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475 commits

Author SHA1 Message Date
kcbanner
5b86180ae3 debug: support looking up debug symbols in both PDB and DWARF debug info, instead of only using DWARF if .debug_info is present 
coff: support reading from memory loaded by the loader, or a mapped file
 2023-08-15 10:20:11 -04:00
Zachary Raineri
49244dc0ca
std: remove some unused imports (#16710) 2023-08-06 15:18:50 -04:00
David Gonzalez Martin
9c05810be6 debug: expose module debug info deinitialization 
Before this commit, you could use readElfDebugInfo independently with
one catch: the data is not freed since the deinitialization functions
for ModuleDebugInfo are private. This change makes them public so the
    users of such function and similar can free the memory after the
    debug symbols have been used.
 2023-08-04 09:24:11 +02:00
kcbanner
78449b6d98 debug: skip unwind error printing on platforms that don't have_ucontext 2023-07-26 22:10:22 -04:00
kcbanner
a84826115f debug: print unwind errors if they occur on the first iteration, and differentiate between missing info and an actual unwind error in the message 2023-07-26 20:58:29 -04:00
kcbanner
b1d86db7b4 dwarf: move macho unwind code from macho -> dwarf 
dwarf: fixup unchecked .eh_frame CIE offset subtraction
 2023-07-20 22:58:16 -04:00
kcbanner
8e6a62ba10 test: disable omit_frame_pointer unwinding tests on aarch64-macos 
dwarf: handle signal frame CIE flag
 2023-07-20 22:58:16 -04:00
kcbanner
6d87bb370a debug: disable the new unwinder on aarch64-macos 2023-07-20 22:58:16 -04:00
kcbanner
97bda56306 macho: don't scan all eh_frame entries, instead follow the offset from the __unwind_info directly 2023-07-20 22:58:16 -04:00
kcbanner
774dc2fdb7 dwarf: add explicit_fde_offset to support more optimal __unwind_info dwarf lookups 2023-07-20 22:58:16 -04:00
kcbanner
2c76020e77 debug: load the macho unwind sections from the already-mapped image 2023-07-20 22:58:16 -04:00
kcbanner
618b0eb3d3 dwarf: fixup integer overflow in readEhPointer 
debug: handle the possibility of eh_frame / debug_frame being mapped in memory or loaded from disk
 2023-07-20 22:58:16 -04:00
kcbanner
5e399d97d7 use eh_frame from the mapped binary if available 2023-07-20 22:58:16 -04:00
kcbanner
9549b4acf6 debug: fixup an inconsistency in the getcontext implementation on aarch64-macos 2023-07-20 22:58:16 -04:00
kcbanner
b18031335a dwarf: use cie.return_address_register instead of assuming it's in the IP register 2023-07-20 22:58:16 -04:00
kcbanner
9b25bee42c debug: fixup have_getcontext 2023-07-20 22:58:15 -04:00
kcbanner
e5aa2bb224 debug: fixup last_error being printed too many times 2023-07-20 22:58:15 -04:00
kcbanner
891fa3b8b5 debug: fix initialization of the optional fields on StackIterator 
dwarf: documentation fixups
target: enable unwind tables on macho
 2023-07-20 22:58:15 -04:00
kcbanner
5dfb159e15 macho: add aarch64 implementation to unwindFrame 
dwarf: map the V registers in abi.regBytes
test: add test case that exercises the stack-indirect __unwind_info mode in x86_64
 2023-07-20 22:58:15 -04:00
kcbanner
203d96ae97 debug: add relocateContext 
dwarf: fixup tests that used a ThreadContext
 2023-07-20 22:58:15 -04:00
kcbanner
94354aa6aa macho: add unwindFrame which can unwind stack frames using the __unwind_info section 
dwarf: fixup missing error
 2023-07-20 22:58:15 -04:00
kcbanner
d226b74ae8 dwarf: add ExpressionError to work around the compiler not being able to infer it 
dwarf: implement OP.entry_value, add tests
 2023-07-20 22:58:15 -04:00
kcbanner
21d0154139 dwarf: skip register tests on unimplemented arch / os, add tests for type convesions 
debug: dupeContext -> copyContext
 2023-07-20 22:58:15 -04:00
kcbanner
54ca62fef4 dwarf: fixup regBytes for the case where there is no context support 
expressions: add more tests, fix tests for mipsel
debug: add lookupModuleName implementation for macos
 2023-07-20 22:58:15 -04:00
kcbanner
5c0d4cef1a debug: add dupeContext, store a pointer to a copy of ThreadContext on UnwindContext 2023-07-20 22:58:15 -04:00
kcbanner
5f72c6508d debug: rename StackTraceContext to ThreadContext 
dwarf: use ThreadContext instead of os.ucontext_t
dwarf: add regBytes impl for windows
dwarf: fixup expression types for non-native
 2023-07-20 22:58:15 -04:00
kcbanner
ad5f74c0b1 dwarf: introduce ExpressionContext, add more expression opcodes 2023-07-20 22:58:14 -04:00
kcbanner
576ffaa329 darwin: update mcontext_t definition for aarch64 to add neon state 2023-07-20 22:58:14 -04:00
kcbanner
412cd789bf debug: fixup base address calculations for macho 
dwarf: fixup x86 register mapping logic
dwarf: change the register context update to update in-place instead of copying
debug: always print the unwind error type
 2023-07-20 22:58:14 -04:00
kcbanner
b85f84061a dwarf: don't dupe function names, as they are backed by the memory mapped sections 
dwarf: const-correctness fixups
dwarf: implement the remaining register rules
dwarf: start implmenting the DWARF expression stack machine
 2023-07-20 22:58:14 -04:00
kcbanner
62598c2187 debug: rework how unwind errors are printed, and add module name lookup for linux 
This change enhances stack trace output to include a note that debug info was missing,
and therefore the stack trace may not be accurate. For example, if the user is using a libc
compiled with -fomit-frame-pointer and doesn't have debug symbols installed, any traces
that begin in a libc function may not unwind correctly. This allows the user to notice this and
potentially install debug symbols to improve the output.
 2023-07-20 22:58:14 -04:00
kcbanner
6a5e2b713f debug: de-duplicate some code in macos ModuleDebugInfo 2023-07-20 22:58:14 -04:00
kcbanner
ccc9f82068 c: fixup getcontext 
debug: supports_context -> have_ucontext, supports_getcontext -> have_getcontext
test: rework dwarf_unwind test case to also test the non-libc path
 2023-07-20 22:58:14 -04:00
kcbanner
23d9b59b86 c: add getcontext 
debug: make getContext public
 2023-07-20 22:58:14 -04:00
kcbanner
f991b9dc05 debug: fix reading -gdwarf generated debug sections in COFF files 
I had accidentally regressed support for -gdwarf in 461fb499f3 when I changed the logic to
use the already-mapped exe/dll image instead of loading it from disk. The string table is mapped as all zeroes by the loader,
so if a section header's name is longer than 8 bytes (like the ones generated by -gdwarf), then the name can't be read.

Now, if any section headers require the string table, the file is mapped from disk.

windows: Add NtCreateSection/NtMapViewOfSection/NtUnmapViewOfSection
 2023-07-20 22:58:14 -04:00
kcbanner
caa334712f linux: rework getcontext to closer match the specification (saved IP/SP match the state after it would return) 
debug: fixup ucontext_t check
 2023-07-20 22:58:14 -04:00
kcbanner
89ef004646 debug: x86 unwinding support, more unwinding fixes 
- Fix unwindFrame using the previous FDE row instead of the current one
- Handle unwinding through noreturn functions
- Add x86-linux getcontext
- Fixup x86_64-linux getcontext not restoring the fp env
- Fix start_addr filtering on x86-windows
 2023-07-20 22:58:14 -04:00
kcbanner
5cd8ab2473 debug: enhance writeCurrentStackTrace to use context-based unwinding when available 2023-07-20 22:58:14 -04:00
kcbanner
6abf1fbfe6 update to new builtin syntax 2023-07-20 22:58:14 -04:00
kcbanner
a47212c72e - rebase and update to lastest master 2023-07-20 22:58:13 -04:00
kcbanner
5781016c35 dwarf: add support for .eh_frame_hdr when unwinding 
- .eh_frame_hdr contains a binary-searchable data structure for finding an FDE. If present, we can use this
section to avoid having to parse the entire FDE/CIE list in the binary, instead only entries that are actually
required for unwinding are read.
- rework the inputs pc-relative pointer decoding to support both already-mapped sections as well as sections
mapped from a file
- store the VirtualMachine on UnwindContext so the allocations can be reused
 2023-07-20 22:58:13 -04:00
kcbanner
dd2035735f debug: fix memory leak when an error occurs opening a pdb file 2023-07-20 22:58:13 -04:00
kcbanner
865d4d2d8c debug: more fixups for mips linux not having ucontext_t 
- increase test-std max_rss to 1.1 above the CI observed amount
 2023-07-20 22:58:13 -04:00
kcbanner
5ebca4392e debug: fixing more compile errors on arches that I hadn't tested on yet 2023-07-20 22:58:13 -04:00
kcbanner
2f75d20d87 debug: use an explicit context type instead of anytype for dumpStackTraceFromBase, update crash_report to use this for exceptions 2023-07-20 22:58:13 -04:00
kcbanner
d1a9bb1fea debug: fixup context detection for wasi 2023-07-20 22:58:13 -04:00
kcbanner
a325d7f6d1 fmt and cleanup 2023-07-20 22:58:13 -04:00
kcbanner
e72e762d1e dwarf: implement more register mappings, fix up macos compile 2023-07-20 22:58:13 -04:00
kcbanner
9145ff7da0 dwarf: implement more register number mappings 
- add dwarf.abi.RegisterContext to handle register numbers changing based on DWARF format
 2023-07-20 22:58:13 -04:00
kcbanner
b449d98a93 - rework StackIterator to optionally use debug_info to unwind the stack 
- add abi routines for getting register values
- unwding is working!
 2023-07-20 22:58:13 -04:00