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move inLocalLabel / outLocalLabel calls inside exception handler or else they will subsequently error if the buffer overflows, aftet the exception is handled

This commit is contained in:
Anthony Pesch 2017-08-20 21:35:16 -04:00
parent c066204038
commit f6827af92c
1 changed files with 4 additions and 4 deletions
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8
src/jit/backend/x64/x64_backend.cc
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@ -568,6 +568,8 @@ static void x64_backend_emit(struct x64_backend *backend, struct ir *ir,
CHECK_LT(ir->locals_size, X64_STACK_SIZE);
e.inLocalLabel();
list_for_each_entry(block, &ir->blocks, struct ir_block, it) {
int first = 1;
uint8_t *block_addr = e.getCurr<uint8_t *>();
@ -602,6 +604,8 @@ static void x64_backend_emit(struct x64_backend *backend, struct ir *ir,
x64_backend_emit_epilog(backend, block);
}
e.outLocalLabel();
}
static int x64_backend_assemble_code(struct jit_backend *base, struct ir *ir,
@ -617,8 +621,6 @@ static int x64_backend_assemble_code(struct jit_backend *base, struct ir *ir,
/* try to generate the x64 code. if the code buffer overflows let the backend
know so it can reset the cache and try again */
e.inLocalLabel();
try {
x64_backend_emit(backend, ir, emit_cb, emit_data);
} catch (const Xbyak::Error &e) {
@ -628,8 +630,6 @@ static int x64_backend_assemble_code(struct jit_backend *base, struct ir *ir,
res = 0;
}
e.outLocalLabel();
/* return code address */
*addr = code;
*size = (int)(e.getCurr<uint8_t *>() - code);