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[release/7.0-staging] [MONO] Add JIT_CODE_DEBUG_INFO record functionality for Jitdump #87428

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merged 8 commits into from
Jun 14, 2023
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[release/7.0-staging] [MONO] Add JIT_CODE_DEBUG_INFO record functionality for Jitdump #87428

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fbeb8da
added support for JITDEBUG_INFO
saitama951 Apr 20, 2023
f196e76
added comments
saitama951 Apr 20, 2023
c48a6dc
Update mini-runtime.c
saitama951 Apr 20, 2023
f1b010c
made changes to coding conventions
saitama951 Apr 21, 2023
78579e3
Update mini-runtime.c
saitama951 Apr 24, 2023
42813e9
Update mini-runtime.c
saitama951 Apr 24, 2023
2c03cc2
Update mini-runtime.c
saitama951 Apr 24, 2023
2117a48
Update mini-runtime.c
saitama951 Apr 24, 2023
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94 changes: 91 additions & 3 deletions src/mono/mono/mini/mini-runtime.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@
#include <mono/metadata/threads.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/debug-internals.h>
#include <mono/metadata/domain-internals.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/mono-config.h>
Expand Down Expand Up @@ -2023,7 +2024,7 @@ static clockid_t clock_id = CLOCK_MONOTONIC;

enum {
JIT_DUMP_MAGIC = 0x4A695444,
JIT_DUMP_VERSION = 2,
JIT_DUMP_VERSION = 1,
#if HOST_X86
ELF_MACHINE = EM_386,
#elif HOST_AMD64
Expand All @@ -2039,7 +2040,8 @@ enum {
#elif HOST_RISCV
ELF_MACHINE = EM_RISCV,
#endif
JIT_CODE_LOAD = 0
JIT_CODE_LOAD = 0,
JIT_DEBUG_INFO = 2
};
typedef struct
{
Expand Down Expand Up @@ -2070,7 +2072,22 @@ typedef struct
// Null terminated function name
// Native code
} JitCodeLoadRecord;
typedef struct
{
guint64 code_addr;
guint32 line;
guint32 discrim;
char name[];
} DebugEntry;
typedef struct
{
RecordHeader header;
guint64 code_addr;
guint64 nr_entry;
DebugEntry debug_entry[];
} JitCodeDebug;

static void add_basic_JitCodeDebug_info (JitCodeDebug *record);
static void add_file_header_info (FileHeader *header);
static void add_basic_JitCodeLoadRecord_info (JitCodeLoadRecord *record);

Expand Down Expand Up @@ -2136,7 +2153,72 @@ mono_emit_jit_dump (MonoJitInfo *jinfo, gpointer code)

record.code_index = ++code_index;

// TODO: write debugInfo and unwindInfo immediately before the JitCodeLoadRecord (while lock is held).
DebugEntry ent;
JitCodeDebug rec;
MonoDebugMethodInfo *minfo;
MonoDebugMethodJitInfo *dmji;
MonoDebugSourceLocation *loc;
int i;

memset (&rec, 0, sizeof (rec));

//populating info relating debug methods
minfo = mono_debug_lookup_method (jinfo->d.method);
dmji = mono_debug_find_method (jinfo->d.method, NULL);

add_basic_JitCodeDebug_info (&rec);
rec.code_addr = (guint64)dmji->code_start;
rec.header.total_size = sizeof (rec) + sizeof (ent) + 1;
rec.nr_entry = 1;
for (i = 0; i < dmji->num_line_numbers; ++i){

loc = mono_debug_lookup_source_location_by_il (jinfo->d.method, dmji->line_numbers[i].il_offset, NULL);

if(!loc)
continue;

if(!loc->source_file){
mono_debug_free_source_location (loc);
continue;
}

rec.header.total_size += sizeof (ent) + strlen (loc->source_file) + 1;
rec.nr_entry++;
}

fwrite (&rec, sizeof (rec), 1, perf_dump_file);


for( i = 0; i < dmji->num_line_numbers; ++i){

//get the line number using il offset
loc = mono_debug_lookup_source_location_by_il (jinfo->d.method, dmji->line_numbers[i].il_offset, NULL);

if(!loc)
continue;

if(!loc->source_file){

mono_debug_free_source_location (loc);
continue;
}

ent.code_addr = (guint64)dmji->code_start + dmji->line_numbers[i].native_offset;
ent.discrim = 0;
ent.line = (guint32)loc->row;

fwrite (&ent, sizeof(ent), 1, perf_dump_file);
fwrite (loc->source_file, strlen (loc->source_file) + 1, 1, perf_dump_file);
}


ent.code_addr = (guint64)jinfo->code_start + jinfo->code_size;
ent.discrim = 0;
ent.line = 0;
fwrite (&ent, sizeof (ent), 1, perf_dump_file);
fwrite ("", 1, 1, perf_dump_file);

// TODO: write unwindInfo immediately before the JitCodeLoadRecord (while lock is held).

record.header.timestamp = mono_clock_get_time_ns (clock_id);

Expand All @@ -2147,7 +2229,13 @@ mono_emit_jit_dump (MonoJitInfo *jinfo, gpointer code)
mono_os_mutex_unlock (&perf_dump_mutex);
}
}
static void
add_basic_JitCodeDebug_info (JitCodeDebug *record)
{
record->header.id = JIT_DEBUG_INFO;
record->header.timestamp = mono_clock_get_time_ns (clock_id);

}
static void
add_basic_JitCodeLoadRecord_info (JitCodeLoadRecord *record)
{
Expand Down