Inside qemu_log, we perform qemu_log_trylock/unlock, which need
not be done if we have already performed the lock beforehand.
Always check the result of qemu_log_trylock -- only checking
qemu_loglevel_mask races with the acquisition of the lock on
the logfile.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
include/exec/log.h | 2 +-
accel/tcg/cpu-exec.c | 16 ++---
accel/tcg/translate-all.c | 117 +++++++++++++++++++-----------------
accel/tcg/translator.c | 10 +--
cpu.c | 14 +++--
hw/net/can/can_sja1000.c | 24 ++++----
net/can/can_socketcan.c | 23 ++++---
target/i386/tcg/translate.c | 14 +++--
tcg/tcg.c | 74 +++++++++++++----------
9 files changed, 162 insertions(+), 132 deletions(-)
diff --git a/include/exec/log.h b/include/exec/log.h
index fb595d1eb7..648f4d2263 100644
--- a/include/exec/log.h
+++ b/include/exec/log.h
@@ -73,7 +73,7 @@ static inline void log_page_dump(const char *operation)
{
FILE *logfile = qemu_log_trylock();
if (logfile) {
- qemu_log("page layout changed following %s\n", operation);
+ fprintf(logfile, "page layout changed following %s\n", operation);
page_dump(logfile);
}
qemu_log_unlock(logfile);
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 8d0315de75..8a896e772d 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -216,16 +216,18 @@ static inline void log_cpu_exec(target_ulong pc, CPUState
*cpu,
#if defined(DEBUG_DISAS)
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
FILE *logfile = qemu_log_trylock();
- int flags = 0;
+ if (logfile) {
+ int flags = 0;
- if (qemu_loglevel_mask(CPU_LOG_TB_FPU)) {
- flags |= CPU_DUMP_FPU;
- }
+ if (qemu_loglevel_mask(CPU_LOG_TB_FPU)) {
+ flags |= CPU_DUMP_FPU;
+ }
#if defined(TARGET_I386)
- flags |= CPU_DUMP_CCOP;
+ flags |= CPU_DUMP_CCOP;
#endif
- log_cpu_state(cpu, flags);
- qemu_log_unlock(logfile);
+ log_cpu_state(cpu, flags);
+ qemu_log_unlock(logfile);
+ }
}
#endif /* DEBUG_DISAS */
}
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 71ab863c18..4812619f00 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1529,68 +1529,75 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM) &&
qemu_log_in_addr_range(tb->pc)) {
FILE *logfile = qemu_log_trylock();
- int code_size, data_size;
- const tcg_target_ulong *rx_data_gen_ptr;
- size_t chunk_start;
- int insn = 0;
+ if (logfile) {
+ int code_size, data_size;
+ const tcg_target_ulong *rx_data_gen_ptr;
+ size_t chunk_start;
+ int insn = 0;
- if (tcg_ctx->data_gen_ptr) {
- rx_data_gen_ptr = tcg_splitwx_to_rx(tcg_ctx->data_gen_ptr);
- code_size = (const void *)rx_data_gen_ptr - tb->tc.ptr;
- data_size = gen_code_size - code_size;
- } else {
- rx_data_gen_ptr = 0;
- code_size = gen_code_size;
- data_size = 0;
- }
-
- /* Dump header and the first instruction */
- qemu_log("OUT: [size=%d]\n", gen_code_size);
- qemu_log(" -- guest addr 0x" TARGET_FMT_lx " + tb prologue\n",
- tcg_ctx->gen_insn_data[insn][0]);
- chunk_start = tcg_ctx->gen_insn_end_off[insn];
- log_disas(tb->tc.ptr, chunk_start);
-
- /*
- * Dump each instruction chunk, wrapping up empty chunks into
- * the next instruction. The whole array is offset so the
- * first entry is the beginning of the 2nd instruction.
- */
- while (insn < tb->icount) {
- size_t chunk_end = tcg_ctx->gen_insn_end_off[insn];
- if (chunk_end > chunk_start) {
- qemu_log(" -- guest addr 0x" TARGET_FMT_lx "\n",
- tcg_ctx->gen_insn_data[insn][0]);
- log_disas(tb->tc.ptr + chunk_start, chunk_end - chunk_start);
- chunk_start = chunk_end;
+ if (tcg_ctx->data_gen_ptr) {
+ rx_data_gen_ptr = tcg_splitwx_to_rx(tcg_ctx->data_gen_ptr);
+ code_size = (const void *)rx_data_gen_ptr - tb->tc.ptr;
+ data_size = gen_code_size - code_size;
+ } else {
+ rx_data_gen_ptr = 0;
+ code_size = gen_code_size;
+ data_size = 0;
}
- insn++;
- }
- if (chunk_start < code_size) {
- qemu_log(" -- tb slow paths + alignment\n");
- log_disas(tb->tc.ptr + chunk_start, code_size - chunk_start);
- }
+ /* Dump header and the first instruction */
+ fprintf(logfile, "OUT: [size=%d]\n", gen_code_size);
+ fprintf(logfile,
+ " -- guest addr 0x" TARGET_FMT_lx " + tb prologue\n",
+ tcg_ctx->gen_insn_data[insn][0]);
+ chunk_start = tcg_ctx->gen_insn_end_off[insn];
+ disas(logfile, tb->tc.ptr, chunk_start);
- /* Finally dump any data we may have after the block */
- if (data_size) {
- int i;
- qemu_log(" data: [size=%d]\n", data_size);
- for (i = 0; i < data_size / sizeof(tcg_target_ulong); i++) {
- if (sizeof(tcg_target_ulong) == 8) {
- qemu_log("0x%08" PRIxPTR ": .quad 0x%016" TCG_PRIlx "\n",
- (uintptr_t)&rx_data_gen_ptr[i],
rx_data_gen_ptr[i]);
- } else if (sizeof(tcg_target_ulong) == 4) {
- qemu_log("0x%08" PRIxPTR ": .long 0x%08" TCG_PRIlx "\n",
- (uintptr_t)&rx_data_gen_ptr[i],
rx_data_gen_ptr[i]);
- } else {
- qemu_build_not_reached();
+ /*
+ * Dump each instruction chunk, wrapping up empty chunks into
+ * the next instruction. The whole array is offset so the
+ * first entry is the beginning of the 2nd instruction.
+ */
+ while (insn < tb->icount) {
+ size_t chunk_end = tcg_ctx->gen_insn_end_off[insn];
+ if (chunk_end > chunk_start) {
+ fprintf(logfile, " -- guest addr 0x" TARGET_FMT_lx "\n",
+ tcg_ctx->gen_insn_data[insn][0]);
+ disas(logfile, tb->tc.ptr + chunk_start,
+ chunk_end - chunk_start);
+ chunk_start = chunk_end;
+ }
+ insn++;
+ }
+
+ if (chunk_start < code_size) {
+ fprintf(logfile, " -- tb slow paths + alignment\n");
+ disas(logfile, tb->tc.ptr + chunk_start,
+ code_size - chunk_start);
+ }
+
+ /* Finally dump any data we may have after the block */
+ if (data_size) {
+ int i;
+ fprintf(logfile, " data: [size=%d]\n", data_size);
+ for (i = 0; i < data_size / sizeof(tcg_target_ulong); i++) {
+ if (sizeof(tcg_target_ulong) == 8) {
+ fprintf(logfile,
+ "0x%08" PRIxPTR ": .quad 0x%016" TCG_PRIlx
"\n",
+ (uintptr_t)&rx_data_gen_ptr[i],
rx_data_gen_ptr[i]);
+ } else if (sizeof(tcg_target_ulong) == 4) {
+ fprintf(logfile,
+ "0x%08" PRIxPTR ": .long 0x%08" TCG_PRIlx
"\n",
+ (uintptr_t)&rx_data_gen_ptr[i],
rx_data_gen_ptr[i]);
+ } else {
+ qemu_build_not_reached();
+ }
}
}
+ fprintf(logfile, "\n");
+ qemu_log_flush();
+ qemu_log_unlock(logfile);
}
- qemu_log("\n");
- qemu_log_flush();
- qemu_log_unlock(logfile);
}
#endif
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index 1506755f3c..af8798f98b 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -140,10 +140,12 @@ void translator_loop(const TranslatorOps *ops,
DisasContextBase *db,
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
&& qemu_log_in_addr_range(db->pc_first)) {
FILE *logfile = qemu_log_trylock();
- qemu_log("----------------\n");
- ops->disas_log(db, cpu);
- qemu_log("\n");
- qemu_log_unlock(logfile);
+ if (logfile) {
+ fprintf(logfile, "----------------\n");
+ ops->disas_log(db, cpu);
+ fprintf(logfile, "\n");
+ qemu_log_unlock(logfile);
+ }
}
#endif
}
diff --git a/cpu.c b/cpu.c
index ddcbfc724d..3340bb7538 100644
--- a/cpu.c
+++ b/cpu.c
@@ -401,12 +401,14 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP);
if (qemu_log_separate()) {
FILE *logfile = qemu_log_trylock();
- qemu_log("qemu: fatal: ");
- qemu_log_vprintf(fmt, ap2);
- qemu_log("\n");
- log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP);
- qemu_log_flush();
- qemu_log_unlock(logfile);
+ if (logfile) {
+ fprintf(logfile, "qemu: fatal: ");
+ vfprintf(logfile, fmt, ap2);
+ fprintf(logfile, "\n");
+ cpu_dump_state(cpu, logfile, CPU_DUMP_FPU | CPU_DUMP_CCOP);
+ qemu_log_flush();
+ qemu_log_unlock(logfile);
+ }
qemu_log_close();
}
va_end(ap2);
diff --git a/hw/net/can/can_sja1000.c b/hw/net/can/can_sja1000.c
index 300313dfb8..23d634af6f 100644
--- a/hw/net/can/can_sja1000.c
+++ b/hw/net/can/can_sja1000.c
@@ -249,19 +249,21 @@ static void can_display_msg(const char *prefix, const
qemu_can_frame *msg)
int i;
FILE *logfile = qemu_log_trylock();
- qemu_log("%s%03X [%01d] %s %s",
- prefix,
- msg->can_id & QEMU_CAN_EFF_MASK,
- msg->can_dlc,
- msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
- msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
+ if (logfile) {
+ fprintf(logfile, "%s%03X [%01d] %s %s",
+ prefix,
+ msg->can_id & QEMU_CAN_EFF_MASK,
+ msg->can_dlc,
+ msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
+ msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
- for (i = 0; i < msg->can_dlc; i++) {
- qemu_log(" %02X", msg->data[i]);
+ for (i = 0; i < msg->can_dlc; i++) {
+ fprintf(logfile, " %02X", msg->data[i]);
+ }
+ fprintf(logfile, "\n");
+ qemu_log_flush();
+ qemu_log_unlock(logfile);
}
- qemu_log("\n");
- qemu_log_flush();
- qemu_log_unlock(logfile);
}
static void buff2frame_pel(const uint8_t *buff, qemu_can_frame *frame)
diff --git a/net/can/can_socketcan.c b/net/can/can_socketcan.c
index 4a505643e9..a6388563c3 100644
--- a/net/can/can_socketcan.c
+++ b/net/can/can_socketcan.c
@@ -77,18 +77,21 @@ static void can_host_socketcan_display_msg(struct
qemu_can_frame *msg)
{
int i;
FILE *logfile = qemu_log_trylock();
- qemu_log("[cansocketcan]: %03X [%01d] %s %s",
- msg->can_id & QEMU_CAN_EFF_MASK,
- msg->can_dlc,
- msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
- msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
- for (i = 0; i < msg->can_dlc; i++) {
- qemu_log(" %02X", msg->data[i]);
+ if (logfile) {
+ fprintf(logfile, "[cansocketcan]: %03X [%01d] %s %s",
+ msg->can_id & QEMU_CAN_EFF_MASK,
+ msg->can_dlc,
+ msg->can_id & QEMU_CAN_EFF_FLAG ? "EFF" : "SFF",
+ msg->can_id & QEMU_CAN_RTR_FLAG ? "RTR" : "DAT");
+
+ for (i = 0; i < msg->can_dlc; i++) {
+ fprintf(logfile, " %02X", msg->data[i]);
+ }
+ fprintf(logfile, "\n");
+ qemu_log_flush();
+ qemu_log_unlock(logfile);
}
- qemu_log("\n");
- qemu_log_flush();
- qemu_log_unlock(logfile);
}
static void can_host_socketcan_read(void *opaque)
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 3fb8b530d8..d71bd2b0f4 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -2581,14 +2581,16 @@ static void gen_unknown_opcode(CPUX86State *env,
DisasContext *s)
if (qemu_loglevel_mask(LOG_UNIMP)) {
FILE *logfile = qemu_log_trylock();
- target_ulong pc = s->pc_start, end = s->pc;
+ if (logfile) {
+ target_ulong pc = s->pc_start, end = s->pc;
- qemu_log("ILLOPC: " TARGET_FMT_lx ":", pc);
- for (; pc < end; ++pc) {
- qemu_log(" %02x", cpu_ldub_code(env, pc));
+ fprintf(logfile, "ILLOPC: " TARGET_FMT_lx ":", pc);
+ for (; pc < end; ++pc) {
+ fprintf(logfile, " %02x", cpu_ldub_code(env, pc));
+ }
+ fprintf(logfile, "\n");
+ qemu_log_unlock(logfile);
}
- qemu_log("\n");
- qemu_log_unlock(logfile);
}
}
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 2f09114bf9..892f640fce 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -757,31 +757,35 @@ void tcg_prologue_init(TCGContext *s)
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
FILE *logfile = qemu_log_trylock();
- qemu_log("PROLOGUE: [size=%zu]\n", prologue_size);
- if (s->data_gen_ptr) {
- size_t code_size = s->data_gen_ptr - s->code_gen_ptr;
- size_t data_size = prologue_size - code_size;
- size_t i;
+ if (logfile) {
+ fprintf(logfile, "PROLOGUE: [size=%zu]\n", prologue_size);
+ if (s->data_gen_ptr) {
+ size_t code_size = s->data_gen_ptr - s->code_gen_ptr;
+ size_t data_size = prologue_size - code_size;
+ size_t i;
- log_disas(s->code_gen_ptr, code_size);
+ disas(logfile, s->code_gen_ptr, code_size);
- for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
- if (sizeof(tcg_target_ulong) == 8) {
- qemu_log("0x%08" PRIxPTR ": .quad 0x%016" PRIx64 "\n",
- (uintptr_t)s->data_gen_ptr + i,
- *(uint64_t *)(s->data_gen_ptr + i));
- } else {
- qemu_log("0x%08" PRIxPTR ": .long 0x%08x\n",
- (uintptr_t)s->data_gen_ptr + i,
- *(uint32_t *)(s->data_gen_ptr + i));
+ for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
+ if (sizeof(tcg_target_ulong) == 8) {
+ fprintf(logfile,
+ "0x%08" PRIxPTR ": .quad 0x%016" PRIx64 "\n",
+ (uintptr_t)s->data_gen_ptr + i,
+ *(uint64_t *)(s->data_gen_ptr + i));
+ } else {
+ fprintf(logfile,
+ "0x%08" PRIxPTR ": .long 0x%08x\n",
+ (uintptr_t)s->data_gen_ptr + i,
+ *(uint32_t *)(s->data_gen_ptr + i));
+ }
}
+ } else {
+ disas(logfile, s->code_gen_ptr, prologue_size);
}
- } else {
- log_disas(s->code_gen_ptr, prologue_size);
+ fprintf(logfile, "\n");
+ qemu_log_flush();
+ qemu_log_unlock(logfile);
}
- qemu_log("\n");
- qemu_log_flush();
- qemu_log_unlock(logfile);
}
#endif
@@ -4201,10 +4205,12 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)
&& qemu_log_in_addr_range(tb->pc))) {
FILE *logfile = qemu_log_trylock();
- qemu_log("OP:\n");
- tcg_dump_ops(s, false);
- qemu_log("\n");
- qemu_log_unlock(logfile);
+ if (logfile) {
+ fprintf(logfile, "OP:\n");
+ tcg_dump_ops(s, false);
+ fprintf(logfile, "\n");
+ qemu_log_unlock(logfile);
+ }
}
#endif
@@ -4246,10 +4252,12 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_IND)
&& qemu_log_in_addr_range(tb->pc))) {
FILE *logfile = qemu_log_trylock();
- qemu_log("OP before indirect lowering:\n");
- tcg_dump_ops(s, false);
- qemu_log("\n");
- qemu_log_unlock(logfile);
+ if (logfile) {
+ fprintf(logfile, "OP before indirect lowering:\n");
+ tcg_dump_ops(s, false);
+ fprintf(logfile, "\n");
+ qemu_log_unlock(logfile);
+ }
}
#endif
/* Replace indirect temps with direct temps. */
@@ -4267,10 +4275,12 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT)
&& qemu_log_in_addr_range(tb->pc))) {
FILE *logfile = qemu_log_trylock();
- qemu_log("OP after optimization and liveness analysis:\n");
- tcg_dump_ops(s, true);
- qemu_log("\n");
- qemu_log_unlock(logfile);
+ if (logfile) {
+ fprintf(logfile, "OP after optimization and liveness analysis:\n");
+ tcg_dump_ops(s, true);
+ fprintf(logfile, "\n");
+ qemu_log_unlock(logfile);
+ }
}
#endif
--
2.25.1
