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* Enable truncation of module rangesJoshua Peraza2019-06-111-10/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ELF modules are loaded in memory in several, possibly discontiguous, segments. If the holes between segments are large enough, other things, possibly other ELF modules may be mapped in that space. Crashpad records the range of modules as the base address of the lowest mapped segment to the high address of the highest mapped segment. This means that when one module is mapped into a hole in another, it appears to the Breakpad processor as overlapping modules. Module ranges are relevant to the Breakpad processor during stackwalking for identifying which module a particular program counter belongs to (i.e. mapping the address to a module's text segment). This patch addresses this issue of overlapping modules by truncating the range of the module with the lower base address. A typical module's text segment is the first loaded segment which would leave the text segment range unaffected. Module producers can restrict the size of holes in their ELF modules with the flag "-Wl,-z,max-page-size=4096", preventing other modules from being mapped in their address range. Properly contemplating ELF module address ranges would require extensions to the minidump format to encode any holes. crbug.com/crashpad/298 This patch also renames the concept of "shrinking down" (which truncated the upper of two overlapping ranges) to "truncate upper". Change-Id: I4599201f1e43918db036c390961f8b39e3af1849 Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1646932 Reviewed-by: Mark Mentovai <mark@chromium.org>
* Server-side workaround to handle overlapping modules.Ivan Penkov2016-06-201-0/+1
| | | | | | | | | | | | | | This change is resolving an issue that was caused by the combination of: - Android system libraries being relro packed in N+. - Breakpad dealing with relro packed libraries in a hack way. This is a fix for http://crbug/611824. I also found an use-after-free issue (bug in Minidump::SeekToStreamType). I disallowed the MinidumpStreamInfo copy and assign constructors and the compiler detected another similar issue in Minidump::Print. Then I disabled the copy and assign constructors for most classes in minidump.h (just in case). There are a couple of classes where I couldn't disallow them (since assign is used). This will require a small refactor so I left it out of this CL. R=mark@chromium.org Review URL: https://codereview.chromium.org/2060663002 .
* Adding support for overlapping ranges to RangeMap.Ivan Penkov2016-06-051-19/+47
| | | | | | | | | | When enabled, adding of a new range that overlaps with an existing one can be a successful operation. The range which ends at the higher address will be shrunk down by moving its start position to a higher address so that it does not overlap anymore. This change is required to fix http://crbug/611824. The actual fix will come in a separate CL. R=mmandlis@chromium.org Review URL: https://codereview.chromium.org/2029953003 .
* FastSourceLineResolver implementation for optimization purpose.SiyangXie@gmail.com2010-10-211-0/+1
| | | | git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@719 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Add static version of map wrappers and corresponding serializers.SiyangXie@gmail.com2010-10-151-0/+5
| | | | git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@714 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Add logging to minidump processor (#82). Part 2: add messages to the rest ofmmentovai2007-05-211-6/+5
| | | | | | | | | the processor. r=ted.mielczarek http://groups.google.com/group/google-breakpad-dev/browse_thread/thread/cf56b767383a5d4b git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@172 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Rename Airbag to Breakpad.mmentovai2007-02-141-2/+2
| | | | git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@122 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Module API (#32). r=waylonis, brynermmentovai2006-12-051-0/+14
| | | | | | | | | | | | | | | | | | | - Introduces a standard API for dealing with modules. MinidumpModule is now a concrete implementation of this API. Code may interact with single modules using the CodeModule interface, and collections of modules using its container, the CodeModules interface. - CodeModule is used directly by SymbolSupplier implementations and SourceLineResolver. Reliance on the specific implementation in MinidumpModule has been eliminated. - Module lists are now added to ProcessState objects. Module references in each stack frame are now pointers to objects in these module lists. - The sample minidump_stackwalk tool prints the module list after printing all threads' stacks. http://groups.google.com/group/airbag-dev/browse_frm/thread/a9c0550edde54cf8 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@74 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Add PUBLIC support to SourceLineResolver (resolve function names in Windowsmmentovai2006-10-201-1/+13
| | | | | | | | | | | system libraries) (#53) StackFrame::function_base is not populated (#49) r=bryner http://groups.google.com/group/airbag-dev/browse_thread/thread/a17d35348e7027bb git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@43 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Relicense to BSD (#29). r=brynermmentovai2006-09-201-10/+25
| | | | | | | http://groups.google.com/group/airbag-dev/browse_thread/thread/5f19f13fc172c4e0 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@31 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Handle frame pointer omission (#21), part 1: ContainedRangeMap. r=bryner.mmentovai2006-09-201-69/+2
| | | | | | | | | | | | | - ContainedRangeMap is the data structure that will be used to store and look up debugging information for frames by instruction address. The debugging information includes a way to locate the calling frame in the absence of a saved frame pointer. - Restructure RangeMap into an -inl file to match ContainedRangeMap. http://groups.google.com/group/airbag-dev/browse_thread/thread/c5823bfc1828ed42 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@29 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Stylistic changes for RangeMap (#24). r=brynermmentovai2006-09-141-20/+15
| | | | | | | http://groups.google.com/group/airbag-dev/browse_thread/thread/97c378bd175ab7c0 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@25 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Make SourceLineResolver use RangeMap (#13). r=brynermmentovai2006-09-081-2/+2
| | | | | | | | | | | | | | | - Eliminate MemAddrMap from source_line_resolver.cc and adapt it to use RangeMap, also used by minidump.cc. - RangeMap operates on both a base address and a size, where MemAddrMap only used a base address, so the dumped symbol file format is modified to include size information. dump_syms produces these files and SourceLineResolver consumes them. - Provide updated test data conforming to the new dumped symbol format. http://groups.google.com/group/airbag-dev/browse_thread/thread/e9403cf3ad6336a1 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@21 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Conform to style guidelines.mmentovai2006-09-071-44/+44
| | | | | | | | | | | | - In class definitions, one-space indent for public/protected/private. - Multi-line initializer format puts comma at end of line. Also: - Eliminate the long list of friends in Minidump by making swap() public. (People who need to access unknown stream types directly will need access to swap() too.) git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@16 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Initial implementation of minidump reader (#6). r=brynermmentovai2006-09-061-0/+158
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@11 4c0a9323-5329-0410-9bdc-e9ce6186880e
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