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Make it easier to use DwarfContext with MCJIT

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Summary:
This supersedes http://reviews.llvm.org/D4010, hopefully properly
dealing with the JIT case and also adds an actual test case.
DwarfContext was basically already usable for the JIT (and back when
we were overwriting ELF files it actually worked out of the box by
accident), but in order to resolve relocations correctly it needs
to know the load address of the section.
Rather than trying to get this out of the ObjectFile or requiring
the user to create a new ObjectFile just to get some debug info,
this adds the capability to pass in that info directly.
As part of this I separated out part of the LoadedObjectInfo struct
from RuntimeDyld, since it is now required at a higher layer.

Reviewers: lhames, echristo

Reviewed By: echristo

Subscribers: vtjnash, friss, rafael, llvm-commits

Differential Revision: http://reviews.llvm.org/D6961

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237961 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Keno Fischer
2015-05-21 21:24:32 +00:00
parent 6777be3446
commit b6976af3cd
17 changed files with 199 additions and 32 deletions
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10
include/llvm/Object/ObjectFile.h
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@ -32,6 +32,8 @@ class MachOObjectFile;
class SymbolRef;
class symbol_iterator;
class SectionRef;
typedef content_iterator<SectionRef> section_iterator;
/// RelocationRef - This is a value type class that represents a single
/// relocation in the list of relocations in the object file.
@ -51,6 +53,7 @@ public:
std::error_code getAddress(uint64_t &Result) const;
std::error_code getOffset(uint64_t &Result) const;
symbol_iterator getSymbol() const;
section_iterator getSection() const;
std::error_code getType(uint64_t &Result) const;
/// @brief Indicates whether this relocation should hidden when listing
@ -76,8 +79,6 @@ typedef content_iterator<RelocationRef> relocation_iterator;
/// SectionRef - This is a value type class that represents a single section in
/// the list of sections in the object file.
class SectionRef;
typedef content_iterator<SectionRef> section_iterator;
class SectionRef {
friend class SymbolRef;
DataRefImpl SectionPimpl;
@ -247,6 +248,7 @@ protected:
virtual std::error_code getRelocationOffset(DataRefImpl Rel,
uint64_t &Res) const = 0;
virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const = 0;
virtual section_iterator getRelocationSection(DataRefImpl Rel) const = 0;
virtual std::error_code getRelocationType(DataRefImpl Rel,
uint64_t &Res) const = 0;
virtual std::error_code
@ -467,6 +469,10 @@ inline symbol_iterator RelocationRef::getSymbol() const {
return OwningObject->getRelocationSymbol(RelocationPimpl);
}
inline section_iterator RelocationRef::getSection() const {
return OwningObject->getRelocationSection(RelocationPimpl);
}
inline std::error_code RelocationRef::getType(uint64_t &Result) const {
return OwningObject->getRelocationType(RelocationPimpl, Result);
}