Address sanitizer problem with mbsrtowcs

[EvenOAndersen]

Version of emscripten/emsdk:
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 5.0.3 (285c424)
clang version 23.0.0git (https:/github.com/llvm/llvm-project e5927fecf8a6ce89e1a4eac5b828e7d42676452a)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /usr/local/emsdk/upstream/bin

Failing command line in full:
emrun index.html
->

==42==T0: FakeStack created: 0x13030000 -- 0x130e1800 stack_size_log: 16; mmapped 710K, noreserve=0 [index.html:170:19](http://localhost:6931/index.html)
==42==T0: stack [0x1294d770,0x1295d770) size 0x10000; local=0x1295d74c [index.html:170:19](http://localhost:6931/index.html)
==42==LeakSanitizer: Dynamic linker not found. TLS and other allocations originating from linker might be falsely reported as leaks. [index.html:170:19](http://localhost:6931/index.html)
==42==AddressSanitizer Init done [index.html:170:19](http://localhost:6931/index.html)
================================================================= [index.html:170:19](http://localhost:6931/index.html)
==42==ERROR: AddressSanitizer: global-buffer-overflow on address 0x12494024 at pc 0x00007ab4 bp 0x1295d730 sp 0x1295d73c [index.html:170:19](http://localhost:6931/index.html)
READ of size 4 at 0x12494024 thread T0 [index.html:170:19](http://localhost:6931/index.html)
    #0 0x00007ab4  (this.program+0x7ab4) [index.html:170:19](http://localhost:6931/index.html)
    #1 0x0000184c  (this.program+0x184c) [index.html:170:19](http://localhost:6931/index.html)
    #2 0x00006611  (this.program+0x6611) [index.html:170:19](http://localhost:6931/index.html)
    #3 0x80000227 in createExportWrapper/< http://localhost:6931/index.js:551:12 [index.html:170:19](http://localhost:6931/index.html)
    #4 0x800012f8 in callMain http://localhost:6931/index.js:4856:28 [index.html:170:19](http://localhost:6931/index.html)
    #5 0x80001322 in doRun http://localhost:6931/index.js:4898:24 [index.html:170:19](http://localhost:6931/index.html)
    #6 0x80001329 in run/< http://localhost:6931/index.js:4905:7 [index.html:170:19](http://localhost:6931/index.html)
<empty string> [index.html:170:19](http://localhost:6931/index.html)
0x12494024 is located 60 bytes before global variable '.str.3' defined in 'main.cpp' (0x12494060) of size 2 [index.html:170:19](http://localhost:6931/index.html)
  '.str.3' is ascii string ' [index.html:170:19](http://localhost:6931/index.html)
' [index.html:170:19](http://localhost:6931/index.html)
0x12494024 is located 28 bytes before global variable '.str.2' defined in 'main.cpp' (0x12494040) of size 9 [index.html:170:19](http://localhost:6931/index.html)
  '.str.2' is ascii string ' Input: ' [index.html:170:19](http://localhost:6931/index.html)
0x12494025 is located 0 bytes after global variable '.str.1' defined in 'main.cpp' (0x12494020) of size 5 [index.html:170:19](http://localhost:6931/index.html)
  '.str.1' is ascii string 'url3' [index.html:170:19](http://localhost:6931/index.html)
SUMMARY: AddressSanitizer: global-buffer-overflow (this.program+0x7ab0) [index.html:170:19](http://localhost:6931/index.html)
Shadow bytes around the buggy address: [index.html:170:19](http://localhost:6931/index.html)
  0x12493d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [index.html:170:19](http://localhost:6931/index.html)
  0x12493e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [index.html:170:19](http://localhost:6931/index.html)
  0x12493e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [index.html:170:19](http://localhost:6931/index.html)
  0x12493f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [index.html:170:19](http://localhost:6931/index.html)
  0x12493f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 [index.html:170:19](http://localhost:6931/index.html)
=>0x12494000: 00 04 f9 f9[05]f9 f9 f9 00 01 f9 f9 02 f9 f9 f9 [index.html:170:19](http://localhost:6931/index.html)
  0x12494080: 04 f9 f9 f9 05 f9 f9 f9 04 f9 f9 f9 04 f9 f9 f9 [index.html:170:19](http://localhost:6931/index.html)
  0x12494100: 04 f9 f9 f9 04 f9 f9 f9 04 f9 f9 f9 00 00 00 00 [index.html:170:19](http://localhost:6931/index.html)
  0x12494180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [index.html:170:19](http://localhost:6931/index.html)
  0x12494200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [index.html:170:19](http://localhost:6931/index.html)
  0x12494280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [index.html:170:19](http://localhost:6931/index.html)
Shadow byte legend (one shadow byte represents 8 application bytes): [index.html:170:19](http://localhost:6931/index.html)
  Addressable:           00 [index.html:170:19](http://localhost:6931/index.html)
  Partially addressable: 01 02 03 04 05 06 07 [index.html:170:19](http://localhost:6931/index.html)
  Heap left redzone:       fa [index.html:170:19](http://localhost:6931/index.html)
  Freed heap region:       fd [index.html:170:19](http://localhost:6931/index.html)
  Stack left redzone:      f1 [index.html:170:19](http://localhost:6931/index.html)
  Stack mid redzone:       f2 [index.html:170:19](http://localhost:6931/index.html)
  Stack right redzone:     f3 [index.html:170:19](http://localhost:6931/index.html)
  Stack after return:      f5 [index.html:170:19](http://localhost:6931/index.html)
  Stack use after scope:   f8 [index.html:170:19](http://localhost:6931/index.html)
  Global redzone:          f9 [index.html:170:19](http://localhost:6931/index.html)
  Global init order:       f6 [index.html:170:19](http://localhost:6931/index.html)
  Poisoned by user:        f7 [index.html:170:19](http://localhost:6931/index.html)
  Container overflow:      fc [index.html:170:19](http://localhost:6931/index.html)
  Array cookie:            ac [index.html:170:19](http://localhost:6931/index.html)
  Intra object redzone:    bb [index.html:170:19](http://localhost:6931/index.html)
  ASan internal:           fe [index.html:170:19](http://localhost:6931/index.html)
  Left alloca redzone:     ca [index.html:170:19](http://localhost:6931/index.html)
  Right alloca redzone:    cb [index.html:170:19](http://localhost:6931/index.html)
==42==ABORTING [index.html:170:19](http://localhost:6931/index.html)

​

Full link command and output with -v appended:
emcc main.cpp -o index.html -fsanitize=address --pre-js asan.js -v
->

/usr/local/emsdk/upstream/bin/clang -target wasm32-unknown-emscripten -fignore-exceptions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=/usr/local/emsdk/upstream/emscripten/cache/sysroot -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -fsanitize=address -v -c main.cpp -o /tmp/emscripten_temp_fsvux8tx/main.o
clang version 23.0.0git (https:/github.com/llvm/llvm-project e5927fecf8a6ce89e1a4eac5b828e7d42676452a)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /usr/local/emsdk/upstream/bin
 (in-process)
 "/usr/local/emsdk/upstream/bin/clang-23" -cc1 -triple wasm32-unknown-emscripten -emit-obj -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.cpp -mrelocation-model static -mframe-pointer=none -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu generic -fvisibility=hidden -debugger-tuning=gdb -fdebug-compilation-dir=/media/evenan/LaCie/lnx/source/repos/QTBUG/mbstate-bug -v -fcoverage-compilation-dir=/media/evenan/LaCie/lnx/source/repos/QTBUG/mbstate-bug -resource-dir /usr/local/emsdk/upstream/lib/clang/23 -D EMSCRIPTEN -isysroot /usr/local/emsdk/upstream/emscripten/cache/sysroot -internal-isystem /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/noeh/c++/v1 -internal-isystem /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/c++/v1 -internal-isystem /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1 -internal-isystem /usr/local/emsdk/upstream/lib/clang/23/include -internal-isystem /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten -internal-isystem /usr/local/emsdk/upstream/emscripten/cache/sysroot/include -fdeprecated-macro -ferror-limit 19 -fmessage-length=218 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fignore-exceptions -fexceptions -fcolor-diagnostics -iwithsysroot/include/fakesdl -iwithsysroot/include/compat -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -fsanitize=address -fno-sanitize-memory-param-retval -fsanitize-address-use-after-scope -fsanitize-address-globals-dead-stripping -fno-assume-sane-operator-new -o /tmp/emscripten_temp_fsvux8tx/main.o -x c++ main.cpp
clang -cc1 version 23.0.0git based upon LLVM 23.0.0git default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/noeh/c++/v1"
ignoring nonexistent directory "/usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/c++/v1"
ignoring nonexistent directory "/usr/local/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/fakesdl
 /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/compat
 /usr/local/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1
 /usr/local/emsdk/upstream/lib/clang/23/include
 /usr/local/emsdk/upstream/emscripten/cache/sysroot/include
End of search list.
 /usr/local/emsdk/upstream/bin/clang --version
 /usr/local/emsdk/upstream/bin/wasm-ld -o index.wasm /tmp/tmpuz8gdsnalibemscripten_js_symbols.so --strip-debug --export=emscripten_stack_get_end --export=emscripten_stack_get_free --export=emscripten_stack_get_base --export=emscripten_stack_get_current --export=emscripten_stack_init --export=_emscripten_stack_alloc --export=__lsan_disable --export=__lsan_enable --export=__asan_loadN --export=__asan_storeN --export=__funcs_on_exit --export=__wasm_call_ctors --export=_emscripten_stack_restore --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm --export-if-defined=__start_em_lib_deps --export-if-defined=__stop_em_lib_deps --export-if-defined=__start_em_js --export-if-defined=__stop_em_js --export-if-defined=main --export-if-defined=__main_argc_argv --export-if-defined=fflush --export-table -z stack-size=65536 --no-growable-memory --initial-heap=69206016 --no-entry --no-stack-first --table-base=1 --global-base=306790400 /tmp/emscripten_temp_fsvux8tx/main.o -L/usr/local/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten -L/usr/local/emsdk/upstream/emscripten/src/lib -lGL-getprocaddr -lal -lhtml5 -lstubs-debug -lc-asan-debug -ldlmalloc-debug -lcompiler_rt -lc++-debug-noexcept -lc++abi-debug-noexcept -lsockets --whole-archive -lasan_rt --no-whole-archive -lubsan_rt -llsan_common_rt -lsanitizer_common_rt -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr
 /usr/local/emsdk/upstream/bin/llvm-objcopy index.wasm index.wasm '--remove-section=llvm.func_attr.annotate.*' --remove-section=producers --remove-section=name '--remove-section=.debug*'
 /usr/local/emsdk/node/22.16.0_64bit/bin/node /usr/local/emsdk/upstream/emscripten/tools/compiler.mjs -
 /usr/local/emsdk/node/22.16.0_64bit/bin/node /usr/local/emsdk/upstream/emscripten/tools/acorn-optimizer.mjs /tmp/emscripten_temp_fsvux8tx/index.js asanify --closure-friendly -o /tmp/emscripten_temp_fsvux8tx/index.jso1.js
 /usr/local/emsdk/node/22.16.0_64bit/bin/node /usr/local/emsdk/upstream/emscripten/tools/preprocessor.mjs - shell.html

main.cpp

asan.js

[gotti19868686-cloud]

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