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Add a sanitizer to check if there is a definition of vreg before its (#1224)

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liang.he 2022-06-14 10:44:43 +08:00 committed by GitHub
parent 0ab070af96
commit 96fa546cc9
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1 changed files with 31 additions and 0 deletions
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31
core/iwasm/fast-jit/jit_regalloc.c
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@ -6,6 +6,10 @@
#include "jit_utils.h"
#include "jit_compiler.h"
#if BH_DEBUG != 0
#define VREG_DEF_SANITIZER
#endif
/**
* A uint16 stack for storing distances of occurrences of virtual
* registers.
@ -350,6 +354,29 @@ is_alloc_candidate(JitCompContext *cc, JitReg reg)
&& (!jit_cc_is_hreg(cc, reg) || !jit_cc_is_hreg_fixed(cc, reg)));
}
#ifdef VREG_DEF_SANITIZER
static void
check_vreg_definition(RegallocContext *rc, JitInsn *insn)
{
unsigned j;
JitRegVec regvec = jit_insn_opnd_regs(insn);
unsigned first_use = jit_insn_opnd_first_use(insn);
JitReg *regp;
/* check if there is the definition of an vr before its references */
JIT_REG_VEC_FOREACH_USE(regvec, j, regp, first_use)
{
VirtualReg *vr = NULL;
if (!is_alloc_candidate(rc->cc, *regp))
continue;
vr = rc_get_vr(rc, *regp);
bh_assert(vr->distances);
}
}
#endif
/**
* Collect distances from the beginning of basic block of all occurrences of
* each virtual register.
@ -371,6 +398,10 @@ collect_distances(RegallocContext *rc, JitBasicBlock *basic_block)
unsigned i;
JitReg *regp;
#ifdef VREG_DEF_SANITIZER
check_vreg_definition(rc, insn);
#endif
/* NOTE: the distance may be pushed more than once if the
virtual register occurs multiple times in the
instruction. */