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In Mac dump_syms, allow reading debug data out of both the Mach-O file and the dSYM.

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This adds a new |-g <dSYM path>| flag to dump_syms, to specify the dSYM path for
the target Mach-O argument. The UUIDs and architectures of the two paths must
match in order to dump symbols for this "split module."

This reason for this is that for x86_64 binaries on OS X, the CFI data is stored
in the __TEXT,__eh_frame segment of the Mach-O file, and the data is not copied
into the dSYM by dsymutil.  Therefore, just dumping the dSYM doesn't yield CFI
data for x86_64 files, and both the dSYM and the Mach-O file must be dumped in
order to produce a complete Breakpad symbol file. For i386 binaries, the CFI data
is stored in the __DWARF,__debug_frame segment, which is part of the dSYM, so
this isn't necessary.

BUG=https://code.google.com/p/chromium/issues/detail?id=393594
R=mark@chromium.org

Review URL: https://breakpad.appspot.com/6704002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1359 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
rsesek@chromium.org 2014-07-25 18:18:59 +00:00
parent dab50e6f6e
commit e2fffff1a4
3 changed files with 111 additions and 12 deletions
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7
src/common/module.h
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@ -247,7 +247,7 @@ class Module {
// effectively a copy of the stack frame entry list, this is mostly
// useful for testing; other uses should probably get
// a more appropriate interface.)
void GetStackFrameEntries(vector<StackFrameEntry *> *vec);
void GetStackFrameEntries(vector<StackFrameEntry *> *vec) const;
// Find those files in this module that are actually referred to by
// functions' line number data, and assign them source id numbers.
@ -270,6 +270,11 @@ class Module {
// established by SetLoadAddress.
bool Write(std::ostream &stream, SymbolData symbol_data);
string name() const { return name_; }
string os() const { return os_; }
string architecture() const { return architecture_; }
string identifier() const { return id_; }
private:
// Report an error that has occurred writing the symbol file, using
// errno to find the appropriate cause. Return false.