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Reserve aux_id 0; sort leaks by aux_id. Fix cmp.

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This commit is contained in:
Jeff Hostetler 2015-06-28 06:56:02 -04:00
parent 93b4272895
commit 827b954ef4
2 changed files with 28 additions and 10 deletions
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26
src/win32/w32_stack.c
View File

@ -76,7 +76,7 @@ int git_win32__stack_compare(
git_win32__stack__raw_data *d1,
git_win32__stack__raw_data *d2)
{
return memcmp(d1, d2, sizeof(d1));
return memcmp(d1, d2, sizeof(*d1));
}
int git_win32__stack_format(
@ -88,7 +88,6 @@ int git_win32__stack_format(
/* SYMBOL_INFO has char FileName[1] at the end. The docs say to
* to malloc it with extra space for your desired max filename.
* We use a union to do the same thing without mallocing.
*/
struct {
SYMBOL_INFO symbol;
@ -152,12 +151,25 @@ int git_win32__stack_format(
buf_used += detail_len;
}
/* If an "aux" data provider was registered, ask it to append its detailed
* data to the end of ours using the "aux_id" it gave us when this de-duped
* item was created.
/* "aux_id" 0 is reserved to mean no aux data. This is needed to handle
* allocs that occur before the aux callbacks were registered.
*/
if (g_aux_cb_lookup)
(g_aux_cb_lookup)(pdata->aux_id, &pbuf[buf_used], (buf_len - buf_used - 1));
if (pdata->aux_id > 0) {
p_snprintf(detail, sizeof(detail), "%saux_id: %d%s",
prefix, pdata->aux_id, suffix);
detail_len = strlen(detail);
if ((buf_used + detail_len + 1) < buf_len) {
memcpy(&pbuf[buf_used], detail, detail_len);
buf_used += detail_len;
}
/* If an "aux" data provider is still registered, ask it to append its detailed
* data to the end of ours using the "aux_id" it gave us when this de-duped
* item was created.
*/
if (g_aux_cb_lookup)
(g_aux_cb_lookup)(pdata->aux_id, &pbuf[buf_used], (buf_len - buf_used - 1));
}
return GIT_OK;
}

12
src/win32/w32_stack.h
View File

@ -19,7 +19,8 @@
* This callback will be called during crtdbg-instrumented allocs.
*
* @param aux_id [out] A returned "aux_id" representing a unique
* (de-duped at the C# layer) stacktrace.
* (de-duped at the C# layer) stacktrace. "aux_id" 0 is reserved
* to mean no aux stacktrace data.
*/
typedef void (*git_win32__stack__aux_cb_alloc)(unsigned int *aux_id);
@ -60,11 +61,16 @@ GIT_EXTERN(int) git_win32__stack__set_aux_cb(
/**
* Wrapper containing the raw unprocessed stackframe
* data for a single stacktrace and any "aux_id".
*
* I put the aux_id first so leaks will be sorted by it.
* So, for example, if a specific callstack in C# leaks
* a repo handle, all of the pointers within the associated
* repo pointer will be grouped together.
*/
typedef struct {
void *frames[GIT_WIN32__STACK__MAX_FRAMES];
unsigned int nr_frames;
unsigned int aux_id;
unsigned int nr_frames;
void *frames[GIT_WIN32__STACK__MAX_FRAMES];
} git_win32__stack__raw_data;