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sketch out non-utf8 string visualization in frontend eval paths; simple retry mechanism for large memory reads that may fail across page boundaries in ctrl process memory cache

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This commit is contained in:
Ryan Fleury
2024-03-29 10:09:57 -07:00
parent 60030b298b
commit 4b3941c17f
3 changed files with 49 additions and 10 deletions
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src/ctrl/ctrl_core.c
+28 -5
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@@ -1209,14 +1209,24 @@ ctrl_query_cached_data_from_process_vaddr_range(Arena *arena, CTRL_MachineID mac
}
internal CTRL_ProcessMemorySlice
ctrl_query_cached_zero_terminated_data_from_process_vaddr_limit(Arena *arena, CTRL_MachineID machine_id, DMN_Handle process, U64 vaddr, U64 limit, U64 endt_us)
ctrl_query_cached_zero_terminated_data_from_process_vaddr_limit(Arena *arena, CTRL_MachineID machine_id, DMN_Handle process, U64 vaddr, U64 limit, U64 element_size, U64 endt_us)
{
CTRL_ProcessMemorySlice result = ctrl_query_cached_data_from_process_vaddr_range(arena, machine_id, process, r1u64(vaddr, vaddr+limit), endt_us);
for(U64 idx = 0; idx < result.data.size; idx += 1)
U64 element_count = result.data.size/element_size;
for(U64 element_idx = 0; element_idx < element_count; element_idx += 1)
{
if(result.data.str[idx] == 0)
B32 element_is_zero = 1;
for(U64 element_byte_idx = 0; element_byte_idx < element_size; element_byte_idx += 1)
{
result.data.size = idx;
if(result.data.str[element_idx*element_size + element_byte_idx] != 0)
{
element_is_zero = 0;
break;
}
}
if(element_is_zero)
{
result.data.size = element_idx*element_size;
break;
}
}
@@ -3561,7 +3571,20 @@ ctrl_mem_stream_thread__entry_point(void *p)
else
{
range_base = push_array_no_zero(range_arena, U8, range_size);
U64 bytes_read = dmn_process_read(process, vaddr_range_clamped, range_base);
U64 bytes_read = 0;
U64 retry_count = 0;
for(Rng1U64 vaddr_range_clamped_retry = vaddr_range_clamped; retry_count < 64; retry_count += 1)
{
bytes_read = dmn_process_read(process, vaddr_range_clamped_retry, range_base);
if(bytes_read == 0 && vaddr_range_clamped_retry.max > vaddr_range_clamped_retry.min)
{
vaddr_range_clamped_retry.max -= (vaddr_range_clamped_retry.max-vaddr_range_clamped_retry.min)/2;
}
else
{
break;
}
}
if(bytes_read == 0)
{
arena_release(range_arena);