Hi all,
I was investigating a bug when I saw something suspicious in:
StackFrame.cpp:38
// The first bits in the flags are reserved for the SymbolContext::Scope bits
// so we know if we have tried to look up information in our internal symbol
// context (m_sc) already.
#define RESOLVED_FRAME_CODE_ADDR (uint32_t(eSymbolContextEverything + 1))
#define RESOLVED_FRAME_ID_SYMBOL_SCOPE (RESOLVED_FRAME_CODE_ADDR << 1)
#define GOT_FRAME_BASE (RESOLVED_FRAME_ID_SYMBOL_SCOPE << 1)
#define RESOLVED_VARIABLES (GOT_FRAME_BASE << 1)
#define RESOLVED_GLOBAL_VARIABLES (RESOLVED_VARIABLES << 1)
lldb-enumerations.h:310
FLAGS_ENUM(SymbolContextItem)
{
eSymbolContextTarget = (1u << 0), ///< Set when \a target is
requested from a query, or was located in query results
eSymbolContextModule = (1u << 1), ///< Set when \a module is
requested from a query, or was located in query results
eSymbolContextCompUnit = (1u << 2), ///< Set when \a comp_unit is
requested from a query, or was located in query results
eSymbolContextFunction = (1u << 3), ///< Set when \a function is
requested from a query, or was located in query results
eSymbolContextBlock = (1u << 4), ///< Set when the deepest \a
block is requested from a query, or was located in query results
eSymbolContextLineEntry = (1u << 5), ///< Set when \a line_entry is
requested from a query, or was located in query results
eSymbolContextSymbol = (1u << 6), ///< Set when \a symbol is
requested from a query, or was located in query results
eSymbolContextEverything = ((eSymbolContextSymbol << 1) - 1u), ///<
Indicates to try and lookup everything up during a routine symbol context query.
eSymbolContextVariable = (1u << 7) ///< Set when \a global or static
variable is requested from a query, or was located in query results.
///< eSymbolContextVariable is
potentially expensive to lookup so it isn't included in
///< eSymbolContextEverything
which stops it from being used during frame PC lookups and
///< many other potential address
to symbol context lookups.
};
So, both RESOLVED_FRAME_CODE_ADDR and eSymbolContextVariable have the same
value (0x80).
-Martin
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