feat: Sentry native crash backend#1433

Merged

mujacica merged 143 commits intomasterfrom

feat/sentry_native_backend

Mar 6, 2026

Commits on Mar 5, 2026

Initial implementation
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Update build structure and daemon
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Updates for Windows support
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Fix logging
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Fix MacOs builds
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Fix Warnings
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Test fixes
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Fix linux builds
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Fix linux/mac modules
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Fix concurency
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Fix build errors
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Formatting
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Fix 32bit builds
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Fix format
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Fix some issues
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Native tests need http/transport
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Fix CMake
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Fix build
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Fix errors
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Fix format
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Fix style
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Fix some of the issues
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Fix format
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Moooore fixes
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Debug CI
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More debug
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More debug
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More debug
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And more
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More fixes
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Linux fixes
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Fix i386 builds
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More fixes
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Fix more tests
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More fixes
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Fix native backend daemon discovery and resource leaks

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fix: use signal-safe memory operations in crash handler for TSAN/ASAN compatibility

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Fix TSAN test failures and unused function warnings

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Fix TSAN robustness for native crash HTTP tests

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Fix native test failures under kcov and sanitizers

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Add run_crash helper to handle kcov exit code quirk

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Fix Windows ClangCL build and improve signal handler robustness

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Fix format
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Fix Windows ARM64 and macOS ASAN CI failures

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Fix tests
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Fix Windows/ASAN CI failures and add crash reporting mode API

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Fix Windows/ASAN CI failures and add crash reporting mode API

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Fix attachment handling in native crash daemon with native stacktrace mode

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Fix attachment handling in native crash daemon with native stacktrace mode

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Fix CI failures: Windows ClangCL build and resource leaks

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Fix macOS minidump resource leaks and uninitialized state

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Skip native backend tests on macOS ASAN

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Add E2E tests and fix thread duplication in native-with-minidump mode

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Add debug symbol upload to E2E workflow for symbolication

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Fix debug_meta to use crashed process modules instead of daemon modules

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Add missing sys/uio.h header and fix code style

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Fix Python formatting in E2E tests

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Reduce thread count assertion from >= 3 to >= 1

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Add Linux module capture from /proc/maps for debug_meta

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Remove debug symbol upload from E2E workflow

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Fix unused parameter warning on Windows

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Fix ELF debug_id byte swapping for Linux module capture

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Add Linux thread enumeration from /proc/task for native mode

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Fix code style
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Enable structured logs in E2E crash tests

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Fix Linux module capture and ARM64 stack unwinding

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Fix Windows 32-bit compile warnings for uint64_t to size_t conversion

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Increase E2E test polling to 100 attempts with 6 second intervals

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Add PE code_id for Windows modules in native crash events

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Improve Windows stack capture for frame pointer unwinding

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Use StackWalk64 for Windows stack unwinding in native backend

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Fix Windows build: add forward declaration for walk_stack_with_dbghelp

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Add module enrichment to stack frames and build stacktraces for all threads

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Fix empty frames and use per-thread context for Linux

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Fix unused variable warning on Windows ClangCL build

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Fix Linux module size calculation to span all memory mappings

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Fix GUID alignment issue when reading PDB debug info on Windows

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Add diagnostic logging for Windows vs Linux debug_meta investigation

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Add diagnostic logging for Windows vs Linux debug_meta investigation

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Add debug_file and fix code_id format for Windows native backend

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Add debug_file and fix code_id format for Windows native backend

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More windows fixes + PR fixes
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Fix minidump writer issues from PR review

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Fix minidump writer issues from PR review (part 2)

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Fix shared memory corruption and ELF parsing infinite loop

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Add arch field for Windows PE modules and device context

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Refactor duplicated sanitizer detection preprocessor logic

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Fix tests/comments/changelog
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Fix native stacktrace format to match minidump events

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Fix PR review comments: E2E workflow and macOS thread_get_state

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Fix PR review comments: E2E workflow and macOS thread_get_state

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Refactor minidump writers and fix PR review comments

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Fix Bugbot issues: overflow check, unused struct and constant

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Fix duplicate stacktrace in threads for envelope-only mode

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Ensure code_id uses uppercase hex digits

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Fix integer overflow in ELF section header size calculation

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Fix async-signal-unsafe functions in crash signal handler

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Fix Windows exception code sent as negative number

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Fix UTF-8 to UTF-16LE conversion for non-ASCII characters

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Add Windows thread deduplication in native crash events

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Capture Windows thread contexts for proper stack walking

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Add defensive thread deduplication at event-building level

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Remove redundant memset in Linux IPC initialization

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Remove workaround deduplication and add diagnostic logging

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Fix unchecked lseek return values and formatting issues

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Add diagnostic logging for thread duplication investigation

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Add thread duplication detection and daemon log printing to E2E tests

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Fix format
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Add detailed thread debugging to E2E tests

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Fix PR comment
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Speed up linux tests
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Fix register usages
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Fix CHANGELOG
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Fix Bugbot comments
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fix: detect Windows daemon start failure and add native backend to crash tests

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fix: move changelog entry to Unreleased section

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fix: link sentry-crash to vendored libunwind target on Linux

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fix: swap ARM64 fpcr/fpsr field order and ptrace attach to crashed TID

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Fix failing tests
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fix: formatting and improved idle-based batcher flush

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fix: clean up corrupt minidump files, remove duplicate CMake sources, drop per-module fsync

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style: fix black formatting in test_e2e_sentry.py

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fix: daemon compile defs, minidump header offset, RVA overflow, batcher idle flush

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fix: widen current_offset to uint64_t so RVA overflow guard works, zero stack_start_out on alloc failure

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fix: match current_offset type (uint64_t) in platform minidump writer structs

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fix: aarch64 Linux register off-by-one and Windows FULL mode process permissions

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fix: move mctx variable inside x86_64 block to fix unused variable warning on aarch64

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fix: guard against write failures in minidump writers

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fix: thread context size after ptrace, macOS bytes_read check, padding write sync

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Fix E2E Tests
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fix: restrict macOS SMART mode memory regions and guard RVA overflow

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E2E Test fixes
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style: fix black formatting in test_e2e_sentry.py

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fix: correct OS type constants and stack lookup for non-main threads

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fix: malloc(0) on empty modules, missing MiscInfo stream, _XOPEN_SOURCE order

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fix: mach port leak, FPU pointer truncation, opcode, stream count

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fix: zero descriptor size when write_data fails for stacks and memory

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fix: skip __PAGEZERO in macOS module size, guard fallback stack write

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refactor: remove artificial idle threshold from batcher timer

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docs: mark native backend as experimental

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fix: reject byte-swapped Mach-O in extract_macho_uuid

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Update src/sentry_batcher.c

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style: wrap long comment line in batcher to satisfy clang-format

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Commits

Commits on Mar 5, 2026