#pragma once
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// Default constraint for the probe arguments as operands.
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#ifndef CAFFE_SDT_ARG_CONSTRAINT
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#define CAFFE_SDT_ARG_CONSTRAINT "nor"
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#endif
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// Instruction to emit for the probe.
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#define CAFFE_SDT_NOP nop
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// Note section properties.
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#define CAFFE_SDT_NOTE_NAME "stapsdt"
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#define CAFFE_SDT_NOTE_TYPE 3
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// Size of address depending on platform.
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#ifdef __LP64__
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#define CAFFE_SDT_ASM_ADDR .8byte
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#else
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#define CAFFE_SDT_ASM_ADDR .4byte
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#endif
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// Assembler helper Macros.
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#define CAFFE_SDT_S(x) #x
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#define CAFFE_SDT_ASM_1(x) CAFFE_SDT_S(x) "\n"
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#define CAFFE_SDT_ASM_2(a, b) CAFFE_SDT_S(a) "," CAFFE_SDT_S(b) "\n"
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#define CAFFE_SDT_ASM_3(a, b, c) CAFFE_SDT_S(a) "," CAFFE_SDT_S(b) "," \
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CAFFE_SDT_S(c) "\n"
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#define CAFFE_SDT_ASM_STRING(x) CAFFE_SDT_ASM_1(.asciz CAFFE_SDT_S(x))
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// Helper to determine the size of an argument.
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#define CAFFE_SDT_ISARRAY(x) (__builtin_classify_type(x) == 14)
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#define CAFFE_SDT_ARGSIZE(x) (CAFFE_SDT_ISARRAY(x) ? sizeof(void*) : sizeof(x))
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// Format of each probe arguments as operand.
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// Size of the arugment tagged with CAFFE_SDT_Sn, with "n" constraint.
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// Value of the argument tagged with CAFFE_SDT_An, with configured constraint.
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#define CAFFE_SDT_ARG(n, x) \
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[CAFFE_SDT_S##n] "n" ((size_t)CAFFE_SDT_ARGSIZE(x)), \
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[CAFFE_SDT_A##n] CAFFE_SDT_ARG_CONSTRAINT (x)
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// Templates to append arguments as operands.
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#define CAFFE_SDT_OPERANDS_0() [__sdt_dummy] "g" (0)
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#define CAFFE_SDT_OPERANDS_1(_1) CAFFE_SDT_ARG(1, _1)
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#define CAFFE_SDT_OPERANDS_2(_1, _2) \
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CAFFE_SDT_OPERANDS_1(_1), CAFFE_SDT_ARG(2, _2)
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#define CAFFE_SDT_OPERANDS_3(_1, _2, _3) \
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CAFFE_SDT_OPERANDS_2(_1, _2), CAFFE_SDT_ARG(3, _3)
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#define CAFFE_SDT_OPERANDS_4(_1, _2, _3, _4) \
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CAFFE_SDT_OPERANDS_3(_1, _2, _3), CAFFE_SDT_ARG(4, _4)
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#define CAFFE_SDT_OPERANDS_5(_1, _2, _3, _4, _5) \
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CAFFE_SDT_OPERANDS_4(_1, _2, _3, _4), CAFFE_SDT_ARG(5, _5)
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#define CAFFE_SDT_OPERANDS_6(_1, _2, _3, _4, _5, _6) \
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CAFFE_SDT_OPERANDS_5(_1, _2, _3, _4, _5), CAFFE_SDT_ARG(6, _6)
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#define CAFFE_SDT_OPERANDS_7(_1, _2, _3, _4, _5, _6, _7) \
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CAFFE_SDT_OPERANDS_6(_1, _2, _3, _4, _5, _6), CAFFE_SDT_ARG(7, _7)
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#define CAFFE_SDT_OPERANDS_8(_1, _2, _3, _4, _5, _6, _7, _8) \
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CAFFE_SDT_OPERANDS_7(_1, _2, _3, _4, _5, _6, _7), CAFFE_SDT_ARG(8, _8)
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// Templates to reference the arguments from operands in note section.
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#define CAFFE_SDT_ARGFMT(no) %n[CAFFE_SDT_S##no]@%[CAFFE_SDT_A##no]
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#define CAFFE_SDT_ARG_TEMPLATE_0 /*No arguments*/
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#define CAFFE_SDT_ARG_TEMPLATE_1 CAFFE_SDT_ARGFMT(1)
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#define CAFFE_SDT_ARG_TEMPLATE_2 CAFFE_SDT_ARG_TEMPLATE_1 CAFFE_SDT_ARGFMT(2)
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#define CAFFE_SDT_ARG_TEMPLATE_3 CAFFE_SDT_ARG_TEMPLATE_2 CAFFE_SDT_ARGFMT(3)
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#define CAFFE_SDT_ARG_TEMPLATE_4 CAFFE_SDT_ARG_TEMPLATE_3 CAFFE_SDT_ARGFMT(4)
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#define CAFFE_SDT_ARG_TEMPLATE_5 CAFFE_SDT_ARG_TEMPLATE_4 CAFFE_SDT_ARGFMT(5)
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#define CAFFE_SDT_ARG_TEMPLATE_6 CAFFE_SDT_ARG_TEMPLATE_5 CAFFE_SDT_ARGFMT(6)
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#define CAFFE_SDT_ARG_TEMPLATE_7 CAFFE_SDT_ARG_TEMPLATE_6 CAFFE_SDT_ARGFMT(7)
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#define CAFFE_SDT_ARG_TEMPLATE_8 CAFFE_SDT_ARG_TEMPLATE_7 CAFFE_SDT_ARGFMT(8)
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// Structure of note section for the probe.
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#define CAFFE_SDT_NOTE_CONTENT(provider, name, arg_template) \
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CAFFE_SDT_ASM_1(990: CAFFE_SDT_NOP) \
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CAFFE_SDT_ASM_3( .pushsection .note.stapsdt,"","note") \
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CAFFE_SDT_ASM_1( .balign 4) \
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CAFFE_SDT_ASM_3( .4byte 992f-991f, 994f-993f, CAFFE_SDT_NOTE_TYPE) \
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CAFFE_SDT_ASM_1(991: .asciz CAFFE_SDT_NOTE_NAME) \
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CAFFE_SDT_ASM_1(992: .balign 4) \
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CAFFE_SDT_ASM_1(993: CAFFE_SDT_ASM_ADDR 990b) \
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CAFFE_SDT_ASM_1( CAFFE_SDT_ASM_ADDR 0) /*Reserved for Semaphore address*/\
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CAFFE_SDT_ASM_1( CAFFE_SDT_ASM_ADDR 0) /*Reserved for Semaphore name*/ \
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CAFFE_SDT_ASM_STRING(provider) \
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CAFFE_SDT_ASM_STRING(name) \
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CAFFE_SDT_ASM_STRING(arg_template) \
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CAFFE_SDT_ASM_1(994: .balign 4) \
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CAFFE_SDT_ASM_1( .popsection)
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// Main probe Macro.
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#define CAFFE_SDT_PROBE(provider, name, n, arglist) \
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__asm__ __volatile__ ( \
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CAFFE_SDT_NOTE_CONTENT(provider, name, CAFFE_SDT_ARG_TEMPLATE_##n) \
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:: CAFFE_SDT_OPERANDS_##n arglist \
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) \
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// Helper Macros to handle variadic arguments.
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#define CAFFE_SDT_NARG_(_0, _1, _2, _3, _4, _5, _6, _7, _8, N, ...) N
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#define CAFFE_SDT_NARG(...) \
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CAFFE_SDT_NARG_(__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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#define CAFFE_SDT_PROBE_N(provider, name, N, ...) \
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CAFFE_SDT_PROBE(provider, name, N, (__VA_ARGS__))
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