Merge tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu into staging

testing, gdbstub, plugin and gitdm updates

  - cleanup scripts/ci/setup in advance of ppc64 runner
  - ensure detected gdb reported to TCG tests
  - update hexagon container with build deps
  - move alpine container to tagged release
  - fix overflow during qos-test test tree iteration
  - allow bios blobs to be built with test cross compilers
  - introduce monitor_puts for plain strings
  - share disas code between monitor and plugins
  - fix bug in execlog plugin
  - add more tcg plugin documentation, reorg
  - fix link to semihosting spec
  - re-factor gdbstub to use AccelClass/Ops
  - many gitdm updates
  - fix race with plugin mutex lock and linux-user fork()

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# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown]
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* tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu: (52 commits)
  plugins: add [pre|post]fork helpers to linux-user
  contrib/gitdm: add Université Grenoble Alpes
  contrib/gitdm: add Simon to individual contributors
  contrib/gitdm: add China Telecom to the domain map
  contrib/gitdm: add ISCAS to the academics group
  contrib/gitdm: add WANG Xuerui to individual contributers
  contrib/gitdm: add Paul to individual contributors
  contrib/gitdm: add mapping for Loongson Technology
  accel/kvm: move kvm_update_guest_debug to inline stub
  gdbstub: move guest debug support check to ops
  gdbstub: move breakpoint logic to accel ops
  gdbstub: move sstep flags probing into AccelClass
  gdbstub: move into its own sub directory
  semihosting: update link to spec
  docs/devel: document the test plugins
  contrib/plugins: reset skip when matching in execlog
  docs/devel: move API to end of tcg-plugins.rst
  docs/devel: clean-up qemu invocations in tcg-plugins
  plugins: Assert mmu_idx in range before use in qemu_plugin_get_hwaddr
  plugins: extend execlog to filter matches
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 25 insertions, 18 deletions

diff --git a/disas.c b/disas.c
index e31438f349..94d3b45042 100644
--- a/disas.c
+++ b/disas.c
@@ -83,18 +83,18 @@ static int print_insn_objdump(bfd_vma pc, disassemble_info *info,
                               const char *prefix)
 {
     int i, n = info->buffer_length;
-    uint8_t *buf = g_malloc(n);
-
-    info->read_memory_func(pc, buf, n, info);
-
-    for (i = 0; i < n; ++i) {
-        if (i % 32 == 0) {
-            info->fprintf_func(info->stream, "\n%s: ", prefix);
+    g_autofree uint8_t *buf = g_malloc(n);
+
+    if (info->read_memory_func(pc, buf, n, info) == 0) {
+        for (i = 0; i < n; ++i) {
+            if (i % 32 == 0) {
+                info->fprintf_func(info->stream, "\n%s: ", prefix);
+            }
+            info->fprintf_func(info->stream, "%02x", buf[i]);
         }
-        info->fprintf_func(info->stream, "%02x", buf[i]);
+    } else {
+        info->fprintf_func(info->stream, "unable to read memory");
     }
-
-    g_free(buf);
     return n;
 }
 
@@ -239,7 +239,7 @@ void target_disas(FILE *out, CPUState *cpu, target_ulong code,
     }
 }
 
-static int plugin_printf(FILE *stream, const char *fmt, ...)
+static int gstring_printf(FILE *stream, const char *fmt, ...)
 {
     /* We abuse the FILE parameter to pass a GString. */
     GString *s = (GString *)stream;
@@ -270,7 +270,7 @@ char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size)
     GString *ds = g_string_new(NULL);
 
     initialize_debug_target(&s, cpu);
-    s.info.fprintf_func = plugin_printf;
+    s.info.fprintf_func = gstring_printf;
     s.info.stream = (FILE *)ds;  /* abuse this slot */
     s.info.buffer_vma = addr;
     s.info.buffer_length = size;
@@ -358,15 +358,19 @@ void monitor_disas(Monitor *mon, CPUState *cpu,
 {
     int count, i;
     CPUDebug s;
+    g_autoptr(GString) ds = g_string_new("");
 
     initialize_debug_target(&s, cpu);
-    s.info.fprintf_func = qemu_fprintf;
+    s.info.fprintf_func = gstring_printf;
+    s.info.stream = (FILE *)ds;  /* abuse this slot */
+
     if (is_physical) {
         s.info.read_memory_func = physical_read_memory;
     }
     s.info.buffer_vma = pc;
 
     if (s.info.cap_arch >= 0 && cap_disas_monitor(&s.info, pc, nb_insn)) {
+        monitor_puts(mon, ds->str);
         return;
     }
 
@@ -376,13 +380,16 @@ void monitor_disas(Monitor *mon, CPUState *cpu,
         return;
     }
 
-    for(i = 0; i < nb_insn; i++) {
-	monitor_printf(mon, "0x" TARGET_FMT_lx ":  ", pc);
+    for (i = 0; i < nb_insn; i++) {
+        g_string_append_printf(ds, "0x" TARGET_FMT_lx ":  ", pc);
         count = s.info.print_insn(pc, &s.info);
-	monitor_printf(mon, "\n");
-	if (count < 0)
-	    break;
+        g_string_append_c(ds, '\n');
+        if (count < 0) {
+            break;
+        }
         pc += count;
     }
+
+    monitor_puts(mon, ds->str);
 }
 #endif