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exec: [tcg] Track which vCPU is performing translation and execution

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Information is tracked inside the TCGContext structure, and later used
by tracing events with the 'tcg' and 'vcpu' properties.

The 'cpu' field is used to check tracing of translation-time
events ("*_trans"). The 'tcg_env' field is used to pass it to
execution-time events ("*_exec").

Backports commit 7c2550432abe62f53e6df878ceba6ceaf71f0e7e from qemu
This commit is contained in:
Lluís Vilanova 2018-02-24 19:17:36 -05:00 committed by Lioncash
parent 0f6513ef62
commit 2297527755
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
7 changed files with 13 additions and 0 deletions
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1
qemu/target-arm/translate.c
View file

@ -73,6 +73,7 @@ void arm_translate_init(struct uc_struct *uc)
TCGContext *tcg_ctx = uc->tcg_ctx;
tcg_ctx->cpu_env = tcg_global_reg_new_ptr(uc->tcg_ctx, TCG_AREG0, "env");
tcg_ctx->tcg_env = tcg_ctx->cpu_env;
for (i = 0; i < 16; i++) {
tcg_ctx->cpu_R[i] = tcg_global_mem_new_i32(uc->tcg_ctx, tcg_ctx->cpu_env,

2
qemu/target-i386/translate.c
View file

@ -8909,6 +8909,8 @@ void tcg_x86_init(struct uc_struct *uc)
TCGContext *tcg_ctx = uc->tcg_ctx;
tcg_ctx->cpu_env = tcg_global_reg_new_ptr(uc->tcg_ctx, TCG_AREG0, "env");
tcg_ctx->tcg_env = tcg_ctx->cpu_env;
tcg_ctx->cpu_cc_op = tcg_global_mem_new_i32(uc->tcg_ctx, tcg_ctx->cpu_env,
offsetof(CPUX86State, cc_op), "cc_op");

1
qemu/target-m68k/translate.c
View file

@ -52,6 +52,7 @@ void m68k_tcg_init(struct uc_struct *uc)
int i;
tcg_ctx->cpu_env = tcg_global_reg_new_ptr(tcg_ctx, TCG_AREG0, "env");
tcg_ctx->tcg_env = tcg_ctx->cpu_env;
#define DEFO32(name, offset) tcg_ctx->QREG_##name = tcg_global_mem_new_i32(tcg_ctx, tcg_ctx->cpu_env, offsetof(CPUM68KState, offset), #name);
#define DEFO64(name, offset) tcg_ctx->QREG_##name = tcg_global_mem_new_i64(tcg_ctx, tcg_ctx->cpu_env, offsetof(CPUM68KState, offset), #name);

1
qemu/target-mips/translate.c
View file

@ -20144,6 +20144,7 @@ void mips_tcg_init(struct uc_struct *uc)
int i;
tcg_ctx->cpu_env = tcg_global_reg_new_ptr(uc->tcg_ctx, TCG_AREG0, "env");
tcg_ctx->tcg_env = tcg_ctx->cpu_env;
for (i = 0; i < 32; i++) {
tcg_ctx->cpu_gpr[i] = tcg_global_mem_new(tcg_ctx, tcg_ctx->cpu_env,

2
qemu/target-sparc/translate.c
View file

@ -5537,6 +5537,8 @@ void gen_intermediate_code_init(CPUSPARCState *env)
return;
}
tcg_ctx->cpu_env = tcg_global_reg_new_ptr(tcg_ctx, TCG_AREG0, "env");
tcg_ctx->tcg_env = tcg_ctx->cpu_env;
tcg_ctx->cpu_regwptr = tcg_global_mem_new_ptr(tcg_ctx, tcg_ctx->cpu_env,
offsetof(CPUSPARCState, regwptr),
"regwptr");

4
qemu/tcg/tcg.h
View file

@ -727,6 +727,10 @@ struct TCGContext {
TBContext tb_ctx;
/* Track which vCPU triggers events */
CPUState *cpu; /* *_trans */
TCGv_env tcg_env; /* *_exec */
/* The TCGBackendData structure is private to tcg-target.inc.c. */
struct TCGBackendData *be;

2
qemu/translate-all.c
View file

@ -1292,7 +1292,9 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tcg_func_start(tcg_ctx);
tcg_ctx->cpu = ENV_GET_CPU(env);
gen_intermediate_code(env, tb);
tcg_ctx->cpu = NULL;
// Unicorn: when tracing block, patch block size operand for callback
if (env->uc->size_arg != -1 && HOOK_EXISTS_BOUNDED(env->uc, UC_HOOK_BLOCK, tb->pc)) {