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Overhaul Windows signal handling

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The new asynchronous signal delivery technique is now also being used
for tkill(), raise(), etc. Many subtle issues have been addresesd. We
now signal handling on Windows that's remarkably similar to the POSIX
behaviors. However that's just across threads. We're lacking a way to
have the signal semantics work well, across multiple WIN32 processes.
This commit is contained in:
Justine Tunney 2023-09-08 01:49:41 -07:00
parent 8bdaddd81d
commit 99dc1281f5
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GPG key ID: BE714B4575D6E328
38 changed files with 635 additions and 279 deletions
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18
libc/nt/kernel32/SetThreadContext.S Normal file
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@ -0,0 +1,18 @@
#include "libc/nt/codegen.h"
.imp kernel32,__imp_SetThreadContext,SetThreadContext
.text.windows
.ftrace1
SetThreadContext:
.ftrace2
#ifdef __x86_64__
push %rbp
mov %rsp,%rbp
mov __imp_SetThreadContext(%rip),%rax
jmp __sysv2nt
#elif defined(__aarch64__)
mov x0,#0
ret
#endif
.endfn SetThreadContext,globl
.previous

1
libc/nt/master.sh
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@ -260,6 +260,7 @@ imp 'SetProcessWorkingSetSize' SetProcessWorkingSetSize kernel32 3
imp 'SetProcessWorkingSetSizeEx' SetProcessWorkingSetSizeEx kernel32 4
imp 'SetStdHandle' SetStdHandle kernel32 2
imp 'SetThreadAffinityMask' SetThreadAffinityMask kernel32 2
imp 'SetThreadContext' SetThreadContext kernel32 2
imp 'SetThreadPriority' SetThreadPriority kernel32 2
imp 'SetThreadPriorityBoost' SetThreadPriorityBoost kernel32 2
imp 'SetUnhandledExceptionFilter' SetUnhandledExceptionFilter kernel32 1

2
libc/nt/struct/context.h
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@ -53,7 +53,7 @@ struct NtContext {
uint64_t LastBranchFromRip;
uint64_t LastExceptionToRip;
uint64_t LastExceptionFromRip;
};
} forcealign(16);
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_NT_STRUCT_CONTEXT_H_ */

1
libc/nt/thread.h
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@ -64,6 +64,7 @@ void *TlsGetValue(uint32_t);
uint32_t SuspendThread(int64_t hThread);
uint32_t ResumeThread(int64_t hThread);
bool32 GetThreadContext(int64_t hThread, struct NtContext *in_out_lpContext);
bool32 SetThreadContext(int64_t hThread, const struct NtContext *lpContext);
#if ShouldUseMsabiAttribute()
#include "libc/nt/thunk/thread.inc"