------------------------ + + static lldb_private::ConstString GetPluginNameStatic(); + + lldb_private::ConstString GetPluginName() override; + + uint32_t GetPluginVersion() override; + protected: - lldb::ValueObjectSP - GetReturnValueObjectImpl(lldb_private::Thread &thread, - lldb_private::CompilerType &ast_type) const override; + lldb::ValueObjectSP + GetReturnValueObjectImpl(lldb_private::Thread &thread, + lldb_private::CompilerType &ast_type) const override; - bool - RegisterIsCalleeSaved (const lldb_private::RegisterInfo *reg_info); + bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info); private: - ABIMacOSX_i386() : - lldb_private::ABI() - { - // Call CreateInstance instead. - } + ABIMacOSX_i386() : lldb_private::ABI() { + // Call CreateInstance instead. + } }; #endif // liblldb_ABIMacOSX_i386_h_ |