forked from OSchip/llvm-project
457b7f14b9
Summary: When we see a compilation unit with continuous range on input, it has two attributes: DW_AT_low_pc and DW_AT_high_pc. We convert the range to a non-continuous one and change the attributes to DW_AT_ranges and DW_AT_producer. However, gdb seems to expect every compilation unit to have a base address specified via DW_AT_low_pc, even when its value is always 0. Otherwise gdb will not show proper debug info for such modules. With this diff we produce DW_AT_ranges followed by DW_AT_low_pc. The problem is that the first attribute takes DW_FORM_sec_offset which is exactly 4 bytes, and in many cases we are left with 12 bytes to fill in. We used to fill this space with DW_AT_producer, which took an arbitrary-length field. For DW_AT_low_pc we can use a trick of using DW_FORM_udata (unsigned ULEB128 encoded integer) which can take up to 12 bytes, even when the value is 0. (cherry picked from FBD5109798) |
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| .. | ||
| Passes | ||
| merge-fdata | ||
| BinaryBasicBlock.cpp | ||
| BinaryBasicBlock.h | ||
| BinaryContext.cpp | ||
| BinaryContext.h | ||
| BinaryFunction.cpp | ||
| BinaryFunction.h | ||
| BinaryLoop.h | ||
| BinaryPassManager.cpp | ||
| BinaryPassManager.h | ||
| BinaryPasses.cpp | ||
| BinaryPasses.h | ||
| CMakeLists.txt | ||
| DWARFRewriter.cpp | ||
| DataReader.cpp | ||
| DataReader.h | ||
| DebugData.cpp | ||
| DebugData.h | ||
| Exceptions.cpp | ||
| Exceptions.h | ||
| LLVMBuild.txt | ||
| README.md | ||
| ReorderAlgorithm.cpp | ||
| ReorderAlgorithm.h | ||
| RewriteInstance.cpp | ||
| RewriteInstance.h | ||
| llvm-bolt.cpp | ||