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authorBjörn Gustavsson <[email protected]>2017-10-16 15:12:06 +0200
committerBjörn Gustavsson <[email protected]>2017-11-21 12:45:38 +0100
commit3b964e8dbaa0cd73ca7a983b3ce948e0dbd2c35c (patch)
tree3cf091c1710c97d7b730a10a726618acc4e51c62 /erts/emulator
parent892dd54fa032de737defbee22534117b1c261c60 (diff)
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Use base64 encoding in crash dumps
This will reduce the size of crash dumps, especially if there are large binaries.
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/break.c31
-rw-r--r--erts/emulator/beam/erl_process_dump.c42
-rw-r--r--erts/emulator/beam/global.h1
3 files changed, 48 insertions, 26 deletions
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index e57be5a595..e4c2801ea2 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -492,9 +492,7 @@ loaded(fmtfn_t to, void *to_arg)
static void
dump_attributes(fmtfn_t to, void *to_arg, byte* ptr, int size)
{
- while (size-- > 0) {
- erts_print(to, to_arg, "%02X", *ptr++);
- }
+ erts_print_base64(to, to_arg, ptr, size);
erts_print(to, to_arg, "\n");
}
@@ -858,7 +856,7 @@ erl_crash_dump_v(char *file, int line, char* fmt, va_list args)
}
time(&now);
- erts_cbprintf(to, to_arg, "=erl_crash_dump:0.4\n%s", ctime(&now));
+ erts_cbprintf(to, to_arg, "=erl_crash_dump:0.5\n%s", ctime(&now));
if (file != NULL)
erts_cbprintf(to, to_arg, "The error occurred in file %s, line %d\n", file, line);
@@ -975,3 +973,28 @@ erl_crash_dump_v(char *file, int line, char* fmt, va_list args)
erts_fprintf(stderr,"done\n");
}
+void
+erts_print_base64(fmtfn_t to, void *to_arg, byte* src, Uint size)
+{
+ static const byte base64_chars[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ while (size >= 3) {
+ erts_putc(to, to_arg, base64_chars[src[0] >> 2]);
+ erts_putc(to, to_arg, base64_chars[((src[0] & 0x03) << 4) | (src[1] >> 4)]);
+ erts_putc(to, to_arg, base64_chars[((src[1] & 0x0f) << 2) | (src[2] >> 6)]);
+ erts_putc(to, to_arg, base64_chars[src[2] & 0x3f]);
+ size -= 3;
+ src += 3;
+ }
+ if (size == 1) {
+ erts_putc(to, to_arg, base64_chars[src[0] >> 2]);
+ erts_putc(to, to_arg, base64_chars[(src[0] & 0x03) << 4]);
+ erts_print(to, to_arg, "==");
+ } else if (size == 2) {
+ erts_putc(to, to_arg, base64_chars[src[0] >> 2]);
+ erts_putc(to, to_arg, base64_chars[((src[0] & 0x03) << 4) | (src[1] >> 4)]);
+ erts_putc(to, to_arg, base64_chars[(src[1] & 0x0f) << 2]);
+ erts_putc(to, to_arg, '=');
+ }
+}
diff --git a/erts/emulator/beam/erl_process_dump.c b/erts/emulator/beam/erl_process_dump.c
index 5641195458..e0b795fbf3 100644
--- a/erts/emulator/beam/erl_process_dump.c
+++ b/erts/emulator/beam/erl_process_dump.c
@@ -51,6 +51,8 @@ static void stack_trace_dump(fmtfn_t to, void *to_arg, Eterm* sp);
static void print_function_from_pc(fmtfn_t to, void *to_arg, BeamInstr* x);
static void heap_dump(fmtfn_t to, void *to_arg, Eterm x);
static void dump_binaries(fmtfn_t to, void *to_arg, Binary* root);
+void erts_print_base64(fmtfn_t to, void *to_arg,
+ byte* src, Uint size);
static void dump_externally(fmtfn_t to, void *to_arg, Eterm term);
static void mark_literal(Eterm* ptr);
static void init_literal_areas(void);
@@ -193,6 +195,7 @@ dump_dist_ext(fmtfn_t to, void *to_arg, ErtsDistExternal *edep)
else {
byte *e;
size_t sz;
+
if (!(edep->flags & ERTS_DIST_EXT_ATOM_TRANS_TAB))
erts_print(to, to_arg, "D0:");
else {
@@ -210,12 +213,18 @@ dump_dist_ext(fmtfn_t to, void *to_arg, ErtsDistExternal *edep)
else {
ASSERT(*e == VERSION_MAGIC);
}
-
erts_print(to, to_arg, "E%X:", sz);
- if (edep->flags & ERTS_DIST_EXT_DFLAG_HDR)
- erts_print(to, to_arg, "%02X", VERSION_MAGIC);
- while (e < edep->ext_endp)
- erts_print(to, to_arg, "%02X", *e++);
+ if (edep->flags & ERTS_DIST_EXT_DFLAG_HDR) {
+ byte sbuf[3];
+ int i = 0;
+
+ sbuf[i++] = VERSION_MAGIC;
+ while (i < sizeof(sbuf) && e < edep->ext_endp) {
+ sbuf[i++] = *e++;
+ }
+ erts_print_base64(to, to_arg, sbuf, i);
+ }
+ erts_print_base64(to, to_arg, e, edep->ext_endp - e);
}
}
@@ -444,16 +453,13 @@ heap_dump(fmtfn_t to, void *to_arg, Eterm x)
} else if (is_binary_header(hdr)) {
Uint tag = thing_subtag(hdr);
Uint size = binary_size(x);
- Uint i;
if (tag == HEAP_BINARY_SUBTAG) {
byte* p;
erts_print(to, to_arg, "Yh%X:", size);
p = binary_bytes(x);
- for (i = 0; i < size; i++) {
- erts_print(to, to_arg, "%02X", p[i]);
- }
+ erts_print_base64(to, to_arg, p, size);
} else if (tag == REFC_BINARY_SUBTAG) {
ProcBin* pb = (ProcBin *) binary_val(x);
Binary* val = pb->val;
@@ -596,16 +602,13 @@ static void
dump_binaries(fmtfn_t to, void *to_arg, Binary* current)
{
while (current) {
- long i;
- long size = current->orig_size;
+ SWord size = current->orig_size;
byte* bytes = (byte*) current->orig_bytes;
erts_print(to, to_arg, "=binary:" PTR_FMT "\n", current);
erts_print(to, to_arg, "%X:", size);
- for (i = 0; i < size; i++) {
- erts_print(to, to_arg, "%02X", bytes[i]);
- }
- erts_putc(to, to_arg, '\n');
+ erts_print_base64(to, to_arg, bytes, size);
+ erts_putc(to, to_arg, '\n');
current = (Binary *) current->intern.flags;
}
}
@@ -644,9 +647,7 @@ dump_externally(fmtfn_t to, void *to_arg, Eterm term)
s = p = sbuf;
erts_encode_ext(term, &p);
erts_print(to, to_arg, "E%X:", p-s);
- while (s < p) {
- erts_print(to, to_arg, "%02X", *s++);
- }
+ erts_print_base64(to, to_arg, sbuf, p-s);
}
/*
@@ -802,16 +803,13 @@ dump_module_literals(fmtfn_t to, void *to_arg, ErtsLiteralArea* lit_area)
} else if (is_binary_header(w)) {
Uint tag = thing_subtag(w);
Uint size = binary_size(term);
- Uint i;
if (tag == HEAP_BINARY_SUBTAG) {
byte* p;
erts_print(to, to_arg, "Yh%X:", size);
p = binary_bytes(term);
- for (i = 0; i < size; i++) {
- erts_print(to, to_arg, "%02X", p[i]);
- }
+ erts_print_base64(to, to_arg, p, size);
} else if (tag == REFC_BINARY_SUBTAG) {
ProcBin* pb = (ProcBin *) binary_val(term);
Binary* val = pb->val;
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 440723aea6..9505942307 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -966,6 +966,7 @@ void process_info(fmtfn_t, void *);
void print_process_info(fmtfn_t, void *, Process*);
void info(fmtfn_t, void *);
void loaded(fmtfn_t, void *);
+void erts_print_base64(fmtfn_t to, void *to_arg, byte* src, Uint size);
/* sighandler sys.c */
int erts_set_signal(Eterm signal, Eterm type);