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dbghelp: Add internal_line_t structure as help in Line manipulation. 

the rationale is that:
- the file name in IMAGEHLP_LINE* structures is returned as a pointer to
  an internal buffer
- in the W64 variant of APIs, two calls to fetch_buffer() are currently needed
  (one for first A allocation, second for W conversion)
- this generate bugs as it's assumed the two buffers are different

so the internal_line_t purpose is to factorize the implementations
of the 3 variants (A32, A64, W64) into a single code path
this insures a unique allocation, and at most, one conversion

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Eric Pouech 2021-09-07 09:26:43 +02:00 committed by Alexandre Julliard
parent d459301de6
commit fabc4f7e12
1 changed files with 149 additions and 63 deletions
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212
dlls/dbghelp/symbol.c
View File

@ -1516,19 +1516,129 @@ BOOL WINAPI SymGetSymFromName(HANDLE hProcess, PCSTR Name, PIMAGEHLP_SYMBOL Symb
return TRUE;
}
/******************************************************************
* sym_fill_func_line_info
*
* fills information about a file
*/
static BOOL symt_fill_func_line_info(const struct module* module, const struct symt_function* func,
DWORD64 addr, IMAGEHLP_LINE64* line)
struct internal_line_t
{
struct line_info* dli = NULL;
BOOL found = FALSE;
int i;
BOOL unicode;
PVOID key;
DWORD line_number;
union
{
CHAR* file_nameA;
WCHAR* file_nameW;
};
DWORD64 address;
};
assert(func->symt.tag == SymTagFunction);
static void init_internal_line(struct internal_line_t* intl, BOOL unicode)
{
intl->unicode = unicode;
intl->key = NULL;
intl->line_number = 0;
intl->file_nameA = NULL;
intl->address = 0;
}
static BOOL internal_line_copy_toA32(const struct internal_line_t* intl, IMAGEHLP_LINE* l32)
{
if (intl->unicode) return FALSE;
l32->Key = intl->key;
l32->LineNumber = intl->line_number;
l32->FileName = intl->file_nameA;
l32->Address = intl->address;
return TRUE;
}
static BOOL internal_line_copy_toA64(const struct internal_line_t* intl, IMAGEHLP_LINE64* l64)
{
if (intl->unicode) return FALSE;
l64->Key = intl->key;
l64->LineNumber = intl->line_number;
l64->FileName = intl->file_nameA;
l64->Address = intl->address;
return TRUE;
}
static BOOL internal_line_copy_toW64(const struct internal_line_t* intl, IMAGEHLP_LINEW64* l64)
{
if (!intl->unicode) return FALSE;
l64->Key = intl->key;
l64->LineNumber = intl->line_number;
l64->FileName = intl->file_nameW;
l64->Address = intl->address;
return TRUE;
}
static BOOL internal_line_set_nameA(struct process* pcs, struct internal_line_t* intl, char* str, BOOL copy)
{
DWORD len;
if (intl->unicode)
{
len = MultiByteToWideChar(CP_ACP, 0, str, -1, NULL, 0);
if (!(intl->file_nameW = fetch_buffer(pcs, len * sizeof(WCHAR)))) return FALSE;
MultiByteToWideChar(CP_ACP, 0, str, -1, intl->file_nameW, len);
}
else
{
if (copy)
{
len = strlen(str) + 1;
if (!(intl->file_nameA = fetch_buffer(pcs, len))) return FALSE;
memcpy(intl->file_nameA, str, len);
}
else
intl->file_nameA = str;
}
return TRUE;
}
static BOOL internal_line_set_nameW(struct process* pcs, struct internal_line_t* intl, WCHAR* wstr, BOOL copy)
{
DWORD len;
if (intl->unicode)
{
if (copy)
{
len = (lstrlenW(wstr) + 1) * sizeof(WCHAR);
if (!(intl->file_nameW = fetch_buffer(pcs, len))) return FALSE;
memcpy(intl->file_nameW, wstr, len);
}
else
intl->file_nameW = wstr;
}
else
{
DWORD len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);
if (!(intl->file_nameA = fetch_buffer(pcs, len))) return FALSE;
WideCharToMultiByte(CP_ACP, 0, wstr, -1, intl->file_nameA, len, NULL, NULL);
}
return TRUE;
}
/******************************************************************
* get_line_from_addr
*
* fills source file information from an address
*/
static BOOL get_line_from_addr(HANDLE hProcess, DWORD64 addr,
PDWORD pdwDisplacement, struct internal_line_t* intl)
{
struct line_info* dli = NULL;
BOOL found = FALSE;
int i;
struct module_pair pair;
struct symt_ht* symt;
struct symt_function* func;
pair.pcs = process_find_by_handle(hProcess);
if (!pair.pcs) return FALSE;
pair.requested = module_find_by_addr(pair.pcs, addr, DMT_UNKNOWN);
if (!module_get_debug(&pair)) return FALSE;
if ((symt = symt_find_nearest(pair.effective, addr)) == NULL) return FALSE;
if (symt->symt.tag != SymTagFunction) return FALSE;
func = (struct symt_function*)symt;
for (i=vector_length(&func->vlines)-1; i>=0; i--)
{
@ -1536,28 +1646,28 @@ static BOOL symt_fill_func_line_info(const struct module* module, const struct s
if (!dli->is_source_file)
{
if (found || dli->u.pc_offset > addr) continue;
line->LineNumber = dli->line_number;
line->Address = dli->u.pc_offset;
line->Key = dli;
intl->line_number = dli->line_number;
intl->address = dli->u.pc_offset;
intl->key = dli;
found = TRUE;
continue;
}
if (found)
{
BOOL ret;
if (dbghelp_opt_native)
{
/* Return native file paths when using winedbg */
line->FileName = (char*)source_get(module, dli->u.source_file);
ret = internal_line_set_nameA(pair.pcs, intl, (char*)source_get(pair.effective, dli->u.source_file), FALSE);
}
else
{
WCHAR *dospath = wine_get_dos_file_name(source_get(module, dli->u.source_file));
DWORD len = WideCharToMultiByte(CP_ACP, 0, dospath, -1, NULL, 0, NULL, NULL);
line->FileName = fetch_buffer(module->process, len);
WideCharToMultiByte(CP_ACP, 0, dospath, -1, line->FileName, len, NULL, NULL);
WCHAR *dospath = wine_get_dos_file_name(source_get(pair.effective, dli->u.source_file));
ret = internal_line_set_nameW(pair.pcs, intl, dospath, TRUE);
HeapFree( GetProcessHeap(), 0, dospath );
}
return TRUE;
if (ret) *pdwDisplacement = intl->address - func->address;
return ret;
}
}
return FALSE;
@ -1622,22 +1732,6 @@ static void copy_line_64_from_32(IMAGEHLP_LINE64* l64, const IMAGEHLP_LINE* l32)
l64->Address = l32->Address;
}
/******************************************************************
* copy_line_W64_from_32 (internal)
*
*/
static void copy_line_W64_from_64(struct process* pcs, IMAGEHLP_LINEW64* l64w, const IMAGEHLP_LINE64* l64)
{
unsigned len;
l64w->Key = l64->Key;
l64w->LineNumber = l64->LineNumber;
len = MultiByteToWideChar(CP_ACP, 0, l64->FileName, -1, NULL, 0);
if ((l64w->FileName = fetch_buffer(pcs, len * sizeof(WCHAR))))
MultiByteToWideChar(CP_ACP, 0, l64->FileName, -1, l64w->FileName, len);
l64w->Address = l64->Address;
}
/******************************************************************
* copy_line_32_from_64 (internal)
*
@ -1658,13 +1752,14 @@ static void copy_line_32_from_64(IMAGEHLP_LINE* l32, const IMAGEHLP_LINE64* l64)
BOOL WINAPI SymGetLineFromAddr(HANDLE hProcess, DWORD dwAddr,
PDWORD pdwDisplacement, PIMAGEHLP_LINE Line)
{
IMAGEHLP_LINE64 il64;
struct internal_line_t intl;
il64.SizeOfStruct = sizeof(il64);
if (!SymGetLineFromAddr64(hProcess, dwAddr, pdwDisplacement, &il64))
return FALSE;
copy_line_32_from_64(Line, &il64);
return TRUE;
TRACE("(%p %p)\n", hProcess, Line);
if (Line->SizeOfStruct < sizeof(*Line)) return FALSE;
init_internal_line(&intl, FALSE);
if (!get_line_from_addr(hProcess, dwAddr, pdwDisplacement, &intl)) return FALSE;
return internal_line_copy_toA32(&intl, Line);
}
/******************************************************************
@ -1674,24 +1769,14 @@ BOOL WINAPI SymGetLineFromAddr(HANDLE hProcess, DWORD dwAddr,
BOOL WINAPI SymGetLineFromAddr64(HANDLE hProcess, DWORD64 dwAddr,
PDWORD pdwDisplacement, PIMAGEHLP_LINE64 Line)
{
struct module_pair pair;
struct symt_ht* symt;
struct internal_line_t intl;
TRACE("%p %s %p %p\n", hProcess, wine_dbgstr_longlong(dwAddr), pdwDisplacement, Line);
TRACE("(%p %p)\n", hProcess, Line);
if (Line->SizeOfStruct < sizeof(*Line)) return FALSE;
pair.pcs = process_find_by_handle(hProcess);
if (!pair.pcs) return FALSE;
pair.requested = module_find_by_addr(pair.pcs, dwAddr, DMT_UNKNOWN);
if (!module_get_debug(&pair)) return FALSE;
if ((symt = symt_find_nearest(pair.effective, dwAddr)) == NULL) return FALSE;
if (symt->symt.tag != SymTagFunction) return FALSE;
if (!symt_fill_func_line_info(pair.effective, (struct symt_function*)symt,
dwAddr, Line)) return FALSE;
*pdwDisplacement = dwAddr - Line->Address;
return TRUE;
init_internal_line(&intl, FALSE);
if (!get_line_from_addr(hProcess, dwAddr, pdwDisplacement, &intl)) return FALSE;
return internal_line_copy_toA64(&intl, Line);
}
/******************************************************************
@ -1701,13 +1786,14 @@ BOOL WINAPI SymGetLineFromAddr64(HANDLE hProcess, DWORD64 dwAddr,
BOOL WINAPI SymGetLineFromAddrW64(HANDLE hProcess, DWORD64 dwAddr,
PDWORD pdwDisplacement, PIMAGEHLP_LINEW64 Line)
{
IMAGEHLP_LINE64 il64;
struct internal_line_t intl;
il64.SizeOfStruct = sizeof(il64);
if (!SymGetLineFromAddr64(hProcess, dwAddr, pdwDisplacement, &il64))
return FALSE;
copy_line_W64_from_64(process_find_by_handle(hProcess), Line, &il64);
return TRUE;
TRACE("(%p %p)\n", hProcess, Line);
if (Line->SizeOfStruct < sizeof(*Line)) return FALSE;
init_internal_line(&intl, TRUE);
if (!get_line_from_addr(hProcess, dwAddr, pdwDisplacement, &intl)) return FALSE;
return internal_line_copy_toW64(&intl, Line);
}
/******************************************************************