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trace: Split guest_mem_before

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There is no point in encoding load/store within a bit of
the memory trace info operand.  Represent atomic operations
as a single read-modify-write tracepoint.  Use MemOpIdx
instead of inventing a form specifically for traces.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-07-26 13:21:38 -10:00
parent 37aff08726
commit 0583f775d2
7 changed files with 28 additions and 122 deletions
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18
trace-events
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@ -120,26 +120,16 @@ vcpu guest_cpu_reset(void)
# tcg/tcg-op.c
# @vaddr: Access' virtual address.
# @info : Access' information (see below).
# @memopidx: Access' information (see below).
#
# Start virtual memory access (before any potential access violation).
#
# Does not include memory accesses performed by devices.
#
# Access information can be parsed as:
#
# struct mem_info {
# uint8_t size_shift : 4; /* interpreted as "1 << size_shift" bytes */
# bool sign_extend: 1; /* sign-extended */
# uint8_t endianness : 1; /* 0: little, 1: big */
# bool store : 1; /* whether it is a store operation */
# pad : 1;
# uint8_t mmuidx : 4; /* mmuidx (softmmu only) */
# };
#
# Mode: user, softmmu
# Targets: TCG(all)
vcpu tcg guest_mem_before(TCGv vaddr, uint16_t info) "info=%d", "vaddr=0x%016"PRIx64" info=%d"
vcpu tcg guest_ld_before(TCGv vaddr, uint32_t memopidx) "info=%d", "vaddr=0x%016"PRIx64" memopidx=0x%x"
vcpu tcg guest_st_before(TCGv vaddr, uint32_t memopidx) "info=%d", "vaddr=0x%016"PRIx64" memopidx=0x%x"
vcpu tcg guest_rmw_before(TCGv vaddr, uint32_t memopidx) "info=%d", "vaddr=0x%016"PRIx64" memopidx=0x%x"
# include/user/syscall-trace.h