f66b69a392
LLDB uses mangled name to construct a fully qualified name for global
variables. Sometimes DW_TAG_linkage_name attribute is missing from
debug info, so LLDB has to rely on parent entries to construct the
fully qualified name.
Currently, the fallback is handled when the parent DW_TAG is either
DW_TAG_compiled_unit or DW_TAG_partial_unit, which may not work well
for global constants in namespaces. For example:
namespace ns {
const int x = 10;
}
may produce the following debug info:
<1><2a>: Abbrev Number: 2 (DW_TAG_namespace)
<2b> DW_AT_name : (indirect string, offset: 0x5e): ns
<2><2f>: Abbrev Number: 3 (DW_TAG_variable)
<30> DW_AT_name : (indirect string, offset: 0x61): x
<34> DW_AT_type : <0x3c>
<38> DW_AT_decl_file : 1
<39> DW_AT_decl_line : 2
<3a> DW_AT_const_value : 10
Since the fallback didn't handle the case when parent tag is
DW_TAG_namespace, LLDB wasn't able to match the variable by its fully
qualified name "ns::x". This change fixes this by additional check
if the parent is a DW_TAG_namespace.
Reviewed By: werat, clayborg
Differential Revision: https://reviews.llvm.org/D112147
18 lines
372 B
C++
18 lines
372 B
C++
#include <stdio.h>
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namespace abc {
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int g_file_global_int = 42;
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const int g_file_global_const_int = 1337;
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namespace {
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const int g_anon_namespace_const_int = 100;
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}
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}
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int main (int argc, char const *argv[])
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{
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int unused = abc::g_file_global_const_int;
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int unused2 = abc::g_anon_namespace_const_int;
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return abc::g_file_global_int; // Set break point at this line.
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}
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