mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-05 11:37:46 +00:00
Jake Bailey
16fc1ea2bb
Match the Go runtime by terminating for deadlocks, stack overflows, runtime and GC invariants, invalid lock operations, and platform initialization failures instead of routing them through panic/recover. Keep language-level runtime errors and unsupported user operations recoverable. Add crash coverage that verifies fatal errors bypass deferred recover calls.
64 lines
2.1 KiB
Go
64 lines
2.1 KiB
Go
package runtime
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import "unsafe"
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const GOOS = "windows"
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const zeroSizeAllocPtr uintptr = 16 // part of the first protected page
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//export GetModuleHandleExA
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func _GetModuleHandleExA(dwFlags uint32, lpModuleName unsafe.Pointer, phModule **exeHeader) bool
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// Mark global variables.
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// Unfortunately, the linker doesn't provide symbols for the start and end of
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// the data/bss sections. Therefore these addresses need to be determined at
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// runtime. This might seem complex and it kind of is, but it only compiles to
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// around 160 bytes of amd64 instructions.
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// Most of this function is based on the documentation in
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// https://docs.microsoft.com/en-us/windows/win32/debug/pe-format.
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func findGlobals(found func(start, end uintptr)) {
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// Constants used in this function.
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const (
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// https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulehandleexa
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GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT = 0x00000002
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)
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if module == nil {
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// Obtain a handle to the currently executing image. What we're getting
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// here is really just __ImageBase, but it's probably better to obtain
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// it using GetModuleHandle to account for ASLR etc.
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result := _GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, nil, &module)
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if gcAsserts && (!result || module.signature != 0x5A4D) { // 0x4D5A is "MZ"
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runtimeFatal("cannot get module handle")
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}
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}
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findGlobalsForPE(found)
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}
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type systeminfo struct {
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anon0 [4]byte
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dwpagesize uint32
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lpminimumapplicationaddress *byte
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lpmaximumapplicationaddress *byte
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dwactiveprocessormask uintptr
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dwnumberofprocessors uint32
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dwprocessortype uint32
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dwallocationgranularity uint32
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wprocessorlevel uint16
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wprocessorrevision uint16
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}
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//export GetSystemInfo
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func _GetSystemInfo(lpSystemInfo unsafe.Pointer)
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//go:linkname syscall_Getpagesize syscall.Getpagesize
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func syscall_Getpagesize() int {
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var info systeminfo
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_GetSystemInfo(unsafe.Pointer(&info))
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return int(info.dwpagesize)
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}
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//export _errno
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func libc_errno_location() *int32
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