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feat(rtl): make exception globals thread-local

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Change g_exc_top and g_current_exception from var to threadvar in
blaise_exc.pas, giving each thread its own exception chain. This is
required for safe multi-threaded exception handling.
This commit is contained in:
Graeme Geldenhuys 2026-06-06 12:06:05 +01:00
parent 3bf220c7f4
commit 34a1c4feab
1 changed files with 3 additions and 4 deletions
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7
runtime/src/main/pascal/blaise_exc.pas
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@ -23,9 +23,8 @@
all supported targets. The generous allocation leaves room for future
ARM64 jmp_buf growth without a compiler change.
Thread safety: g_exc_top and g_current_exception are plain globals.
When threadvar support is added to the language, they should become
thread-local.
Thread safety: g_exc_top and g_current_exception are declared as
threadvar, giving each thread its own exception chain.
}
unit blaise_exc;
@ -59,7 +58,7 @@ function _BlaiseGetMem(Size: Integer): Pointer; external name '_BlaiseGetMem';
function _libc_write(Fd: Integer; Buf: Pointer; Count: Int64): Int64; external name 'write';
procedure _libc_abort; external name 'abort';
var
threadvar
g_exc_top: Pointer;
g_current_exception: Pointer;