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Bug 846368 - Add number of bytes requested to OOM last-gasp r=bsmedberg

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This commit is contained in:
Adam Roach [:abr] 2013-02-28 13:43:51 -06:00
parent c952e87e03
commit 39b30d5cd5
1 changed files with 20 additions and 1 deletions
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21
memory/mozalloc/mozalloc_oom.cpp
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@ -14,9 +14,21 @@
static mozalloc_oom_abort_handler gAbortHandler;
#define OOM_MSG_LEADER "out of memory: 0x"
#define OOM_MSG_DIGITS "0000000000000000" // large enough for 2^64
#define OOM_MSG_TRAILER " bytes requested"
#define OOM_MSG_FIRST_DIGIT_OFFSET sizeof(OOM_MSG_LEADER) - 1
#define OOM_MSG_LAST_DIGIT_OFFSET sizeof(OOM_MSG_LEADER) + \
sizeof(OOM_MSG_DIGITS) - 3
static const char *hex = "0123456789ABCDEF";
void
mozalloc_handle_oom(size_t size)
{
char oomMsg[] = OOM_MSG_LEADER OOM_MSG_DIGITS OOM_MSG_TRAILER;
int i;
// NB: this is handle_oom() stage 1, which simply aborts on OOM.
// we might proceed to a stage 2 in which an attempt is made to
// reclaim memory
@ -24,7 +36,14 @@ mozalloc_handle_oom(size_t size)
if (gAbortHandler)
gAbortHandler(size);
mozalloc_abort("out of memory");
// Insert size into the diagnostic message using only primitive operations
for (i = OOM_MSG_LAST_DIGIT_OFFSET;
size && i >= OOM_MSG_FIRST_DIGIT_OFFSET; i--) {
oomMsg[i] = hex[size % 16];
size /= 16;
}
mozalloc_abort(oomMsg);
}
void