msys2
[gcc] -freport-bug doesn't work on ICEs
As pointed out in #20864 passing -freport-bug to GCC when it triggers an ICE leads to another error:
Please submit a full bug report, with preprocessed source.
See <https://github.com/msys2/MINGW-packages/issues> for instructions.
gcc: fatal error: cannot execute 'C:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/cc1.exe': open temporary output file: No such file or directory
I don't know what it's supposed to do and if that is worth looking into, since I don't know how to make it do anything without knowing a way to crash gcc.
I did a quick grep of the gcc sources for "open temporary output file" and found the likely reason for this.
In gcc/gcc.cc do_report_bug() calls run_attempt(append=1), this append flag gets through pex_run/pex_run_in_environment in libiberty/pex-common.c, which ends in a call of pex_win32_open_write(append=1) in libiberty/pex-win32.c.
The function looks like this:
static int
pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
int binary, int append)
{
/* Note that we can't use O_EXCL here because gcc may have already
created the temporary file via make_temp_file. */
if (append)
return -1;
return _open (name,
(_O_WRONLY | _O_CREAT | _O_TRUNC
| (binary ? _O_BINARY : _O_TEXT)),
_S_IREAD | _S_IWRITE);
}
So it immediately returns -1, which results in this error in pex_run_in_environment():
out = obj->funcs->open_write (obj, outname,
(flags & PEX_BINARY_OUTPUT) != 0,
(flags & PEX_STDOUT_APPEND) != 0);
if (out < 0)
{
*err = errno;
errmsg = "open temporary output file";
goto error_exit;
}
No clue how to solve this.
This fixes -freport-bug for me:
diff --git a/gcc/gcc.cc b/gcc/gcc.cc
index 728332b8153..78505086ee3 100644
--- a/gcc/gcc.cc
+++ b/gcc/gcc.cc
@@ -7720,8 +7720,8 @@ files_equal_p (char *file1, char *file2)
const int bufsize = 8192;
char *buf = XNEWVEC (char, bufsize);
- fd1 = open (file1, O_RDONLY);
- fd2 = open (file2, O_RDONLY);
+ fd1 = open (file1, O_RDONLY | O_BINARY);
+ fd2 = open (file2, O_RDONLY | O_BINARY);
if (fd1 < 0 || fd2 < 0)
goto error;
diff --git a/libiberty/pex-win32.c b/libiberty/pex-win32.c
index 3780f1de02d..56478df47e3 100644
--- a/libiberty/pex-win32.c
+++ b/libiberty/pex-win32.c
@@ -130,10 +130,9 @@ pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name,
{
/* Note that we can't use O_EXCL here because gcc may have already
created the temporary file via make_temp_file. */
- if (append)
- return -1;
return _open (name,
- (_O_WRONLY | _O_CREAT | _O_TRUNC
+ (_O_WRONLY | _O_CREAT
+ | (append ? _O_APPEND : _O_TRUNC)
| (binary ? _O_BINARY : _O_TEXT)),
_S_IREAD | _S_IWRITE);
}
what to do:
[1/6] Building CXX object CMakeFiles/KickC.dir/src/main/kickc/parse/CParser.ixx.obj FAILED: CMakeFiles/KickC.dir/src/main/kickc/parse/CParser.ixx.obj CMakeFiles/KickC.dir/CParser.gcm C:\msys64\ucrt64\bin\g++.exe -DANTLR4CPP_STATIC -IC:/Users/svenv/CLionProjects/KickC/cmake-build-debug-mingw-msys2/antlr4_runtime/src/antlr4_runtime/runtime/Cpp/runtime/src -IC:/Users/svenv/CLionProjects/KickC -IC:/Users/svenv/CLionProjects/KickC/libs -IC:/Users/svenv/CLionProjects/KickC/src/main/include -IC:/Users/svenv/CLionProjects/KickC/src/main/kickc -IC:/Users/svenv/CLionProjects/KickC/src/main/modules -IC:/Users/svenv/CLionProjects/KickC/cmake-build-debug-mingw-msys2/antlr4cpp_generated_src/KickCLexer -IC:/Users/svenv/CLionProjects/KickC/cmake-build-debug-mingw-msys2/antlr4cpp_generated_src/KickCParser -Mmodules -freport-bug -g -std=gnu++23 -fdiagnostics-color=always -MD -MT CMakeFiles/KickC.dir/src/main/kickc/parse/CParser.ixx.obj -MF CMakeFiles\KickC.dir\src\main\kickc\parse\CParser.ixx.obj.d -fmodules-ts -fmodule-mapper=CMakeFiles\KickC.dir\src\main\kickc\parse\CParser.ixx.obj.modmap -MD -fdeps-format=p1689r5 -x c++ -o CMakeFiles/KickC.dir/src/main/kickc/parse/CParser.ixx.obj -c C:/Users/svenv/CLionProjects/KickC/src/main/kickc/parse/CParser.ixx In module imported at C:/Users/svenv/CLionProjects/KickC/src/main/kickc/cpu/Cpu65xx.ixx:14:1, of module Cpu65xx, imported at C:/Users/svenv/CLionProjects/KickC/src/main/kickc/cpu/CpuHuc6280.h:10, included from C:/Users/svenv/CLionProjects/KickC/src/main/kickc/model/TargetCpu.h:21, from C:/Users/svenv/CLionProjects/KickC/src/main/kickc/model/TargetPlatform.h:13, from C:/Users/svenv/CLionProjects/KickC/src/main/kickc/model/Program.h:12, from C:/Users/svenv/CLionProjects/KickC/src/main/kickc/parse/CParser.ixx:13: CpuAddressingMode: note: unable to represent further imported source locations C:/Users/svenv/CLionProjects/KickC/src/main/kickc/parse/CParser.ixx:21:9: internal compiler error: in write_location, at cp/module.cc:16271 21 | export module CParser; | ^ Please submit a full bug report, with preprocessed source. See https://github.com/msys2/MINGW-packages/issues for instructions. g++.exe: fatal error: cannot execute 'C:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/cc1plus.exe': open temporary output file: No such file or directory compilation terminated. ninja: build stopped: subcommand failed.
