[v6] tcg: breakpoint reorg

[PATCH for-6.1 v6 06/17] accel/tcg: Handle -singlestep in curr_cflags

Richard Henderson posted 17 patches 4 years, 6 months ago

Diff against v1 v2 v3 v4 v5
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Maintainers: Chris Wulff <crwulff@gmail.com>, Marek Vasut <marex@denx.de>, Stafford Horne <shorne@gmail.com>, Max Filippov <jcmvbkbc@gmail.com>, Richard Henderson <richard.henderson@linaro.org>, Thomas Huth <thuth@redhat.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, David Gibson <david@gibson.dropbear.id.au>, Laurent Vivier <laurent@vivier.eu>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Bin Meng <bin.meng@windriver.com>, Palmer Dabbelt <palmer@dabbelt.com>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Artyom Tarasenko <atar4qemu@gmail.com>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aurelien Jarno <aurelien@aurel32.net>, Alistair Francis <alistair.francis@wdc.com>, Cornelia Huck <cohuck@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Michael Rolnik <mrolnik@gmail.com>, Taylor Simpson <tsimpson@quicinc.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, David Hildenbrand <david@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Eduardo Habkost <ehabkost@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Greg Kurz <groug@kaod.org>

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[PATCH for-6.1 v6 06/17] accel/tcg: Handle -singlestep in curr_cflags

Posted by Richard Henderson 4 years, 6 months ago

Exchange the test in translator_use_goto_tb for CF_NO_GOTO_TB,
and the test in tb_gen_code for setting CF_COUNT_MASK to 1.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20210717221851.2124573-6-richard.henderson@linaro.org>
---
 accel/tcg/cpu-exec.c      | 8 +++++++-
 accel/tcg/translate-all.c | 2 +-
 accel/tcg/translator.c    | 2 +-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 70ea3c7d68..2206c463f5 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -149,7 +149,13 @@ uint32_t curr_cflags(CPUState *cpu)
 {
     uint32_t cflags = cpu->tcg_cflags;
 
-    if (qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) {
+    /*
+     * For singlestep and -d nochain, suppress goto_tb so that
+     * we can log -d cpu,exec after every TB.
+     */
+    if (singlestep) {
+        cflags |= CF_NO_GOTO_TB | 1;
+    } else if (qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) {
         cflags |= CF_NO_GOTO_TB;
     }
 
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 5cc01d693b..bf82c15aab 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1432,7 +1432,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
     }
     QEMU_BUILD_BUG_ON(CF_COUNT_MASK + 1 != TCG_MAX_INSNS);
 
-    if (cpu->singlestep_enabled || singlestep) {
+    if (cpu->singlestep_enabled) {
         max_insns = 1;
     }
 
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index 2ea5a74f30..a59eb7c11b 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -39,7 +39,7 @@ bool translator_use_goto_tb(DisasContextBase *db, target_ulong dest)
     }
 
     /* Suppress goto_tb in the case of single-steping.  */
-    if (db->singlestep_enabled || singlestep) {
+    if (db->singlestep_enabled) {
         return false;
     }
 
-- 
2.25.1