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[release/9.0-staging] [mono][debugger] Fix assertion when stepping #118459

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Merged
merged 3 commits into from
Sep 4, 2025
Merged

[release/9.0-staging] [mono][debugger] Fix assertion when stepping #118459

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93a3fa4
Fix assertion when stepping
thaystg Aug 6, 2025
0c3450e
Backport of https://github.com/dotnet/runtime/pull/118542/
thaystg Aug 8, 2025
166d10e
Merge branch 'release/9.0-staging' into backport/pr-118458-to-release…
steveisok Sep 3, 2025
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11 changes: 4 additions & 7 deletions src/mono/mono/mini/mini-arm64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4204,7 +4204,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)

arm_ldrx (code, ARMREG_IP1, info_var->inst_basereg, GTMREG_TO_INT (info_var->inst_offset));
/* Add the bp_tramp_offset */
val = ((bp_tramp_offset / 4) * sizeof (target_mgreg_t)) + MONO_STRUCT_OFFSET (SeqPointInfo, bp_addrs);
val = (bp_tramp_offset * sizeof (target_mgreg_t)) + MONO_STRUCT_OFFSET (SeqPointInfo, bp_addrs);
/* Load the info->bp_addrs [bp_tramp_offset], which is either 0 or the address of the bp trampoline */
code = emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, val);
/* Skip the load if its 0 */
Expand Down Expand Up @@ -6873,9 +6873,7 @@ mono_arch_set_breakpoint (MonoJitInfo *ji, guint8 *ip)

if (enable_ptrauth)
NOT_IMPLEMENTED;
g_assert (native_offset % 4 == 0);
g_assert (info->bp_addrs [native_offset / 4] == 0);
info->bp_addrs [native_offset / 4] = (guint8*)mini_get_breakpoint_trampoline ();
info->bp_addrs [native_offset] = (guint8*)mini_get_breakpoint_trampoline ();
} else {
/* ip points to an ldrx */
code += 4;
Expand All @@ -6898,8 +6896,7 @@ mono_arch_clear_breakpoint (MonoJitInfo *ji, guint8 *ip)
if (enable_ptrauth)
NOT_IMPLEMENTED;

g_assert (native_offset % 4 == 0);
info->bp_addrs [native_offset / 4] = NULL;
info->bp_addrs [native_offset] = NULL;
} else {
/* ip points to an ldrx */
code += 4;
Expand Down Expand Up @@ -6967,7 +6964,7 @@ mono_arch_get_seq_point_info (guint8 *code)
ji = mini_jit_info_table_find (code);
g_assert (ji);

info = g_malloc0 (sizeof (SeqPointInfo) + (ji->code_size / 4) * sizeof(guint8*));
info = g_malloc0 (sizeof (SeqPointInfo) + (ji->code_size) * sizeof(guint8*));

info->ss_tramp_addr = &ss_trampoline;

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