lazymio/unicorn
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

no more spinlock

Browse Source
This commit is contained in:
Nguyen Anh Quynh
2017-01-20 14:57:33 +08:00
parent a7fca49f7a
commit 42771848d6
19 changed files with 0 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
qemu/cpu-exec.c
View File

@@ -67,9 +67,6 @@ int cpu_exec(struct uc_struct *uc, CPUArchState *env) // qq
struct hook *hook;
/* This must be volatile so it is not trashed by longjmp() */
volatile bool have_tb_lock = false;
if (cpu->halted) {
if (!cpu_has_work(cpu)) {
return EXCP_HALTED;
@@ -208,8 +205,6 @@ int cpu_exec(struct uc_struct *uc, CPUArchState *env) // qq
cpu->exception_index = EXCP_INTERRUPT;
cpu_loop_exit(cpu);
}
spin_lock(&tcg_ctx->tb_ctx.tb_lock);
have_tb_lock = true;
tb = tb_find_fast(env); // qq
if (!tb) { // invalid TB due to invalid code?
uc->invalid_error = UC_ERR_FETCH_UNMAPPED;
@@ -232,8 +227,6 @@ int cpu_exec(struct uc_struct *uc, CPUArchState *env) // qq
tb_add_jump((TranslationBlock *)(next_tb & ~TB_EXIT_MASK),
next_tb & TB_EXIT_MASK, tb);
}
have_tb_lock = false;
spin_unlock(&tcg_ctx->tb_ctx.tb_lock);
/* cpu_interrupt might be called while translating the
TB, but before it is linked into a potentially
@@ -275,10 +268,6 @@ int cpu_exec(struct uc_struct *uc, CPUArchState *env) // qq
#ifdef TARGET_I386
x86_cpu = X86_CPU(uc, cpu);
#endif
if (have_tb_lock) {
spin_unlock(&tcg_ctx->tb_ctx.tb_lock);
have_tb_lock = false;
}
}
} /* for(;;) */