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3f6647f3ae
setjmp is not guaranteed to collect all registers without modification on all platforms. This fixes the following bug: when the pointer of a newly allocated object on the Python heap is stored in rpb registers on x86_64 arch, it was not collected by the garbarge collector.
25 lines
660 B
C
25 lines
660 B
C
#ifndef LIBA_SETJMP_H
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#define LIBA_SETJMP_H
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#include <stdint.h>
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#include "private/macros.h"
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/* We are preseving registers:
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* - sp & lr -> 2x4 bytes
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* - General purpose registers: r4-r9, r10 = sl, r11 = fp -> 8x4 bytes
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* - Floating point registers: s16-s31 -> 8x8 bytes
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* - VFP status register: fpscr ->1x4 bytes
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* The buffer size has to include room for setjmp implementation: 4x4 bytes.
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* (See C Library ABI for the ARM architecture documentation)
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* The minimum buffer size is then (2+8+16+1+4)xsizeof(int64_t). */
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LIBA_BEGIN_DECLS
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typedef uintptr_t jmp_buf[31];
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void longjmp(jmp_buf env, int val);
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int setjmp(jmp_buf env);
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LIBA_END_DECLS
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#endif
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