Hello,
I have pushed a small Windows-focused patch series. The goal is
to improve a few robustness issues without changing default x86/x64 output
behavior.
The series contains four independent changes:
1. win32: make compile lock initialization thread-safe
libtcc serializes compilation because parser/codegen state is still
global. On Windows the CRITICAL_SECTION used for this lock was lazily
initialized without synchronization, so two first-time callers could race.
The patch uses interlocked state transitions around
InitializeCriticalSection.
2. win32: run cv2pdb without shell quoting issues
-g.pdb used system("cv2pdb.exe ...") with a fixed-size command buffer.
That breaks for output paths containing spaces and unnecessarily goes
through the shell. The patch uses _spawnvp on Windows, keeps a quoted
fallback for non-Windows PE cross builds, and allocates the PDB path
based on the actual output name.
3. pe: add dll characteristic linker options
This adds PE linker options for dynamicbase, nxcompat, high-entropy-va,
and tsaware, plus no-/disable- forms. high-entropy-va is available for
x86_64 and ARM64 PE targets and implies dynamicbase. Disabling
dynamicbase also clears high-entropy-va. When dynamicbase is enabled for
an executable, TCC enables base relocation emission and clears the
RELOCS_STRIPPED file characteristic. ARM64 keeps its existing default
hardening flags. x86/x64 defaults are not changed.
4. win32: improve tccrun protection diagnostics
The -run memory protection path now reports VirtualProtect failures on
Windows instead of the Unix mprotect message. On x64 it also checks
RtlAddFunctionTable so unwind registration failures are not silent.
I tested the series on Windows x86_64 with:
./configure --cc=gcc
make -j2
make test
The full test target passed. I also checked generated PE headers with
objdump for the default case, dynamicbase/nxcompat, high-entropy-va,
no-dynamicbase, and the high-entropy-va/no-dynamicbase ordering cases, and
verified the produced executables run. For the inverse path, I verified that
no-dynamicbase executables keep RELOCS_STRIPPED set and don't get a .reloc
section.
Regards,
Mounir IDRASSI
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